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NAERINGSPH-Nærings-phd

Effekter ved bruk av lakseferomon i kommersiell produksjon av oppdrettslaks i et fiskevelferds- og bærekraftsperspektiv.

Alternative title: Effects of using salmon pheromone in commercial salmon production from a fish welfare and sustainability perspective.

Awarded: NOK 2.4 mill.

Project Number:

323012

Application Type:

Project Period:

2021 - 2026

Funding received from:

Main objective of the research project is to document louse reducing effects of the salmon pheromone in production of farmed salmons and to improve the method for administration to the fish. Weekly louse counting on the salmons in the pens will be the most important parameter and include registration of all louse stages on the fish including presence of egg strings on female louse. Effects on fish welfare will be assessed and documented with respect to mortality and level of stress hormons. Examination of activation of mucus producing cells in the fish skin will be conducted by mucosal mapping. Several studies will be undertaken to compare fish groups with different methods for distribution of the salmon pheromone product and to compare distribution of the salmon pheromone with untreated controls. Previous trials at Prophylaxia has showed that the salmon pheromone product makes the salmon more robust against salmon louse and contributes to improved production of mucus without the need to handle the fish. These trials have contributed with important knowledge about distribution, dosing and technological challenges in sea and shown the need to apply short skirts around the pens to prevent the semiochemical to drift off.

Formålet er vise at lakseferomon reduserer stresspåvirkninger hos oppdrettslaks og gjør den mer robust med bl.a. økt slimproduksjon og bedre naturlig beskyttelse mot lakselus. De største utfordringene ved tilførsel av lakseferomonprodukt er knyttet til forhold rundt metode for optimal tilførsel og distribusjon for tilfredsstillende eksponering av biomasse. Variasjoner i feltforhold (strøm, vær, vind og temperatur) vil spille en stor rolle både for feromoneksponeringen og smittepress av lakselus.

Funding scheme:

NAERINGSPH-Nærings-phd