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Intraspecific variability in response to stimuli for male and ephippia formation in Daphnia pulex by Petter Larsson is a Environmental Science article available to read on EtoBox.

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Natural clones and clones from laboratory crossings of Daphnia pulex have been tested in their response to stimuli for male and ephippia formation . The clones are from ponds in Illinois, USA, an area with both obligate and cyclical clones of D . pulex . The progeny from two types of crosses were studied : 1) crosses between an obligate clone producing males and a cyclical clone producing only females, and 2) self-fertilization within a cyclical clone producing both sexes . Both the natural and the artificial clones showed great variation in response to environmental stimuli for males . Ephippia response seems more equal among the clones, but two of the artificial clones could hardly be stimulated to produce ephippia in the induction experiments . In crowded cultures, however, they produced a few . Crossings between cyclicals and obligates yielded mostly cyclical progeny . Progeny from the selfed clone had low survival and fecundity .

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Author

Petter Larsson

Publisher

Springer; Springer-Verlag; Springer (Kluwer Academic Publishers); Kluwer Academic Publishers; Springer Science and Business Media LLC (ISSN 1573-5141)

Published

1991

Language

EN

Field

Environmental Science (Physical Sciences)