Feeding behaviour of Anguilla anguilla and trophic resources in the Ingril Lagoon (Mediterranean, France)
International audience This study focuses on the diet of the eel Anguilla anguilla, sampled during one month of each of the four seasons from autumn 1998 to summer 1999 in the Languedocian Ingril Lagoon (Gulf ot Lion). The following feeding indices were calculated based on observations of 11 categor...
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ftsorbonneuniv:oai:HAL:hal-00753020v1 2024-09-15T17:39:31+00:00 Feeding behaviour of Anguilla anguilla and trophic resources in the Ingril Lagoon (Mediterranean, France) Bouchereau, Jean-Luc Marques, Catarina Pereira, Patricia Guélorget, Olivier Lourié, Sven-Michel Vergne, Yvan Systématique, adaptation, évolution (SAE) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Ecosystèmes lagunaires : organisation biologique et fonctionnement (ECOLAG) Université Montpellier 2 - Sciences et Techniques (UM2)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS) 2009 https://hal.univ-antilles.fr/hal-00753020 en eng HAL CCSD Station Biologique de Roscoff hal-00753020 https://hal.univ-antilles.fr/hal-00753020 ISSN: 0007-9723 EISSN: 2262-3094 Cahiers de Biologie Marine https://hal.univ-antilles.fr/hal-00753020 Cahiers de Biologie Marine, 2009, pp.319-332 Anguilla anguilla Mediterranean Lagoon ecosystems Diet Opportunism Bioindicator [SDV.BA]Life Sciences [q-bio]/Animal biology info:eu-repo/semantics/article Journal articles 2009 ftsorbonneuniv 2024-07-25T23:47:32Z International audience This study focuses on the diet of the eel Anguilla anguilla, sampled during one month of each of the four seasons from autumn 1998 to summer 1999 in the Languedocian Ingril Lagoon (Gulf ot Lion). The following feeding indices were calculated based on observations of 11 categories of prey found in the contents of full stomachs: coefficient of vacuity (CV), degree of fullness (DR), occurrence frequency (PP, in %), relative abundance (N, in %) and relative weight (P, in %). A parallel monitoring of the benthic macrofauna was conducted in autumn and spring. The interpretation of the results is based on the degree III of the scale of confinement established by Guélorget & Perthuisot (1983) and on the Costello et al. (1990) method, which combines PP and N. A. anguilla mainly feeds on benthic organisms, primarily amphipods crustaceans, polychaetes, insect larvae and small fish. The eel's feeding activity is very low in November and February and usually increases during May. The trophic quality available to the eel population in the Ingril Lagoon depends on its hydrodynamic variables, which are directly related to its close communication with the sea. Changes observed in the eel's diet over this year long study illustrate an opportunist type of feeding behaviour that reflects the typical composition of the macroinvertebrate species assemblage at a given point in time. Eels consume the type of benthic prey that is most available at a given moment without using a particular feeding strategy (e.g., specialisation or generalisation). The eels adapt by shifting their diet according to the energetic resources available in the ecosystem, which vary depending on hydrological regime. Thus, the facultative catadromous migrant species Anguilla anguilla could be used as a bioindicator of changes in the biological zonation and in the available food resources in the brackish ecosystem of Ingril Lagoon during its lagoon-resident ecophase. Article in Journal/Newspaper Anguilla anguilla HAL Sorbonne Université |
institution |
Open Polar |
collection |
HAL Sorbonne Université |
op_collection_id |
ftsorbonneuniv |
language |
English |
topic |
Anguilla anguilla Mediterranean Lagoon ecosystems Diet Opportunism Bioindicator [SDV.BA]Life Sciences [q-bio]/Animal biology |
spellingShingle |
Anguilla anguilla Mediterranean Lagoon ecosystems Diet Opportunism Bioindicator [SDV.BA]Life Sciences [q-bio]/Animal biology Bouchereau, Jean-Luc Marques, Catarina Pereira, Patricia Guélorget, Olivier Lourié, Sven-Michel Vergne, Yvan Feeding behaviour of Anguilla anguilla and trophic resources in the Ingril Lagoon (Mediterranean, France) |
topic_facet |
Anguilla anguilla Mediterranean Lagoon ecosystems Diet Opportunism Bioindicator [SDV.BA]Life Sciences [q-bio]/Animal biology |
description |
International audience This study focuses on the diet of the eel Anguilla anguilla, sampled during one month of each of the four seasons from autumn 1998 to summer 1999 in the Languedocian Ingril Lagoon (Gulf ot Lion). The following feeding indices were calculated based on observations of 11 categories of prey found in the contents of full stomachs: coefficient of vacuity (CV), degree of fullness (DR), occurrence frequency (PP, in %), relative abundance (N, in %) and relative weight (P, in %). A parallel monitoring of the benthic macrofauna was conducted in autumn and spring. The interpretation of the results is based on the degree III of the scale of confinement established by Guélorget & Perthuisot (1983) and on the Costello et al. (1990) method, which combines PP and N. A. anguilla mainly feeds on benthic organisms, primarily amphipods crustaceans, polychaetes, insect larvae and small fish. The eel's feeding activity is very low in November and February and usually increases during May. The trophic quality available to the eel population in the Ingril Lagoon depends on its hydrodynamic variables, which are directly related to its close communication with the sea. Changes observed in the eel's diet over this year long study illustrate an opportunist type of feeding behaviour that reflects the typical composition of the macroinvertebrate species assemblage at a given point in time. Eels consume the type of benthic prey that is most available at a given moment without using a particular feeding strategy (e.g., specialisation or generalisation). The eels adapt by shifting their diet according to the energetic resources available in the ecosystem, which vary depending on hydrological regime. Thus, the facultative catadromous migrant species Anguilla anguilla could be used as a bioindicator of changes in the biological zonation and in the available food resources in the brackish ecosystem of Ingril Lagoon during its lagoon-resident ecophase. |
author2 |
Systématique, adaptation, évolution (SAE) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Ecosystèmes lagunaires : organisation biologique et fonctionnement (ECOLAG) Université Montpellier 2 - Sciences et Techniques (UM2)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Bouchereau, Jean-Luc Marques, Catarina Pereira, Patricia Guélorget, Olivier Lourié, Sven-Michel Vergne, Yvan |
author_facet |
Bouchereau, Jean-Luc Marques, Catarina Pereira, Patricia Guélorget, Olivier Lourié, Sven-Michel Vergne, Yvan |
author_sort |
Bouchereau, Jean-Luc |
title |
Feeding behaviour of Anguilla anguilla and trophic resources in the Ingril Lagoon (Mediterranean, France) |
title_short |
Feeding behaviour of Anguilla anguilla and trophic resources in the Ingril Lagoon (Mediterranean, France) |
title_full |
Feeding behaviour of Anguilla anguilla and trophic resources in the Ingril Lagoon (Mediterranean, France) |
title_fullStr |
Feeding behaviour of Anguilla anguilla and trophic resources in the Ingril Lagoon (Mediterranean, France) |
title_full_unstemmed |
Feeding behaviour of Anguilla anguilla and trophic resources in the Ingril Lagoon (Mediterranean, France) |
title_sort |
feeding behaviour of anguilla anguilla and trophic resources in the ingril lagoon (mediterranean, france) |
publisher |
HAL CCSD |
publishDate |
2009 |
url |
https://hal.univ-antilles.fr/hal-00753020 |
genre |
Anguilla anguilla |
genre_facet |
Anguilla anguilla |
op_source |
ISSN: 0007-9723 EISSN: 2262-3094 Cahiers de Biologie Marine https://hal.univ-antilles.fr/hal-00753020 Cahiers de Biologie Marine, 2009, pp.319-332 |
op_relation |
hal-00753020 https://hal.univ-antilles.fr/hal-00753020 |
_version_ |
1810480535316725760 |