Fish farm monitoring in Scotland

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Fish farm monitoring in Scotland. Scotland Norway MOU Committee 29 March 2011 Edinburgh. Douglas Sinclair, Specialist Scottish Environment Protection Agency. Contents. Why How Where When. Why do we monitor fish farms. - PowerPoint PPT Presentation

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  • Fish farm monitoring in ScotlandScotland Norway MOU Committee29 March 2011Edinburgh

    Douglas Sinclair, SpecialistScottish Environment Protection Agency

  • ContentsWhy

    How

    Where

    When

  • Why do we monitor fish farmsCredible regulatory regimes must be supported by monitoring or inspectionThere is an expectation that polluters are checkedBeyond the philosophical need for monitoringLegislation, EU, UK and Scots imposes requirements.EU WFD broad monitoring principlesDeveloped by Water Environment Water Services (Scotland) Act 2003 and other legislation Environment Act 1995Implemented in programmes developed by SEPA under the Water Environment (Controlled Activities) Scotland Regs 2005known as CAR.

  • Why do we monitor fish farmsMonitoring programmes are risk basedFish farm discharges are relatively high riskPopulation equivalent Containing pesticidesClose to other users interestsOften close to Natural HeritagePotential for cumulative effects

    Benthic monitoring at fish farms is therefore justified

  • Zostera marina (Kircubbin Bay)

    Zostera marina (subtidal) perennial

    Zostera marina Subtidal widespread northern hemisphere affected by the wasting disease in the 1930s. Essentially subtidal on Strangford Lough at present.

  • How do we monitor fish farmsSEPA has evolved a well defined and developed monitoring approachOriginated from work done in the early 1990s in Shetland which was based on: Annual surveysSingle photographic transectMonitoring approach is variable sometimes photographs or video are still used But in most cases monitoring is now based upon benthic sediment studies

  • How do we monitor fish farmsBenthicUsually minimum requirement for any site3 types of surveyAssessed for biological Animal speciesAbundanceCommunity structureand physio-chemical impactsMetalsCarbonSea lice meds residues

    VisualAlternative if substrate unsuitable ie rockySee key species and habitatsAbundance frequencySubstrate typeCan be video or stillsMay be required for CAR applicationsSuitable for planning, EIA etc.Sometimes both are required

  • How do we monitor fish farmsParameters are assessed against published standards Farms are classified as:

    SATISFACTORY pass the standardsBORDERLINE failure of one or two standards or a number of standards are close to the fail threshold. This is technically still a satisfactory outcome but highlights stress on the sea bed UNSATISFACTORY failure of quality standards

    So that is how we monitor the benthos, where do we undertake this monitoring

  • Where do we monitor fish farmsWhere to judge impacts has also evolved over the yearsSEPA used to assess effects of farms based on a fixed impact zone - AZE.System now more sophisticated, based on model outputsGiving a site specific impact footprint

  • Where do we monitor fish farmsMonitoring undertaken on pre-determined transectStations close to farm plus referenceGrey shading = limit of AZE

  • Where do we monitor fish farmsIn addition to monitoring at fish farm sites, monitoring is undertaken in waterbodies for WFD purposesCheck overall waterbody statusExamines wider range of parameters Nutrients in water columnMacroalgaePlankton

  • Where do we monitor fish farmsCSTT ZonesZone A Near fieldZone B Far field

  • Where do we monitor fish farmsIn addition to monitoring at fish farm sites, monitoring is undertaken in waterbodies for WFD purposesCheck overall waterbody statusExamines wider range of parameters Nutrients in water columnMacroalgaePlankton

    When does this monitoring occur

  • When do we monitor fish farmsTwo strategies, one for routine benthic surveys, one for sea lice medicine residuesBenthic impacts monitoring used to be annualSEPA relaxed requirements to: once per growth cyclein the summer of 2nd year of productionat the time of peak biomass

  • When do we monitor fish farmsSea lice medicine residues, monitored at time of peak sediment concentrationSo, for example for Slice:Peak concentration in sediment is at 118 days post treatmentMonitoring used to be required 110-130 days post treatmentNow relaxed to 80 -169 days post treatment

  • Site Residual Curves90 daysampling window

    Calicide EQS Test - Code

    Time stepChem fdChem faeMed feedSolids fdSolids faeTotal solidsCum at end of periodTotal chemCum at end of periodNoFeed waste3%

    mg/d/farmmg/d/farmkg/d/farmkg/d/farmkg/d/farmkg/farmkg/farmmg/farmmg/farmdaysDig85%

    1 to 168Days 1-70.0000.0000.00.00.00.00.00.0(equal to E23)0.07Water con9%

    169 to 1032Days 8-430.0000.0000.00.00.00.00.00.0(equal to D27)0.036

    1033 to 1896Days 44-790.0000.0000.00.00.00.00.00.0(equal to D34)0.036Dose0.05mg/kg

    1897 to 2760Days 80-1150.0000.0000.00.00.00.00.00.0(on Load Calc.)0.036Conc food10mg/kg

    2761 to 3624Days 116-1510.0000.0000.00.00.00.00.00.00.036

    3625 to 4488Days 152-1870.0000.0000.00.00.00.00.00.00.036

    4489 to 5352Days 188-2230.0000.0000.00.00.00.00.00.00.036

    0.00.0

    Total Emamectin Applied to Farm =0.000g

    % of Emamectin Applied Which is Released Over 223 days =0.0%

    Particle mass assigned assuming Number of particles is n and no fractionation of fd/fae in settling velocity dialog

    SolidsmgChemugNo.of cages--->20number of particles (n) =5

    FdFaeFdFae

    Days 1-700000N.B. Ensure that the particle mass does not reach a value where mass will be lost as a result

    Days 8-4300000of integer rounding. This can happen when modelling low biomass and/or using high particle numbers.

    Days 44-7900000There is a failsafe built into the model to try to account for this factor. However, it is advisable to use the calculation

    Days 80-11500000here to assess the risk of this error.

    Days 116-15100000

    Days 152-18700000

    Days 188-22300000

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