The occurence of the least pipistrelle Bat, Pipistrellus tenuis (Temminck, 1840) (Chiroptera: Vespertilionidae) in Goalpara District, Assam, India

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Research Paper 07/01/2023
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The occurence of the least pipistrelle Bat, Pipistrellus tenuis (Temminck, 1840) (Chiroptera: Vespertilionidae) in Goalpara District, Assam, India

Jugal Kishore Talukdar, Akshay Kumar Haloi
J. Bio. Env. Sci.22( 1), 41-49, January 2023.
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Abstract

A recent survey identified a colony of Pipistrellus tenuis (n = 5) in Kanyakuchi Pahar village (26°00’32.8″N 90°53’29.0″E), a rural remote site situated at Goalpara district of Assam. This species, commonly known as the Least Pipistrelle, was previously reported by Hinton and Lindsay (1926), Sinha (1999), Ghosh (2008), Saikia et al. (2011) and Boro et al. (2018) from different parts of Assam. The Goalpara district of western Assam is encircled by the foothills of Meghalaya to the South and the Brahmaputra River to the North possesses a variety of flora and fauna due to the dense foliage of the high forest canopy. The climatic condition of the region along with its topography favours roosting of bat population. The distribution of the bat species P. tenuis in the surveyed area has not been previously recorded. For the purpose of taxonomic identification, morphometric parameters (external and cranio-dental measurements) were compared to standard literature by Bates and Harrison (1997). Captured bat specimens (n=3) were examined at the ZSI (Zoological Survey of India), NERC-Shillong, Meghalaya. The recorded mean body weight of captured specimens was 2.61g ± 0.160 (S.D) and the mean forearm length (FA) was 27.39mm ± 0.165 (S.D). This manuscript validates sightings of this bat species at the study location, compares its morphometric and cranio-dental traits to standard literature (Bates and Harrison, 1997) for identification, discusses its distribution as well as its ecological importance.

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