Silvering process of female European eel in the north Adriatic: Who is really ready to migrate?
During the 1970s and 2010, the population of Anguilla anguilla declined significantly, and the species is now classified as a critically endangered species by the International Union for Conservation of Nature (IUCN). Considering its social, economic, and ecological importance, it is necessary to un...
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Online Access: | https://hdl.handle.net/11568/1223128 https://doi.org/10.1016/j.ecss.2024.108660 https://www.sciencedirect.com/science/article/pii/S0272771424000477 |
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ftunivpisairis:oai:arpi.unipi.it:11568/1223128 2024-04-28T07:55:05+00:00 Silvering process of female European eel in the north Adriatic: Who is really ready to migrate? Antonio Casalini Laura Gentile Pietro Emmanuele Alberto Elmi Oliviero Mordenti Casalini, Antonio Gentile, Laura Emmanuele, Pietro Elmi, Alberto Mordenti, Oliviero 2024 ELETTRONICO https://hdl.handle.net/11568/1223128 https://doi.org/10.1016/j.ecss.2024.108660 https://www.sciencedirect.com/science/article/pii/S0272771424000477 eng eng volume:299 numberofpages:11 journal:ESTUARINE, COASTAL AND SHELF SCIENCE https://hdl.handle.net/11568/1223128 doi:10.1016/j.ecss.2024.108660 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85185529488 https://www.sciencedirect.com/science/article/pii/S0272771424000477 info:eu-repo/semantics/openAccess Anguilla Anguilla Artificial reproduction Estuarine Gonadal maturation Lagoon Restoration info:eu-repo/semantics/article 2024 ftunivpisairis https://doi.org/10.1016/j.ecss.2024.108660 2024-04-11T00:08:18Z During the 1970s and 2010, the population of Anguilla anguilla declined significantly, and the species is now classified as a critically endangered species by the International Union for Conservation of Nature (IUCN). Considering its social, economic, and ecological importance, it is necessary to understand the biological mechanism that controls population dynamics, in particular the passage from the resident phase to the migratory phase. During this phase of their life cycle, the environment plays a key role in the maturation of the spawners which will eventually undertake a long spawning migration to the Sargasso Sea. An assessment of the morphological characteristics of eels during their silvering process and reproductive activity was conducted by collecting 1513 female eels from seven lagoons in the North Adriatic Sea. Morphometric analyses show that eels classified as pre-migratory according to the Silver Index are histologically (65% of eels with oocytes in the most advanced stage of development) and morphologically ready to migrate. Accordingly, pre-migrant eels treated with hormone induction performed similarly to migrant eels. They mated and spawned spontaneously in the tank with a percentage of 81.0%, and 88.2% of them produced viable eggs. The results showed how the North Adriatic lagoons could present favourable conditions that permit the fast development of females with high reproductive potential. This data can be used to develop successful strategies to conserve and manage eel populations. Article in Journal/Newspaper Anguilla anguilla European eel ARPI - Archivio della Ricerca dell'Università di Pisa Estuarine, Coastal and Shelf Science 299 108660 |
institution |
Open Polar |
collection |
ARPI - Archivio della Ricerca dell'Università di Pisa |
op_collection_id |
ftunivpisairis |
language |
English |
topic |
Anguilla Anguilla Artificial reproduction Estuarine Gonadal maturation Lagoon Restoration |
spellingShingle |
Anguilla Anguilla Artificial reproduction Estuarine Gonadal maturation Lagoon Restoration Antonio Casalini Laura Gentile Pietro Emmanuele Alberto Elmi Oliviero Mordenti Silvering process of female European eel in the north Adriatic: Who is really ready to migrate? |
topic_facet |
Anguilla Anguilla Artificial reproduction Estuarine Gonadal maturation Lagoon Restoration |
description |
During the 1970s and 2010, the population of Anguilla anguilla declined significantly, and the species is now classified as a critically endangered species by the International Union for Conservation of Nature (IUCN). Considering its social, economic, and ecological importance, it is necessary to understand the biological mechanism that controls population dynamics, in particular the passage from the resident phase to the migratory phase. During this phase of their life cycle, the environment plays a key role in the maturation of the spawners which will eventually undertake a long spawning migration to the Sargasso Sea. An assessment of the morphological characteristics of eels during their silvering process and reproductive activity was conducted by collecting 1513 female eels from seven lagoons in the North Adriatic Sea. Morphometric analyses show that eels classified as pre-migratory according to the Silver Index are histologically (65% of eels with oocytes in the most advanced stage of development) and morphologically ready to migrate. Accordingly, pre-migrant eels treated with hormone induction performed similarly to migrant eels. They mated and spawned spontaneously in the tank with a percentage of 81.0%, and 88.2% of them produced viable eggs. The results showed how the North Adriatic lagoons could present favourable conditions that permit the fast development of females with high reproductive potential. This data can be used to develop successful strategies to conserve and manage eel populations. |
author2 |
Casalini, Antonio Gentile, Laura Emmanuele, Pietro Elmi, Alberto Mordenti, Oliviero |
format |
Article in Journal/Newspaper |
author |
Antonio Casalini Laura Gentile Pietro Emmanuele Alberto Elmi Oliviero Mordenti |
author_facet |
Antonio Casalini Laura Gentile Pietro Emmanuele Alberto Elmi Oliviero Mordenti |
author_sort |
Antonio Casalini |
title |
Silvering process of female European eel in the north Adriatic: Who is really ready to migrate? |
title_short |
Silvering process of female European eel in the north Adriatic: Who is really ready to migrate? |
title_full |
Silvering process of female European eel in the north Adriatic: Who is really ready to migrate? |
title_fullStr |
Silvering process of female European eel in the north Adriatic: Who is really ready to migrate? |
title_full_unstemmed |
Silvering process of female European eel in the north Adriatic: Who is really ready to migrate? |
title_sort |
silvering process of female european eel in the north adriatic: who is really ready to migrate? |
publishDate |
2024 |
url |
https://hdl.handle.net/11568/1223128 https://doi.org/10.1016/j.ecss.2024.108660 https://www.sciencedirect.com/science/article/pii/S0272771424000477 |
genre |
Anguilla anguilla European eel |
genre_facet |
Anguilla anguilla European eel |
op_relation |
volume:299 numberofpages:11 journal:ESTUARINE, COASTAL AND SHELF SCIENCE https://hdl.handle.net/11568/1223128 doi:10.1016/j.ecss.2024.108660 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85185529488 https://www.sciencedirect.com/science/article/pii/S0272771424000477 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.ecss.2024.108660 |
container_title |
Estuarine, Coastal and Shelf Science |
container_volume |
299 |
container_start_page |
108660 |
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