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Titolo:
VARIABLE NATURAL MORTALITY-RATE OF JUVENILE NORWEGIAN SPRING-SPAWNINGHERRING (CLUPEA-HARENGUS L.) IN THE BARENTS SEA
Autore:
DEBARROS P; TORESEN R;
Indirizzi:
UNIV ALGARVE,UNIDADE CIENCIAS & TECNOL RECURSOS AQUAT P-8000 FARO PORTUGAL INST MARINE RES N-5024 BERGEN NORWAY
Titolo Testata:
ICES journal of marine science (Print)
fascicolo: 3, volume: 55, anno: 1998,
pagine: 430 - 442
SICI:
1054-3139(1998)55:3<430:VNMOJN>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
MARINE DEMERSAL FISH; BOOTSTRAP; STOCKS;
Keywords:
NORWEGIAN SPRING-SPAWNING HERRING; NATURAL MORTALITY; YEAR-CLASS STRENGTH; MODELING; STATISTICAL TESTING; BOOTSTRAP;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
36
Recensione:
Indirizzi per estratti:
Citazione:
P. Debarros e R. Toresen, "VARIABLE NATURAL MORTALITY-RATE OF JUVENILE NORWEGIAN SPRING-SPAWNINGHERRING (CLUPEA-HARENGUS L.) IN THE BARENTS SEA", ICES journal of marine science (Print), 55(3), 1998, pp. 430-442

Abstract

Understanding the patterns of mortality rate in the juvenile stages of exploited fish populations is essential for improving current stock assessment procedures. Most of the research on ''the recruitment problem'' has focused on the larval stages, but recent work. indicates thata large part of the variability in year-class strength may be associated to variable mortality rates during the juvenile stages. The data on abundance of juvenile Norwegian spring-spawning herring in the Barents Sea collected by the Bergen Institute of Marine Rest-arch between 1983 and 1993 was analysed iv test this hypothesis. The results give strong support to the hypothesis. Survival from the start of the 0-groupstage to age 3 years may have varied from 0 to 30% for the cohorts investigated. Mortality rate is shown to be strongly age-dependent. and between 75% and 99% of the total juvenile mortality occurs during the first year of life. (C), 1998 International Council for the Exploration of the Sea.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/09/20 alle ore 09:52:04