Rotifers were collected fortnightly between February 2009 and January 2010 at two sampling sites in subtropical, eutrophic lake Tingtang, China. The spatio-temporal variations in the morphological characteristics of Keratella cochlearis were documented, and the relationships between each of the morphometric parameters and ecological factors were evaluated. Unspined K. cochlearis occurred more frequently than spined one in the slightly eutrophic lake. The period during which unspined and spined K. cochlearis were present differed at both sampling sites. In those months when K. cochlearis appeared at both sampling sites, the differences in morphometric parameters between the two sampling sites differed with the sampling time and the rotifer morphotype. Density of cladocerans was the primary factor influencing the body length of spined K. cochlearis. Water temperature was responsible to influence the antero-median and antero-lateral spine lengths and the posterior spine length of spined K. cochlearis and all the morphometric parameters of unspined K. cochlearis.
Proceedings of the National Academy of Sciences, India Section B: Biological Sciences – Springer Journals
Published: Jul 29, 2016
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