Journal of Environment and Sociobiology

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Discovery of a Population of a Virtually Unknown Large Freshwater Bivalve Parreysia rajahensis (Lea, 1841) (Unionoidea : Amblemidae) in the River Subernarekha, India


Affiliations
1 Zoological Survey of India, Gangetic Plains Regional Station, Rajendra Nagar, Patna-800 016, Bihar, India
2 Aquatic Ecology Centre, School of Science, Dep. of Environmental Sciences and Engineering, Kathmandu University, P.O.Box. No. 6250, Dhulikhel, Kavre district, Nepal
     

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Living populations of a large freshwater bivalve. Parreysia rajahensis (Lea, 1841) were found for the first time in the river Subernarekha. This bivalve species was found to occur in six localities of that river in altitudes ranging from 11 m to 196 m above mean sea level. In the middle reach of the river at Moori, Lupungdih and Maubhandar only empty shells of this bivalve species were available. Whereas, living populations of this bivalve were observed in the lower reach of the river at Gopiballabhpur and Jaleshwar. In addition, one living specimen of P. rajahensis was found in Kharkai confluence at Domuhani. Water qualities of the sampling sites were measured and relative abundance of this bivalve species along with its associate benthic molluscs was also estimated.

Keywords

Bivalve, Perreysia rajahensis, Subernarekha River, Population, Water Quality, Abundance.
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  • Discovery of a Population of a Virtually Unknown Large Freshwater Bivalve Parreysia rajahensis (Lea, 1841) (Unionoidea : Amblemidae) in the River Subernarekha, India

Abstract Views: 374  |  PDF Views: 1

Authors

Gopal Sharma
Zoological Survey of India, Gangetic Plains Regional Station, Rajendra Nagar, Patna-800 016, Bihar, India
Hasko Nesemann
Aquatic Ecology Centre, School of Science, Dep. of Environmental Sciences and Engineering, Kathmandu University, P.O.Box. No. 6250, Dhulikhel, Kavre district, Nepal
Subodh Sharma
Aquatic Ecology Centre, School of Science, Dep. of Environmental Sciences and Engineering, Kathmandu University, P.O.Box. No. 6250, Dhulikhel, Kavre district, Nepal

Abstract


Living populations of a large freshwater bivalve. Parreysia rajahensis (Lea, 1841) were found for the first time in the river Subernarekha. This bivalve species was found to occur in six localities of that river in altitudes ranging from 11 m to 196 m above mean sea level. In the middle reach of the river at Moori, Lupungdih and Maubhandar only empty shells of this bivalve species were available. Whereas, living populations of this bivalve were observed in the lower reach of the river at Gopiballabhpur and Jaleshwar. In addition, one living specimen of P. rajahensis was found in Kharkai confluence at Domuhani. Water qualities of the sampling sites were measured and relative abundance of this bivalve species along with its associate benthic molluscs was also estimated.

Keywords


Bivalve, Perreysia rajahensis, Subernarekha River, Population, Water Quality, Abundance.