Saison d'éclosion, croissance initiale et survie de la morue arctique (Boreogadus saida) en mer de Laptev : impact des polynies
|Abstract:||Arctic cod (Boreogadus saida) plays a crucial role in the marine Arctic ecosystem. For the first time, the hatching season, and the early growth and survival of Arctic cod are described for the Laptev Sea. The hatching season was early and long (January to July) compared to the North Water and Northeast Water Polynyas (May-June). Length at age was 4 mm longer in 2005 (a year of low ice cover) than in 2003 (heavy ice cover). Larval survival could depend mainly on ice conditions, particularly on the extent and duration of opening of winter polynyas, a key feature of the Laptev Sea that shows strong interannual variations. In particular, the absence of surviving larvae for the period of January to mid-March 2003 coincided with the absence of polynya in the study area.|
|Document Type:||Mémoire de maîtrise|
|Open Access Date:||13 April 2018|
|Collection:||Thèses et mémoires|
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