CHALLENGES IN THE REARING OF EUROPEAN HAKE MERLUCCIUS MERLUCCIUS AUDREY J. GEFFEN, ANNE-LAURE GROISON, LENE KLEPPE, University of Bergen, Norway. HÉLÈNE du PONTUAL, AURELIE JOLIVET, Ifremer, STH/LASAA, Brest, France. RAGNAR SALTE, MerluNor, Brekke / Norwegian University of Life Sciences, Ås, Norway. Department of Biology Fisheries ecology and Aquaculture
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Department of Biology Fisheries ecology and Aquaculture
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CHALLENGES IN THE REARING OF EUROPEAN HAKE MERLUCCIUS
MERLUCCIUS
AUDREY J. GEFFEN, ANNE-LAURE GROISON, LENE KLEPPE, University of Bergen, Norway. HÉLÈNE du PONTUAL, AURELIE JOLIVET, Ifremer, STH/LASAA, Brest, France.
RAGNAR SALTE, MerluNor, Brekke / Norwegian University of Life Sciences, Ås, Norway.
Department of Biology
Fisheries ecology and Aquaculture
Why Hake? – Good marketing
opportunities
Interesting biology
Why in Norway? – Good technical foundation, Good access to local wild
populations
Short history of hake larval rearing 1997, 1998, 1999 - Reidun Bjelland and Anne Berit Skiftesvik
(Institute for Marine Research– Austevoll Research Station) Bjelland & Skiftesvik 2006
2005 – Anne Laure Groison (Department of Biology, UiB)– Ragnar Salte (Department of Animal and Aquacultural
Sciences, Norwegian University of Life Sciences) establishes MerluNOR and captive broodstock
2006 – Anne Laure Groison (UiB), Aurelie Jolivet
and Hélène du Pontual (Ifremer, Brest)
2007 – Natural Spawning!!!! MerluNor and Ifremer– Aurelie Jolivet and Hélène du Pontual (Ifremer, Brest)– Audrey Geffen (UiB)
2008 – Natural Spawning at MerluNOR - UiB
Status and challenges
• One captive broodstock• One instance of successful rearing• Larval rearing until 25dph, past first feeding
Technical Challenges
Biological Challenges
Photos: J. Skadal
Technical Challenge -1
Eggs have been obtained by stripping wild-caught fish
Captive spawning
Captive populations established at Brest, France and at Brekke, Norway
Egg production in both populations
Fertilized eggs leading to larvae produced by Brekke group
MerluNor – Brekke, Norway
Egg production
Captive spawning pattern compares well with field data
Spawning first observed at Brest and at Brekke in 2007
2 Females at Brekke produced 17 batches in 2007, 3 batches so far in 2008