Dawa Bhutia

Darjeeling Government College · P. G. Department of Zoology

A review on the geographical distribution of Rufous-throated wren babbler in the Indian Himalayan Region was made based on photographic documentation and available scientific literature. Rufous-throated wren babbler is endemic to Eastern Himalayas and inhabits the dense undergrowth of forests in the Indian states of Arunachal Pradesh, Sikkim and No...

Vermicompost is nutrient-rich casts generated by the earthworms that can be used as biofertilizers. Since the potential of fabricating vermicompost varies amongst species, the present study was conducted to determine the vermicomposting efficiency of local earthworm species of Darjeeling hills and Eisenia fetida, that was subjected to three differe...

Cytochrome P450 3A and its role in metabolism of erythromycin by hepatic microsomes of Indian major carps, Labeo rohita (Ham.), Catla catla (Ham.) and Cirrhinus mrigala (Ham.) Abstract Indian major carps, Labeo rohita, Catla catla and Cirrhinus mrigala were challenged intraperitoneally with a dose of erythromycin (50 mg kg-1 body weight) for 24 hrs...

Cypermethrin being a synthetic pyrethroid, is one of the most widely used pesticide in commercial agricultural applications because of its high effectiveness against target species. Beside its target toxicity it is also highly toxic to other non-target species like fish, bees and aquatic insects. In this study, Channa punctatus was treated with sub...

The very low encounter rate calculated by this study as 0.089/ km even in its historically known suitable habitat justifies the conservation status of Rufous-throated wren-babbler as ‘Near Threatened’ and may get upgraded to ‘Vulnerable’ if the current rate of habitat loss persists.

Use of plants and animals in traditional medicines for healing practices has been common since time immemorial by the people all over the world, and the people of India too are no exception. Darjeeling Himalayan region is characterised by a rich diversity of ethnomedicinal plants as well as rich heritage of traditional medicine practices. This pape...

The aim of this investigation was to assess the effect of a synthetic pyrethroid insecticide cypermethrin on cytochrome P450 of an economically important freshwater catfish, Heteropneustes fossilis in laboratory conditions. The 96 hour median lethal concentration of cypermethrin was found to be 0.0047 ppm, indicating high toxicity of the insecticid...

A survey was carried out to document the amphibian diversity at Takdah Cantonment (27°02'N-88°21'E) in Kurseong Subdivision of District Darjeeling, West Bengal, India, an integral part of the Eastern Himalayas. Time constrained visual encounter survey (VES) method was used for sampling amphibians from all possible habitats of the study area. A tota...

Analyses of chlorpyriphos, ethion and dicofol in the river Deomoni from Terai region of West Bengal revealed mean pesticide residues of chlorpyriphos, dicofol and ethion in water sample as 0.0091 ± 0.0020ppm, 0.0180 ± 0.0071ppm and 0.0892 ± 0.0375 ppm, respectively, in sediments 0.0513 ± 0.0085ppm, 0.0414 ± 0.0045ppm and 0.1271 ± 0.0122ppm and in f...

Induced breeding of climbing perch, Anabas testudineus (Bloch, 1792) was done in aquaria in the laboratory using carp pituitary extract. An intramuscular injection was given with the single dose of 50 mg and 100 mgkg-1 body weight in males and females respectively. The female brood responded to lay eggs at 8-10 h latency period. The breeding perfor...

In this study, Channa punctatus was treated with sub-lethal concentration of cypermethrin (6.6 µg/L) for 5, 10 and 15 days and its effect on total CYP 450 and the activity of hepatic CYP450 isoforms measured. Total CYP450 content and CYP1A mediated EROD activity was significantly induced (p<0.05) in all three treated groups compared to control wher...

Analyses of chlorpyriphos, ethion and dicofol in the river Deomoni from Terai region of West Bengal revealed mean pesticide residues of chlorpyriphos, dicofol and ethion in water sample as 0.0091 ± 0.0020ppm, 0.0180 ± 0.0071ppm and 0.0892 ± 0.0375 ppm, respectively, in sediments 0.0513 ± 0.0085ppm, 0.0414 ± 0.0045ppm and 0.1271 ± 0.0122ppm and in f...

In this study, Channa punctatus was treated with sub-lethal concentration of cypermethrin (6.6 µg/L) for 5, 10 and 15 days and its effect on total CYP 450 and the activity of hepatic CYP450 isoforms measured. Total CYP450 content and CYP1A mediated EROD activity was significantly induced (p<0.05) in all three treated groups compared to control wher...

Cypermethrin (alpha-cyano-3-phenoxybenzyl ester of 2,2-dimethyl-3-(2,2-dichlorovinyl) cyclopropane carboxylic acid) is a synthetic pyrethroid. It is one of the most widely used pesticide in commercial agricultural applications because of its high effectiveness against target species. Beside its target toxicity it is also highly toxic to other non-t...