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Linking water treatment practices and fish welfare

Zubiaurre, Claire and Pedersen, Lars-Flemming (2016) Linking water treatment practices and fish welfare. [Fiskevelfærd i forhold til vandbehandling.] Advocate Alliance, 21 February 2016, pp. 1-6.

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Summary

Peracetic acids can be used as sanitizers to control water quality in aquaculture systems. As an alternative to formalin, chloramine-T or copper sulphate, PAA has strong anti-microbial effects, degrades quickly and is relatively safe to use. Its mode of action and associated rapid decay can make optimizing treatment protocols a challenge. Continuous low-dose applications seem to be a promising solution. In this
preliminary study behavioral response was used to assess potential correlations with PAA dosage. A behavioral change or response is not necessarily an indication of compromised welfare.
Supportive enzymatic, biochemical and physiological biomarkers can be used along with gill
and epidermal histological measures to evaluate the effects on water treatment regimens. The ultimate
goal is to define the therapeutic window where fish welfare is not compromised.PAA is among the few disinfectants approved for organic aquaculture.

Summary translation

Pereddikesyre (PAA) produkter kan anvendes til vandrensning og kontrol af vandkvalitet i akvakultur systemer. PAA har stærk antimikrobiel effekt, det er let-nedbrydelig og relativt sikkert i brug. PAA er en stærk oxidant og ligner ozon i virkemåde og henfald. Dette kan være en udfordring i forhold til optimeret brug og den mest lovende løsning synes at være kontinuert dosering i lave doser. I dette studie blev adfærds respons undersøgt om mulig korrelation med PAA dosis. En adfærdsmæssig ændring/respons er ikke nødvendigvis en indikation af nedsat velfærd. Understøttende enzymatiske, biokemiske og fysiologiske biomarkører kan anvendes sammen med gælle- og hud-histologiske undersøgelser til at vurdere effekter af vandbehandling. Det ultimative mål er at definere det behandlingsmæssige vindue, hvor fiskevelfærd ikke forringes. PAA er på listen over godkendte hjælpestoffer til økologisk akvakultur, hvor formalin er forbudt.

EPrint Type:Newspaper or magazine article
Keywords:Animal welfare, fish behaviour, formaldehyde, PAA, peracetic acid, Rainbow trout, parasites
Subjects: Animal husbandry > Production systems
Animal husbandry > Health and welfare
Animal husbandry > Production systems > Aquaculture
Research affiliation: Denmark > Organic RDD 2 > RobustFish
Deposited By: Jokumsen, Senior Advisory Scientist Alfred
ID Code:29842
Deposited On:04 Mar 2016 11:30
Last Modified:04 Mar 2016 11:30
Document Language:English
Status:Published
Refereed:Not peer-reviewed

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