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Hatching of Daphnia sexual eggs. I. Intraspecific differences in the hatching responses of D. magna eggs
Author(s) -
MEESTER LUC,
JAGER HILDE
Publication year - 1993
Publication title -
freshwater biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.297
H-Index - 156
eISSN - 1365-2427
pISSN - 0046-5070
DOI - 10.1111/j.1365-2427.1993.tb00803.x
Subject(s) - hatching , biology , daphnia magna , offspring , zoology , intraspecific competition , daphnia , ecology , cladocera , larva , crustacean , genetics , pregnancy , chemistry , organic chemistry , toxicity
SUMMARY1 To test the hypothesis that the variability in hatching response of the sexual eggs of Daphnia has a genetic component, hatching after a standardized decapsulation technique was studied in different D. magna families, resulting from intra‐ as well as interclonal crosses. 2 There were significant differences in hatching response between families. Average hatching rates ranged from 0.0% to 81.9%, depending on the family under study. 3 Offspring‐on‐parent regressions indicate that the hatching rate‐of sexual eggs is to a large extent determined by the genotype of the mother (maternal inheritance). 4 Our results suggest that there is ample generic variation on a microgeographic scale for characteristics related to hatching of sexual eggs in Daphnia .