Sexual behaviour and reproductive performance of the endangered European eel Anguilla anguilla (Linnaeus, 1758) based on direct observationsand paternity assignment in semi-natural conditions
European eel Anguilla anguilla is among the highly valued species for aquaculture. Since its peculiar biology, it is not yet possible to complete the whole life cycle in artificial conditions and its supply depends entirely on wild catches. In the last 50 years this species has suffered a population...
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Online Access: | http://hdl.handle.net/11585/708088 https://doi.org/10.1016/j.aqrep.2019.100258 https://www.sciencedirect.com/science/article/pii/S2352513419301450 |
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ftunibolognairis:oai:cris.unibo.it:11585/708088 2024-04-14T08:00:58+00:00 Sexual behaviour and reproductive performance of the endangered European eel Anguilla anguilla (Linnaeus, 1758) based on direct observationsand paternity assignment in semi-natural conditions Ilaria Guarniero Alessia Cariani Alice Ferrari SULLIOTTI, VALERIO Pietro Emmanuele Antonio Casalini Fausto Tinti Oliviero Mordenti Ilaria Guarniero Alessia Cariani Alice Ferrari Valerio Sulliotti Pietro Emmanuele Antonio Casalini Fausto Tinti Oliviero Mordenti 2020 ELETTRONICO http://hdl.handle.net/11585/708088 https://doi.org/10.1016/j.aqrep.2019.100258 https://www.sciencedirect.com/science/article/pii/S2352513419301450 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000517752000024 volume:16 issue:marzo firstpage:1 lastpage:7 numberofpages:7 journal:AQUACULTURE REPORTS http://hdl.handle.net/11585/708088 doi:10.1016/j.aqrep.2019.100258 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85075964364 https://www.sciencedirect.com/science/article/pii/S2352513419301450 info:eu-repo/semantics/openAccess Anguilla anguilla Aquaculture Artificial breeding Kinship analysis Parentage assignment info:eu-repo/semantics/article 2020 ftunibolognairis https://doi.org/10.1016/j.aqrep.2019.100258 2024-03-21T18:15:13Z European eel Anguilla anguilla is among the highly valued species for aquaculture. Since its peculiar biology, it is not yet possible to complete the whole life cycle in artificial conditions and its supply depends entirely on wild catches. In the last 50 years this species has suffered a population reduction of 99 % mainly due to overfishing. In a conservation perspective, it is of fundamental importance to improve the aquaculture production of European eel, to avoid the extinction of this species and preserve its residual genetic variability, allowing at the same time the fulfilling of costumers request without increasing its harvesting pressure. In this study we aimed to deepen the knowledge about the mechanisms at the basis of reproduction of the European eel in semi-natural conditions, through direct observation of spawning behaviour and through the paternity assignment using microsatellite markers. The systematic and prolonged observation of the reproductive behaviour of European eel and the contextual parentage analyses we carried out for the very first time in this species on 39 adults and 432 F1 randomly collected. We contributed to unravel the sexual behaviour of this species in the most common artificial reproduction conditions (polyandry), and define the precise courtship sequence until the release of gametes, and the male-male hierarchy in courtship. We characterized for the first time three main types of male: dominant (the first who starts the courtship, and the one with the majority of F1 assigned), subordinate (which starts the courtship only in a second time and with a minor percentage of F1 ascribed) and ineffective (which sometime appears totally disinterested to courtship and has few F1 or none). The evidences here produced represent an important attempt for developing good reproduction practices of the critically endangered European eel, providing a good starting point for its future aquaculture production. Article in Journal/Newspaper Anguilla anguilla European eel IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) Aquaculture Reports 16 100258 |
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Open Polar |
collection |
IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) |
op_collection_id |
ftunibolognairis |
language |
English |
topic |
Anguilla anguilla Aquaculture Artificial breeding Kinship analysis Parentage assignment |
spellingShingle |
Anguilla anguilla Aquaculture Artificial breeding Kinship analysis Parentage assignment Ilaria Guarniero Alessia Cariani Alice Ferrari SULLIOTTI, VALERIO Pietro Emmanuele Antonio Casalini Fausto Tinti Oliviero Mordenti Sexual behaviour and reproductive performance of the endangered European eel Anguilla anguilla (Linnaeus, 1758) based on direct observationsand paternity assignment in semi-natural conditions |
topic_facet |
Anguilla anguilla Aquaculture Artificial breeding Kinship analysis Parentage assignment |
description |
European eel Anguilla anguilla is among the highly valued species for aquaculture. Since its peculiar biology, it is not yet possible to complete the whole life cycle in artificial conditions and its supply depends entirely on wild catches. In the last 50 years this species has suffered a population reduction of 99 % mainly due to overfishing. In a conservation perspective, it is of fundamental importance to improve the aquaculture production of European eel, to avoid the extinction of this species and preserve its residual genetic variability, allowing at the same time the fulfilling of costumers request without increasing its harvesting pressure. In this study we aimed to deepen the knowledge about the mechanisms at the basis of reproduction of the European eel in semi-natural conditions, through direct observation of spawning behaviour and through the paternity assignment using microsatellite markers. The systematic and prolonged observation of the reproductive behaviour of European eel and the contextual parentage analyses we carried out for the very first time in this species on 39 adults and 432 F1 randomly collected. We contributed to unravel the sexual behaviour of this species in the most common artificial reproduction conditions (polyandry), and define the precise courtship sequence until the release of gametes, and the male-male hierarchy in courtship. We characterized for the first time three main types of male: dominant (the first who starts the courtship, and the one with the majority of F1 assigned), subordinate (which starts the courtship only in a second time and with a minor percentage of F1 ascribed) and ineffective (which sometime appears totally disinterested to courtship and has few F1 or none). The evidences here produced represent an important attempt for developing good reproduction practices of the critically endangered European eel, providing a good starting point for its future aquaculture production. |
author2 |
Ilaria Guarniero Alessia Cariani Alice Ferrari Valerio Sulliotti Pietro Emmanuele Antonio Casalini Fausto Tinti Oliviero Mordenti |
format |
Article in Journal/Newspaper |
author |
Ilaria Guarniero Alessia Cariani Alice Ferrari SULLIOTTI, VALERIO Pietro Emmanuele Antonio Casalini Fausto Tinti Oliviero Mordenti |
author_facet |
Ilaria Guarniero Alessia Cariani Alice Ferrari SULLIOTTI, VALERIO Pietro Emmanuele Antonio Casalini Fausto Tinti Oliviero Mordenti |
author_sort |
Ilaria Guarniero |
title |
Sexual behaviour and reproductive performance of the endangered European eel Anguilla anguilla (Linnaeus, 1758) based on direct observationsand paternity assignment in semi-natural conditions |
title_short |
Sexual behaviour and reproductive performance of the endangered European eel Anguilla anguilla (Linnaeus, 1758) based on direct observationsand paternity assignment in semi-natural conditions |
title_full |
Sexual behaviour and reproductive performance of the endangered European eel Anguilla anguilla (Linnaeus, 1758) based on direct observationsand paternity assignment in semi-natural conditions |
title_fullStr |
Sexual behaviour and reproductive performance of the endangered European eel Anguilla anguilla (Linnaeus, 1758) based on direct observationsand paternity assignment in semi-natural conditions |
title_full_unstemmed |
Sexual behaviour and reproductive performance of the endangered European eel Anguilla anguilla (Linnaeus, 1758) based on direct observationsand paternity assignment in semi-natural conditions |
title_sort |
sexual behaviour and reproductive performance of the endangered european eel anguilla anguilla (linnaeus, 1758) based on direct observationsand paternity assignment in semi-natural conditions |
publishDate |
2020 |
url |
http://hdl.handle.net/11585/708088 https://doi.org/10.1016/j.aqrep.2019.100258 https://www.sciencedirect.com/science/article/pii/S2352513419301450 |
genre |
Anguilla anguilla European eel |
genre_facet |
Anguilla anguilla European eel |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000517752000024 volume:16 issue:marzo firstpage:1 lastpage:7 numberofpages:7 journal:AQUACULTURE REPORTS http://hdl.handle.net/11585/708088 doi:10.1016/j.aqrep.2019.100258 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85075964364 https://www.sciencedirect.com/science/article/pii/S2352513419301450 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.aqrep.2019.100258 |
container_title |
Aquaculture Reports |
container_volume |
16 |
container_start_page |
100258 |
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1796305760990265344 |