Leroy C., Binet Denis. (1988). Thermal anomalies in Tropical areas of the Atlantic possible consequences for albacore (Thunnus alalunga) recruitment. In :
Wyatt T. (ed.), Larraneta M.E. (ed.). Long term changes in marine fish populations = Cambios de largo termino en poblaciones de peces marinos. Vigo : Consejo Superior de Investigaciones Cientificas, p. 291-299. International Symposium on Long Terms Changes in Marine Fish Populations, Vigo (ESP), 1986/11/18-21.
Titre du document
Thermal anomalies in Tropical areas of the Atlantic possible consequences for albacore (Thunnus alalunga) recruitment
Année de publication
1988
Type de document
Colloque
Auteurs
Leroy C., Binet Denis
In
Wyatt T. (ed.), Larraneta M.E. (ed.) Long term changes in marine fish populations = Cambios de largo termino en poblaciones de peces marinos
Source
Vigo : Consejo Superior de Investigaciones Cientificas, 1988,
p. 291-299
Colloque
International Symposium on Long Terms Changes in Marine Fish Populations, Vigo (ESP), 1986/11/18-21
We have tried to test the hypothesis that sea surface temperature anomalies in the supposed spawning area have an influence on the recruitment of albacore, three years later. Considering a temperature of 24°C as a spawning limiting factor, we have computed the anomalies since 1964 in the 14°N to 30°N and 30°W to 60°W geographical area, from May to September, and in the part of the area where the monthly mean temperature since 1964 was between 24° and 25°C. Recruitment estimated from cohort analysis and recruitment estimated from catches by unit of effort (CPUE 3), taken back to the year of birth, seem respectively correlated with the thermal anomalies with a 3 years lag until 1976 and 1977, according to the year of birth. From 1978 onwards, the CPUE 3 are lower than expected from the chronology of thermal anomalies. We suppose that a discontinuity in the CPUE 3 series may explain this difference. (Résumé d'auteur)
Plan de classement
Autoécologie [036MILMAR03]
;
Stocks [040PECHE03]
Descripteurs
THON ; TEMPERATURE DE SURFACE ; ANOMALIE ; PONTE ; CORRELATION STATISTIQUE ; ALBACORE
