Effect of differing maternal ration on adult fecundity and offspring size in laboratory cultures of Daphnia magna Straus for ecotoxicological testing

Eileen J. Cox, Caroline Naylor, Mairead C. Bradley, Peter Calow

    Research output: Contribution to journalArticlepeer-review

    21 Scopus citations

    Abstract

    By manipulating maternal ration both numbers and lengths of D. magna neonates could be modified. Maternal ration was adjusted by maintaining a constant volume of medium and added food (Chlorella), but varying the number of daphnids per vessel. At low stocking densities, larger numbers of smaller neonates were produced per female than at higher stocking densities, in which fewer, larger neonates were produced per female. The results indicate that careful control of maternal ration is necessary to maintain a predictable supply of uniform neonates for ecotoxicological purposes.

    Original languageEnglish (US)
    Pages (from-to)63-74
    Number of pages12
    JournalAquatic Toxicology
    Volume24
    Issue number1-2
    DOIs
    StatePublished - Nov 1992

    Bibliographical note

    Funding Information:
    This work was supportedb y a grant from Shell ResearchL imited to study optimum conditionsf or the cultureo f Daphnia nragna.

    Keywords

    • Culture
    • Daphnia
    • Fecundity
    • Neonate length
    • Ration

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