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Changes in Size Distribution of Snow Crabs (Chionoecetes opilio) in the Southwestern Gulf of St. Lawrence

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Bouchard, Roxane et Brêthes, Jean-Claude et Desrosiers, Gaston et Bailey, Richard F. J. (1986). Changes in Size Distribution of Snow Crabs (Chionoecetes opilio) in the Southwestern Gulf of St. Lawrence. Journal of Northwest Atlantic Fishery Science, 7 (1). p. 67-75.

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Résumé

Size distributions of the exploited snow crab (Chionoecetes opilio) population in the southwestern Gulf of St. Lawrence were obtained from commercial landings in New Brunswick ports during 1977-82. The unexploited part of the stock was sampled during research vessel surveys in 1980 and 1981. The size distributions were analyzed by factorial analysis of correspondence. The trend in mean size was negative from 1977 to 1981 and positive thereafter. The analysis identified two periods of recruitment to the standing stock within each year: the first at the beginning of summer and the second in late summer and autumn. Growth of the previouslyrecruited crabs occurred between these two periods. Analysis of research vessel data indicated that many prerecruits inhabited areas outside the usual fishing grounds. The hypothesis is proposed of recruitment by platoons, with a part being due possibly to migration of crabs from shallow unexploited areas to deeper water where the commercial fishery occurs.

Type de document : Article
Validation par les pairs : Oui
Information complémentaire : CC BY NC 2.5 Canada
Départements et unités départementales : Institut des sciences de la mer de Rimouski (ISMER)
Déposé par : DIUQAR UQAR
Date de dépôt : 05 nov. 2020 18:54
Dernière modification : 05 nov. 2020 18:54
URI : http://semaphore.uqar.ca/id/eprint/1707

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