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- W2187512908 abstract "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 of 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 Guelorget & Perthuisot (1983) and on the Costello et al. (1990) method, which combines PP and N. A. anguillamainly 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 hydro- dynamic 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 anguillacould 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." @default.
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- W2187512908 date "2009-01-01" @default.
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- W2187512908 title "Feeding behaviour of Anguilla anguilla and trophic resources in the Ingril Lagoon (Mediterranean, France)" @default.
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