Sexual behaviour and reproductive performance of the endangered European eel Anguilla anguilla (Linnaeus, 1758) based on direct observations and 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...
Published in: | Aquaculture Reports |
---|---|
Main Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Elsevier
2020
|
Subjects: | |
Online Access: | https://doi.org/10.1016/j.aqrep.2019.100258 https://doaj.org/article/df7d4d65f00043b29db0c174ef97e951 |
id |
ftdoajarticles:oai:doaj.org/article:df7d4d65f00043b29db0c174ef97e951 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:df7d4d65f00043b29db0c174ef97e951 2023-05-15T13:27:01+02:00 Sexual behaviour and reproductive performance of the endangered European eel Anguilla anguilla (Linnaeus, 1758) based on direct observations and paternity assignment in semi-natural conditions Ilaria Guarniero Alessia Cariani Alice Ferrari Valerio Sulliotti Pietro Emmanuele Antonio Casalini Fausto Tinti Oliviero Mordenti 2020-03-01T00:00:00Z https://doi.org/10.1016/j.aqrep.2019.100258 https://doaj.org/article/df7d4d65f00043b29db0c174ef97e951 EN eng Elsevier http://www.sciencedirect.com/science/article/pii/S2352513419301450 https://doaj.org/toc/2352-5134 2352-5134 doi:10.1016/j.aqrep.2019.100258 https://doaj.org/article/df7d4d65f00043b29db0c174ef97e951 Aquaculture Reports, Vol 16, Iss , Pp - (2020) Aquaculture. Fisheries. Angling SH1-691 article 2020 ftdoajarticles https://doi.org/10.1016/j.aqrep.2019.100258 2022-12-31T08:56:46Z 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. Keywords: Anguilla anguilla, Aquaculture, Artificial breeding, Kinship analysis, ... Article in Journal/Newspaper Anguilla anguilla European eel Directory of Open Access Journals: DOAJ Articles Aquaculture Reports 16 100258 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Aquaculture. Fisheries. Angling SH1-691 |
spellingShingle |
Aquaculture. Fisheries. Angling SH1-691 Ilaria Guarniero Alessia Cariani Alice Ferrari Valerio Sulliotti 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 observations and paternity assignment in semi-natural conditions |
topic_facet |
Aquaculture. Fisheries. Angling SH1-691 |
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. Keywords: Anguilla anguilla, Aquaculture, Artificial breeding, Kinship analysis, ... |
format |
Article in Journal/Newspaper |
author |
Ilaria Guarniero Alessia Cariani Alice Ferrari Valerio Sulliotti Pietro Emmanuele Antonio Casalini Fausto Tinti Oliviero Mordenti |
author_facet |
Ilaria Guarniero Alessia Cariani Alice Ferrari Valerio Sulliotti 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 observations and 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 observations and 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 observations and 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 observations and 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 observations and 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 observations and paternity assignment in semi-natural conditions |
publisher |
Elsevier |
publishDate |
2020 |
url |
https://doi.org/10.1016/j.aqrep.2019.100258 https://doaj.org/article/df7d4d65f00043b29db0c174ef97e951 |
genre |
Anguilla anguilla European eel |
genre_facet |
Anguilla anguilla European eel |
op_source |
Aquaculture Reports, Vol 16, Iss , Pp - (2020) |
op_relation |
http://www.sciencedirect.com/science/article/pii/S2352513419301450 https://doaj.org/toc/2352-5134 2352-5134 doi:10.1016/j.aqrep.2019.100258 https://doaj.org/article/df7d4d65f00043b29db0c174ef97e951 |
op_doi |
https://doi.org/10.1016/j.aqrep.2019.100258 |
container_title |
Aquaculture Reports |
container_volume |
16 |
container_start_page |
100258 |
_version_ |
1766395903969591296 |