Journal of Environmental Biology

Population dynamics of a parasite Pallisentis in two species of fish

Channa punctatus and Channa striatus

Author Details

N. Gupta

(Corresponding author)

Department of Animal Science, M.J.P. Rohilkhand University, Bareilly-243 006, India

e-mail: guptagrawal@rediffmail.com

P. Singhal

Department of Animal Science, M.J.P. Rohilkhand University, Bareilly-243 006, India

D.K. Gupta

Department of Zoology, Bareilly College, Bareilly-243 005, India

Publication Data

Paper received:

06 August 2010

Revised received:

18 April 2011

Accepted:

23 April 2011

Abstract

In an aquatic environment, there is a profound and inverse relationship between environment quality and disease status of fish. Parasites are one of the most serious limiting factors in aquaculture.  Therefore, the present investigation has been undertaken to sort out the population dynamics of Pallisentis (Acanthocephala), in relation to host sex from freshwater fishes, Channa of Rohilkhand region. A total of 517 fishes (Channa punctatus, n= 198 and C. striatus, n= 319) were examined regularly from August 2006 to February 2010. Overall prevalence of Pallisentis in C. striatus was higher in females (67.78%) as compared to males (63.52%). In case of C. punctatus, overall prevalence of Pallisentis was higher in males (53.77%) as compared to females (52.17%) whereas, relative density was higher in females (61.41%) than in males (52.72%). Intensity (2-3 parasite/host, in both sexes), density (1.36 in males and 1.69 in females) and infection index (0.73 in males and 0.88 in females) were recorded.

Key words

Channa punctatus, Channa striatus, Parasite, Pallisentis, Population dynamics

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