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Saugata Basu ¹, Biplob Kumar Modak ², Durga P. Haldar ³

Affiliations
1 Department of Biology, Uttarpara Govt. High School, Uttarpara, Hooghly - 712258, West Bengal, IN
2 Dept. of Zoology, Sidho-Kanho-Birsha University, Purulia - 723101, West Bengal, IN
3 Protozoology Laboratory, Department of Zoology, University of Kalyani, Kalyani - 741235, West Bengal, IN

Abstract

The genus Thelohanellus Kudo, 1933 is a member of the Class Myxosporea in the Phylum Myxozoa. Spores of the genus Thelohanellus Kudo are tear-shaped, pyriform or ellipsoidal in valvular view and tear-shaped or pyriform in sutural view. Spores with spore valves are always smooth and devoid of any outgrowth. They are characterized by single pyriform or tear-shaped polar capsule with single coiled polar filament; binucleate sporoplasm mostly with polysaccharide inclusion. Members of this genus have large polysporous plasmodia with pansporoblast formation. They are histozoic parasites of freshwater fishes representing about 75 species with Thelohanellus pyriformis Thelohan, 1892 as the type species. So far, 32 species of the genus Thelohanellus are known to occur in India. In this communication, their recognition, biology and pathogenicity, if any, are summarised.

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Saugata Basu ¹, Biplob Kr. Modak ², Durga P. Haldar ³

Affiliations
1 Department of Biology, Uttarpara Government High School, P.O. Uttarpara, Dist Hooghly, PIN 712 258, West Bengal, IN
2 A.M. College, P.O. Jhalda, Dist. Purulia, PIN 723 202, West Bengal, IN
3 Department of Zoology, University of Kalyani, Kalyani-741235, West Bengal, IN

Abstract

The paper records the prevalence of two major groups of protozoan fish parasites, viz., myxozoans (Myxozoa : Myxosporea : Bivalvulida) and trichodinids (Ciliophora : Mobilina : Trichodinidae) in pure and hybrid carps reared in three pisciculture ponds at Jhalda in Purulia, West Bengal. It has been revealed that infection rate was remarkably higher in hybrid carps. Monthly prevalence of these parasites obtained during the study period along with month-wise analysis of physical and chemical environmental parameters of pond water have also been incorporated.

Keywords

Pure and Hybrid Carps, Myxosporeans, Trichodinids, Prevalence, Purulia, West Bengal.

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Saugata Basu ¹, Biplob Kr. Modak ², Durga P. Haldar ³

Affiliations
1 Department of Biology, Uttarpara Government High School, P.O. Uttarpara, Hooghly-712 258 West Bengal, IN
2 A.M. College, P.O. Jhalda, Dist. Purulia-723 202, West Bengal, IN
3 Department of Zoology, University of Kalyani, Kalyani-741235, West Bengal, IN

Abstract

The genus Myxobolus Butschli, 1882 belongs to the class Myxosporea under the phylum Myxozoa. Large number of species have been described under this genus by different workers from various parts of this world. From food fishes of south Bengal, eleven species of Myxobolus were described by the present workers during 1998-2009. Brief diagnosis along with morphometric data of these species is communicated in the present paper.

Keywords

Myxobolus, Diversity, Food Fishes, South Bengal.

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