Gammarus aequicauda (Martynov, 1931) and Gammarus insensibilis Stock, 1966 have been the subject of a quantitative ecological research project in the lagoon system of Bages-Sigean (France, dépt. Aude). From April 1976 till August 1977 samples have been taken at 31 different stations all over the lagoon at intervals of about 2 weeks. With the samples thus obtained we studied the biology and distribution of the two species in relation to environmental factors, the most important being chlorinity and temperature.

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IWASAKI, N. & COUWEL&AR, M. VAN (2001): A new species of Sergia from the Red Sea (Crustacea: Decapoda: Sergestidae). -Senckenbergiana marit., 31 (1): 91-97, 3 figs.; Frankfurt a. M.] Sergia erythraeensis sp. nov., a sergestid shrimp, is described. The species is apparently endemic to the Red Sea. Kurzfassung [IwAsAKI, N. & COUWELAAR, M. VAN (2001): Eine neue Sergia-Art aus dem Roten Meer (Crustacea: Decapoda: Sergestidae). -Senckenbergiana marit., 31 (1): 91-97, 3 Abb.; Frankfurt a. M.]Sergia erythraeensis sp. nov., eine neue Sergestiden-Art, die anscheinend endemisch fª das Rote Meer ist, wird beschrieben.

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