Blar i Published in cooperation with others på forfatter "Otterå, Håkon"
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Comparative growth and survival of two genetic strains of Atlantic cod (Gadus morhua L.) reared through the early life stages in a marine pond in western Norway
Blom, Geir; Svåsand, Terje; Jørstad, Knut Eirik; Otterå, Håkon; Paulsen, Ole Ingar; Holm, Jens Christian (ICES CM Documents;1990/F:48, Working paper, 1990)The investigation was carried out in a marine pond in western Norway during spring and summer 1990. Two genetic defined strains of Atlantic cod (Gadus morhua L.) were used as broodstocks. A total of 11.1 x 10^6 cod larvae ... -
Demonstration of maternal effects of Atlantic cod: Combining the use of unique mesocosm and novel molecular techniques – A new EU-project
Svåsand, Terje; Ajiad, Adnan Mosa; Dahle, Geir; Jakobsen, Tore; Kjesbu, Olav Sigurd; Moksness, Erlend; Otterå, Håkon; Solemdal, Per; Thorsen, Anders (ICES CM documents, Working paper, 2000)One of the effects of fishing is a reduction in average age and size in exploited fish stocks, leading to an increasing proportion of recruit spawners in the stock. Current management practice assumes equal viability of ... -
Intensive production of cod fry at Austevoll. Final report.
Huse, Ingvar; Jensen, Per Anders; Opstad, Ingegjerd; Otterå, Håkon; Strand, Bernt (ICES CM Documents;1984/F:33, Working paper, 1984)The experiences of this final season of the intensive cod fry production experiment are summed up. The brood stock yielded 369 liters of cod eggs. The production experiment in plastic pens had very high survival, but ... -
Measurements of condition and growth of cod larvae reared in mesocosms: individual variability as a function of environmental condition or genetic inheritance
Clemmesen, Catriona; Bühler, Vivian; Carvalho, Gary R.; Chase, R.; Evans, Geoffrey T.; Hauser, Lorenz; Hutchinson, William F.; Mempel, Helgi; Moksness, Erlend; Otterå, Håkon; Paulsen, Helge; Svåsand, Terje (ICES CM Documents;2001/V:8, Working paper, 2001)Size, dry weight and RNA/DNA measurements of 3876 cod larvae from 26 different families of recruit and repeat spawners reared in two mesocosms ( 2500m³ and 4400m³) under natural conditions were analysed. To be able to ... -
The use of genetic tagging to study interaction between farmed and wild atlantic cod stocks
Jørstad, Knut Eirik; van der Meeren, Terje; Dahle, Geir; Paulsen, Ole Ingar; Svåsand, Terje; Otterå, Håkon (ICES CM documents;2009/Q:12, Working paper, 2009)Escapement of farmed fish from the aquaculture is considered as a risk for negative genetic impacts on native gene pools. In order to investigate potential interbreeding between cultured and wild Atlantic cod, Gadus ... -
Weaning trials with cod fry on artificial diets
Otterå, Håkon; Lie, Øyvind (ICES CM Documents;1990/F:47, Working paper, 1990)Three experiments with different size groups of cod fry, 13, 49 and 465 mg wet-weight were offered 6 different artificial diets. The experiments lasted for 28 days. Growth, and for the medium size-group chemical composition ...