Acronym BENCHMARK II
Category
Aquaculture
Title Importance of timing and length of winter signal in RAS for performance at sea when releasing large post smolt Programme National Programme
Instrument (FP6)
Contact Type (FP7)
Strand (Interreg)
NA
Theme (FP7)
Activity Area (FP6)
Regional Area (Interreg)
Action (COST)
NA
Specific Programme (FP7)
NA
Funding source National Coordinator Trine Ytrestøyl Coordinator email trine.ytrestøyl@nofima.no
Coordinator institution
NOFIMA - Norwegian Institute of Food, Fisheries and Aquaculture Research (Norway)
Institutions involved
NA - Bremnes Seashore AS
(Norway) ,
NA - Grieg Seafood ASA
(Norway) ,
NA - Lerøy Norway Seafoods AS (Norway) ,
UiT - The Arctic University of Norway (Norway) ,
UiB - University of Bergen (Norway) ,
Start year 2021 End year 2023 Funding (€) € 338,250 Website https://www.fhf.no/prosjekter/prosjektbasen/901682/ Summary Production of hatchery salmon is in a phase where major changes are continuously taking place, and the industry has a great interest in keeping the salmon in closed facilities in order to be able to reduce the time spent in traditional open facilities at sea and thereby avoid problems with salmon lice and disease. The industry currently uses several different strategies for large hatchery fish in RAS (recirculating aquaculture systems), such as winter signal/non-winter signal, use of brackish water or release directly from fresh water to sea for different fish sizes. However, these strategies are to a small extent based on actual findings from controlled trials, and most trials that have not been carried out have been of short duration and used small smolt. In the industry, there are indications of variable performance after seawater transfer of large smolt, which was also shown in a previous experiment, where fish released at 600 grams had poorer growth in the sea phase compared to fish released at 100 and 200 grams. This was mainly due to poorer growth during the summer in the sea phase, 6–8 months after exposure to sea. If it is to be profitable to release large smolt into the sea, the problems of unpredictable and poor growth must be solved. In this project, several production protocols in RAS will be tested with regard to performance at sea up to slaughter size.
Main objective:
To investigate the importance of the timing and length of a winter signal with short days (12 hours light : 12 hours dark) in RAS for performance in the sea for salmon released at different sizes. The project will emphasize the following parameters: Growth in sea phase/produced biomass (JEA index), survival, sexual maturation, immunology and quality at slaughter (colour, texture, vaccine damage, deformities).
Keywords
Growth rate;
Fish biology;
Cage aquaculture;
Open sea aquaculture;
Fish;
Fish quality;
Salmon;
Land-based aquaculture;
Recirculating systems;
Marine Region
76
Not associated to marine areas
0
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