Reproductive biology of the conger eel from the south coast of Brittany, France and comparison with the European eel
The gonadosomatic indices (I-G) of female conger eel Conger conger, aged between 2 and 11 years postmetamorphosis, ranged between 0(.)04 and 4(.)78 and were correlated with both age and body length. Microscopical examination of the gonads showed immature ovaries at two main stages of oocyte developm...
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2001
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ftcemoa:oai:irsteadoc.irstea.fr:PUB00009993 2023-05-15T13:27:10+02:00 Reproductive biology of the conger eel from the south coast of Brittany, France and comparison with the European eel Sbaihi, M. Fouchereau Peron, M. Meunier, F. Elie, P. Mayer, I. Burzawa Gerard, E. Vidal, B. Dufour, S. MUSEUM NATIONAL D'HISTOIRE NATURELLE PARIS MUSEUM NATIONAL D'HISTOIRE NATURELLE CONCARNEAU CEMAGREF BORDEAUX RABX STOCKHOLM UNIVERSITY SWE - FRANCE BRETAGNE 2001 application/pdf https://irsteadoc.irstea.fr/cemoa/PUB00009993 Anglais eng https://irsteadoc.irstea.fr/cemoa/PUB00009993 Date de dépôt: 2005-07-01 - Tous les documents et informations contenus dans la base CemOA Publications sont protégés en vertu du droit de propriété intellectuelle, en particulier par le droit d'auteur. La personne consultant la base CemOA Publications peut visualiser, reproduire, ou stocker des copies des publications, à condition que l'information soit seulement pour son usage personnel et non commercial. L'utilisation des travaux universitaires est soumise à autorisation préalable de leurs auteurs. Toute information relative au signalement d'une publication contenue dans CemOA Publications doit inclure la citation bibliographique usuelle : Nom du ou des auteurs, titre et source du document, date et URL de la notice (dc_identifier). 9610 ANGUILLIDAE ANGUILLA ANGUILLA GONADE MATURATION SEXE VITELLOGENESE CROISSANCE BIOLOGIQUE REPRODUCTION GONADS SEX VITELLOGENESIS Article de revue scientifique à comité de lecture 2001 ftcemoa 2021-06-29T08:13:39Z The gonadosomatic indices (I-G) of female conger eel Conger conger, aged between 2 and 11 years postmetamorphosis, ranged between 0(.)04 and 4(.)78 and were correlated with both age and body length. Microscopical examination of the gonads showed immature ovaries at two main stages of oocyte development, pre-vitellogenic oocytes for I-G1. The immaturity of the conger eels sampled in Concarneau Bay indicates that this species probably spawns in deeper oceanic waters. Radioimmunoassays (RIA) of sex steroids gave low serum levels of oestradiol and of 11-ketotestosterone, but higher levels of testosterone correlated with increase in I-G. Immunoenzymatic assay (ELISA) indicated low serum levels of vitellogenin (VtG), which were significantly correlated with I-G. The pre-vitellogenic and early vitellogenic stages observed in the coastal C conger were similar to the oocyte stages found in the European eel Anguilla anguilla, at the yellow and silver phases of its life cycle respectively. However, other morpho-functional changes, associated with silvering in Anguilla species, such as the increase in ocular index, and regression of the digestive tract, did not occur at the early vitellogenic stage in conger eels. (C) 2001 The Fisheries Society of the British Isles Article in Journal/Newspaper Anguilla anguilla European eel Irstea Publications et Bases documentaires (Irstea@doc/CemOA) |
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Open Polar |
collection |
Irstea Publications et Bases documentaires (Irstea@doc/CemOA) |
op_collection_id |
ftcemoa |
language |
English |
topic |
ANGUILLIDAE ANGUILLA ANGUILLA GONADE MATURATION SEXE VITELLOGENESE CROISSANCE BIOLOGIQUE REPRODUCTION GONADS SEX VITELLOGENESIS |
spellingShingle |
ANGUILLIDAE ANGUILLA ANGUILLA GONADE MATURATION SEXE VITELLOGENESE CROISSANCE BIOLOGIQUE REPRODUCTION GONADS SEX VITELLOGENESIS Sbaihi, M. Fouchereau Peron, M. Meunier, F. Elie, P. Mayer, I. Burzawa Gerard, E. Vidal, B. Dufour, S. Reproductive biology of the conger eel from the south coast of Brittany, France and comparison with the European eel |
topic_facet |
ANGUILLIDAE ANGUILLA ANGUILLA GONADE MATURATION SEXE VITELLOGENESE CROISSANCE BIOLOGIQUE REPRODUCTION GONADS SEX VITELLOGENESIS |
description |
The gonadosomatic indices (I-G) of female conger eel Conger conger, aged between 2 and 11 years postmetamorphosis, ranged between 0(.)04 and 4(.)78 and were correlated with both age and body length. Microscopical examination of the gonads showed immature ovaries at two main stages of oocyte development, pre-vitellogenic oocytes for I-G1. The immaturity of the conger eels sampled in Concarneau Bay indicates that this species probably spawns in deeper oceanic waters. Radioimmunoassays (RIA) of sex steroids gave low serum levels of oestradiol and of 11-ketotestosterone, but higher levels of testosterone correlated with increase in I-G. Immunoenzymatic assay (ELISA) indicated low serum levels of vitellogenin (VtG), which were significantly correlated with I-G. The pre-vitellogenic and early vitellogenic stages observed in the coastal C conger were similar to the oocyte stages found in the European eel Anguilla anguilla, at the yellow and silver phases of its life cycle respectively. However, other morpho-functional changes, associated with silvering in Anguilla species, such as the increase in ocular index, and regression of the digestive tract, did not occur at the early vitellogenic stage in conger eels. (C) 2001 The Fisheries Society of the British Isles |
author2 |
MUSEUM NATIONAL D'HISTOIRE NATURELLE PARIS MUSEUM NATIONAL D'HISTOIRE NATURELLE CONCARNEAU CEMAGREF BORDEAUX RABX STOCKHOLM UNIVERSITY SWE - |
format |
Article in Journal/Newspaper |
author |
Sbaihi, M. Fouchereau Peron, M. Meunier, F. Elie, P. Mayer, I. Burzawa Gerard, E. Vidal, B. Dufour, S. |
author_facet |
Sbaihi, M. Fouchereau Peron, M. Meunier, F. Elie, P. Mayer, I. Burzawa Gerard, E. Vidal, B. Dufour, S. |
author_sort |
Sbaihi, M. |
title |
Reproductive biology of the conger eel from the south coast of Brittany, France and comparison with the European eel |
title_short |
Reproductive biology of the conger eel from the south coast of Brittany, France and comparison with the European eel |
title_full |
Reproductive biology of the conger eel from the south coast of Brittany, France and comparison with the European eel |
title_fullStr |
Reproductive biology of the conger eel from the south coast of Brittany, France and comparison with the European eel |
title_full_unstemmed |
Reproductive biology of the conger eel from the south coast of Brittany, France and comparison with the European eel |
title_sort |
reproductive biology of the conger eel from the south coast of brittany, france and comparison with the european eel |
publishDate |
2001 |
url |
https://irsteadoc.irstea.fr/cemoa/PUB00009993 |
op_coverage |
FRANCE BRETAGNE |
genre |
Anguilla anguilla European eel |
genre_facet |
Anguilla anguilla European eel |
op_source |
9610 |
op_relation |
https://irsteadoc.irstea.fr/cemoa/PUB00009993 |
op_rights |
Date de dépôt: 2005-07-01 - Tous les documents et informations contenus dans la base CemOA Publications sont protégés en vertu du droit de propriété intellectuelle, en particulier par le droit d'auteur. La personne consultant la base CemOA Publications peut visualiser, reproduire, ou stocker des copies des publications, à condition que l'information soit seulement pour son usage personnel et non commercial. L'utilisation des travaux universitaires est soumise à autorisation préalable de leurs auteurs. Toute information relative au signalement d'une publication contenue dans CemOA Publications doit inclure la citation bibliographique usuelle : Nom du ou des auteurs, titre et source du document, date et URL de la notice (dc_identifier). |
_version_ |
1766396869720670208 |