Year: 1991
Type: report
Abstract: For several decades one of the prime targets within fishery science has\nbeen to be able to understand and explain the great variability in the\nsuccess of survival from egg to mature fish. One of the reasons why such\neffort has not lead to any clear and quantifiable conclusions, is probably\nthat the direct and indirect influence of the physical climate has so far\nbeen underestimated.\n22 years of hydrographic data taken during summer over most of the\nnorthern and central North Sea, and meteorological data from a station\noutside western Norway, have been used to derive climatic parameters\nassumed to be of prime importance for the biological productivity of the\nNorth Sea. These time-series together with recruitment and spawning\nstock size data from the indiuidual ICES working groups, have been used to\nconstruct empirical models demonstrating that e.g. more than 70% of the\nyear to year recruitment variability of several of the fish stocks may be\nexplained by the climate/weather prior to and during the time of larval\nstages.\nIn addition to demonstrate which climatic factors being most\nimportant for the biological prosesses, the results of the models indicate\nthat realistic forecasts of recruitment can be given already within the\nsummer of the spawning year. This possibility is of great importance to\nbetter manage the fish resources.
Language: English
Subfield: Aquatic Science
Domain: Life Sciences
Open Access status: green
OpenAlex ID: W2464343957