Seasonal prevalence of endoparasites and their impact on changes in histology, protein content and digestive enzymes of Labeo rohita
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Date
2020
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Punjab Agricultural University, Ludhiana
Abstract
The parasitic prevalence (%) in gills and intestine and liver of Labeo rohita was studied
during winter, summer, monsoon and post monsoon seasons(December, 2018-November,
2019) at two locations i.e. Fish market, Ludhiana and pond of School of Organic Farming,
PAU, Ludhiana. The gill parasites recovered were Myxobolus sp., Trichodina sp.
Metacercaria, Thelohanellus sp. and development stages of Helminth. The parasitic
prevalence (%) of gills parasites was higher during summer, monsoon, post monsoon (10075%)
and lowest in winter (75-62.5%). The intestine endoparasites recovered were Cestode
Larva, Nematode larva and development stages of Helminth. The intestinal endoparasitic
prevalence in fishes was high during summer and monsoon (75- 62.5%) and low during post
monsoon and winter (25- 37.5%). The histopathological studies showed parasites damaged the
gill by fusion, swelling and loss of gill lamellae, even parasite embedded in gill lamellae and
in intestine (cestode larvae)caused villi distortion and goblet cell hyperplasia, also distorted
villi with oocyst in intestinal wall. Liver showed fatty change and sinusoidal congestion with
no parasite recovered. The total fishes showed non-significant difference in protein content
(mg/g) of muscles of intestinal endoparasite infected and non- infected fishes at both
locations. The protein content (mg/g) of intestine, activity of proteases and specific activity of
ACP was observed to be significantly higher in non- infected fishes. The specific activity of
ALP was significantly higher in infected fishes.
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Sharma, Srishty (2020). Seasonal prevalence of endoparasites and their impact on changes in histology, protein content and digestive enzymes of Labeo rohita (Unpublished M.Sc. thesis). Punjab Agricultural University, Ludhiana, Punjab, India.