Unusual cases of adult intersexuality in the European eel Anguilla anguilla
International audience Two cases of intersexuality are reported for the first time in European eel, Anguilla anguilla (at the beginning of the silver eel stage), within 140 fish caught as glass eels in the south-west of France and reared in tanks at 17°C. Cysts containing spermatozoa were observed i...
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ftunivnantes:oai:HAL:hal-02651152v1 2023-05-15T13:26:55+02:00 Unusual cases of adult intersexuality in the European eel Anguilla anguilla Geffroy, Benjamin Fostier, Alexis Guiguen, Yann Bardonnet, Agnes Ecologie Comportementale et Biologie des Populations de Poissons (ECOBIOP) Institut National de la Recherche Agronomique (INRA)-Université de Pau et des Pays de l'Adour (UPPA) Laboratoire de Physiologie et Génomique des Poissons (LPGP) Institut National de la Recherche Agronomique (INRA)-Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique ) 2012 https://hal.inrae.fr/hal-02651152 https://doi.org/10.1159/000343781 en eng HAL CCSD Karger info:eu-repo/semantics/altIdentifier/doi/10.1159/000343781 info:eu-repo/semantics/altIdentifier/pmid/23095260 hal-02651152 https://hal.inrae.fr/hal-02651152 doi:10.1159/000343781 PRODINRA: 174095 PUBMED: 23095260 WOS: 000311899400007 ISSN: 1661-5425 EISSN: 1661-5433 Sexual Development https://hal.inrae.fr/hal-02651152 Sexual Development, Karger, 2012, 6 (6), pp.316-319. ⟨10.1159/000343781⟩ http://www.karger.com/sxd aromatase european eel hermaphrodite intersex [SDV.BA]Life Sciences [q-bio]/Animal biology [SDV.BDLR]Life Sciences [q-bio]/Reproductive Biology [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2012 ftunivnantes https://doi.org/10.1159/000343781 2022-11-09T01:09:56Z International audience Two cases of intersexuality are reported for the first time in European eel, Anguilla anguilla (at the beginning of the silver eel stage), within 140 fish caught as glass eels in the south-west of France and reared in tanks at 17°C. Cysts containing spermatozoa were observed in ovaries with pre-vitellogenic oocytes. This feature is very uncommon, especially owing to the fact that male cells do not normally reach this stage in captivity, and an environmentally controlled transdifferentation process may not be excluded. Besides, the expression of the gonadal aromatase gene (cyp19a1a) was found to be higher in these 2 intersexual fish compared to normal females, although these results must be considered with caution since only 2 intersexual fish were available. A possible feminizing effect of this ‘abnormal’ upregulation of aromatase is discussed. Article in Journal/Newspaper Anguilla anguilla Université de Nantes: HAL-UNIV-NANTES Sexual Development 6 6 316 319 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
aromatase european eel hermaphrodite intersex [SDV.BA]Life Sciences [q-bio]/Animal biology [SDV.BDLR]Life Sciences [q-bio]/Reproductive Biology [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
aromatase european eel hermaphrodite intersex [SDV.BA]Life Sciences [q-bio]/Animal biology [SDV.BDLR]Life Sciences [q-bio]/Reproductive Biology [SDE.MCG]Environmental Sciences/Global Changes Geffroy, Benjamin Fostier, Alexis Guiguen, Yann Bardonnet, Agnes Unusual cases of adult intersexuality in the European eel Anguilla anguilla |
topic_facet |
aromatase european eel hermaphrodite intersex [SDV.BA]Life Sciences [q-bio]/Animal biology [SDV.BDLR]Life Sciences [q-bio]/Reproductive Biology [SDE.MCG]Environmental Sciences/Global Changes |
description |
International audience Two cases of intersexuality are reported for the first time in European eel, Anguilla anguilla (at the beginning of the silver eel stage), within 140 fish caught as glass eels in the south-west of France and reared in tanks at 17°C. Cysts containing spermatozoa were observed in ovaries with pre-vitellogenic oocytes. This feature is very uncommon, especially owing to the fact that male cells do not normally reach this stage in captivity, and an environmentally controlled transdifferentation process may not be excluded. Besides, the expression of the gonadal aromatase gene (cyp19a1a) was found to be higher in these 2 intersexual fish compared to normal females, although these results must be considered with caution since only 2 intersexual fish were available. A possible feminizing effect of this ‘abnormal’ upregulation of aromatase is discussed. |
author2 |
Ecologie Comportementale et Biologie des Populations de Poissons (ECOBIOP) Institut National de la Recherche Agronomique (INRA)-Université de Pau et des Pays de l'Adour (UPPA) Laboratoire de Physiologie et Génomique des Poissons (LPGP) Institut National de la Recherche Agronomique (INRA)-Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique ) |
format |
Article in Journal/Newspaper |
author |
Geffroy, Benjamin Fostier, Alexis Guiguen, Yann Bardonnet, Agnes |
author_facet |
Geffroy, Benjamin Fostier, Alexis Guiguen, Yann Bardonnet, Agnes |
author_sort |
Geffroy, Benjamin |
title |
Unusual cases of adult intersexuality in the European eel Anguilla anguilla |
title_short |
Unusual cases of adult intersexuality in the European eel Anguilla anguilla |
title_full |
Unusual cases of adult intersexuality in the European eel Anguilla anguilla |
title_fullStr |
Unusual cases of adult intersexuality in the European eel Anguilla anguilla |
title_full_unstemmed |
Unusual cases of adult intersexuality in the European eel Anguilla anguilla |
title_sort |
unusual cases of adult intersexuality in the european eel anguilla anguilla |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://hal.inrae.fr/hal-02651152 https://doi.org/10.1159/000343781 |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_source |
ISSN: 1661-5425 EISSN: 1661-5433 Sexual Development https://hal.inrae.fr/hal-02651152 Sexual Development, Karger, 2012, 6 (6), pp.316-319. ⟨10.1159/000343781⟩ http://www.karger.com/sxd |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1159/000343781 info:eu-repo/semantics/altIdentifier/pmid/23095260 hal-02651152 https://hal.inrae.fr/hal-02651152 doi:10.1159/000343781 PRODINRA: 174095 PUBMED: 23095260 WOS: 000311899400007 |
op_doi |
https://doi.org/10.1159/000343781 |
container_title |
Sexual Development |
container_volume |
6 |
container_issue |
6 |
container_start_page |
316 |
op_container_end_page |
319 |
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1766395330113306624 |