Blar i ICES CM documents authored by IMR scientists (1949-2011) på forfatter "Marshall, C. Tara"
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Abundance and mortality of Northeast Arctic cod and haddock during their first years of life
Bogstad, Bjarte; Nakken, Odd; Eriksen, Elena; Marshall, C. Tara (ICES CM Documents;2010/C:04, Working paper, 2010)For Northeast Arctic cod and haddock in the Barents Sea, long time series of year-class abundance are available at several stages before they recruit to the fishery, i. e. before they reach age 3. Several studies have ... -
Condition and size composition effects on the simulated relationship between spawner biomass and total egg production for Northeast Arctic cod (Gadus morhua L.)
Kvalsund, Merete; Marshall, C. Tara (ICES CM Documents;1999/Y:6, Working paper, 1999)Spawner biomass (SB) is often assumed to be proportional to total egg production (TEP) by fish stocks. Recent studies suggest that this assumption may not be valid, particularly when the physiological condition of fish ... -
Evaluating the effectiveness of biological reference points in conserving reproductive potential
Marshall, C. Tara; Yaragina, Natalia A.; Thorsen, Anders (ICES CM documents, Working paper, 2001) -
An evaluation of recruitment indices for Northeast Arctic cod (Gadus morhua L.)
Helle, Kristin; Bogstad, Bjarte; Marshall, C. Tara; Michalsen, Kathrine; Ottersen, Geir; Pennington, Michael (ICES CM documents, Working paper, 1999)Indices of the abundance of Northeast Arctic cod (Gadus morhua L.) for various life stages were compared in order to determine the earliest stage at .which year-class strength is established. The indices considered are: ... -
Interannual variations in the liver condition index of cod as an indicator of temperature and feeding conditions in the Barents Sea
Yaragina, Natalia A.; Marshall, C. Tara (ICES CM Documents;2001/V:31, Working paper, 2001)Background: Northeast Arctic cod, inhabiting the edge of the species area, experience variable environmental conditions and feeding resources, one of the main of them is capelin. Lipids are an important biochemical link ... -
Spawner quality effects on two measures of reproductive potential: have we been counting our eggs before they've hatched?
Marshall, C. Tara; Kjesbu, Olav Sigurd; Thorsen, Anders; Solemdal, Per (ICES CM documents, Working paper, 1999)Recent studies have found positive associations between recruitment and indices of spawner quality (condition) for stocks exhibiting an indeterminate relationship between recruitment and spawner biomass. This suggests ... -
Systematic bias in estimates of reproductive potential of cod stocks: implications for stock/recruit theory and management
Marshall, C. Tara; Needle, Coby L.; Thorsen, Anders; Kjesbu, Olav Sigurd; Yaragina, Natalia A. (ICES CM documents, Working paper, 2005)Stock/recruit relationships, describing the relationship between the parental population and the number of offspring produced, are a central tool in population ecology. For fish populations the stock/recruit relationship ...