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Hydrobiological Journal
SJR: 0.227 SNIP: 0.575 CiteScore™: 0.24

ISSN Imprimir: 0018-8166
ISSN On-line: 1943-5991

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Hydrobiological Journal

DOI: 10.1615/HydrobJ.v41.i3.20
pages 13-27

Influence of the Resting Period on the Rhythm of Hatching of Polyphemus pediculus Young (Crustacea: Branchiopoda, Onychopoda) from Resting Eggs

L. G. Butorina
Institute of Biology of Inland Waters of Russian Academy of Sciences, Borok, Yaroslavl' Region


Development of resting eggs of Polyphemus pediculus is asynchronous. The hatching of young is wave-form in character; it occurs by portions in accordance with the native diurnal, seasonal, perennial rhythms, as well as the environmental conditions survived by a population during the resting period. The species cyclicity is genetically determined. P. pediculus is a monocyclic species under any conditions. Local P. pediculus populations are genetically heterogeneous and formed by generations having different duration of the life cycle.

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