Browsing Brage IMR by Author "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 ... -
Advice on fishing opportunities for Barents Sea capelin in 2024 — ICES subareas 1 and 2 excluding Division 2.a west of 5°W
Howell, Daniel; Nielsen, Anders; Stock, Brian; Ono, Kotaro; Clain, Laura; Fossheim, Maria; Wenneck, Thomas de Lange; Harbitz, Alf; Rodriguez, Alfonso Pérez; Iriondo, Ane; Staby, Arved; Bogstad, Bjarte; Husson, Berengere; Marshall, C. Tara; Tranang, Caroline Aas; Johannesen, Edda; Vozgirdas, Eduardas; Eriksen, Elena; Eidset, Elise; Hallfredsson, Elvar H.; Berg, Erik; Skaret, Georg; Höffle, Hannes; Jacobsen, Jan Arge; Stiansen, Jan Erik; Godiksen, Jane Aanestad; Janusz, Jerzy; Fall, Johanna Jennifer Elisabeth; Trochta, John Tyler; Gondra, Jon Ruiz (IMR/PINRO Joint Report Series, Research report, 2023) -
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 ... -
Deriving condition indices from standard fisheries databases and evaluating their sensitivity to variation in stored energy reserves
Marshall, C. Tara; Needle, Coby L.; Yaragina, Natalia A.; Ajiad, Adnan Mosa; Gusev, Evgeny (Journal article; Peer reviewed, 2004)To evaluate interstock differences in condition, it would be advantageous to develop stock-level condition indices from standardized databases on weight and length. This study describes a method for estimating stock-level ... -
Disentangling the causes of maturation trends in exploited fish populations
Marshall, C. Tara (Journal article; Peer reviewed, 2007-04-16) -
The effect of interannual variation in growth and condition on haddock recruitment
Marshall, C. Tara; Frank, Kenneth T. (Journal article; Peer reviewed, 1999)The relationship between recruitment and spawner biomass assumes that estimates of spawner biomass are proportional to total egg production by the stock. The validity of this assumption is in question for long-lived ... -
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: ... -
From reproduction to recruitment on North-East Arctic cod
Nash, Richard D.M.; Marshall, C. Tara; Yaragina, Natalia A. (IMR/PINRO Joint Report Series, Conference object, 2005) -
From reproduction to recruitment on North-East Arctic cod
Nash, Richard D.M.; Marshall, C. Tara; Yaragina, Natalia A. (IMR/PINRO Joint Report Series, Conference object, 2005) -
Implications of density-dependent juvenile growth for compensatory recruitment regulation of haddock
Marshall, C. Tara; Frank, Kenneth T. (Journal article; Peer reviewed, 1999)Data from bottom trawl surveys conducted by Canada and the United States were used to describe temporal trends in the length of haddock ages 1–4 on the southwestern Scotian Shelf (SWSS) and Bay of Fundy. From 1970 to 1995, ... -
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 ... -
Latitudinally distinct stocks of Atlantic cod face fundamentally different biophysical challenges under on-going climate change
Kjesbu, Olav Sigurd; Alix, Maud; Sandø, Anne Britt; Strand, Espen; Wright, Peter J.; Johns, David G.; Thorsen, Anders; Marshall, C. Tara; Bakkeplass, Kjell Gunnar; Vikebø, Frode Bendiksen; Myksvoll, Mari Skuggedal; Ottersen, Geir; Allan, Bridie Jean Marie; Fossheim, Maria; Stiansen, Jan Erik; Huse, Geir; Sundby, Svein (Peer reviewed; Journal article, 2023)The reproductive success of marine ectotherms is especially vulnerable in warming oceans due to alterations in adult physiology, as well as embryonic and larval survival prospects. These vital responses may, however, differ ... -
Latitudinally distinct stocks of Atlantic cod face fundamentally different biophysical challenges under on-going climate change
Kjesbu, Olav Sigurd; Alix, Maud; Sandø, Anne Britt; Strand, Espen; Wright, Peter J.; Johns, David G.; Thorsen, Anders; Marshall, C. Tara; Bakkeplass, Kjell Gunnar; Vikebø, Frode Bendiksen; Myksvoll, Mari Skuggedal; Ottersen, Geir; Allan, Bridie Jean Marie; Fossheim, Maria; Stiansen, Jan Erik; Huse, Geir; Sundby, Svein (Peer reviewed; Journal article, 2023)The reproductive success of marine ectotherms is especially vulnerable in warming oceans due to alterations in adult physiology, as well as embryonic and larval survival prospects. These vital responses may, however, differ ... -
Levermengden viser fiskebestandens rekrutteringspotensial
Marshall, C. Tara; Kjesbu, Olav Sigurd (Havforskningsnytt, Working paper, 2000) -
Norsk-Arktisk torsk: Eggmenga gir bra varsel om årsklassestyrke
Marshall, C. Tara; Kjesbu, Olav Sigurd (Havforskningsnytt, Working paper, 2002) -
Reconstructing the stock–recruit relationship for Northeast Arctic cod using a bioenergetic index of reproductive potential
Marshall, C. Tara; Yaragina, Natalia A.; Ådlandsvik, Bjørn; Dolgov, Andrey V. (Journal article; Peer reviewed, 2000)Correlation and simulation analyses suggest that, for the Northeast Arctic (NA) cod stock, the total lipid energy (TLE (kJ)) contained in the livers of mature females is proportional to total egg production, making TLE a ... -
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 an Atlantic cod (Gadus morhua) stock: implications for stock–recruit theory and management
Marshall, C. Tara; Needle, Coby L.; Thorsen, Anders; Kjesbu, Olav Sigurd; Yaragina, Natalia A. (Journal article; Peer reviewed, 2006)Stock–recruit relationships that use spawning stock biomass (SSB) to represent reproductive potential assume that the proportion of SSB composed of females and the relative fecundity (number of eggs produced per unit ... -
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 ...