DIGITAL.CSIC (Spanish National Research Council (CSIC)) · 1992 · 19 citations · 0 references
Life SciencesOceanographyZoologyFish EcologyMarine EcologyPopulation EcologyFish RecruitmentMarine Population DynamicsPopulation VariabilityRecruitment ProcessesStock - Recruitment RelationshipsStock-recruitment RelationshipsFish Recruitment VariabilityFish Stock-recruitment RelationshipsFisheries RecruitmentFishery Population DynamicsLarval DriftSpawning Stock-recruitment DynamicsStock-recruitment VariationTemperature Effects On Recruitment
Fluctuations in the Iberian stock in the period 1980-1989 have been examined, taking into account what is known of the biology of the species, oceanic and atmospheric parameters, and the fishing effort directed at this stock. During this period, there have been significant changes in recruitment, which was good in 1983 and 1987 and poor in 1982, 1985, 1986, and 1988. Some links between recruitment anomalies and environmental parameters (surface temperatures, prevailing winds, sea level) have been identified. Variations in recruitment can be explained on the basis of fluctuations in “environmental windows" during the periods of spawning and larval drift. The success of spawning is controlled by the existence of a favourable environment during larval drift into areas with weak upwelling and abundant food.Article from Marine Science Symposia Vol. 195 - "Hydrobiological variability in the ICES Area, 1980-1989", symposium held in Mariehamn, 5-7 June 1991. To access the remaining articles please click on the keyword "MSS Vol. 1995".