Journal of Environmental Biology
pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP
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Abstract - Issue 2 2012, 33 (2) Back
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Population
dynamics of a parasite Pallisentis in two
species of fish Channa punctatus
and Channa striatus Author Details |
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(Corresponding author) |
Department
of Animal Science, e-mail:
guptagrawal@rediffmail.com |
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Department
of Animal Science, |
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Department
of Zoology, |
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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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