Ref ID : 715
Esther (wajc)Lubzens, G. Minkoff, and S. Marom; Salinity dependence of sexual and asexual reproduction in the rotifer Brachionus plicatilis. Marine Biology 85:123-126, 1985
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A salinity dependent mictic response was observed in a clone of Brachionus plicatilis cultured in the 2 to 4 0/00 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 0/00S and above, where G values were lower than 0.30 day-1, (b) low mictic levels in rotifers cultured at 2 and 30 0/00S, where G values ranged between 0.40 to 0.50 day-1, and (c) high mictic levels in rotifers cultured at salinities ranging between 4 to 20 0/00S, where G values ranged between 0.50 to 0.85 day-1. 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.