Farmed lobsters (Homarus spp.), live, fresh or chilled

1. Scope and Applicability

This PCR guides foreground data package construction for farmed lobsters of the genus Homarus in CPC 3.0 04332, placed on the market as live, fresh, or chilled product. It covers declared aquaculture routes for Homarus americanus, Homarus gammarus, or another explicitly identified Homarus species, including broodstock or egg supply, hatchery larval rearing, postlarval or juvenile nursery, grow-out or sea-based container culture where controlled by the reporting operator, harvest, grading, live holding, chilling, packaging, and release at the declared gate.

Covered systems may include onshore hatcheries, nurseries, tanks, recirculating aquaculture systems, individual compartments, sea-based containers, cages, ranching or enhancement systems when the operator controls the grow-out period and harvest lot, and other declared Homarus aquaculture systems. Excluded products are wild-caught Homarus lobsters, wild catch only stored or graded after capture, farmed rock lobster and other sea crawfish, farmed Norway lobsters, frozen, dried, salted, brined, cooked, canned, meat-only, prepared, or preserved lobster products, seed or juveniles sold as separate aquaculture inputs, and shells or processing residues modelled as separate products.

Because commercial Homarus farming is often pilot-scale, enhancement-oriented, or regionally specific, a conforming dataset must show foreground-controlled aquaculture, hatchery, nursery, grow-out, sea-based container, or ranching records. Wild capture followed only by live holding, chilling, grading, or dispatch is outside this PCR and belongs under the corresponding wild Homarus 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-lobsters-homarus-spp-live-fresh-or-chilled
classification_refs	CPC 3.0 04332, Farmed lobsters (Homarus spp.), live, fresh or chilled
covered_products	farmed Homarus spp. lobsters sold live, fresh, or chilled from declared aquaculture, hatchery, nursery, grow-out, sea-based container culture, ranching, or enhancement production systems
excluded_products	wild-caught Homarus lobsters; wild catch only held, chilled, graded, or dispatched after capture; farmed or wild rock lobster and other sea crawfish; farmed or wild Norway lobsters; frozen, dried, salted, brined, cooked, canned, meat-only, prepared, or preserved products; eggs, larvae, postlarvae, or juveniles sold as seed; shells, molts, and residues as separate products
representative_product	live or chilled farmed Homarus lobster at declared market size and declared product form
production_route	broodstock or egg supply, hatchery and larval rearing, postlarval or juvenile nursery, grow-out or sea-based container culture, harvest, grading, live holding or chilling, packaging, and declared gate release
market_state	live, fresh, or chilled Homarus lobster with declared species, broodstock or seed 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 Homarus spp. lobsters as live, fresh, or chilled market product
How much	1 kg
How well	declared Homarus species, 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, grow-out 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 lobsters (Homarus spp.), live, fresh or chilled 9dca0441-44a0-496b-8f6d-f2aeb7db063f
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	Homarus species; broodstock, berried female, egg, larval, postlarval, juvenile, or grow-out stock source; culture system; farmed proof or controlled husbandry period; product state; whole, live, fresh, chilled, tailed if exceptionally declared, or declared product basis; size grade, carapace length, individual mass, 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 or natural-feed claim; water temperature, 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, crate, tote, live-tank, compartment, size-grade, carapace-length, or individual-weight records may be used only when net mass, count per kg or mean individual mass, product form, sampling method, and 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 Homarus lobster 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, hatchery, nursery, grow-out, sea-based container, ranching, or enhancement activity, not only wild capture followed by live holding, chilling, grading, or dispatch.
product_form_mass_basis	whole, live, fresh, chilled, tailed, drained, or packed records	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Product mass must state live whole weight, chilled whole weight, drained mass, tail mass if exceptionally declared, 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, carapace length or size grade, sampling method, and product form before normalization to kg reference product.
life_stage_identity	broodstock, berried females, eggs, larvae, postlarvae, juveniles, and transferred stock	Mass or count	kg, item, egg count, larval count, or juvenile count	Life-stage records must retain species, life stage, supplier or hatchery, batch, count, mass where measurable, development stage, health status, and transfer date.
feed_mass_basis	live feed, Artemia, mussel or fish feed, formulated feed, bait, and natural-feed claims	Mass, count, or service basis	kg, g, item, cyst count, or compartment-month	Feed records must state wet, dry, as-fed, live-feed, formulated-feed, or natural-feed basis. Natural-feed grow-out systems must document the absence of added feed and the grow-out service basis.
water_temperature_salinity_and_volume	hatchery, nursery, grow-out, live holding, washing, chilling, and wastewater	Temperature, salinity, mass, or volume	deg C, ppt, kg, or m3	Preserve controlled water volume, temperature, salinity, water-exchange, recirculation, make-up water, and discharge basis. Temperature control must be declared when energy use depends on chilling or heating.
energy_and_fuel_inventory	pumps, aeration, oxygenation, chilling, heating, filtration, lighting, live holding, vessel work, 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, water-treatment chemicals, oxygen, anesthetic, 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	crates, boxes, bags, liners, bands, 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	hatchery, nursery, RAS, tank, compartment, sea-based container, cage, ranching unit, enhancement area, or declared variant	required for boundary, water, feed, mortality, and discharge interpretation
Biological starting condition	broodstock, berried female, eggs, larvae, postlarvae, juveniles, hatchery source, supplier source, or grow-out transfer	required to distinguish farmed production from wild capture
Product form	live whole, fresh whole, chilled whole, tail-only if exceptionally declared, or declared variant	required for mass-basis interpretation
Size grade	count per kg, mean individual mass, carapace length, sex, maturity class, or market grade	required when count or grade records are used

5. System Boundary

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

1. Broodstock, berried female, egg, larval, postlarval, juvenile, or grow-out 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, larval, nursery, grow-out, sea-based container, or ranching husbandry, including stocking, feed or natural-feed management, water intake and exchange, aeration, oxygenation, filtration, temperature control, salinity control, shelters or compartments, health management, biosecurity, mortalities, and directly controlled maintenance.
3. Harvest, grading, washing, banding, 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, live feed, broodstock, eggs, larvae, postlarvae, juveniles, containers, shelters, 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_berried_female_egg_larval_postlarval_juvenile_or_growout_stocking_event
starting_condition_role	aquaculture_stock_identity_and_biological_starting_condition
product_classification_scope	current CPC 3.0 product category 04332, Farmed lobsters (Homarus spp.), live, fresh or chilled
recursive_input_rule	farmed Homarus broodstock, berried females, eggs, larvae, postlarvae, juveniles, or grow-out 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, egg, larval, postlarval, juvenile, grow-out 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 or compartment count, feed regime or natural-feed claim, water source, temperature, salinity and water exchange, aeration or oxygenation, health treatments, mortality and molt 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 larvae, postlarvae, juveniles, or stocked Homarus entering grow-out
growout_and_husbandry	Grow-out and Husbandry	required	include tank, RAS, compartment, cage, sea-based container, ranching, or declared grow-out system	foreground production	harvest-size Homarus lobsters 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 Homarus lobster
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, berried females, eggs, larvae, postlarvae, or juveniles (biological_stock_input)

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

• Selected flow: Homarus broodstock, berried females, eggs, larvae, postlarvae, juveniles, or grow-out stock selected from foreground records
• Flow property / unit: Mass or count with life stage / kg, item, egg count, larval count, or juvenile count
• Amount rule: measured count, mass where measurable, life stage, and accepted quantity entering hatchery, nursery, grow-out, ranching, or sea-based container culture
• 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: noaa-homarid-hatcheries-1999, dtu-european-lobster-larvae-2023, 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 broodstock, juvenile, or postlarval live mass input relative to marketable output
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Hatchery live feed, Artemia, mussel, fish, and starter feed (hatchery_live_feed_and_starter_feed)

This row covers live feed, Artemia, mussel or fish diets, 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 or nursery 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 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_feed_records
• Sources: dtu-european-lobster-larvae-2023, noaa-homarid-hatcheries-1999, asc-farm-standard-2025
• Range: Provisional hatchery 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 and nursery 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 temperature and 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_temperature_salinity_and_discharge_records
• Sources: dtu-european-lobster-larvae-2023, 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, live-feed culture, and individual-compartment systems.

• 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: dtu-european-lobster-larvae-2023, 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, postlarvae, rejected juveniles, 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; Homarus 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 juveniles or postlarvae
  • Basis: broad first-pass residue or mortality mass relative to accepted juveniles or postlarvae
  • 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, waterborne emissions, direct refrigerant loss, or land or marine area occupation flows when the Tiangong identity and site scope are selected.

Outputs

Product flows

Accepted larvae, postlarvae, or juveniles for grow-out (accepted_larvae_postlarvae_or_juveniles_for_growout)

This output carries viable Homarus larvae, postlarvae, juveniles, or stocked lobsters into grow-out, ranching, or sea-based container culture.

• Selected flow: Homarus larvae, postlarvae, juveniles, or stocked lobsters selected from foreground records
• Flow property / unit: Mass or count with mean size / kg, item, larval count, postlarval count, or juvenile count
• Amount rule: calculated accepted stock after receipt, hatchery, 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 ranching
• 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: dtu-european-lobster-larvae-2023, noaa-field-growout-lobster-2013

Process: Grow-out and Husbandry (growout_and_husbandry)

Inputs

Product flows

Grow-out feed, bait, natural feed support, and supplements (growout_feed_bait_natural_feed_and_supplements)

This row records added feed, bait, mussel or fish diets, formulated feed, supplements, and natural-feed documentation for grow-out or container systems.

• Selected flow: Fry feed 3b09065d-9675-4dad-8d0e-1035b5cca324; Fresh bait 40685ba7-0e7f-41bc-92b0-cec9e6696f19; other Homarus grow-out feed selected from site records
• Flow property / unit: Mass or service basis / kg, g, item, or compartment-month
• Amount rule: measured feed or bait quantity by batch, or documented zero-added-feed claim with compartment, stocking, and exposure records
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per grow-out 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: vliz-sea-based-container-culture-2022, noaa-field-growout-lobster-2013, asc-farm-standard-2025
• Range: Provisional grow-out feed screening estimate
  • Range role: Default estimate (default_estimate)
  • Lower: 0
  • Upper: 10000
  • Unit: kg feed/1,000 kg marketable product
  • Basis: broad first-pass added-feed input; zero applies only when natural-feed systems retain evidence
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Grow-out water, exchange, and life-support service (growout_water_exchange_and_life_support)

This row records make-up water, exchanged water, recirculated water, seawater pumping, oxygenation, shelter or compartment life-support services, and water-quality management.

• Selected flow: Process water ec205030-248c-496f-9cf2-06d9d26dc6ff
• Flow property / unit: Mass or volume / kg or m3
• Amount rule: measured water intake, exchange, recirculation replacement, or life-support volume with temperature, salinity, and culture unit retained
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per grow-out 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_temperature_salinity_and_discharge_records
• Sources: vliz-sea-based-container-culture-2022, asc-farm-standard-2025, noaa-american-lobster-species
• Range: Provisional grow-out water screening estimate
  • Range role: Default estimate (default_estimate)
  • Lower: 0
  • Upper: 10000
  • Unit: m3/1,000 kg marketable product
  • Basis: broad first-pass grow-out water intake or exchange relative to marketable output
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Grow-out electricity and fuel (growout_electricity_and_fuel)

This row covers electricity and fuel for pumps, aeration, oxygenation, filtration, chilling or heating, lighting, monitoring, vessels, maintenance, and site visits.

• 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: metered electricity, fuel purchase, vessel log, or allocated energy records for grow-out and husbandry
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per grow-out 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, vliz-sea-based-container-culture-2022
• Range: Provisional grow-out energy screening estimate
  • Range role: Default estimate (default_estimate)
  • Lower: 0
  • Upper: 50000
  • Unit: kWh or MJ-equivalent/1,000 kg marketable product
  • Basis: broad first-pass grow-out energy and fuel use relative to marketable output
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Health, biosecurity, and water-treatment inputs (health_biosecurity_and_water_treatment_inputs)

This row covers disinfectants, therapeutants, probiotics, oxygen, salt, anesthetic, water-quality improvers, and other health or biosecurity inputs.

• Selected flow: Site-specific health, biosecurity, oxygen, salt, anesthetic, or water-treatment input selected from foreground records
• Flow property / unit: Mass, volume, active ingredient, or gas volume / kg, L, g active ingredient, or m3
• Amount rule: measured product quantity, active ingredient where applicable, treatment reason, legal status, and harvest eligibility consequence
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per treatment event 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_treatment_biosecurity_and_health_records
• Sources: asc-farm-standard-2025
• Range: Provisional treatment input screening estimate
  • Range role: Default estimate (default_estimate)
  • Lower: 0
  • Upper: 500
  • Unit: kg or L product/1,000 kg marketable product
  • Basis: broad first-pass health and water-treatment product input
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Waste flows

Grow-out mortalities, molts, shells, sludge, and residues (growout_mortalities_molts_shells_sludge_and_residues)

This row records mortalities, culled animals, molts, shells, uneaten feed, biofouling removed from containers, sludge, and other organic residues.

• Selected flow: Sludge 725c8f6e-7975-4155-a250-1f95ef70c508; Homarus mortality, molt, shell, and 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, removed biofouling, sludge, culls, and disposal or recovery route
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per grow-out 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
• Sources: asc-farm-standard-2025, vliz-sea-based-container-culture-2022
• Range: Provisional grow-out residue screening estimate
  • Range role: Default estimate (default_estimate)
  • Lower: 0
  • Upper: 5
  • Unit: kg residue/kg marketable product
  • Basis: broad first-pass mortality, molt, sludge, and residue mass relative to marketable output
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Elementary flows

Direct waterborne emissions and escapes (direct_waterborne_emissions_and_escapes)

This row records direct nutrient releases, suspended solids, treatment residues, and known escapes when they leave the foreground system to the environment.

• Selected flow: Site-specific waterborne emission or escape flow selected from foreground records
• Flow property / unit: Mass, count, or concentration-load / kg, g, item, or kg nutrient
• Amount rule: measured or calculated load from water-quality records, effluent volume, treatment records, known escape counts, and mass-balance checks
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1,000 kg marketable reference product
• Basis kind: Process output (process_output)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_water_temperature_salinity_and_discharge_records
• Sources: asc-farm-standard-2025, vliz-sea-based-container-culture-2022
• Range: Provisional direct release screening estimate
  • Range role: Default estimate (default_estimate)
  • Lower: 0
  • Upper: 500
  • Unit: kg released material/1,000 kg marketable product
  • Basis: broad first-pass direct waterborne release, solids, nutrient, or residue load
  • Basis kind: Process output (process_output)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Outputs

Product flows

Harvest-size Homarus lobsters (harvest_size_homarus_lobsters)

This output carries harvest-size Homarus lobsters from grow-out to harvest, live holding, chilling, or pack-out.

• Selected flow: Farmed lobsters (Homarus spp.), live, fresh or chilled 9dca0441-44a0-496b-8f6d-f2aeb7db063f
• Flow property / unit: Mass / kg
• Amount rule: measured harvest-size live mass before final handling, with count, size grade, and product basis retained
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: grow-out output entering harvest and final handling
• Basis kind: Process output (process_output)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_harvest_and_product_mass_records
• Range: Harvest mass-balance QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 1
  • Unit: kg/kg stocked biomass plus biomass gain
  • Basis: harvestable biomass fraction after mortality, culling, and grading
  • Basis kind: Process output (process_output)
  • Evidence kind: Method formula (method_formula)
  • Sources: noaa-field-growout-lobster-2013, asc-farm-standard-2025

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

Inputs

Product flows

Holding water, ice, oxygen, and packaging (holding_water_ice_oxygen_and_packaging)

This row records live-holding water, chilling ice, oxygen, bands, crates, boxes, liners, insulated containers, labels, and pallets.

• Selected flow: Process water ec205030-248c-496f-9cf2-06d9d26dc6ff; Packaging materials, unspecified 7336a8ee-9e4d-49a6-9fe5-ce285f613245; ice, oxygen, bands, and live-pack materials selected from site records
• Flow property / unit: Mass, volume, gas volume, or item count / kg, m3, L, m3 gas, or item
• Amount rule: measured material, water, ice, oxygen, and packaging quantities with reuse, tare, and product basis retained
• 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_live_holding_and_chilling_records
• Sources: asc-farm-standard-2025
• Range: Provisional pack-out material screening estimate
  • Range role: Default estimate (default_estimate)
  • Lower: 0
  • Upper: 1000
  • Unit: kg material or water/1,000 kg marketable product
  • Basis: broad first-pass holding water, ice, oxygen, and packaging input
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Live holding, chilling, and pack-out energy (live_holding_chilling_and_packout_energy)

This row covers electricity and fuel for live tanks, pumps, aeration, oxygenation, refrigeration, ice making, grading, packing, and cold storage.

• 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: metered electricity, fuel purchase, or allocated energy records for live holding, chilling, and pack-out
• 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_energy_and_fuel_records
• Sources: asc-farm-standard-2025
• Range: Provisional live holding and pack-out energy screening estimate
  • Range role: Default estimate (default_estimate)
  • Lower: 0
  • Upper: 20000
  • Unit: kWh or MJ-equivalent/1,000 kg marketable product
  • Basis: broad first-pass live holding, chilling, and pack-out energy use
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Waste flows

Pack-out rejects, mortalities, wastewater, and used packaging (packout_rejects_mortalities_wastewater_and_used_packaging)

This row records dead-on-arrival animals, culls, rejected product, wastewater, spent ice melt, used bands, damaged boxes, and non-reused packaging.

• Selected flow: Sludge 725c8f6e-7975-4155-a250-1f95ef70c508; packaging materials, wastewater, lobster rejects, and organic residue selected from site records
• Flow property / unit: Mass, volume, or count / kg, m3, or item
• Amount rule: measured reject mass or count, wastewater volume, used packaging mass, 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
• Range: Provisional pack-out waste screening estimate
  • Range role: Default estimate (default_estimate)
  • Lower: 0
  • Upper: 2
  • Unit: kg waste/kg marketable product
  • Basis: broad first-pass reject, wastewater solids, and used packaging mass
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Elementary flows

No default elementary flow is specified for final handling. Add refrigerant losses, wastewater emissions, or direct air emissions when measured or required by study scope.

Outputs

Product flows

Marketable farmed Homarus lobster reference product (marketable_farmed_homarus_lobster_reference_product)

This output is the PCR reference product released at the declared gate.

• Selected flow: Farmed lobsters (Homarus spp.), live, fresh or chilled 9dca0441-44a0-496b-8f6d-f2aeb7db063f
• Flow property / unit: Mass / kg
• Amount rule: measured net marketable live, fresh, or chilled product mass after grading and pack-out
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: 1 kg reference product
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_harvest_and_product_mass_records
• Range: Reference flow identity
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 1
  • Upper: 1
  • Unit: kg/kg reference product
  • Basis: PCR reference flow
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Method formula (method_formula)
  • Sources: asc-farm-standard-2025

Process: Delivery to Declared Gate (delivery_to_declared_gate)

Inputs

Product flows

Delivery fuel, electricity, refrigerant service, and live transport supplies (delivery_fuel_energy_and_live_transport_supplies)

This row records delivery fuel, electricity, refrigerant service, ice, oxygen, water, packaging supplements, or other live transport supplies when the declared gate is beyond farm or packhouse release.

• Selected flow: Diesel oil 9d258d75-6792-4f1c-9856-81602ed8f816; electricity, ice, oxygen, water, refrigerant, or transport service selected from route records
• Flow property / unit: Fuel, energy, mass, volume, or transport service / L, kg, kWh, MJ, m3, or tonne-km
• Amount rule: route-specific measured fuel, energy, transport service, or supply use with distance, load factor, live transport condition, and allocation basis retained
• Value mode: Foreground record (foreground_record)
• Specificity: Route-specific (route_specific)
• Normalization basis: per delivered 1,000 kg reference product or tonne-km where transport is modelled as service
• Basis kind: Transport service (transport_service)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_delivery_and_route_records
• Range: Provisional delivery screening estimate
  • Range role: Default estimate (default_estimate)
  • Lower: 0
  • Upper: 5000
  • Unit: tonne-km/1,000 kg delivered product
  • Basis: broad first-pass delivery transport service
  • Basis kind: Transport service (transport_service)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Waste flows

Delivery mortalities, rejected product, and transport residue (delivery_mortalities_rejected_product_and_transport_residue)

This row records live-transport mortalities, rejected product, spilled ice or water residues, and damaged packaging when delivery is in scope.

• Selected flow: Sludge 725c8f6e-7975-4155-a250-1f95ef70c508; lobster mortality, rejected product, and transport residue selected from site records
• Flow property / unit: Mass, volume, or count / kg, m3, or item
• Amount rule: measured delivery loss, mortality count, reject mass, residue amount, and disposal or recovery route
• Value mode: Foreground record (foreground_record)
• Specificity: Route-specific (route_specific)
• Normalization basis: per delivered 1,000 kg reference product
• Basis kind: Transport service (transport_service)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_delivery_and_route_records
• Range: Provisional delivery loss screening estimate
  • Range role: Default estimate (default_estimate)
  • Lower: 0
  • Upper: 0.5
  • Unit: kg loss/kg delivered product
  • Basis: broad first-pass route loss relative to delivered product
  • Basis kind: Transport service (transport_service)
  • Evidence kind: Reasoned estimate (reasoned_estimate)

Elementary flows

No default elementary flow is specified for delivery. Add direct vehicle emissions only when the selected modelling approach records elementary emissions in the foreground rather than through an upstream fuel or transport process.

Outputs

Product flows

Delivered farmed Homarus lobster (delivered_farmed_homarus_lobster)

This output records delivered reference product only when the declared gate is a customer, market, airport, live seafood hub, or other off-site gate.

• Selected flow: Farmed lobsters (Homarus spp.), live, fresh or chilled 9dca0441-44a0-496b-8f6d-f2aeb7db063f
• Flow property / unit: Mass / kg
• Amount rule: delivered net marketable mass at declared gate
• Value mode: Foreground record (foreground_record)
• Specificity: Route-specific (route_specific)
• Normalization basis: delivered product quantity
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_delivery_and_route_records
• Range: Delivery mass-balance QA guardrail
  • Range role: QA guardrail (qa_guardrail)
  • Lower: 0
  • Upper: 1
  • Unit: kg/kg packed product loaded for delivery
  • Basis: delivered product fraction after route losses
  • Basis kind: Reference flow (reference_flow)
  • Evidence kind: Method formula (method_formula)
  • Sources: asc-farm-standard-2025

7. Allocation and Co-product Handling

Avoid allocation where feasible by collecting separate batch, pond, tank, container, compartment, holding, and pack-out records. When the same foreground system produces multiple saleable species, size grades, seed, juveniles, market lobsters, shells, molts, or other products, apply the hierarchy below:

1. Use physical subdivision when records identify separate culture units, batches, species, size grades, or handling lots.
2. Use causal physical allocation when resource use is driven by measured biomass, count, compartment occupancy, feed intake, water volume, holding duration, tonne-kilometres, or live-tank service.
3. Use economic allocation only when physical subdivision and causal physical allocation are not possible; disclose prices, period, market, and sensitivity.
4. Treat mortalities, culls, molts, wastewater, sludge, and used packaging as waste unless they leave the system as saleable co-products with documented market value and handling.

Wild Homarus lobsters, farmed rock lobster and other sea crawfish, farmed Norway lobsters, and processed lobster products must be separated into their own PCR categories or modelled as co-products with explicit classification disclosure.

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	biological starting stock, accepted stock, stocking, transfers	hatchery logs, supplier invoices, movement permits, batch records	species, life stage, source, batch id, count, mass where available, mean size, health status, movement date, accepted count, rejected count	collect from hatchery, nursery, supplier, stocking, and transfer records	kg, item, egg count, larval count, juvenile count	each batch or transfer	full production batch or reporting period	all biological stock entering the declared production route	sum accepted stock and losses by species, life stage, and batch before normalization to reference product	supplier document, hatchery log, health certificate, movement permit, count or weighing record
cp_feed_records	broodstock_hatchery_nursery_and_stocking; growout_and_husbandry	feed, bait, live feed, natural-feed claim	feed invoices, recipes, feeding logs, compartment records	feed type, supplier, batch, wet/dry/as-fed basis, live-feed counts, quantity, feeding date, target life stage, zero-added-feed evidence where claimed	collect from invoices, hatchery recipes, feed logs, and grow-out records	kg, g, L, item, cyst count, compartment-month	each feeding event or batch summary	full production batch or reporting period	all feed and natural-feed evidence for included production units	aggregate by feed type and basis, convert only with measured moisture or supplier data	invoice, recipe, feed log, natural-feed system record, mass or count measurement
cp_water_temperature_salinity_and_discharge_records	all foreground processes	water, temperature, salinity, discharge, direct releases, escapes	water meter, pump log, salinity and temperature records, water-quality tests, discharge records, escape logs	intake volume, exchange volume, recirculation, temperature, salinity, dissolved oxygen where measured, effluent volume, nutrient or solids concentration, escape count	collect from meters, monitoring logs, laboratory tests, and incident records	m3, kg, deg C, ppt, mg/L, kg load, item	at least per batch and when discharge or escape events occur	full production batch or reporting period	all controlled water systems and direct releases	normalize intake, discharge, and calculated loads to reference product; retain salinity and temperature basis	meter records, monitoring sheets, lab reports, incident reports
cp_energy_and_fuel_records	all foreground processes	electricity, fuel, temperature control, vessel work, equipment	meter readings, invoices, vessel logs, fuel receipts, allocation records	energy carrier, quantity, meter id, equipment or process, date, allocation key, vessel trip, refrigeration or oxygenation link	collect from meters, invoices, fuel logs, and allocation worksheets	kWh, MJ, L, kg	monthly, per batch, or per trip	full production batch or reporting period	all energy and fuel used by included processes	allocate by direct meter first, then equipment hours, biomass, compartment service, or batch duration	meter record, invoice, fuel receipt, vessel or equipment log
cp_treatment_biosecurity_and_health_records	growout_and_husbandry	health, disinfectant, treatment, biosecurity	treatment logs, veterinary records, chemical invoices, health plans	product name, active ingredient, dose, quantity, target unit, diagnosis or reason, legal status, date, withdrawal or harvest eligibility	collect from treatment records, prescriptions, health plans, and invoices	kg, L, g active ingredient, m3 gas	each treatment event	full production batch or reporting period	all included culture units and holding systems	aggregate by product and active ingredient, retain event purpose and legal status	treatment log, health plan, veterinary record, invoice
cp_mortality_molt_residue_and_sludge_records	all foreground processes	mortality, molts, shells, sludge, culls, residues, rejects	mortality logs, grading records, cleaning logs, waste transfer notes	count, mass, life stage, process, reason, disposal route, recovery route, date	collect from mortality, cleaning, grading, and waste records	kg, item, m3	each event or batch summary	full production batch or reporting period	all included production and handling units	sum by residue type and route; calculate loss fraction against accepted or marketable mass	mortality log, waste note, weighing record, disposal certificate
cp_harvest_and_product_mass_records	growout_and_husbandry; harvest_live_holding_chilling_and_packout	harvest-size output, reference product, product grade	harvest records, grading logs, sales records, packing records	harvest date, species, count, net mass, size grade, product state, mortality, culls, packed mass, gate	collect from harvest weighing, grading, packing, and sales records	kg, item, count per kg	each harvest or packing lot	full production batch or reporting period	all product lots included in the reference flow	reconcile harvested, packed, rejected, and delivered mass before normalization	scale ticket, packing record, sales note, batch reconciliation
cp_packaging_live_holding_and_chilling_records	harvest_live_holding_chilling_and_packout	packaging, holding water, ice, oxygen, live transport preparation	packaging inventory, live tank logs, ice logs, oxygen logs	material type, item count, mass, reuse rate, water volume, oxygen quantity, ice mass, holding duration	collect from inventory, tank logs, and pack-out records	kg, item, m3, L, m3 gas, hour	each pack-out lot	full production batch or reporting period	all final handling and pack-out activities	allocate by product lot mass, holding duration, or direct issue record	inventory issue, live tank log, weighing record, oxygen invoice
cp_delivery_and_route_records	delivery_to_declared_gate	delivery transport and route losses	delivery log, vehicle record, fuel receipt, customer receipt	origin, destination, distance, product mass, vehicle or service, fuel, electricity, ice, oxygen, delivery condition, loss count or mass	collect from delivery, vehicle, freight, and receipt records	km, tonne-km, L, kg, kWh, item	each delivery route	deliveries within reporting period	all delivery routes included in the declared gate	calculate tonne-km or direct route inventory and normalize to delivered mass	route log, fuel receipt, freight invoice, delivery receipt

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
calc_reference_product_mass	reference product	net marketable product mass = packed or delivered acceptable mass minus rejects and mortalities within the declared product boundary	cp_harvest_and_product_mass_records; cp_packaging_live_holding_and_chilling_records; cp_delivery_and_route_records when delivery is included	kg reference product
calc_count_to_mass	count-based records	mass = count x measured mean individual mass, or count / measured count per kg; retain sampling method and grade	cp_biological_stocking_records; cp_harvest_and_product_mass_records	kg equivalent mass
calc_stock_acceptance_and_survival	biological stock and grow-out	accepted or surviving fraction = accepted or surviving count or biomass divided by input count or biomass for the same life stage and batch	cp_biological_stocking_records; cp_mortality_molt_residue_and_sludge_records; cp_harvest_and_product_mass_records	accepted stock, survival, loss, and residue indicators	noaa-field-growout-lobster-2013; dtu-european-lobster-larvae-2023
calc_waterborne_load	discharge and direct releases	load = discharge volume x measured concentration, adjusted for units and background where documented	cp_water_temperature_salinity_and_discharge_records	kg nutrient, solids, treatment residue, or other load	asc-farm-standard-2025
calc_energy_allocation	shared energy systems	allocate direct meters first; otherwise allocate by equipment hours, batch duration, water volume, compartment occupancy, or product mass with the selected key disclosed	cp_energy_and_fuel_records; cp_harvest_and_product_mass_records	kWh, MJ, or fuel per reference flow	asc-farm-standard-2025
calc_delivery_transport_service	delivery	tonne-km = delivered product mass in tonnes x route distance in km; route-specific fuel may replace tonne-km where direct records are available	cp_delivery_and_route_records	tonne-km or direct delivery inventory per reference flow

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
dq_species_and_category_identity	all datasets	Dataset must identify Homarus species and show that the reference product belongs to CPC 04332, not wild Homarus, rock lobster, Norway lobster, or processed lobster categories.	species records, classification mapping, product description, sales record
dq_farmed_proof	all datasets	Dataset must prove controlled aquaculture production through hatchery, nursery, grow-out, sea-based container, ranching, or enhancement records.	stocking log, hatchery record, grow-out record, permit, production plan
dq_mass_balance	biological stock, harvest, reference product	Biological input, mortality, cull, residue, harvest, packed, and delivered product records must reconcile at batch or reporting-period level.	batch reconciliation, scale tickets, mortality logs, packing records
dq_water_and_energy_completeness	water, discharge, energy, fuel	Water, temperature, salinity, discharge, electricity, fuel, oxygenation, and temperature-control records must cover all foreground processes in scope.	meter logs, invoices, monitoring records, allocation worksheet
dq_treatment_and_biosecurity_traceability	health and treatment inputs	Treatments, disinfectants, anesthetics, oxygen, salt, and water-quality inputs must retain purpose, active ingredient where applicable, legal status, and harvest eligibility consequence.	treatment log, health plan, veterinary record
dq_live_product_handling	final product and delivery	Live holding, chilling, packaging, delivery duration, and mortality or rejection must be traceable to the final product lot.	live tank log, pack-out record, delivery receipt
dq_unresolved_uuid_disclosure	any row with site-specific flow selection	Any blank or generic flow identity must be disclosed before reviewed publication and replaced with selected Tiangong UUIDs where available.	manifest review metadata, UUID review record

9. Validation Rules

validation_id	Severity	Rule
val_reference_flow_uuid	error	The reference product flow must use 9dca0441-44a0-496b-8f6d-f2aeb7db063f unless an approved Tiangong replacement is recorded with the same CPC 04332 meaning.
val_reference_unit	error	The reference amount must be expressed as kg with Mass 93a60a56-a3c8-11da-a746-0800200b9a66 and Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66.
val_farmed_not_wild	error	A dataset based only on wild capture, wild landing, or post-capture live holding without controlled aquaculture production is non-conforming.
val_adjacent_lobster_categories	error	Rock lobster and other sea crawfish, Norway lobster, and processed lobster products must not be reported under this PCR as the main reference product.
val_required_qualifiers	error	Species, culture system, biological starting condition, product state, size grade or count basis, declared gate, and farmed proof must be present.
val_collection_protocol_coverage	error	Each foreground inventory row with foreground_record or calculated_value must link to a collection protocol or calculation rule.
val_mass_balance	warning	Biological stock, mortality, residue, harvest, packed, rejected, and delivered mass should reconcile; unexplained imbalance must be disclosed.
val_range_review	warning	Reasoned-estimate ranges are candidate QA screens and must be replaced or justified before reviewed or published use.

10. Published Dataset Profile

Field	Value
dataset_role	foreground production dataset for farmed Homarus lobster
downstream_use	secondary_dataset; background_dataset when reviewed and geographically representative
allowed_use	LCA modelling of live, fresh, or chilled farmed Homarus lobster at the declared gate with disclosed production route, product state, and quality qualifiers
excluded_use	wild Homarus lobster; rock lobster and other sea crawfish; Norway lobster; frozen, dried, salted, brined, cooked, canned, meat-only, prepared, or preserved lobster; seed-only production; shell, molt, or residue co-products without separate modelling
required_metadata	canonical PCR id; CPC code; species; culture system; biological starting condition; farmed production evidence; product form; size grade; mass basis; water temperature and salinity basis; feed regime or natural-feed claim; health and treatment disclosure; packaging state; declared gate; geography; reporting period; allocation method; unresolved UUID substitutions
required_quality_disclosure	source and completeness of biological stock, feed, water, energy, health treatment, mortality, residue, product mass, packaging, delivery, and allocation records; reasoned-estimate range use; missing Tiangong UUIDs; deviations from the default boundary
update_trigger	update when Tiangong flow identities change, CPC mapping changes, reviewed Homarus aquaculture evidence becomes available, source-backed ranges replace candidate estimates, or production route changes materially

11. Data Sources

Source id	Type	Reference	Used for
noaa-homarid-hatcheries-1999	literature	Nicosia, F. and Lavalli, K. 1999. Homarid Lobster Hatcheries: Their History and Role in Research, Management, and Aquaculture. Marine Fisheries Review 61(2). https://spo.nmfs.noaa.gov/sites/default/files/pdf-content/mfr6121_0.pdf	Homarus hatchery scope, life-stage identity, and culture route evidence
dtu-european-lobster-larvae-2023	literature	DTU Aqua Report No. 426-2023. Rearing and production of European lobster (Homarus gammarus) larvae and postlarvae. https://www.aqua.dtu.dk/-/media/institutter/aqua/publikationer/rapporter-401-450/426-2023-rearing-and-production-of-european-lobster-larvae-and-postlarvae.pdf	larval and postlarval rearing, live feed, temperature, survival, and hatchery collection rules
noaa-field-growout-lobster-2013	dataset	NOAA InPort. Field Grow-out of Juvenile American Lobsters in Long Island Sound. https://www.fisheries.noaa.gov/inport/item/26591	juvenile grow-out, survival, size monitoring, and natural-feed system evidence
vliz-sea-based-container-culture-2022	literature	Hinchcliffe, C. et al. 2022. Low-impact rearing of a commercially valuable shellfish: sea-based container culture of European lobster Homarus gammarus in the United Kingdom. https://www.vliz.be/imisdocs/publications/392746.pdf	sea-based container culture boundary, natural-feed claim, benthic and water-quality considerations
asc-farm-standard-2025	standard	Aquaculture Stewardship Council. ASC Farm Standard, ASC-STD-001, Version 1.0.1, 2025. https://programme-centre.asc-aqua.org/app/uploads/2025/08/ASC-STD-001-ASC-Farm-Standard-V1.0.1-Aug-2025.pdf	aquaculture data quality, environmental stewardship, water quality, energy, feed, health, welfare, escapes, biosolids, and certification-related collection rules
noaa-american-lobster-species	official_guidance	NOAA Fisheries. American Lobster species profile. https://www.fisheries.noaa.gov/species/american-lobster	Homarus habitat and product identity context for culture-system disclosure