Ref ID : 759
Charles, E.K. and Terry W. Snell; Density-dependent sexual reproduction in natural populations of the rotifer Asplanchna girodi. Hydrobiologia 73:149-152, 1980
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The monogonont rotifer Asplanchna girodi was continuously present in daily and bi-daily plankton samples of Golf Course Pond during the spring of 1977. Two cycles of sexual reproduction occurred during this period. By isolation and culture of females it was possible to determine the reproduction type of collected individuals. Data thus obtained suggest that environmental cues associated with population density are responsible for the production of sexual females.