Trichodinid Parasites on the Gills ofChanna punctatusfrom the Wild and Cultured Environments in Sylhet, Bangladesh

Mitu Deb,Mohibur Rahman,Zobada Kanak Khan,Md Faruque Miah

doi:10.1155/2015/161562

Abstract

Two trichodinid parasites,Trichodina cyprinocolaandTrichodina pediculus, were acknowledged in the gills during a sampling preparation of thirty fishChanna punctatusfrom the wild and cultured environments. However,Trichodina pediculuswas recorded only in one farmed fish. From a total of 33 parasites, 26.67% were encountered in wild and 46.67% in cultured fish. The overall incidence of infection byTrichodina cyprinocolawas 33.33% whilstTrichodina pediculuswas only 3.33%. Records from statistical analysis as well affirmed that fish host from the cultured environment constituted the highest rate of intensity(3.43±1.4), density(1.6±2.0), and infection index (11.2±13.95)values. Both trichodinid species are identified based on the study in their unique denticles structure. Relatively large size of adhesive disc with tiny curved denticles and elongated denticle rays are the exceptional denticle morphology observed inTrichodina pediculusand compact association of sickle denticles with round tangent point alongside short vigorous upright rays evaluated theTrichodina cyprinocola.

Highlights

Snake headed fish are abundantly found in all the freshwater habitats of Bangladesh and they are less catch in river or running water but good catch in flood plains
Five snake headed fish such as Channa punctatus, C. striatus, C. marulius, C. barca, and C. orientalis are known in Bangladesh but they are becoming scarce during the recent years
Thirty young fish C. punctatus were sampled in live condition from wild and Advances in Zoology cultured environments where 15 individuals were selected for each environment for observing trichodinid parasites on gills

Summary

Introduction

Snake headed fish are abundantly found in all the freshwater habitats of Bangladesh and they are less catch in river or running water but good catch in flood plains. Five snake headed fish such as Channa punctatus, C. striatus, C. marulius, C. barca, and C. orientalis are known in Bangladesh but they are becoming scarce during the recent years. Channa punctatus is one of the popular snake headed fish in Bangladesh with highly developed parental care. Channa punctatus is the most popular fish species in Sylhet but their abundance is reducing due to overexploitation, environmental stress, and disease outbreaks [1]. Helminth parasites in C. striatus and C. marulius are listed [5] and some other researches were done on the snake headed fishes with different parasites [6,7,8]

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