Original paper

An experimental survey of freshwater shrimp upstream migration in an impounded stream of Guadeloupe Island, Lesser Antilles

Fièvet, Eric

Archiv für Hydrobiologie - Hauptbände Volume 144 Number 3 (1999), p. 339 - 355

37 references

published: Mar 5, 1999

DOI: 10.1127/archiv-hydrobiol/144/1999/339

BibTeX file

ArtNo. ESP141014403008, Price: 29.00 €

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Abstract

Experimental trapping fishways (FWs) were used to investigate the population structures of migrating shrimps (Crustacea, Decapoda, Caridea) at two valley dams (150 and 320 m a.s.l.) in Bananier River, Guadeloupe Island, Lesser Antilles. Eight of the nine species recorded by electrofishing (EF) in dam vicinities were also captured in FWs. Migrating shrimp numbers varied versus time and an overall peak of migration occurred on about the 25th day of experimentation. At both dams the effect of FW location on numbers captured demonstrated the importance of attraction by water discharge during the upper migration of shrimps. Three species dominated the shrimp fauna of Bananier River: Macrobrachium faustinum, Micratya poeyi and Atya innocous. Mainly small (juvenile and subjuvenile) individuals migrated in the first two species, which inhabit stream reaches lower than 250 m a.s.l., whereas juvenile and mature ones migrated in the third species which inhabits headwaters.

Keywords

trapping fishwayselectrofishingjuvenilesmigrationshrimpheadwatersGuadeloupe IslandLesser Antilles