Agonistic behaviour of wild eels and depressed survival and growth of farmed eels in mixed rearing experiments.
Anguilla
Japanese eel
agonistic behaviour
aquaculture
stocking
Journal
Journal of fish biology
ISSN: 1095-8649
Titre abrégé: J Fish Biol
Pays: England
ID NLM: 0214055
Informations de publication
Date de publication:
Jun 2022
Jun 2022
Historique:
revised:
04
03
2022
received:
08
10
2021
accepted:
16
03
2022
pubmed:
27
3
2022
medline:
29
6
2022
entrez:
26
3
2022
Statut:
ppublish
Résumé
To contribute to improving eel stocking procedures, the survival, growth and behaviour of farmed Japanese eels reared together with wild individuals were evaluated to learn about possible encounters of farmed- and stocked eels with wild eels. Two experiments were conducted to evaluate the (a) effect of the presence of wild eels on survival and growth of farmed eels in experimental ponds and (b) behavioural differences between wild and farmed eels placed in a small tank. In the survival and growth experiment, significantly lower survival and growth rates of farmed eels reared with wild eels were observed compared with farmed eels reared without wild eels (control). In the behavioural observations, the authors observed significantly higher occupation rates of a refuge and more frequent biting for wild eels, indicating a dominance of wild eels over farmed eels. Because wild and farmed eels used in the current experiments belong to the same genetic population, these differences resulted within one generation through the aquaculture rearing process.
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
1365-1374Subventions
Organisme : Chuo University
Organisme : Council for Eel Resource Enhancement in Kagoshima Prefecture
Organisme : Japan Society for the Promotion of Science
ID : JP19KK0292
Informations de copyright
© 2022 Fisheries Society of the British Isles.
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