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Observations morphologiques et ecologiques sur Daphnia ambigua Scourfield, 1946 (Cladocera), espèce nouvelle pour la France

Claude Amoros
Crustaceana
Vol. 39, No. 3 (Nov., 1980), pp. 247-254
Published by: Brill
Stable URL: http://www.jstor.org/stable/20103557
Page Count: 11
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Observations morphologiques et ecologiques sur Daphnia ambigua Scourfield, 1946 (Cladocera), espèce nouvelle pour la France
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Abstract

Daphnia ambigua is rare in Europe and is considered an introduced species. It was sporadically collected in the vicinity of Lyon (France) from two fishponds and regularly from an abandoned meander of the Rhône river. The shell spinulation, the postabdominal claw of females and the antennula of males were studied at a high magnification with a scanning electron microscope. Some data are given about the ecology of this species which lives in eutrophic waters frequently associated with Bosmina longirostris and Ceriodaphnia quadrangula or C. pulchella. The fact that the European localities of D. ambigua very often are relatively recent waters agrees with the hypothesis that it is introduced.

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