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Environmental factors affecting hatching of rotifer (Brachionus plicatilis) resting eggs

  • G. Minkoff
  • E. Lubzens
  • D. Kahan
Part of the Developments in Hydrobiology book series (DIHY, volume 14)

Abstract

Hatching experiments were carried out on a population of Brachionus plicatilis (Dor strain) resting eggs produced in batch laboratory cultures under controlled conditions and then stored for at least one month at 4°C in the dark. Light was found to be obligatory for termination of dormancy. Over the temperature range of 10–30°C (at 9.0‰ salinity), hatching was optimal (40–70%) at 10–15°C and decreased linearly with the rise in incubation temperature. Resting eggs incubated over a salinity range of 9–40‰ (at 15°C) showed optimal hatching at 16‰. Incubation of resting eggs in distilled water permitted normal embryonic development, but neonates died at eclosion. Presence of algae, Chlorella stigmatophora (0.5 × 106 cell ml−1), was found to aid hatching.

Keywords

rotifers resting eggs hatching temperature salinity light algae 

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Copyright information

© Dr W. Junk Publishers, The Hague 1983

Authors and Affiliations

  • G. Minkoff
    • 1
  • E. Lubzens
    • 1
  • D. Kahan
    • 2
  1. 1.Israel Oceanographic & Limnological ResearchHaifaIsrael
  2. 2.Deparment of ZoologyThe Hebrew University of JerusalemJerusalemIsrael

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