Abstract
Abstract
Hüssy, K. 2011. Review of western Baltic cod (Gadus morhua) recruitment dynamics. – ICES Journal of Marine Science, 68: 1459–1471. Important processes in the recruitment dynamics of western Baltic cod (Gadus morhua) are identified. Spawning areas are in the deep, saline waters below 20–40 m, depending on area topography. Spatial distribution remains relatively stable over time. Peak spawning shows an area-specific pattern, with progressively later spawning towards the east. Genetic stock structure and tagging indicate some degree of natal homing for spawning. The highly variable hydrodynamic conditions and the fact that cod eggs float in the water column cause their entrainment by currents, and their destination is determined by the prevailing winds and currents. Drift is almost exclusively to the east, but the magnitude and its impact on the structure of the affected stocks (Kattegat, western Baltic, and eastern Baltic) remains unresolved. Salinity limits the east–west exchange of eggs as a consequence of the stocks' differential requirement for neutral buoyancy. Superimposed on this, oxygen content and temperature have a significant effect on fertilization, egg/larva development, and survival. Within the Baltic Sea ecosystem, mixing of stocks may be anticipated and is particularly pronounced in the Arkona Basin because of its use for spawning by both western and eastern stocks, the advection of early life stages from the west and immigration/emigration from the east.
Publisher
Oxford University Press (OUP)
Subject
Ecology,Aquatic Science,Ecology, Evolution, Behavior and Systematics,Oceanography
Reference108 articles.
1. Effects of salinity, temperature, and dissolved oxygen on early development of the Pacific cod (Gadus macrocephalus);Alderdice;Journal of the Fisheries Research Board of Canada,1971
2. The food of adult cod (Gadus morhua L.) in the western Baltic;Arntz;Meeresforschung,1977
3. A review of fish migration patterns in the Baltic;Aro;Rapports et Procès-Verbaux des Réunions du Conseil International pour l'Exploration de la Mer,1989
Cited by
58 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献