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The Chydorid Crustacean Alona diaphana (King), Limnetic in Lakes Awasa and Zwai, Ethiopia, with a Discussion of Littoral and Limnetic Zooplankton
Author(s) -
Fernando C. H.,
Belay Semeneii,
Mengestou Seyoum
Publication year - 1990
Publication title -
internationale revue der gesamten hydrobiologie und hydrographie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.524
H-Index - 52
eISSN - 1522-2632
pISSN - 0020-9309
DOI - 10.1002/iroh.19900750103
Subject(s) - limnetic zone , littoral zone , zooplankton , ecology , branchiopoda , cladocera , profundal zone , predation , biology , crustacean , geography
Alona diaphana , a common littoral tropicopolitan cladoceran, occurs in the limnetic of two Ethiopian lakes in considerable numbers and over long periods of time. Our results are presented and the composition of limnetic and littoral zooplankton, in terms of previous records of such incursions, are discussed. The high persistent densities of A. diaphana are due to the extensive littoral areas in the lakes, where it originates, the high intrinsic rates of increase of this species, the low diversity of zooplankton, reducing competition and the low level of predation.