Summer Feeding of Cod (Gadus morhua) and its Relationship with Other Biological Parameters on Flemish Cap

• Main Authors: Paz, J., Casas, J. M., Pérez-Gándaras, G.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Northwest Atlantic Fisheries Organization 1991
• Subjects: Gadus morhua
• Online Access: http://hdl.handle.net/10261/84945

8 páginas, 3 figuras, 4 tablas.-- Scientific Council Meeting A ramdomly stratified bottom-trawl survey was carried out by C.E.E. on Flemish Cap (NAFO Div. 3M) in July and August 1989 and 1990. Cod stomachs were collected and studied: 1182 in 1989 and 530 in 1990. The cod were classified by age groups. In a previous paper (Paz et al. 1990) we obtained several cod feeding indices and predation on redfish was also studied. Here we analyze the empirical relatioship between the Fulness Index (F.I.) variation by age and year-class abundance variation. We also propose a model which links several biological parameters of the Flemish Cap cod population. Ingestion of Hyperidae (mainly Themisto sp.) and young redfish (Sebastes sp.) are mainly responsible for F. I. variation in all yearclasses in both years. Peer reviewed