Relationships between individual behaviour and morphometry under different experimental conditions of temperature and feeding in glass eels (Anguilla anguilla)
After Anguilla anguilla larvae reach the European coast, metamorphosing glass eels exhibit an estuarine migration phase and can potentially colonize the continental area. Associated behaviours to upstream movement in estuary and river basin differ strongly: passive tidal transport in estuary, active...
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ftdoajarticles:oai:doaj.org/article:42db2eb06d1b472b95acf66015250efd 2023-05-15T13:27:05+02:00 Relationships between individual behaviour and morphometry under different experimental conditions of temperature and feeding in glass eels (Anguilla anguilla) A. Bardonnet J. Labonne J. Laffite J. Garnier 2008-01-01T00:00:00Z https://doaj.org/article/42db2eb06d1b472b95acf66015250efd EN eng EDP Sciences http://www.kmae-journal.org/articles/kmae/pdf/2008/03/kmae08015.pdf https://doaj.org/toc/1961-9502 1961-9502 https://doaj.org/article/42db2eb06d1b472b95acf66015250efd Knowledge and Management of Aquatic Ecosystems, Iss 390-391, p 02 (2008) body condition behaviour pigmentation migration colonization glass eel Aquaculture. Fisheries. Angling SH1-691 article 2008 ftdoajarticles 2022-12-31T00:41:45Z After Anguilla anguilla larvae reach the European coast, metamorphosing glass eels exhibit an estuarine migration phase and can potentially colonize the continental area. Associated behaviours to upstream movement in estuary and river basin differ strongly: passive tidal transport in estuary, active swimming beyond the upstream tidal limit. Moreover, the migratory behaviour may shift towards a density-dependent dispersal beyond this limit. A positive relationship has previously been established between glass eels’ body condition and migratory behaviour in estuary and also higher in the river basin. An experiment was settled to test for the density-dependent versus migratory behaviour under controlled conditions. The relationships between some behaviours (swimming, grouping, feeding, and aggressiveness) and body condition was investigated at the individual level. Two controlled factors were crossed, leading to four combinations of high and low levels of food and temperature. The high level of food led to a lesser loss in body condition. Swimming activity was positively related to initial body condition and loss in body condition, but these two variables were not related to aggressiveness. We conclude that the density-dependent dispersal hypothesis was not reinforced by these present results. Article in Journal/Newspaper Anguilla anguilla Directory of Open Access Journals: DOAJ Articles |
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Directory of Open Access Journals: DOAJ Articles |
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language |
English |
topic |
body condition behaviour pigmentation migration colonization glass eel Aquaculture. Fisheries. Angling SH1-691 |
spellingShingle |
body condition behaviour pigmentation migration colonization glass eel Aquaculture. Fisheries. Angling SH1-691 A. Bardonnet J. Labonne J. Laffite J. Garnier Relationships between individual behaviour and morphometry under different experimental conditions of temperature and feeding in glass eels (Anguilla anguilla) |
topic_facet |
body condition behaviour pigmentation migration colonization glass eel Aquaculture. Fisheries. Angling SH1-691 |
description |
After Anguilla anguilla larvae reach the European coast, metamorphosing glass eels exhibit an estuarine migration phase and can potentially colonize the continental area. Associated behaviours to upstream movement in estuary and river basin differ strongly: passive tidal transport in estuary, active swimming beyond the upstream tidal limit. Moreover, the migratory behaviour may shift towards a density-dependent dispersal beyond this limit. A positive relationship has previously been established between glass eels’ body condition and migratory behaviour in estuary and also higher in the river basin. An experiment was settled to test for the density-dependent versus migratory behaviour under controlled conditions. The relationships between some behaviours (swimming, grouping, feeding, and aggressiveness) and body condition was investigated at the individual level. Two controlled factors were crossed, leading to four combinations of high and low levels of food and temperature. The high level of food led to a lesser loss in body condition. Swimming activity was positively related to initial body condition and loss in body condition, but these two variables were not related to aggressiveness. We conclude that the density-dependent dispersal hypothesis was not reinforced by these present results. |
format |
Article in Journal/Newspaper |
author |
A. Bardonnet J. Labonne J. Laffite J. Garnier |
author_facet |
A. Bardonnet J. Labonne J. Laffite J. Garnier |
author_sort |
A. Bardonnet |
title |
Relationships between individual behaviour and morphometry under different experimental conditions of temperature and feeding in glass eels (Anguilla anguilla) |
title_short |
Relationships between individual behaviour and morphometry under different experimental conditions of temperature and feeding in glass eels (Anguilla anguilla) |
title_full |
Relationships between individual behaviour and morphometry under different experimental conditions of temperature and feeding in glass eels (Anguilla anguilla) |
title_fullStr |
Relationships between individual behaviour and morphometry under different experimental conditions of temperature and feeding in glass eels (Anguilla anguilla) |
title_full_unstemmed |
Relationships between individual behaviour and morphometry under different experimental conditions of temperature and feeding in glass eels (Anguilla anguilla) |
title_sort |
relationships between individual behaviour and morphometry under different experimental conditions of temperature and feeding in glass eels (anguilla anguilla) |
publisher |
EDP Sciences |
publishDate |
2008 |
url |
https://doaj.org/article/42db2eb06d1b472b95acf66015250efd |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_source |
Knowledge and Management of Aquatic Ecosystems, Iss 390-391, p 02 (2008) |
op_relation |
http://www.kmae-journal.org/articles/kmae/pdf/2008/03/kmae08015.pdf https://doaj.org/toc/1961-9502 1961-9502 https://doaj.org/article/42db2eb06d1b472b95acf66015250efd |
_version_ |
1766396362116562944 |