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Food of the European eel Anguilla anguilla in the Mauguio lagoon (Mediterranean, France)

Jean-Luc Bouchereau ; Odjel za sistematiku, adaptaciju i evoluciju, UMR CNRS 7138 (UPMC), Kampus Fouillole,
Catarina Marques ; Ekosustavi laguna, UMR CNRS 5119, cc 93, Sveučilište u Montpellie-u II,
Patricia PEREIRA ; Ekosustavi laguna, UMR CNRS 5119, cc 93, Sveučilište u Montpellie-u II,
Olivier Guélorget ; Ekosustavi laguna, UMR CNRS 5119, cc 93, Sveučilište u Montpellie-u II,
Yvan VERGNE ; Ekosustavi laguna, UMR CNRS 5119, cc 93, Sveučilište u Montpellie-u II,


Puni tekst: engleski pdf 521 Kb

str. 159-170

preuzimanja: 784

citiraj


Sažetak

This study deals with temporal variations in eel Anguilla anguilla diet, sampled seasonally inthe Languedocian Mauguio lagoon (Gulf of Lion), from Autumn 1998 to Summer 1999. Eel mainlyfeeds on benthic organisms, primarily small Amphipoda, Crustacea (mainly Gammarus gr. locusta),Polychaeta, insect larvae (Chironomidae) and small fish. Based on variations in the eels feedingregime, seasonal influence is illustrated by decreased feeding activity in summer, which progressivelyincreases during the following seasons. The trophic quality available to eels in the Mauguiolagoon depends more on allochtonous inputs from the catchment area than on its own hydrodynamicson which water of marine origin has little influence due to its long distance from the sea.Variations observed during the four seasons illustrate the opportunist type feeding behaviour ofeels. They consume the most available benthic preys at a given moment without using a particularfeeding strategy like specialisation or generalisation. Eel adapts its diet according to the availableresources offered by the ecosystem. Because of this eel, as an amphihaline migrant species, can becharacterised as an obvious indirect bioindicator of the trophic capacity and very marked level ofconfinement in the brackish lagoon ecosystem of Mauguio.

Ključne riječi

Gulf of Lion, eel, lagoon, diet, opportunism, bioindicator

Hrčak ID:

45926

URI

https://hrcak.srce.hr/45926

Podaci na drugim jezicima: hrvatski

Posjeta: 1.444 *