Farmed crabs, live, fresh or chilled

1. Scope and Applicability

This PCR guides foreground data package construction for farmed crabs in CPC 3.0 04312, placed on the market as live, fresh, or chilled product. It covers crab aquaculture routes including hatchery or supplier seed, nursery, grow-out, fattening where the reporting operator controls the feeding and husbandry period, harvest, grading, live holding, chilling, packaging, and release at the declared gate.

Covered systems may include ponds, pens, cages, boxes, recirculating aquaculture systems, tanks, brackish-water systems, mangrove-edge systems where legally permitted, polyculture, and declared integrated aquaculture systems. Excluded products are wild-caught crabs, wild crabs only stored or graded after capture, frozen, dried, salted, brined, cooked, canned, picked-meat, roe-only, prepared, or preserved crab products, crab seed sold as a separate aquaculture input, and crab shell or processing residues modelled as separate products.

A conforming dataset must show foreground-controlled farming, fattening, nursery, or grow-out records. Wild capture followed only by live holding, chilling, grading, or dispatch is outside this PCR and belongs under the corresponding wild crab category.

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.agriculture-forestry-and-fishery-products.fish-crustaceans-molluscs-and-other-aquatic-invertebrates-products.farmed-crabs-live-fresh-or-chilled
classification_refs	CPC 3.0 04312, Farmed crabs, live, fresh or chilled
covered_products	farmed crabs sold live, fresh, or chilled from declared aquaculture, nursery, grow-out, or fattening systems
excluded_products	wild-caught crabs; wild catch only held, chilled, graded, or dispatched after capture; frozen, dried, salted, brined, cooked, canned, picked-meat, roe-only, prepared, or preserved crab products; crab seed sold as seed; crab shells, molts, and residues as separate products
representative_product	live or chilled farmed crab at declared market size and declared product form
production_route	broodstock or seed supply, hatchery or nursery where controlled, grow-out or fattening husbandry, harvest, grading, live holding or chilling, packaging, and declared gate release
market_state	live, fresh, or chilled crab with declared species, seed or broodstock source, culture system, size grade, whole or declared product basis, holding or chilling condition, packaging state, and gate

3. Reference Flow

Field	Value
What	farmed crabs as live, fresh, or chilled market product
How much	1 kg
How well	declared species or species group, farmed proof, culture system, live/fresh/chilled state, whole or declared product basis, size grade, harvest and holding condition, and gate
How long or cycle	one aquaculture production batch, fattening batch, harvest lot, or reporting period normalized to marketable product output
reference_flow_link	Reference amount and product flow below

Field	Value
Reference amount	1 kg
Reference product flow	Farmed crabs, live, fresh or chilled 08e7abb8-1abd-4a3f-86ae-991411345115
Reference flow property	Mass 93a60a56-a3c8-11da-a746-0800200b9a66
Reference unit group	Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
Reference unit	kg
Required qualifiers	species or species group; broodstock, megalopa, juvenile, soft-shell, fattening, or stocked-crab source; culture system; farmed proof or controlled husbandry period; product state; whole, live, fresh, chilled, soft-shell, fattened, or declared product basis; size grade or count per kg; sex or maturity class when commercially material; moisture or drainage basis; geography and declared gate; holding or chilling duration; feed regime; water salinity and exchange; health, biosecurity, permit, or certification status

When constructing a foreground data package, the items listed in Required qualifiers must be declared in dataset metadata, process notes, reference flow comment, product description, or an equivalent data package field. Missing required qualifiers make the reference flow definition incomplete for that data package.

Mass is the primary reference basis. Count, basket, box, tub, live-tank, or size-grade records may be used only when net mass, count per kg or mean individual mass, product form, and sampling or tare method are retained.

4. Measurement and Unit Rules

rule_id	Applies to	Required property	Required unit	Rule
reference_mass	reference product	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	The reference flow must be expressed as kg farmed crab in the declared live, fresh, or chilled product form.
farmed_production_evidence	all datasets	Record identity and production evidence	declared records	Dataset records must show controlled aquaculture, grow-out, nursery, or fattening activity, not only wild capture followed by live holding, chilling, grading, or dispatch.
product_form_mass_basis	whole, soft-shell, fattened, live, fresh, or chilled records	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Product mass must state live whole weight, chilled whole weight, soft-shell product weight, fattened crab weight, drained mass, or another contract-declared basis. Convert between bases only with measured yield evidence.
count_to_mass_conversion	stocking, mortality, grading, harvest, sales, and count-grade records	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Count-based records must include count per kg or mean individual mass, size grade, sampling method, and product form before normalization to kg reference product.
life_stage_identity	broodstock, eggs, larvae, megalopae, juveniles, soft-shell crabs, and transferred stock	Mass or count	kg, item, or life-stage count	Life-stage records must retain species, life stage, supplier or hatchery, batch, count, mass where measurable, health status, and transfer date.
feed_mass_basis	trash fish, mollusc meat, formulated feed, live feed, and supplementary feed	Mass	kg	Feed records must state wet, dry, as-fed, live-feed, or formulated-feed basis. Convert between bases only with measured moisture, supplier data, or retained farm recipe.
water_salinity_and_volume	hatchery, nursery, grow-out, fattening, live holding, washing, chilling, and wastewater	Salinity, mass, or volume	ppt, kg, or m3	Preserve controlled water volume, salinity, water-exchange, make-up water, recirculation, and discharge basis.
energy_and_fuel_inventory	pumps, aeration, oxygenation, water exchange, filtration, lighting, chilling, live holding, harvest, boats, vehicles, and delivery	Energy or fuel quantity	kWh, MJ, L, or kg	Record original electricity, fuel, oxygen, or energy carrier units before normalizing to the reference flow.
chemical_and_health_treatment_basis	disinfectants, probiotics, medicines, lime, water-treatment chemicals, oxygen, and salt	Mass, volume, or active ingredient	kg, L, g active ingredient, or m3 gas	Record product quantity, active ingredient where applicable, treatment purpose, diagnosis or health plan link, legal status, and harvest eligibility consequence.
packaging_and_ice_basis	baskets, boxes, bags, liners, labels, insulated containers, ice, gel packs, oxygenated bags, and pallets	Mass or item count	kg or item	Packaging, ice, live packs, and containers must retain material type, item count, tare or fill mass, reuse rate, and destination before normalization.

Key product attributes are foreground qualifiers recorded alongside the mass reference flow:

Attribute	Common unit	Required handling
Species	scientific and common name	required for all datasets
Culture system	pond, pen, cage, box, tank, RAS, mangrove-edge system, polyculture, fattening unit, or declared variant	required for boundary, water, feed, mortality, and discharge interpretation
Biological starting condition	broodstock, seed crab, megalopa, juvenile, soft-shell crab, fattening stock, hatchery source, or supplier	required to distinguish farmed production from wild capture
Product form	live whole, fresh whole, chilled whole, soft-shell, fattened, roe-bearing if declared, or declared variant	required for mass-basis interpretation
Size grade	count per kg, mean individual mass, carapace width, sex or maturity class, or market grade	required when count or grade records are used

5. System Boundary

The default boundary covers foreground-controlled farmed crab production to the declared farm, harvest, packhouse, dispatch, or delivery gate:

1. Broodstock, egg, larval, megalopa, juvenile, seed crab, soft-shell, or fattening-stock sourcing, including on-site hatchery and nursery activity when controlled by the reporting operator, or purchased stock disclosure when supplied by another hatchery, fisher, collector, or farm.
2. Hatchery, nursery, grow-out, and fattening husbandry, including stocking, feed, water intake and exchange, aeration, oxygenation, filtration, salinity control, health management, biosecurity, molting management, mortalities, and directly controlled maintenance.
3. Harvest, grading, washing, live holding, chilling, packaging, and declared gate release.
4. Delivery to the declared gate when the reference flow is delivered product rather than farm, harvest, dispatch, or packhouse gate product.

Capital goods and long-lived infrastructure are included only when the declared data package scope requires them. Purchased feed, seed crabs, megalopae, juveniles, packaging, ice, oxygen, electricity, fuel, and chemicals require upstream datasets unless the same operator controls and reports their production in the foreground package.

Boundary Abstraction

Field	Value
declared_starting_condition	declared_broodstock_larval_megalopa_juvenile_seed_crab_or_fattening_stocking_event
starting_condition_role	aquaculture_stock_identity_and_biological_starting_condition
product_classification_scope	current CPC 3.0 product category 04312, Farmed crabs, live, fresh or chilled
recursive_input_rule	farmed crab broodstock, larvae, megalopae, juveniles, seed crabs, soft-shell crabs, or fattening stock used to produce market product are recorded as declared biological starting conditions with supplier, hatchery, farm, life-stage, source, and health disclosure, not recursively as finished reference product output
upstream_dataset_requirement	broodstock, hatchery, seed, juvenile, soft-shell, fattening-stock, or supplier dataset, or documented source, species, batch, count or mass, life stage, health or biosecurity status, movement permission, and certification or permit evidence
disclosure	disclose species, culture system, biological starting condition, farmed production evidence, stocking density, feed regime, water source, salinity and water exchange, aeration or oxygenation, health treatments, molting and mortality records, harvest and holding conditions, product form, packaging state, declared gate, and unresolved Tiangong UUID substitutions

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
broodstock_hatchery_nursery_and_stocking	Broodstock, Hatchery, Nursery, and Stocking	required	biological starting condition must be declared; on-site hatchery and nursery rows are included when controlled by the reporting operator	foreground/upstream bridge	viable seed crabs, megalopae, juveniles, or stocked crabs entering grow-out or fattening
growout_and_fattening_husbandry	Grow-out and Fattening Husbandry	required		foreground production	harvest-size crabs before final handling
harvest_live_holding_chilling_and_packout	Harvest, Live Holding, Chilling, and Pack-out	required		foreground conditioning and gate release	declared marketable live, fresh, or chilled crab
delivery_to_declared_gate	Delivery to Declared Gate	conditional	include when the reference flow is delivered product beyond the farm, harvest, dispatch, or packhouse gate	foreground transport	delivered product at declared gate

Process: Broodstock, Hatchery, Nursery, and Stocking (broodstock_hatchery_nursery_and_stocking)

Inputs

Product flows

Broodstock, larvae, megalopae, juveniles, seed crabs, or fattening stock (biological_stock_input)

This row records purchased or internally produced biological stock entering the declared farmed crab route.

• Selected flow: Broodstock (aquaculture organisms) dca0167d-f48e-4260-bebe-0bb5687f08d6; crab larvae, megalopae, juveniles, seed crabs, soft-shell crabs, or fattening stock remain site-specific biological stock selections
• Flow property / unit: Mass or count with life stage / kg, item, or stage count
• Amount rule: measured count, mass where measurable, life stage, and accepted quantity entering hatchery, nursery, grow-out, or fattening
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1,000 kg marketable reference product
• Basis kind: Process output (process_output)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_biological_stocking_records
• Sources: fao-mud-crab-aquaculture-2011, seafdec-mud-crab-growout-2017, asc-farm-standard-2025
• Range: Provisional biological stock screening estimate
  • Range role: Default estimate (default_estimate)
  • Lower: 0.001
  • Upper: 10
  • Unit: kg biological stock live mass/kg marketable product
  • Basis: broad first-pass seed, juvenile, soft-shell, or fattening-stock live mass input relative to marketable output
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Hatchery, nursery, or stocking feed (hatchery_nursery_or_stocking_feed)

This row covers live feed, Artemia, mollusc meat, trash fish, formulated starter diets, broodstock diets, and comparable hatchery or nursery feeds.

• Selected flow: Fry feed 3b09065d-9675-4dad-8d0e-1035b5cca324; Fresh bait 40685ba7-0e7f-41bc-92b0-cec9e6696f19; other hatchery, nursery, or stocking feed selected from site records
• Flow property / unit: Mass, volume, or count / kg, g, L, cyst count, or item
• Amount rule: measured feed or live-feed quantity by batch, life stage, and basis
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per hatchery, nursery, or stocking batch and per 1,000 kg marketable reference product after normalization
• Basis kind: Process output (process_output)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_feed_records
• Sources: fao-mud-crab-aquaculture-2011, asc-feed-standard-2025
• Range: Provisional hatchery and nursery feed screening estimate
  • Range role: Default estimate (default_estimate)
  • Lower: 0
  • Upper: 5000
  • Unit: kg or feed-unit/1,000 kg marketable product
  • Basis: broad first-pass hatchery, nursery, and stocking feed input relative to marketable output
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Hatchery and nursery water (hatchery_nursery_water)

This row covers controlled seawater, freshwater, brackish water, process water, make-up water, and recirculation replacement water used in on-site hatchery and nursery operations.

• Selected flow: Process water ec205030-248c-496f-9cf2-06d9d26dc6ff
• Flow property / unit: Mass or volume / kg or m3
• Amount rule: measured intake, make-up water, treated water, or recirculation replacement volume with salinity basis retained
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per hatchery or nursery batch and per 1,000 kg marketable reference product after normalization
• Basis kind: Process output (process_output)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_water_salinity_and_discharge_records
• Sources: fao-mud-crab-aquaculture-2011, asc-farm-standard-2025
• Range: Provisional hatchery and nursery water screening estimate
  • Range role: Default estimate (default_estimate)
  • Lower: 0
  • Upper: 5000
  • Unit: m3/1,000 kg marketable product
  • Basis: broad first-pass controlled hatchery and nursery water relative to marketable output
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Hatchery and nursery electricity (hatchery_nursery_electricity)

This row covers electricity for pumps, aeration, oxygenation, filtration, lighting, chilling or heating, UV or other water treatment, and live-feed culture in on-site hatchery or nursery operations.

• Selected flow: Electricity f872677d-2f66-428a-a94e-f0fba61231df
• Flow property / unit: Energy / kWh
• Amount rule: metered electricity or allocated electricity records for hatchery and nursery operations
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per hatchery or nursery batch and per 1,000 kg marketable reference product after normalization
• Basis kind: Process output (process_output)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_energy_and_fuel_records
• Sources: asc-farm-standard-2025
• Range: Provisional hatchery electricity screening estimate
  • Range role: Default estimate (default_estimate)
  • Lower: 0
  • Upper: 20000
  • Unit: kWh/1,000 kg marketable product
  • Basis: broad first-pass on-site hatchery and nursery electricity relative to marketable output
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Waste flows

Hatchery mortalities, molts, sludge, and culture residue (hatchery_mortalities_molts_sludge_and_culture_residue)

This row records broodstock mortalities, larvae, megalopae, seed rejects, molts, shells, feed residue, sludge, biofilter solids, and rejected stock from on-site hatchery or nursery operations.

• Selected flow: Sludge 725c8f6e-7975-4155-a250-1f95ef70c508; crab mortality, shell, molt, and other organic aquaculture residue remain site-specific waste-flow selections
• Flow property / unit: Mass or count / kg or item
• Amount rule: measured mortality count, residue mass, sludge, rejected stock, and disposal or recovery route
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per hatchery or nursery batch and per 1,000 kg marketable reference product after normalization
• Basis kind: Process output (process_output)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_mortality_molt_residue_and_sludge_records
• Range: Provisional hatchery residue screening estimate
  • Range role: Default estimate (default_estimate)
  • Lower: 0
  • Upper: 2
  • Unit: kg residue/kg accepted seed or juveniles
  • Basis: broad first-pass residue or mortality mass relative to accepted seed or juveniles
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Elementary flows

No default elementary input is specified for hatchery and nursery. Add site-specific seawater withdrawal, land or water-area occupation, waterborne emissions, or direct refrigerant loss flows when the Tiangong identity and site scope are selected.

Outputs

Product flows

Accepted seed crabs or juveniles for grow-out (accepted_seed_crabs_or_juveniles_for_growout)

This output carries viable seed crabs, megalopae, juveniles, or stocked crabs into grow-out or fattening.

• Selected flow: Broodstock (aquaculture organisms) dca0167d-f48e-4260-bebe-0bb5687f08d6; crab seed, megalopae, juveniles, or stocked crabs remain site-specific biological stock selections
• Flow property / unit: Mass or count with mean size / kg, item, or stage count
• Amount rule: calculated accepted stock after receipt, nursery, grading, acclimation, and transfer losses
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: accepted stock entering grow-out or fattening
• Basis kind: Process output (process_output)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_biological_stocking_records
• Range: Stock acceptance mass-balance QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 1
  • Unit: kg/kg biological stock input
  • Basis: accepted stock fraction after receipt, grading, and nursery transfer
  • Basis kind: Process output (process_output)
  • Evidence kind: Method formula (method_formula)
  • Sources: mass-balance-identity

Waste flows

No additional waste output is specified beyond hatchery mortalities, molts, sludge, and culture residue.

Elementary flows

No default elementary output is specified for hatchery and nursery.

Process: Grow-out and Fattening Husbandry (growout_and_fattening_husbandry)

Inputs

Product flows

Accepted stocked crabs entering culture units (accepted_stocked_crabs_entering_culture_units)

This row records accepted seed crabs, juveniles, soft-shell crabs, or fattening stock stocked into grow-out or fattening culture units.

• Selected flow: Broodstock (aquaculture organisms) dca0167d-f48e-4260-bebe-0bb5687f08d6; accepted stocked crabs remain site-specific biological stock selections
• Flow property / unit: Mass or count / kg or item
• Amount rule: measured accepted count and mass entering each culture unit
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per culture unit and per 1,000 kg marketable reference product
• Basis kind: Process output (process_output)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_biological_stocking_records
• Sources: fao-mud-crab-aquaculture-2011, seafdec-mud-crab-growout-2017
• Range: Stocking input QA screening estimate
  • Range role: Default estimate (default_estimate)
  • Lower: 0.01
  • Upper: 20
  • Unit: kg stocked crab live mass/kg harvest-size crab
  • Basis: broad first-pass accepted stocked crab mass relative to harvest-size crab output
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Grow-out and fattening feed (growout_and_fattening_feed)

This row records formulated feed, trash fish, mollusc meat, mixed farm feed, and supplementary feed supplied to grow-out or fattening units.

• Selected flow: Fry feed 3b09065d-9675-4dad-8d0e-1035b5cca324; Fresh bait 40685ba7-0e7f-41bc-92b0-cec9e6696f19; other crab grow-out or fattening feed selected from site records
• Flow property / unit: Mass / kg
• Amount rule: measured net feed supplied, retaining wet, dry, as-fed, trash-fish, mollusc-meat, or formulated basis
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1,000 kg harvest-size crab output
• Basis kind: Process output (process_output)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_feed_records
• Sources: fao-mud-crab-aquaculture-2011, asc-feed-standard-2025
• Range: Provisional feed screening estimate
  • Range role: Default estimate (default_estimate)
  • Lower: 0
  • Upper: 10
  • Unit: kg feed/kg harvest-size crab
  • Basis: broad first-pass feed input relative to harvest-size crab output
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Grow-out water exchange and make-up water (growout_water_exchange_and_makeup_water)

This row records controlled brackish, seawater, freshwater, make-up, pond exchange, tank exchange, or recirculation replacement water.

• Selected flow: Process water ec205030-248c-496f-9cf2-06d9d26dc6ff
• Flow property / unit: Mass or volume / kg or m3
• Amount rule: measured intake, make-up, exchange, recirculation replacement, or pump-runtime calculated water volume with salinity and source retained
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1,000 kg harvest-size crab output
• Basis kind: Process output (process_output)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_water_salinity_and_discharge_records
• Sources: fao-mud-crab-aquaculture-2011, asc-farm-standard-2025
• Range: Provisional grow-out water screening estimate
  • Range role: Default estimate (default_estimate)
  • Lower: 0
  • Upper: 20000
  • Unit: m3/1,000 kg harvest-size crab output
  • Basis: broad first-pass controlled water intake or exchange relative to grow-out output
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Grow-out electricity and fuel (growout_electricity_and_fuel)

This row records directly controlled electricity and fuel for pumps, aeration, oxygenation, water exchange, boats, lighting, site operations, and backup generation.

• Selected flow: Electricity f872677d-2f66-428a-a94e-f0fba61231df; diesel oil 9d258d75-6792-4f1c-9856-81602ed8f816 where used
• Flow property / unit: Energy or fuel quantity / kWh, MJ, L, or kg
• Amount rule: measured electricity, fuel, or allocated energy records for grow-out and fattening operations
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1,000 kg harvest-size crab output
• Basis kind: Fuel inventory (fuel_inventory)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_energy_and_fuel_records
• Sources: asc-farm-standard-2025
• Range: Provisional grow-out energy screening estimate
  • Range role: Default estimate (default_estimate)
  • Lower: 0
  • Upper: 20000
  • Unit: kWh-equivalent/1,000 kg harvest-size crab output
  • Basis: broad first-pass directly controlled grow-out energy relative to harvest-size output
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Health treatments, water-treatment chemicals, salt, lime, and oxygen (health_treatments_chemicals_salt_lime_and_oxygen)

This row records medicines, disinfectants, probiotics, water-treatment chemicals, salt, lime, oxygen, and comparable treatment inputs.

• Selected flow: Water quality improvers 1dff627b-0317-4ff1-b733-5746b82b3e92; oxygen f804eb52-65c3-4db0-9d2d-e463b29e6e4b; other crab aquaculture treatment inputs selected from site records
• Flow property / unit: Mass, volume, active ingredient, or gas volume / kg, L, g active ingredient, or m3 gas
• Amount rule: measured quantity applied by treatment event, purpose, active ingredient where relevant, and culture unit
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per culture unit and per 1,000 kg harvest-size crab output
• Basis kind: Process output (process_output)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_health_treatment_and_chemical_records
• Sources: asc-farm-standard-2025, fao-mud-crab-aquaculture-2011
• Range: Provisional treatment input screening estimate
  • Range role: Default estimate (default_estimate)
  • Lower: 0
  • Upper: 100
  • Unit: kg or active-ingredient equivalent/1,000 kg harvest-size crab
  • Basis: broad first-pass health treatment, water-treatment chemical, salt, lime, and oxygen input relative to harvest-size output
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Waste flows

Grow-out mortalities, molts, shells, sludge, and feed residue (growout_mortalities_molts_shells_sludge_and_feed_residue)

This row records dead crabs, cannibalism losses when measurable, molts, shells, uneaten feed, pond sludge, biofilter solids, and organic residues.

• Selected flow: Sludge 725c8f6e-7975-4155-a250-1f95ef70c508; crab mortality, molt, shell, and other organic aquaculture residue remain site-specific waste-flow selections
• Flow property / unit: Mass or count / kg or item
• Amount rule: measured count, mass, reason, fate, and culture unit for mortalities and residues
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1,000 kg harvest-size crab output
• Basis kind: Process output (process_output)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_mortality_molt_residue_and_sludge_records
• Sources: fao-mud-crab-aquaculture-2011, seafdec-mud-crab-growout-2017
• Range: Provisional grow-out residue screening estimate
  • Range role: Default estimate (default_estimate)
  • Lower: 0
  • Upper: 5
  • Unit: kg residue/kg harvest-size crab
  • Basis: broad first-pass mortality, molt, shell, sludge, and residue mass relative to harvest-size output
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Elementary flows

Controlled water discharge from grow-out (controlled_growout_water_discharge)

This row records controlled pond, tank, cage, pen, RAS, or holding-unit discharge when it leaves the foreground system as an elementary waterborne release.

• Selected flow: Controlled aquaculture discharge water; use Process water ec205030-248c-496f-9cf2-06d9d26dc6ff for product water balance and select a site-specific elementary water emission flow before reviewed use
• Flow property / unit: Volume or mass / m3 or kg
• Amount rule: measured discharge or calculated discharge from intake, exchange, recirculation, retained water, and sludge removal records
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1,000 kg harvest-size crab output
• Basis kind: Process output (process_output)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_water_salinity_and_discharge_records
• Sources: asc-farm-standard-2025, mass-balance-identity
• Range: Controlled discharge QA screening estimate
  • Range role: Default estimate (default_estimate)
  • Lower: 0
  • Upper: 20000
  • Unit: m3/1,000 kg harvest-size crab output
  • Basis: broad first-pass controlled water discharge relative to grow-out output
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Outputs

Product flows

Harvest-size farmed crabs before final handling (harvest_size_farmed_crabs_before_final_handling)

This output carries harvest-size live crabs from grow-out or fattening into harvest, live holding, chilling, and pack-out.

• Selected flow: Farmed crabs, live, fresh or chilled 08e7abb8-1abd-4a3f-86ae-991411345115
• Flow property / unit: Mass / kg
• Amount rule: measured harvest-size crab mass by culture unit, product form, and grade before final handling losses
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: harvest-size crab output
• Basis kind: Process output (process_output)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_harvest_and_product_records
• Sources: fao-mud-crab-aquaculture-2011, mass-balance-identity

Waste flows

No additional waste output is specified beyond grow-out mortalities, molts, shells, sludge, and feed residue.

Elementary flows

No default elementary output is specified beyond controlled grow-out discharge when applicable.

Process: Harvest, Live Holding, Chilling, and Pack-out (harvest_live_holding_chilling_and_packout)

Inputs

Product flows

Harvest-size crabs received for final handling (harvest_size_crabs_received_for_final_handling)

This row records live harvest-size crabs entering grading, washing, live holding, chilling, or pack-out.

• Selected flow: Farmed crabs, live, fresh or chilled 08e7abb8-1abd-4a3f-86ae-991411345115
• Flow property / unit: Mass / kg
• Amount rule: measured incoming harvest-size crab mass by harvest lot, grade, product form, and holding condition
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per pack-out batch and reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_harvest_and_product_records
• Sources: mass-balance-identity
• Range: Final handling input mass-balance QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 1
  • Upper: 5
  • Unit: kg/kg reference product
  • Basis: harvest-size crab input relative to final marketable reference product after rejects, holding losses, and off-grade products
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Live holding, washing, and chilling water (live_holding_washing_and_chilling_water)

This row records controlled live holding water, washing water, chilled water, seawater, brackish water, freshwater, or ice melt water used in final handling.

• Selected flow: Process water ec205030-248c-496f-9cf2-06d9d26dc6ff
• Flow property / unit: Mass or volume / kg or m3
• Amount rule: measured or calculated water use by holding, washing, chilling, or cleaning activity
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1,000 kg marketable reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_water_salinity_and_discharge_records
• Sources: codex-cxc-52-2003, asc-farm-standard-2025
• Range: Provisional live holding and wash water screening estimate
  • Range role: Default estimate (default_estimate)
  • Lower: 0
  • Upper: 5000
  • Unit: m3/1,000 kg reference product
  • Basis: broad first-pass live holding, washing, and chilling water relative to marketable crab output
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Pack-out electricity, fuel, ice, oxygen, and packaging (packout_energy_ice_oxygen_and_packaging)

This row records electricity, fuel, ice, oxygen, baskets, boxes, bags, liners, labels, insulated containers, gel packs, pallets, and reusable container services used to prepare marketable crabs.

• Selected flow: Electricity f872677d-2f66-428a-a94e-f0fba61231df; Packaging materials, unspecified 7336a8ee-9e4d-49a6-9fe5-ce285f613245; oxygen f804eb52-65c3-4db0-9d2d-e463b29e6e4b; ice selected from site records
• Flow property / unit: Energy, mass, or item count / kWh, kg, or item
• Amount rule: measured pack-out energy, packaging, oxygen, and ice use; convert count to mass only with tare or supplier specifications
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1,000 kg marketable reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_packaging_ice_oxygen_and_energy_records
• Sources: codex-cxc-52-2003, asc-farm-standard-2025
• Range: Provisional pack-out material screening estimate
  • Range role: Default estimate (default_estimate)
  • Lower: 0
  • Upper: 2
  • Unit: kg packaging, ice, oxygen, or equivalent material/kg reference product
  • Basis: broad first-pass pack-out material mass relative to marketable crab product
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Waste flows

Pack-out rejects, dead crabs, shells, and wastewater (packout_rejects_dead_crabs_shells_and_wastewater)

This row records dead crabs, broken product, rejected grades, shells, ties, packaging waste, wastewater, and cleaning residues from final handling.

• Selected flow: Sludge 725c8f6e-7975-4155-a250-1f95ef70c508; Packaging materials, unspecified 7336a8ee-9e4d-49a6-9fe5-ce285f613245; crab reject, shell, and wastewater selected from site records
• Flow property / unit: Mass or volume / kg or m3
• Amount rule: measured reject mass, wastewater volume, packaging waste, and disposal or recovery route
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1,000 kg marketable reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_mortality_molt_residue_and_sludge_records
• Sources: codex-cxc-52-2003, mass-balance-identity
• Range: Provisional pack-out reject screening estimate
  • Range role: Default estimate (default_estimate)
  • Lower: 0
  • Upper: 1
  • Unit: kg/kg harvest-size crab received
  • Basis: broad first-pass dead crab, reject, shell, packaging waste, and wastewater mass-equivalent relative to final handling input
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Elementary flows

Add direct refrigerant loss, cleaning emissions, or waterborne emissions only when foreground records show they cross the environmental boundary and are not already represented by an upstream or waste-treatment dataset.

Outputs

Product flows

Marketable farmed crabs, live, fresh, or chilled (marketable_farmed_crabs_live_fresh_or_chilled)

This is the reference product output.

• Selected flow: Farmed crabs, live, fresh or chilled 08e7abb8-1abd-4a3f-86ae-991411345115
• Flow property / unit: Mass / kg
• Amount rule: measured marketable product mass in the declared live, fresh, or chilled form
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_harvest_and_product_records
• Range: Reference product identity
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 1
  • Upper: 1
  • Unit: kg/kg reference product
  • Basis: normalized reference product output
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Method formula (method_formula)
  • Sources: mass-balance-identity

Off-grade saleable crabs (offgrade_saleable_crabs)

This row records saleable grades that are not the declared reference product but leave the system as co-products.

• Selected flow: Farmed crabs, live, fresh or chilled 08e7abb8-1abd-4a3f-86ae-991411345115
• Flow property / unit: Mass / kg
• Amount rule: measured off-grade saleable crab mass by grade, product form, and destination
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per pack-out batch and reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_harvest_and_product_records
• Range: Provisional off-grade product screening estimate
  • Range role: Default estimate (default_estimate)
  • Lower: 0
  • Upper: 5
  • Unit: kg/kg reference product
  • Basis: broad first-pass off-grade saleable crab mass relative to declared reference product
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Waste flows

No additional waste output is specified beyond pack-out rejects, dead crabs, shells, and wastewater.

Elementary flows

No default elementary output is specified for the reference pack-out process.

Process: Delivery to Declared Gate (delivery_to_declared_gate)

Inputs

Product flows

Product transferred to controlled delivery (product_transferred_to_controlled_delivery)

This row is used when the declared reference flow is delivered beyond the farm, harvest, dispatch, or packhouse gate under the reporting operator's control.

• Selected flow: Farmed crabs, live, fresh or chilled 08e7abb8-1abd-4a3f-86ae-991411345115
• Flow property / unit: Mass / kg
• Amount rule: measured marketable product mass loaded for controlled delivery
• Value mode: Foreground record (foreground_record)
• Specificity: Route-specific (route_specific)
• Normalization basis: per controlled delivery route and reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_delivery_records
• Range: Delivery load QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 1
  • Upper: 1
  • Unit: kg/kg delivered reference product
  • Basis: loaded marketable product relative to delivered reference product after declared delivery losses
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Method formula (method_formula)
  • Sources: mass-balance-identity

Controlled delivery fuel or transport service (controlled_delivery_fuel_or_transport_service)

This row records directly controlled delivery fuel, refrigerated vehicle energy, vessel fuel, or transport service to the declared gate.

• Selected flow: Diesel oil 9d258d75-6792-4f1c-9856-81602ed8f816
• Flow property / unit: Fuel quantity or transport service / L, kg, MJ, or tonne-km
• Amount rule: measured fuel or calculated tonne-kilometres from delivered mass, distance, vehicle, vessel, refrigeration, live-holding, and route records
• Value mode: Foreground record (foreground_record)
• Specificity: Route-specific (route_specific)
• Normalization basis: per 1,000 kg delivered reference product
• Basis kind: Transport service (transport_service)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_delivery_records
• Range: Provisional controlled delivery screening estimate
  • Range role: Default estimate (default_estimate)
  • Lower: 0
  • Upper: 1000
  • Unit: tonne-km/1,000 kg delivered reference product
  • Basis: broad first-pass controlled delivery service per delivered product
  • Basis kind: Transport service (transport_service)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Waste flows

Delivery rejects or mortalities (delivery_rejects_or_mortalities)

This row records product mortalities, damaged packages, leaking live containers, rejected product, or temperature-abuse losses during controlled delivery.

• Selected flow: Sludge 725c8f6e-7975-4155-a250-1f95ef70c508; Packaging materials, unspecified 7336a8ee-9e4d-49a6-9fe5-ce285f613245; crab mortality, reject, and organic residue selected from site records
• Flow property / unit: Mass or count / kg or item
• Amount rule: measured delivery reject mass or count by reason and fate
• Value mode: Foreground record (foreground_record)
• Specificity: Route-specific (route_specific)
• Normalization basis: per 1,000 kg delivered reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_delivery_records
• Range: Delivery reject QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 1
  • Unit: kg/kg loaded product
  • Basis: rejected or dead product fraction of product loaded for delivery
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Method formula (method_formula)
  • Sources: mass-balance-identity

Elementary flows

Add direct delivery combustion or refrigerant emissions only when the foreground delivery process does not already use a dataset that carries those emissions.

Outputs

Product flows

Delivered farmed crabs (delivered_farmed_crabs)

This output is used only when the declared gate is beyond the farm, harvest, dispatch, or packhouse gate.

• Selected flow: Farmed crabs, live, fresh or chilled 08e7abb8-1abd-4a3f-86ae-991411345115
• Flow property / unit: Mass / kg
• Amount rule: delivered marketable product mass at the declared gate
• Value mode: Foreground record (foreground_record)
• Specificity: Route-specific (route_specific)
• Normalization basis: delivered reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_delivery_records
• Range: Delivered reference product identity
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 1
  • Upper: 1
  • Unit: kg/kg delivered reference product
  • Basis: normalized delivered reference product output
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Method formula (method_formula)
  • Sources: mass-balance-identity

Waste flows

No additional waste output is specified beyond delivery rejects or mortalities.

Elementary flows

No default elementary output is specified for delivery.

7. Allocation and Co-product Handling

Avoid allocation where batch records can partition burdens by species, hatchery batch, nursery unit, grow-out unit, fattening unit, harvest lot, size grade, sex or maturity class, product form, live/fresh/chilled state, or destination. Separate live, fresh, chilled, soft-shell, fattened, off-grade, and delivery products by measured mass before applying allocation.

When a single foreground batch produces several saleable grades within CPC 04312, allocate shared hatchery, nursery, grow-out, fattening, harvest, holding, chilling, packaging, and delivery burdens by declared product mass unless a reviewed market-value rule is documented. Shells, molts, mortalities, wastewater, sludge, feed residue, packaging rejects, and dead product are waste or treatment outputs unless they are sold with a separate product dataset and reference flow.

If the same site grows multiple species or products in the same pond, pen, cage, box, RAS, tank, vehicle, vessel, or packhouse route, allocate shared energy, water, feed preparation, oxygenation, filtration, labour service, and maintenance records by measured subprocess use, culture unit, biomass-time, area-time, or product mass in that order of preference. The selected allocation basis must be disclosed.

8. Foreground Data Collection, Calculation, and Quality Rules

Data Collection Protocols

protocol_id	process_id	flow_role	record_type	raw_fields	collection_method	unit	frequency	temporal_coverage	site_scope	aggregation_rule	quality_evidence
cp_biological_stocking_records	broodstock_hatchery_nursery_and_stocking; growout_and_fattening_husbandry	broodstock, larvae, megalopae, juveniles, seed crabs, soft-shell crabs, stocked crabs, and accepted transfer output	hatchery transfer, supplier invoice, fisher or collector declaration where legally allowed, stocking log, health certificate, batch sheet	species; batch id; life stage; supplier, hatchery, collector, or farm; count; mean size; mean mass where measurable; total mass; sex or maturity class where relevant; health status; biosecurity status; transfer date	supplier records, hatchery logs, transfer documents, stocking count, sampling and weighing	item, stage count, carapace width, and kg	each receipt, hatchery batch, nursery transfer, or stocking event	complete production batch or reporting year	supplier, hatchery, nursery, grow-out unit, pond, pen, cage, box, tank, or RAS module	sum accepted counts and masses by batch; calculate mean size, survival, and transfer losses before harvest normalization	signed transfer records, sampling sheet, weighing record, health certificate, permit, or certification evidence
cp_feed_records	broodstock_hatchery_nursery_and_stocking; growout_and_fattening_husbandry	live feed, formulated feed, trash fish, mollusc meat, broodstock feed, starter feed, and supplementary feed	feed issue log, supplier invoice, feed formulation, farm recipe, leftover record	feed product; feed type; wet/dry/as-fed basis; quantity issued; leftovers; feed source; marine ingredient fraction where relevant; batch id	feed inventory, supplier declarations, farm recipe, feeding logs	kg, g, L, item, or cyst count	each feed issue or batch summary	hatchery, nursery, grow-out, or fattening period	hatchery, nursery, pond, pen, cage, box, tank, or RAS module	normalize net feed supplied to accepted stock, harvest-size output, and reference product; retain wet/dry/live-feed conversion basis	feed purchase records, supplier formulation, farm recipe, stock movement logs
cp_water_salinity_and_discharge_records	broodstock_hatchery_nursery_and_stocking; growout_and_fattening_husbandry; harvest_live_holding_chilling_and_packout	controlled water intake, salinity, exchange, recirculation, live holding water, wastewater, and discharge	meter readings, pump logs, sensor records, water-quality tests, discharge permits	intake volume; make-up water; exchanged volume; recirculated volume; discharge volume; salinity; dissolved oxygen; water source; discharge route; treatment	meter, pump runtime calculation, sensor log, permit report, water management log	m3, kg, ppt, kg O2, or test result unit	daily, batch, harvest lot, or reporting period	process-specific operation period	hatchery, nursery, grow-out, fattening unit, live holding, packhouse, and discharge point	reconcile intake, exchange, recirculation, discharge, and retained water; normalize controlled water to process output and reference flow	meter calibration, sensor records, permit report, water-quality monitoring record
cp_energy_and_fuel_records	broodstock_hatchery_nursery_and_stocking; growout_and_fattening_husbandry; harvest_live_holding_chilling_and_packout	electricity, fuel, aeration, pumping, oxygen generation, filtration, chilling, and non-fuel energy	meter reading, utility bill, fuel invoice, tank drawdown, submeter, equipment log	electricity use; fuel type; meter id; process allocation; operating hours; temperature-control service; vessel or pump use	utility bill, submeter, runtime allocation, equipment log, fuel invoice	kWh, MJ, L, or kg	monthly, batch, or reporting period	reporting period and production batch overlap	farm, hatchery, nursery, grow-out unit, live holding area, packhouse, or directly controlled route	allocate by metered subprocess first, then operating hours, water volume, biomass-time, or product mass	utility bill, submeter records, fuel invoice, equipment log, allocation worksheet
cp_health_treatment_and_chemical_records	broodstock_hatchery_nursery_and_stocking; growout_and_fattening_husbandry; harvest_live_holding_chilling_and_packout	disinfectants, medicines, probiotics, salt, lime, oxygen, water-treatment chemicals, and health treatments	treatment log, veterinary or health plan, diagnosis record, purchase invoice, safety data sheet, permit record	product; active ingredient; quantity; concentration; target; diagnosis or purpose; treatment area; date; withdrawal or eligibility status	farm application log, health plan, supplier invoice, chemical inventory, permit report	kg, L, g active ingredient, or m3 gas	each application or treatment period	hatchery, nursery, grow-out, fattening, live holding, or pack-out period	treatment unit, pond, pen, cage, box, tank, RAS, storage area, or packhouse	normalize applied product or active ingredient to process output and reference product; retain non-eligible product segregation	application record, diagnosis record, health plan, invoice, permit or certification evidence
cp_mortality_molt_residue_and_sludge_records	broodstock_hatchery_nursery_and_stocking; growout_and_fattening_husbandry; harvest_live_holding_chilling_and_packout; delivery_to_declared_gate	mortalities, molts, shells, feed residue, sludge, rejects, wastewater, and delivery losses	mortality log, molting log, sludge record, reject sheet, waste manifest, recovery record	count; mass; reason; fate; date; culture unit; shell, molt, sludge, feed residue, wastewater, or reject category	farm log, hatchery log, packhouse reject record, weighing, waste contractor record	item, kg, and m3	event, batch, harvest lot, delivery route, or reporting period	full production batch, pack-out period, or delivery period	hatchery, nursery, grow-out unit, packhouse, waste handling route, or delivery route	sum by fate and normalize to process output and reference product	signed waste record, mortality log, molting log, sludge record, reject sheet, mass balance
cp_harvest_and_product_records	growout_and_fattening_husbandry; harvest_live_holding_chilling_and_packout	harvest-size product, marketable reference product, off-grade product, and product state	harvest log, grading sheet, sales invoice, dispatch record, pack-out record	harvest date; culture unit; species; product state; whole or declared basis; grade; count; sex or maturity class; mass; destination	harvest weighing, grader records, live holding records, packhouse records, invoice	kg and item	each harvest, holding, or pack-out batch	declared production batch, harvest lot, or reporting period	harvest unit, live holding area, packhouse, and declared gate	reconcile harvested input, marketable output, off-grade product, rejects, holding losses, and reference product	calibrated scale record, sales invoice, dispatch record, batch reconciliation
cp_packaging_ice_oxygen_and_energy_records	harvest_live_holding_chilling_and_packout	boxes, baskets, bags, liners, labels, ice, gel packs, oxygenated packs, pallets, reusable containers, and pack-out energy	packaging issue log, ice production or purchase record, oxygen pack record, purchase invoice, bill of materials, energy meter	packaging item; material; item count; tare mass; capacity; reuse rate; ice or gel pack mass; oxygen pack; destination; energy use	warehouse issue record, bill of materials, supplier invoice, weighing, submeter	kg, item, and kWh	each pack-out batch or reporting period	pack-out and delivery preparation period	packhouse and dispatch area	convert count to mass using tare or supplier data; allocate reusable packaging; normalize to reference product	supplier specification, packaging issue sheet, ice record, scale record
cp_delivery_records	delivery_to_declared_gate	diesel, vessel fuel, vehicle fuel, generator fuel, delivery service, delivered product, and delivery losses	fuel purchase, tank drawdown, vessel log, vehicle log, delivery log, dispatch note, receiving note	fuel type; quantity; route; vehicle or vessel; distance; load; live-holding or refrigeration service; delivery date; rejects; receiving gate	fuel invoice, tank gauge, vehicle or vessel log, GPS or route log, receiving record	L, kg, MJ, tonne-km, and kg product	each trip, work event, delivery route, or reporting period	delivery period	directly controlled routes, vessels, vehicles, equipment, and declared gate	normalize fuel or tonne-km to product mass; calculate delivery losses; avoid double counting supplier-delivered inputs	fuel invoice, odometer, vessel log, delivery manifest, receiving note

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
normalize_to_reference_flow	all foreground rows	normalized_amount = measured_or_calculated_amount / marketable_reference_product_mass. Preserve raw records and product-form basis.	measured amount; marketable_reference_product_mass	amount per 1 kg reference product	mass-balance-identity
calculate_stock_acceptance_and_survival	broodstock_hatchery_nursery_and_stocking and growout_and_fattening_husbandry	accepted_stock = received_or_produced_stock - rejected_stock; survival_to_harvest = harvested_count / stocked_count when count records are available. Retain count-to-mass conversion separately.	received stock; produced megalopae; rejected stock; stocked count; harvested count; mortality count	accepted stock, survival indicator, and QA check	mass-balance-identity
calculate_feed_conversion_indicator	growout_and_fattening_husbandry	feed_conversion_indicator = net_feed_mass / harvest_size_product_mass on the declared feed mass basis. Do not compare wet, dry, trash-fish, mollusc-meat, and as-fed records without conversion evidence.	feed_mass; feed basis; harvest_size_product_mass	feed mass per kg harvest-size crab	asc-feed-standard-2025
calculate_controlled_discharge	water intake and discharge rows	controlled_discharge = measured_discharge or intake - recirculated_volume - retained_or_removed_water adjustment when meters are incomplete.	intake; discharge; recirculated volume; retained water; sludge water	controlled discharge volume by process	mass-balance-identity
reconcile_packout_mass	harvest_live_holding_chilling_and_packout	harvested_input_mass = reference_product_mass + offgrade_saleable_mass + reject_mass + measured holding, mortality, drainage, or cleaning loss on the same product-form basis.	harvested_input_mass; reference_product_mass; offgrade_mass; reject_mass; holding_loss	pack-out mass balance	mass-balance-identity
calculate_packaging_and_ice_mass	packaging, ice, oxygen, and reusable container rows	material_mass = item_count * tare_or_supplier_mass, adjusted for reuse allocation where applicable.	item count; tare mass; supplier mass; reuse rate; ice mass	kg packaging, ice, oxygen, or container service per reference product	mass-balance-identity
calculate_delivery_transport_service	delivery_to_declared_gate	transport_service = delivered_product_mass_tonnes * one-way controlled delivery distance.	delivered mass; controlled distance; route	tonne-kilometres	mass-balance-identity

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
identity_and_scope	all datasets	Declare CPC code, species, farmed production evidence, biological starting condition, culture system, product state, geography, and declared gate.	dataset metadata, stocking records, hatchery records, product description, permit, certification, or movement evidence
mass_basis_consistency	reference product, stock, harvest, pack-out, rejects, feed, packaging, and ice	Keep whole, soft-shell, fattened, live, fresh, chilled, drained, wet, dry, trash-fish, count, container, and net mass bases separate unless measured conversion evidence exists.	scale records, product specifications, count per kg records, container tare, moisture or drainage evidence
feed_and_health_disclosure	hatchery, nursery, grow-out, and fattening rows	Retain feed type, feed basis, feed recipe, supplier formulation, health treatments, medicine eligibility, and biosecurity records where applicable.	feed logs, supplier data, farm recipe, health plan, treatment logs
water_salinity_and_discharge_disclosure	hatchery, nursery, grow-out, fattening, live holding, and pack-out	Distinguish controlled intake, exchange, recirculation, oxygenation, salinity, live holding, cleaning, and discharge.	water meters, sensor logs, oxygen logs, pump logs, discharge permits, monitoring reports
mortality_molt_residue_and_sludge_completeness	stock, grow-out, fattening, pack-out, and delivery rows	Record mortalities, molts, shells, feed residue, sludge, rejects, and fate by batch or reporting period.	mortality log, molting log, reject sheet, sludge record, waste manifest, recovery record
allocation_transparency	multi-species, multi-grade, or shared-system operations	State the partitioning or allocation basis before publishing a secondary or background dataset.	allocation worksheet, grade mass records, pond records, cage records, RAS module records, route logs
temporal_representativeness	all foreground rows	Cover a complete aquaculture production batch, fattening batch, harvest lot, holding period, delivery route, or representative reporting period; disclose partial-cycle or pilot-scale datasets.	production calendar, stocking and harvest dates, hatchery records, delivery records, reporting-period records

9. Validation Rules

A foreground data package conforms to this PCR only when:

• the reference product is normalized to 1 kg farmed crab in a declared live, fresh, or chilled product form;
• species, biological starting condition, farmed production evidence, culture system, product state, product form, size grade, geography, declared gate, holding duration, and packaging state are declared;
• the dataset distinguishes farmed grow-out, nursery, or fattening from wild catch and does not use this PCR for wild capture followed only by storage, live holding, chilling, grading, or dispatch;
• broodstock, larval, megalopa, juvenile, seed crab, stocked crab, feed, controlled water, energy, fuel, health treatment or chemical use, mortality, molt or residue, harvest, pack-out, packaging, and delivery where relevant are either present or explicitly marked not applicable with a reason;
• count, basket, box, tank, tub, or size-grade records include actual net mass, count per kg or mean mass, stage, product form, tare where relevant, and sampling method;
• water rows distinguish controlled water intake, exchange, recirculation, oxygenation, salinity, discharge, and live holding water;
• feed records distinguish formulated feed, trash fish, mollusc feed, live feed, wet basis, dry basis, and as-fed basis;
• pack-out mass balance reconciles harvested input, reference product, saleable off-grade product, rejects, and holding, mortality, drainage, or cleaning losses;
• same-site multi-species, shared-pond, shared-pen, shared-cage, shared-box, shared-RAS, shared-packhouse, or multi-grade allocation is documented before the dataset is used as a background or secondary dataset.

10. Published Dataset Profile

Field	Value
dataset_role	foreground production package that may be published as a secondary_dataset or background_dataset after review
downstream_use	use as farmed crab input to seafood processing, food service, retail, cold-chain, live seafood distribution, or regional food-product lifecycle models
allowed_use	farmed crab live, fresh, or chilled datasets with declared farmed production evidence, species, culture system, product state, gate, and quality disclosures
excluded_use	wild-caught crab datasets, wild catch only held or chilled after capture, frozen/dried/salted/brined/cooked/canned/picked-meat/prepared products, seed sold as seed, shell residue datasets, and datasets lacking farmed production or culture-system disclosure
required_metadata	canonical PCR id; CPC code; species; biological starting condition; farmed production evidence; culture system; product state; whole or declared basis; size grade or count per kg; sex or maturity class where material; geography; declared gate; holding or chilling duration; feed regime; water salinity and exchange basis; packaging state; data period; allocation basis
required_quality_disclosure	missing UUIDs; unresolved crab seed, shell, molt, mortality, wastewater, ice, and site-specific treatment flow identities; feed wet/dry/trash-fish conversion; water salinity and discharge records; health treatment eligibility; mortality and molt completeness; pack-out mass balance; partial-cycle, pilot-scale, or proxy data use
update_trigger	revise when CPC mapping changes, Tiangong crab, seed, feed, oxygen, water, discharge, sludge, shell, packaging, or treatment flow identities are updated, ASC, Codex, FAO, SEAFDEC, or equivalent aquaculture and seafood handling guidance changes, or reviewed foreground datasets provide better source-backed ranges

11. Data Sources

Source id	Type	Reference	Used for
codex-cxc-52-2003	standard	https://www.fao.org/input/download/standards/10273/CXP_052e.pdf	fish and fishery product handling, chilled aquatic products, temperature control, damage prevention, aquaculture and seafood hygiene context
fao-mud-crab-aquaculture-2011	handbook	https://www.fao.org/4/ba0110e/ba0110e.pdf	mud crab biology, hatchery, nursery, grow-out, disease control, harvest, processing, packing, and market-readiness process decomposition used as crab-specific aquaculture guidance
seafdec-mud-crab-growout-2017	extension_guidance	https://repository.seafdec.org.ph/bitstream/handle/10862/3181/3181-GenodepaJG2017.pdf	mud crab grow-out systems, ponds, pens, cages, fattening context, cannibalism and survival management, and harvest handling guidance
asc-farm-standard-2025	standard	https://programme-centre.asc-aqua.org/app/uploads/2025/08/ASC-STD-001-ASC-Farm-Standard-V1.0.1-Aug-2025.pdf	current ASC farm-level aquaculture requirements for site scope, traceability, water, energy, health, legal, environmental, and feed-related disclosures
asc-feed-standard-2025	standard	https://programme-centre.asc-aqua.org/app/uploads/2025/04/ASC-STD-002-ASC-Feed-Standard-V1.1-May-2025.pdf	aquafeed supplier, ingredient, traceability, and feed disclosure context
mass-balance-identity	method_factor	Conservation of mass applied as a PCR calculation identity for stock acceptance, survival, grow-out, discharge, pack-out, packaging, delivery, and reference-flow normalization.	QA guardrails, survival, feed conversion, yield, pack-out reconciliation, packaging conversion, delivery-service calculation, and normalization rules