Mortality Rate of Eodiaptomus japonicus (Copepoda: Calanoida) in Lake Biwa.
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概要
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Seasonal and ontogenetic changes in mortality rate were studied for Eodiaptomus japonicus in Lake Biwa during May to November from 1984 to 1986. Mortality rate during each sampling interval was determined for individuals born within a certain time interval by comparing the actual individual number on the latter sampling date with the number that would be expected in the absence of mortality. The present method differs from existing methods in following changes in the number of individuals through their development instead of confining itself to a fixed age class. Adult E. japonicus showed large mortality rates throughout the study period, while juveniles showed large values during May to July of both 1984 and 1985.
- 日本陸水学会の論文
日本陸水学会 | 論文
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