FISH COMMUNITY STRUCTURE IN TEMPORARY LOWLAND FLOODED GRASSLANDS

In the context of a clear-cutting experiment of sedge areas on seasonally flooded grasslands, we described the fish community structure and the relationships between its spatial organisation and some environmental variables in early spring in 2000. A confinement gradient related to an increase in ma...

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Bibliographic Details
Main Authors: CARPENTIER A., PAILLISSON J.-M., FEUNTEUN E., MARION L.
Format: Article in Journal/Newspaper
Language:English
Published: EDP Sciences 2004
Subjects:
fish assemblages
temporarily flooded grasslands
colonization
confinement gradient
multivariate analyses
electrofishing
Aquaculture. Fisheries. Angling
SH1-691
Anguilla anguilla
Online Access:https://doi.org/10.1051/kmae:2005037
https://doaj.org/article/9fed1d9ca8524c8f86834a91221188b6
Description
Summary:In the context of a clear-cutting experiment of sedge areas on seasonally flooded grasslands, we described the fish community structure and the relationships between its spatial organisation and some environmental variables in early spring in 2000. A confinement gradient related to an increase in macrophyte density and determined by the nearest distance from permanent waters seemed to be a key factor in structuring the fish community in the flooded grasslands. Along this gradient, Cyprinids (essentially 0+) dominated near permanent water bodies (95% in abundance) but were substituted further by more tolerant species (Anguilla anguilla and Lepomis gibbosus) and mainly Ameiurus melas (age > 1, 40% in abundance). Although most species (10/13) present in the main permanent channels have been found in flooded grasslands, the efficiency of these grasslands as fish habitat was low compared to other similar sites from literature. We concluded on the importance of a confinement gradient and the water regime, isolating grasslands during summer and responsible of the scarce presence of fish.

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