Ultrasonography as a non-invasive tool for sex determination and maturation monitoring in silver eels
International audience In the context of the severe decrease in temperate eel abundance, understanding and control of eel maturation has strong interest for scientific and commercial purposes. Possible use of ultrasonography for improvement of sex determination and maturation monitoring in silver ee...
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ftccsdartic:oai:HAL:hal-02600631v1 2023-05-15T13:27:59+02:00 Ultrasonography as a non-invasive tool for sex determination and maturation monitoring in silver eels Bureau Du Colombier, Sarah Jacobs, Louis Gesset, Charline Elie, Pierre Lambert, Patrick Ecosystèmes aquatiques et changements globaux (UR EABX) Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA) 2015 https://hal.inrae.fr/hal-02600631 en eng HAL CCSD Elsevier hal-02600631 https://hal.inrae.fr/hal-02600631 IRSTEA: PUB00042698 ISSN: 0165-7836 EISSN: 1872-6763 Fisheries Research https://hal.inrae.fr/hal-02600631 Fisheries Research, Elsevier, 2015, 164, pp.50-58 [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2015 ftccsdartic 2021-10-17T00:03:01Z International audience In the context of the severe decrease in temperate eel abundance, understanding and control of eel maturation has strong interest for scientific and commercial purposes. Possible use of ultrasonography for improvement of sex determination and maturation monitoring in silver eel was investigated. Gonads of 96 Anguilla anguilla silver eels were observed using portable equipment associated to a 6-15MHz probe, and sex determination was tried before artificial induction of maturation. To estimate gonad mass and monitor individual gonadosomatic index (GSI) in females, cross-sectional images were captured at different times of maturation and gonad length was measured at scanning. Two methods were tried for ovary mass estimation using ultrasonography: one based on a linear model and another on calculating ovary volume from a representation of gonad shape. Ultrasonography resulted in 100% success in sex determination. Ovary mass estimated by ultrasonography was strongly correlated to true ovary mass (R2=0.97). The use of a linear model for gonad mass and then GSI estimation seemed more appropriate than the use of a representation of gonad shape. Evolution of GSI estimates during maturation supports possible detection of early inter-individual differences in maturation using ultrasonography in female silver eels. This non-invasive tool can then obviously be exploited to improve sex determination in silver eels caught in the wild and to monitor maturation at the individual level. Ultrasonography thus has great potential for use in eel both for conservation and aquaculture. To our knowledge, this is the first report on the use of ultrasonography on eels or any anguillid species. Article in Journal/Newspaper Anguilla anguilla Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDE]Environmental Sciences |
spellingShingle |
[SDE]Environmental Sciences Bureau Du Colombier, Sarah Jacobs, Louis Gesset, Charline Elie, Pierre Lambert, Patrick Ultrasonography as a non-invasive tool for sex determination and maturation monitoring in silver eels |
topic_facet |
[SDE]Environmental Sciences |
description |
International audience In the context of the severe decrease in temperate eel abundance, understanding and control of eel maturation has strong interest for scientific and commercial purposes. Possible use of ultrasonography for improvement of sex determination and maturation monitoring in silver eel was investigated. Gonads of 96 Anguilla anguilla silver eels were observed using portable equipment associated to a 6-15MHz probe, and sex determination was tried before artificial induction of maturation. To estimate gonad mass and monitor individual gonadosomatic index (GSI) in females, cross-sectional images were captured at different times of maturation and gonad length was measured at scanning. Two methods were tried for ovary mass estimation using ultrasonography: one based on a linear model and another on calculating ovary volume from a representation of gonad shape. Ultrasonography resulted in 100% success in sex determination. Ovary mass estimated by ultrasonography was strongly correlated to true ovary mass (R2=0.97). The use of a linear model for gonad mass and then GSI estimation seemed more appropriate than the use of a representation of gonad shape. Evolution of GSI estimates during maturation supports possible detection of early inter-individual differences in maturation using ultrasonography in female silver eels. This non-invasive tool can then obviously be exploited to improve sex determination in silver eels caught in the wild and to monitor maturation at the individual level. Ultrasonography thus has great potential for use in eel both for conservation and aquaculture. To our knowledge, this is the first report on the use of ultrasonography on eels or any anguillid species. |
author2 |
Ecosystèmes aquatiques et changements globaux (UR EABX) Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA) |
format |
Article in Journal/Newspaper |
author |
Bureau Du Colombier, Sarah Jacobs, Louis Gesset, Charline Elie, Pierre Lambert, Patrick |
author_facet |
Bureau Du Colombier, Sarah Jacobs, Louis Gesset, Charline Elie, Pierre Lambert, Patrick |
author_sort |
Bureau Du Colombier, Sarah |
title |
Ultrasonography as a non-invasive tool for sex determination and maturation monitoring in silver eels |
title_short |
Ultrasonography as a non-invasive tool for sex determination and maturation monitoring in silver eels |
title_full |
Ultrasonography as a non-invasive tool for sex determination and maturation monitoring in silver eels |
title_fullStr |
Ultrasonography as a non-invasive tool for sex determination and maturation monitoring in silver eels |
title_full_unstemmed |
Ultrasonography as a non-invasive tool for sex determination and maturation monitoring in silver eels |
title_sort |
ultrasonography as a non-invasive tool for sex determination and maturation monitoring in silver eels |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.inrae.fr/hal-02600631 |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_source |
ISSN: 0165-7836 EISSN: 1872-6763 Fisheries Research https://hal.inrae.fr/hal-02600631 Fisheries Research, Elsevier, 2015, 164, pp.50-58 |
op_relation |
hal-02600631 https://hal.inrae.fr/hal-02600631 IRSTEA: PUB00042698 |
_version_ |
1766401574868877312 |