Blar i ICES CM documents authored by IMR scientists (1949-2011) på forfatter "Dahle, Geir"
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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 ... -
Genetic assignment as a tool to identify the origin for Atlantic cod (Gadus morhua) escapees in Norwegian fjords
Dahle, Geir; Jørstad, Knut Eirik; Johansen, Torild; Westgaard, Jon-Ivar; Knutsen, Halvor; Glover, Kevin A. (ICES CM documents;2009/Q:14, Working paper, 2009) -
Screening for genetic markers to assess potential genetic impact from salmon ranching on wild stocks
Skaala, Øystein; Dahle, Geir; Taggart, John B.; Jørstad, Knut Eirik; Unneland, Laila; Karlsen, Tove; Bakke, Gunnar; Paulsen, Ole Ingar (ICES CM Documents;1991/M:14, Working paper, 1991)Genetic markers are needed to assess the potential genetic impact on wild salmon populations from ocean ranching. In 1990 spawners from four Norwegian rivers: Lone, Vosso, Dale and Onarheim were screened for genetic ... -
Size of spawning Arcto-Norwegian cod (Gadus morhua L.) and the effects on their eggs and early larvae
Solemdal, Per; Bergh, Øivind; Dahle, Geir; Falk-Petersen, Inger-Britt; Fyhn, Hans Jørgen; Grahl-Nielsen, Otto; Haaland, J.M.; Kjesbu, Olav Sigurd; Løken, Sissel; Opstad, Ingegjerd; Pedersen, Torstein; Skiftesvik, Anne Berit; Thorsen, Anders (ICES CM Documents;1993/G:41, Working paper, 1993)Using a new method for determining the stage of spawning in batch spawners, a positive correlation between the length of Arcto-Norwegian cod females, having spawned 25-75% of their eggs, and the egg diameter was established. ... -
Stock discrimination of horse mackerel (Trachurus trachurus) in the Northeast Atlantic and Mediterranean Sea: integrating the results from different stock identification approaches
Abaunza, Pablo; Murta, A.; Mattiucci, S.; Cimmaruta, R.; Nascetti, G.; Magoulas, A.; Sanjuan, A.; Comesaña, S.; MacKenzie, K.; Molloy, John; Santos, A.T.; Iversen, Svein A.; Dahle, Geir; Gordo, L.; Stransky, Christoph; Zimmermann, Christopher; Santamaria, M.T.; Ramos, P.; Quinta, R.; Pinto, A.L.; Ruggi, A.; Campbell, Neil (ICES CM Documents;2004/EE:19, Working paper, 2004)The goal of horse mackerel stock discrimination was tackled by integrating both established and innovative approaches such as genetic markers (allozymes, mtDNA, microsatellite DNA and SSCP), morphometry and parasites, ... -
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 ...