Salinity dependence of sexual and asexual reproduction in the rotiferBrachionus plicatilis

✍ Scribed by E. Lubzens; G. Minkoff; S. Marom

• Publisher: Springer-Verlag
• Year: 1985
• Tongue: English
• Weight: 391 KB
• Volume: 85
• Category: Article
• ISSN: 0025-3162
• DOI: 10.1007/bf00397430

✦ Synopsis

A salinity dependent mictic response was observed in a clone of Brachionus plicatilis cultured in the 2 to 4%0 salinity range. This response was related to asexual exponential reproduction rates (G) and could be divided into three categories: (a) no mixis occurred at a salinity of 35%0 S and above, where G values were lower than 0.30 d -1, (b) low mictic levels in rotifers cultured at 2 and 30%o S, where G values ranged between 0.40 to 0.50 d -1, and (c) high mictic levels in rotifers cultured at salinities ranging between 4 and 20%o S, where G values ranged between 0.50 to 0.85 d-L Fluctuations in mictic levels varied with time during the course of the experiments. Results suggest that salinity conditions leading to optimal parthenogenic reproduction also support mixis.