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Indicator 4.2.3.10
Requirement
Indicator 4.2.3.7
Requirement
The UoC shall ensure that an overdose of anaesthetic is only used to kill crustaceans not destined for human consumption.
How Do I Interpret This Requirement?
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The use of anaesthesia should be considered as a humane method for crustaceans not destined to human consumption.
Evidence of Implementation
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Consideration for the use of anaesthesia for killing.
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Culling procedure.
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Records:
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Anaesthetic usage amount and number of culled crustaceans.
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Auditors Should Confirm
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The UoCs consideration of the use of anaesthetics for killing.
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Implementation can be confirmed by cross-checking the culling procedure with records, information from employee interviews and observations.
Indicator 4.2.3.6
Requirement
The UoC shall not use any of the following methods to kill crustaceans: – asphyxiation in air; or – carbon dioxide (CO2) bath; or – salt baths; or – ammonia baths; or – evisceration.
How Do I Interpret This Requirement?
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The only killing method allowed for crustaceans is a controlled ice slurry:
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This involves immersing crustaceans in a slurry of ice and water, causing rapid cooling.
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To clarify, electrical stunning is a stunning method and not a killing method. Stunning methods are designed to render animals insensible to pain before they are killed, whereas killing methods result in the animal’s death. Stunning is a preliminary step followed by a killing method to ensure that the animal does not regain consciousness.
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Evidence of Implementation
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Employees should demonstrate knowledge confirming the approved killing methods.
Auditors Should Confirm
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The use of approved methods for killing and awareness of non-approved methods.
Useful Resources
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Neil, D. M., Putyora E. & Albalat, A. (2024) Towards the humane slaughter of decapod crustaceans: identifying the most effective indicators of insensibility following electrical stunning. Frontiers in Animal Science
Indicator 4.2.3.1
Requirement
Indicator 4.2.2.10
Requirement
Indicator 4.2.2.9
Requirement
The UoC shall ensure that the HMP considers predation risks specific to the types of handling activities and shall include appropriate predator control measures.
How Do I Interpret This Requirement?
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For developing a site-specific predator control within the HMP, the UoC should consider:
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The site-specific characteristics required to be assessed by Indicator 4.2.1.8.e) predator control measures specific to the type of handling, e.g.:
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Birds scaring devices.
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Use of appropriate nets sizes while moving crustaceans from one unit/pond to another.
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Evidence of Implementation
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Predator control measures specific to the type of handling operations.
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Verification of mortalities associated with predators during handling operations.
Auditors Should Confirm
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The HMP includes the required considerations above.
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Employees are:
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Familiarised with the predator control considerations in the HMP by conducting employee interviews and observations.
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Trained on predator control verifications, e.g.:
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Verification of mortality events specific to the type of handling operations by reviewing employees’ training records, conducting employees’ interviews and observations.
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Indicator 4.2.2.8
Requirement
The UoC shall ensure that the HMP considers biosecurity risks specific to the types of handling activities and shall include appropriate biosecurity measures to prevent the transfer of disease.
How Do I Interpret This Requirement?
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For developing a site-specific biosecurity mechanism within the HMP, the UoC should consider:
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Biosecurity measures related to the type of handling, e.g.:
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Equipment segregation.
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Equipment disinfection.
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Evidence of Implementation
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For developing a site-specific biosecurity during handling the HMP includes the considerations for:
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Site-specific biosecurity mechanism.
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Biosecurity specifications related to the type of handling operations.
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Auditors Should Confirm
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The HMP includes the required minimum considerations above.
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Employees are:
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Familiarised with the biosecurity considerations in the HMP by conducting employee interviews and observations.
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Trained on biosecurity specifications related to the type of handling operations by reviewing employees’ training records, conducting employees’ interviews and observations.
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Useful Resources
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Lightner, D.V. (2007), Biosecurity in Shrimp Farming: Pathogen Exclusion through Use of SPF Stock and Routine Surveillance. Journal of the World Aquaculture Society.
Indicator 4.2.2.7
Requirement
Indicator applicability: every UoC using feed The UoC shall ensure that the HMP includes a visual inspection process to identify abnormal behaviour in relation to the handling activity and defines mitigation measures when identified.
How Do I Interpret This Requirement?
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Visual inspection after handling should be included in the HMP.
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Crustacean morphology and behaviour can be assessed when verifying the crustacean feeding trays as a minimum requirement.
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Evidence of Implementation
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The monitoring process, that incorporates the corrective actions required, included in the HMP.
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Records that confirm the monitoring of the morphology and behaviour at the feeding trays. A checked box on the monitoring records indicating whether monitoring morphology and behaviour took place or not is accepted.
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Employees should demonstrate awareness of the established behavioural monitoring process.
Auditors Should Confirm
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The monitoring process included in the HMP that incorporates corrective actions and is implemented.
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Implementation can be verified by cross-checking the process with relevant records, information from employee interviews and observations.
Indicator 4.2.2.6
Requirement
The UoC shall ensure that the HMP includes acclimatisation measures to prevent sudden changes in water conditions affecting the health and welfare status of the crustaceans.
How Do I Interpret This Requirement?
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Acclimatisation measures should be designed and maintained, e.g.:
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Water temperature during transportation must be as close as possible to that which the crustaceans came from.
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Crustaceans shall be released into a small area of the pond ‘hapa’ or net enclosures in the grow-out pond itself for a risk-assessed period to evaluate the capacity of the PL to adjust to the pond conditions.
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Evidence of Implementation
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acclimatisation measures and monitoring of the water quality according to HMP.
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Records that confirm the monitoring of acclimatisation parameters before stocking.
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Employees should demonstrate awareness of the acclimatisation measures and monitoring process above.
Auditors Should Confirm
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The acclimatisation measures included in the HMP incorporate the minimum required elements and are implemented.
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Implementation can be verified by cross-checking the process with relevant records, information from employee interviews and observations.
Indicator 4.2.2.5
Requirement
Indicator applicability: every UoC using feed The UoC shall ensure that the HMP includes a pond preparation process including at least the following: a) drying of the pond. An exception applies where areas cannot be dried, in which case they shall be disinfected; and b) removal of any dead or live animals from the pond; and c) removal of excess organic material; and d) adjustment of acidic pH; and e) preparation of the surface of earthen ponds to facilitate oxygenation and UV exposure.
How Do I Interpret This Requirement?
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Draining the pond completely helps in eliminating unwanted organisms and disease.
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Areas that cannot be completely drained should be treated with disinfectants to kill any pathogens, e.g.:
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If a few wet patches are observed after draining the pond, spray these patches with a bleach solution for disinfection, ensuring no harmful bacteria or parasites survive.
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Removing any dead or living animals helps in preventing disease spread and decay, which can affect the water quality and the health of future pond crops, e.g.:
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If a few dead crustaceans and some frogs are found, remove all these animals and dispose of them properly, ensuring the pond is free of any potential contaminants.
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Remove any organic debris such as leaves, branches and sludge. If the pond water is too acidic, agricultural lime (calcium carbonate) may be added to neutralise the pH, making the environment more suitable for crustacean e.g.:
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After removing leaves and decaying plant matter from the pond bed, the pH level was 5.5. After applying agricultural lime, the pH level rose to approximately 7, a neutral level.
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Tilling the surface of earthen ponds (those with natural soil bottoms) helps to aerate the soil, promoting better oxygenation. It also exposes the soil to sunlight, which helps in killing pathogens and breaking down organic matter through UV radiation.
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Evidence of Implementation
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Records confirming the monitoring of the required parameters for pond preparation and their conformance with acceptable quality levels included in the HMP prior to stocking.
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Record of drying period.
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Record of addition of lime if applied.
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The water quality monitoring process, that incorporates the minimum elements required for pond preparation.
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Employees should demonstrate awareness of the established water quality monitoring process during handling.
Auditors Should Confirm
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Pond preparation process, that incorporates the minimum elements required, included in the indicator and cross-checking with the handling operations present in the HMP.
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Implementation can be verified by cross-checking the process with records, information from employee interviews and observations.
Useful Resources
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The Fish Site (2016) Management of intensive Vannamei shrimp ponds. Article.
