摘要：The duration of occurrence of two morphological forms of Keratella cochlearis varied seasonally in Lake Donghu, a shallow eutrophic lake in China. The total lengths of both K. cochlearis tecta and K. cochlearis cochlearis were negatively correlated with the water temperature. Total length of K. cochlearis tecta may also have been influenced by the degree of eutrophication or available food.
