Nature of Infestation and Prevalence of Ergasilus Sp. (Copepoda) on the Fish, Liza Macrolepis (Mugillidae) of theThenkapattinam Estuary (Tamil Nadu, India)

By : A. A. Sivakumar , J. Kiruba , P. Natarajan

Page No: 133-141

Abstract
Ergasilus sp. was found attached to the gill filaments of the host and the attachment is effected by second antennae. The distribution studies indicated that it was more towards the anterior region (44.16 %) of the gill. The infestation was found to be 58.48% and the intensity was 7.86. Prevalence and intensity of the parasite in relation to different months, size and sex of the host and water flow in the environment have also been studied in detail.

Authors :
A. A. Sivakumar
Department of Environmental Studies, Kovai Kalaimagal College of Arts & Science, Narasipuram (PO), Coimbatore – 641 109, Tamil Nadu

J. Kiruba and P. Natarajan
Department of Aquatic Biology & Fisheries, University of Kerala, Trivandrum – 695 007, Kerala.