Acronym NA
Category
Marine Biotechnology
Title Farmed cod spawning in net pens: offspring recruitment under natural conditions and interbreeding with wild local stock 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 Knut Eirik Jorstad Coordinator email knut.joerstad@imr.no
Coordinator institution
IMR - Institute of Marine Research (Norway)
Institutions involved
NA
Start year 2008 End year 2011 Funding (€) € 557,621 Website https://prosjektbanken.forskningsradet.no/project/FORISS/185272?Kilde=FORISS&distribution=Ar&chart=bar&calcType=funding&Sprak=no&sortBy=date&sortOrder=desc&resultCount=30&offset=270&ProgAkt.3=HAVBRUKS-Havbruk%20-%20en%20n%C3%A6ring%20i%20vekst Summary In contrast to anadrom fish like the salmonids, Atlantic cod (Gadus morhua)is a marine species that readily spawns in the net pens. So far, control of maturation in farmed cod has been more difficult than in Atlantic salmon, and use of continuous light in the cages has only delayed maturation in cod by 3 to 5 months. Thus, the question is if cod larvae originating from spawns in net pen will survive to adulthood, mature and spawn with wild cod? This scenario opens for escapement of genetic material from selectively breed cod in captivity, with possible genetic interactions between farmed and wild cod. The project is a continuation of an ongoing study since 2006 of how spawning in net pens among farmed cod may affect the wild cod in a natural fjord system. By use of a unique genetic marker, survival, maturation, and spawning among offspring originating from spawning of farmed cod in pens have been investigated.
The main project objective was to investigate if fertilised eggs from spawning among Atlantic cod in net pens are viable and hatch into larvae that further survive to adulthood and participate in spawning with wild cod in nearby spawning grounds. This was investigated by applying a unique genetic marker with the allozyme locus GPI-1*30 which is expressed in white muscle tissue and can reliably be detected as early as the yolk sac stage in cod.
Keywords
Open sea aquaculture;
Environmental impact;
Cod;
Fish;
Cage aquaculture;
Wild animals;
Genetic;
Escapes;
Marine Region
13
Northern North Sea (27.IVa)
1
Marine Region Map
