Impact Of Chronic Hypoxia On Food Ingestion, Growth And Condition Of Atlantic Cod, Gadus Morhua ...

• Main Authors: Chabot, Denis, Dutil, Jean-Denis, Couturier, Christine
• Format: Conference Object
• Language: unknown
• Published: ASC 2001 - V - Theme session 2024
• Subjects: Fisheries and aquaculture; ICES resources; Canada; atlantic cod; Gadus morhua
• Online Access: https://dx.doi.org/10.17895/ices.pub.25636275.v1; https://ices-library.figshare.com/articles/conference_contribution/Impact_Of_Chronic_Hypoxia_On_Food_Ingestion_Growth_And_Condition_Of_Atlantic_Cod_Gadus_Morhua/25636275/1

No abstracts are to be cited without prior reference to the author.The Gulf of St Lawrence is an enclosed sea located in Eastern Canada. It is characterised by the presence year-round of a layer of cold water (temperature < 0 °C and average salinity = 32.4) (Lauzier & Trites, 1958; Gilbert & Pettigrew, 1997). In winter, the water column is a two-layer system (Koutitonsky & Bugden, 1991). The permanent cold layer mixes with surface waters via storm events and density changes of surface waters caused by cold winter air temperatures. As a result, water is below 0°C from the surface down to circa 100 m. Starting in April, the water column becomes a three-layer system, with a cold intermediate layer (CIL), due to the increasing temperature and lowering salinity of surface waters (Koutitonsky & Bugden, 1991) (Gilbert & Pettigrew, 1997). In summer, the CIL is found from circa 50 to 100 m. Both surface waters and the CIL are rich in oxygen. Waters deeper than the CIL are warmer: temperature is ...