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Some ecological aspects of Ergasilus centrarchidarum Wright (Crustacea: Copepoda) on largemouth and spotted bass in Lake Fort Smith, Arkansas.

Certain ecological aspects of Ergasilus centrarchidarum on largemouth and spotted bass from Lake Fort Smith, Arkansas, were studied during July 1970 through June 1971. There were no significant differences in E. centrarchidarum intensities between host sexes. E. centrarchidarum tended to increase in abundance with the age of the hosts through the first 3 years, then declined in older hosts. Maximum abundance and egg production occurred during the summer months. Optimum temperatures for abundance and egg production ranged from 24 to 29 C. There was no evidence of antagonism among E. centrarchidarum and other concomitant species of gill parasites.