The fecundity of skipjack tuna (Katsuwonus pelamis) from the western Indian Ocean

The fecundity of skipjack tuna (Katsuwonus pelamis) from the western Indian Ocean

Research Group: Centre ORSTOM de Brest BP 270, 29280 Plouzane France

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Bibliographic Details
Main Authors: Stequert, B., Ramcharrun, B.
Format: Proceedings Paper biblioteca
Language:English
Published: 1996
Subjects:Fecundity, Sexual maturity, Tuna fisheries, Fishery biology, Euthynnus pelamis, ISW, West Indian Ocean,
Online Access:http://hdl.handle.net/1834/18
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id dig-aquadocs-1834-18
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spelling dig-aquadocs-1834-182021-05-19T06:13:55Z The fecundity of skipjack tuna (Katsuwonus pelamis) from the western Indian Ocean Stequert, B. Ramcharrun, B. Fecundity Sexual maturity Tuna fisheries Fishery biology Euthynnus pelamis ISW, West Indian Ocean Research Group: Centre ORSTOM de Brest BP 270, 29280 Plouzane France From 281 females with fork lengths ranging from 43 to 73 cm and ripe ovaries, the batch fecundity of skipjack tuna (Katsuwonus pelamis) from the western part of the Indian Ocean was studied. Gilson's fluid, used as a preservative and dissociative agent for oocytes, has a strong and fast action (5 days) on the shrinkage of these oocytes. Counts made with a Dollfus box on sub-samples of dissociated oocytes show that, within a single sexual maturity period (February), the fecundity of skipjack tuna is the same whatever the geographic area: Mozambique Channel and South of Seychelles Islands. On the other hand, although sexual activity is noted for skipjack tuna throughout the year, individual fecundity changes with the season within a single area. This individual batch fecundity changes from 80,000 eggs for a 44-cm female caught along the northwestern coast of Madagascar to 1.25 million eggs for a large female (75 cm) caught around the Seychelles Islands. The corresponding relative batch fecundity varies from 40 to 130 eggs/g body weight. For this species, 4 successive spawning per year have been estimated. Published 2004-08-26T13:45:40Z 2004-08-26T13:45:40Z 1996 Proceedings Paper IOTC Proceedings, 6th Expert Consultation on Indian Ocean Tunas. p. 245-... IOTC Proceedings, 6th Expert Consultation on Indian Ocean Tunas: vol. 9. p. 245-... http://hdl.handle.net/1834/18 en 82267 bytes application/pdf
institution UNESCO
collection DSpace
country Francia
countrycode FR
component Bibliográfico
access En linea
databasecode dig-aquadocs
tag biblioteca
region Europa del Oeste
libraryname Repositorio AQUADOCS
language English
topic Fecundity
Sexual maturity
Tuna fisheries
Fishery biology
Euthynnus pelamis
ISW, West Indian Ocean
Fecundity
Sexual maturity
Tuna fisheries
Fishery biology
Euthynnus pelamis
ISW, West Indian Ocean
spellingShingle Fecundity
Sexual maturity
Tuna fisheries
Fishery biology
Euthynnus pelamis
ISW, West Indian Ocean
Fecundity
Sexual maturity
Tuna fisheries
Fishery biology
Euthynnus pelamis
ISW, West Indian Ocean
Stequert, B.
Ramcharrun, B.
The fecundity of skipjack tuna (Katsuwonus pelamis) from the western Indian Ocean
description Research Group: Centre ORSTOM de Brest BP 270, 29280 Plouzane France
format Proceedings Paper
topic_facet Fecundity
Sexual maturity
Tuna fisheries
Fishery biology
Euthynnus pelamis
ISW, West Indian Ocean
author Stequert, B.
Ramcharrun, B.
author_facet Stequert, B.
Ramcharrun, B.
author_sort Stequert, B.
title The fecundity of skipjack tuna (Katsuwonus pelamis) from the western Indian Ocean
title_short The fecundity of skipjack tuna (Katsuwonus pelamis) from the western Indian Ocean
title_full The fecundity of skipjack tuna (Katsuwonus pelamis) from the western Indian Ocean
title_fullStr The fecundity of skipjack tuna (Katsuwonus pelamis) from the western Indian Ocean
title_full_unstemmed The fecundity of skipjack tuna (Katsuwonus pelamis) from the western Indian Ocean
title_sort fecundity of skipjack tuna (katsuwonus pelamis) from the western indian ocean
publishDate 1996
url http://hdl.handle.net/1834/18
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AT stequertb fecundityofskipjacktunakatsuwonuspelamisfromthewesternindianocean
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