Marquages de Penaeus duorarum notialis en Côte d'Ivoire. 2 - Migrations et mortalités

Garcia, S. (1975) Marquages de Penaeus duorarum notialis en Côte d'Ivoire. 2 - Migrations et mortalités. Documents Scientifiques, Centre de Recherches Océanographiques, Abidjan, 6(1), pp. 21-44.

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Abstract

Petersen disc tag marking experiments confirm the influence of animal size and marking time on the recapture rate. Westward migrations occur, probably following the Ivorian undercurrent. Catchability coefficients have been evaluated for the Grand-Bassam fishing ground and tentatively extrapolated to the other fishing areas. The extrapolated non weighted coefficient for the entire fishing areas is q=0.00069/fishing day for an area of 390 miles. The instantaneous coefficient of residual mortality X taken as a first and possibly slightly overestimated value of M the natural mortality, has been estimated at 0.155/month, strongly corroborating Berry's results (1967). This value is however much smaller than that given by earlier authors. It is suggested that q could have a higher value during the very first weeks of exploitation at sea, when the juveniles are concentrated near the lagoon outlets.

Item Type: Article
Title: Marquages de Penaeus duorarum notialis en Côte d'Ivoire. 2 - Migrations et mortalités
Personal Creator/Author:
CreatorsEmail
Garcia, S.
Journal or Publication Title: Documents Scientifiques, Centre de Recherches Océanographiques, Abidjan
Volume: 6
Number: 1
Page Range: pp. 21-44
Date: June 1975
Issuing Agency: Centre de Recherches Océanographiques, Côte d'Ivoire
Uncontrolled Keywords: Côte d'Ivoire; Penaeus duorarum; migration; tagging; recapture; mortality
Subjects: Biology
Ecology
Item ID: 8004
Depositing User: Ms Maria Kalentsits
Date Deposited: 08 Mar 2012 12:47
Last Modified: 08 Mar 2012 12:47
URI: http://aquaticcommons.org/id/eprint/8004

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