Blar i Brage IMR på forfatter "Marteinsdottir, Gudrun"

Viser treff 1-6 av 6

    • Evaluation of genetic impact of aquaculture activities on native populations 

      Svåsand, Terje; Crosetti, Donatella; García-Vázquez, Eva; Verspoor, Eric; Bonhomme, François; Colombo, Lorenzo; Lapégue, Sylvie; Marteinsdottir, Gudrun; Olesen, Ingrid; Triantaphyllidis, Costas (ICES CM documents;2007/L:06, Working paper, 2007)
      During the past 10 years, worldwide production of farmed fish has more than doubled, with farming activities now producing half of the fish directly consumed by humans. The potential genetic effects of aquaculture on natural ...

    • Fecundity and growth of Atlantic cod (Gadus morhua L.) along a latitudinal gradient 

      Thorsen, Anders; Witthames, Peter R.; Marteinsdottir, Gudrun; Nash, Richard D.M.; Kjesbu, Olav Sigurd (Journal article; Peer reviewed, 2010-05)
      Some fish species have wide distribution areas that span very different habitats. In this investigation we have studied Atlantic cod (Gadus morhua), which is an example of such a species, to demonstrate how this may have ...

    • How variable is the fecundity within and between cod stocks? 

      Lambert, Yvan; Kjesbu, Olav Sigurd; Kraus, G.; Marteinsdottir, Gudrun; Thorsen, Anders (ICES CM documents, Working paper, 2005)
      Stock reproductive potential is determined by the number of fish at age, sex ratio, proportion of mature female at age and fecundity. Fecundity data, which are fundamental in estimating egg production are not collected ...

    • Overview of the EU fair project "STEREO" (Stock effects on recruitment relationships) 

      MacKenzie, Brian; Heath, Michael; Ådlandsvik, Bjørn; Backhaus, Jan O.; Bogstad, Bjarte; Gallego, Alejandro; Godø, Olav Rune; Gudmundsdottir, Asta; Harms, Ingo H.; Heilmann, J.P.; Jonsson, Sigurður; Kjesbu, Olav Sigurd; MacKenzie, Eddie; Marteinsdottir, Gudrun; Nielsen, Einar E.; Scott, Beth; Strugnell, G.; Stefánsson, Gunnar; Thorsen, Anders; Visser, Andre W.; Wright, Peter (ICES CM Documents;1999/Y:10, Working paper, 1999)
      The overall objective of the STEREO project is to improve the methodology for determining limit reference points for the biomass of exploited fish stocks. Limit reference points set boundaries which are intended to ...

    • Relationship between atresia, fish size and condition in Icelandic cod (Gadus morhua L.) 

      Hardardottir, Kristin; Kjesbu, Olav Sigurd; Marteinsdottir, Gudrun (ICES CM documents, Working paper, 2001)
      Cod is a determinate spawner, with a high potential fecundity. That is, a large definite number of oocytes start maturing prior to spawning. Environmental factors, such as water temperature and food availability have ...

    • Sensitivity of potential recruitment to stock structure in the presence of temporally varying survival. 

      Scott, Beth; Marteinsdottir, Gudrun; Wright, Peter; Kjesbu, Olav Sigurd (ICES CM documents, Working paper, 1999)
      In this paper we discuss the results-of a modelling study which quantifies differences in the number of potential recruits produced from a range of age-structured populations over a spawning season with temporally varying ...