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Worldwide distribution and ecology of Alonopsis (Cladocera: Chydoridae) with a description of Alonopsis americana sp. nov.
Author(s) -
Kubersky Edward S.
Publication year - 1977
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.1977.3510620505
Subject(s) - cladocera , interspecific competition , ecology , parthenogenesis , biology , population , western hemisphere , southern hemisphere , geography , crustacean , fishery , demography , embryo , economic geography , sociology
Whereas Alonopsis is widespread in Eurasia west of the Ural Mountains, in the Western Hemisphere Alonopsis has been recovered only in eleven lakes in New Hampshire and Maine and in two lakes in Newfoundland. The North American population is well differentiated from the Eurasian Alonopsis elongata and is described as a new species, A. americana . To test if the species were reproductively isolated, parthenogenetically reproducing stocks from England and New England were raised in the labaratory, and subsequently induced to undergo gamogenesis. Interspecific crosses were never successful.