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

✍ Scribed by G. Minkoff; E. Lubzens; D. Kahan

• Book ID: 104621871
• Publisher: Springer
• Year: 1983
• Tongue: English
• Weight: 528 KB
• Volume: 104
• Category: Article
• ISSN: 1573-5141
• DOI: 10.1007/bf00045953

✦ Synopsis

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% 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% 0 (at 15 °C) showed optimal hatching at 16% 0 . Incubation of resting eggs in distilled water permitted normal embryonic development, but neonates died at eclosion . Presence of algae, Chlorella stigmatophora (0 .5 X 106 cell ml -1 ), was found to aid hatching .