Dr. Arpita Dey - Academia.edu (original) (raw)

Papers by Dr. Arpita Dey

International Journal of Current Microbiology and Applied Sciences, 2018

Botia loaches are high demanding species having both ornamental and economical important food val... more Botia loaches are high demanding species having both ornamental and economical important food value and contribute to a major share of the world market for beautiful coloured indigenous ornamental fish. Their identification is difficult due to morphological variation. Genetic variation amongst the four species namely Botia alomorhae, Botia dario, Botia lohachata and Botia rostrata using mtDNA were studied. Cytochrome Oxidase I (COI) gene (655 bp) was amplified using PCR and sequenced. The pairwise genetic distances among Botia species ranged from 0.002 to 0.112. The interspecies Kimura's 2-parameter pair-wise distance was highest (0.112) between Botia dario and B. lohachata and lowest (0.002) for B.almorhae and B. lohachata. The phylogenetic tree showed that B. almorhae and B. lohachata formed a monophyletic group (supported by 100% bootstrap value). The present study is helpful for identification of the Endangered and Vulnerable Botia species from Eastern Himalayan region and p...

The present study was conducted to generate a primary database on ichthyofauna diversity of river... more The present study was conducted to generate a primary database on ichthyofauna diversity of river Kaljani flowing through Cooch Behar district of West Bengal, India. 138 indigenous fish species belonging to 31 families were identified. The family Cyprinidae represented the largest diversity accommodating 20 genera and 50 species. Amongst all the fishes 58 species have ornamental value and 55 species the food value. Ornamental fishes are dominant over the food fishes and carnivorous fishes are dominant over the omnivorous and herbivorous fishes. According to IUCN (International Union for Conservation of Nature) and CAMP (Conservation Assessment and Management Plan) the conservation status of the fishes are listed as, 1(0.72%) species as Critically Endangered,13(9.42%) species as Endangered 41(29.71%) species as Vulnerable, 35 (25.36%) species as at Lower Risk Near Threatened, 41(29.71%) species as Lower Risk Least Concerned,4 (2.89%)species as Data Deficient and 3(2.17%) species as Not Evaluated. It is concluded, that anthropogenic pressure arising out of agriculture run offs, indiscriminatory use of fishing with new fishing technologies and widespread habitation of people have contributed to the vulnerability of the fish diversity.

International journal of applied research, 2015

The present study was conducted in the Eastern Himalayan region to generate a primary database on... more The present study was conducted in the Eastern Himalayan region to generate a primary database on ichthyofauna diversity of seven rivers in three districts (Cooch Behar, Jalpaiguri and Alipurduar) of West Bengal, India. Out of the seven rivers, five rivers originate from Bhutan ghat hills, and the other two rivers the Teesta, originates from North Sikkim and river Karala from Jalpaiguri. 141 indigenous fish species belonging to 31 families were identified. The family Cyprinidae represented the largest diversity accommodating 21 genera and 46 species. Amongst all the fishes, 99 species have ornamental value and 87 species the food value. Ornamental fishes are dominant over the food fishes and carnivorous fishes are dominant over the omnivorous and herbivorous fishes. According to IUCN (International Union for Conservation of Nature ) and CAMP (Conservation Assessment and Management Plan), the conservation status of the fishes are listed as 1 (1%) species as Critically Endangered, 12 ...

International journal of applied research, 2015

Botia rostrata is an vulnerable species (CAMP, 1998) having high ornamental value. Breeding exper... more Botia rostrata is an vulnerable species (CAMP, 1998) having high ornamental value. Breeding experiments in captivity were conducted successfully for the ornamental fish, Botia rostrata using synthetic hormones. Induced breeding of B. rostrata with WOVA-FH at 0.025 ml per fish was achieved. Sex ratio 1:1 (male: female) were maintained in two trials. These fish spawned only in running water system. The fecundity of females ranged from 14,103 to 21, 352. The average fertilization rate was found to be 67.60%. The present work contributed to the information lacking on induced breeding and breeding behaviour of Botia rostrata.

Botia loaches are high demanding species having both ornamental and economical important food val... more Botia loaches are high demanding species having both ornamental and economical important food value and contribute to a major share of the world market for beautiful coloured indigenous ornamental fish. Their identification is difficult due to morphological variation. Genetic variation amongst the four species namely Botia alomorhae, Botia dario, Botia lohachata and Botia rostrata using mtDNA were studied. Cytochrome Oxidase I (COI) gene (655 bp) was amplified using PCR and sequenced. The pairwise genetic distances among Botia species ranged from 0.002 to 0.112. The interspecies Kimura’s 2parameter pair-wise distance was highest (0.112) between Botia dario and B. lohachata and lowest (0.002) for B.almorhae and B. lohachata. The phylogenetic tree showed that B. almorhae and B. lohachata formed a monophyletic group (supported by 100% bootstrap value). The present study is helpful for identification of the Endangered and Vulnerable Botia species from Eastern Himalayan region and popula...

Journal of entomology and zoology studies, 2015

Botia dario is an vulnerable species (CAMP, 1998) [4] having both ornamental as well as edible va... more Botia dario is an vulnerable species (CAMP, 1998) [4] having both ornamental as well as edible value. Breeding experiments in captivity were conducted successfully for the ornamental fish B. dario in May 2013-2015 using synthetic hormone. This fish spawned only in running water system. The fecundity of the females ranged from 13,880 to 27,510. The average fertilization rate was found to be 82.09 %. The average Gonado-Somatic Index of B. dario for female was 13.21 and for male 3.4. About 14.30-14.40 hours after fertilization the embryo hatched out from the chorion of the egg. The present work contributed to the deficient information on embryonic development, induced breeding and breeding behaviour of B. dario.

International Journal of Multidisciplinary Research and Development, 2015

Zebrafish, 2019

Zebrafish is one of the world's most widely used laboratory species, and it is utilized to answer... more Zebrafish is one of the world's most widely used laboratory species, and it is utilized to answer important research questions in disparate fields such as biomedicine, genetics, developmental biology, pharmacology, toxicology, physiology, and evolution. Despite their popularity, very little is known about the biology of zebrafish in their natural habitat. This may, in part, be due to the difficulties associated with undertaking field trips to the remote areas of northern India, Nepal, and Bangladesh, which is the natural distribution range of zebrafish. Here, we present a field report describing a recent trip where we, together with local collaborators, visited several rivers in West Bengal, India, to observe wild zebrafish and their habitat. We present an overview of our observations on the biology of wild zebrafish, and the great variability of the different environments where they were found. We also include data collected on water chemistry parameters at 12 zebrafish sites, and weight data and photos of fish from these sites. We present extensive underwater videos of wild zebrafish and photographs of the sites, including video footage of courtship behavior. We show that the breeding period of wild zebrafish can be extended from the previous record of April-August to April-October. In addition, we provide practical advice for future zebrafish expeditions to this rural and inaccessible area. The goals of this article are to shed some light on the ecology of wild zebrafish, and to facilitate scientists in their future research trips. We hope that by observing zebrafish in the wild, we can increase our understanding of the natural ecology of this important model organism.

Conservation Physiology, 2019

Model organisms can be useful for studying climate change impacts, but it is unclear whether dome... more Model organisms can be useful for studying climate change impacts, but it is unclear whether domestication to laboratory conditions has altered their thermal tolerance and therefore how representative of wild populations they are. Zebrafish in the wild live in fluctuating thermal environments that potentially reach harmful temperatures. In the laboratory, zebrafish have gone through four decades of domestication and adaptation to stable optimal temperatures with few thermal extremes. If maintaining thermal tolerance is costly or if genetic traits promoting laboratory fitness at optimal temperature differ from genetic traits for high thermal tolerance, the thermal tolerance of laboratory zebrafish could be hypothesized to be lower than that of wild zebrafish. Furthermore, very little is known about the thermal environment of wild zebrafish and how close to their thermal limits they live. Here, we compared the acute upper thermal tolerance (critical thermal maxima; CTmax) of wild zebr...

International Journal of Pure & Applied Bioscience, 2018

A new Channa species described from River Torsa of Brahmaputra river basin, West Bengal, India. C... more A new Channa species described from River Torsa of Brahmaputra river basin, West Bengal, India. Channa torsaensis sp. nov. a new species of Channa, is distinguished from congeners by a combination of the following characters namely a dorsal, anal and caudal fins being bluish with a broad dark blue border having a tinge of orange border covering the dark blue border; dorsal fin with numerous back spots; caudal fin with 9-10 black bands; 5-6 oblique greyish-blue bands present on the body; lateral line pored scales 46 in number; dorsal fin rays 36-38; anal fin rays 22 25; total vertebrae 4445 (16+28).

European Journal of Biotechnology and Bioscience, 2015

Loaches which are quite near to extinction are high demanding fish species having both ornamental... more Loaches which are quite near to extinction are high demanding fish species having both ornamental and edible food value. Their identification is difficult due to morphological variation especially amongst Botia lohachata and Botia almorhae. Genetic diversity and molecular phylogeny among six loaches belonging to genus Botia were studied. Cytochrome Oxidase I (COI) gene (655 bp) was amplified using PCR and sequenced. The pairwise genetic distances among Botia species ranged from 0.004 to 0.200. The interspecies Kimura’s 2parameter pair-wise distance was highest (0.200) between B. modesta and B. lohachata and lowest (0.004) for B. almorhae and B. lohachata. The overall transition/transversion bias is R = 3.084. The phylogenetic tree showed that B. almorhae and B. lohachata formed a monophyletic group (supported by 100% bootstrap value) and then constituted one clade with B. kubotai. Other Asian species B. rostrata, B. striata, B. dario B. modesta and B. macracanthus also contributed t...

International Journal of Current Microbiology and Applied Sciences, 2018

Botia loaches are high demanding species having both ornamental and economical important food val... more Botia loaches are high demanding species having both ornamental and economical important food value and contribute to a major share of the world market for beautiful coloured indigenous ornamental fish. Their identification is difficult due to morphological variation. Genetic variation amongst the four species namely Botia alomorhae, Botia dario, Botia lohachata and Botia rostrata using mtDNA were studied. Cytochrome Oxidase I (COI) gene (655 bp) was amplified using PCR and sequenced. The pairwise genetic distances among Botia species ranged from 0.002 to 0.112. The interspecies Kimura's 2-parameter pair-wise distance was highest (0.112) between Botia dario and B. lohachata and lowest (0.002) for B.almorhae and B. lohachata. The phylogenetic tree showed that B. almorhae and B. lohachata formed a monophyletic group (supported by 100% bootstrap value). The present study is helpful for identification of the Endangered and Vulnerable Botia species from Eastern Himalayan region and p...

The present study was conducted to generate a primary database on ichthyofauna diversity of river... more The present study was conducted to generate a primary database on ichthyofauna diversity of river Kaljani flowing through Cooch Behar district of West Bengal, India. 138 indigenous fish species belonging to 31 families were identified. The family Cyprinidae represented the largest diversity accommodating 20 genera and 50 species. Amongst all the fishes 58 species have ornamental value and 55 species the food value. Ornamental fishes are dominant over the food fishes and carnivorous fishes are dominant over the omnivorous and herbivorous fishes. According to IUCN (International Union for Conservation of Nature) and CAMP (Conservation Assessment and Management Plan) the conservation status of the fishes are listed as, 1(0.72%) species as Critically Endangered,13(9.42%) species as Endangered 41(29.71%) species as Vulnerable, 35 (25.36%) species as at Lower Risk Near Threatened, 41(29.71%) species as Lower Risk Least Concerned,4 (2.89%)species as Data Deficient and 3(2.17%) species as Not Evaluated. It is concluded, that anthropogenic pressure arising out of agriculture run offs, indiscriminatory use of fishing with new fishing technologies and widespread habitation of people have contributed to the vulnerability of the fish diversity.

International journal of applied research, 2015

The present study was conducted in the Eastern Himalayan region to generate a primary database on... more The present study was conducted in the Eastern Himalayan region to generate a primary database on ichthyofauna diversity of seven rivers in three districts (Cooch Behar, Jalpaiguri and Alipurduar) of West Bengal, India. Out of the seven rivers, five rivers originate from Bhutan ghat hills, and the other two rivers the Teesta, originates from North Sikkim and river Karala from Jalpaiguri. 141 indigenous fish species belonging to 31 families were identified. The family Cyprinidae represented the largest diversity accommodating 21 genera and 46 species. Amongst all the fishes, 99 species have ornamental value and 87 species the food value. Ornamental fishes are dominant over the food fishes and carnivorous fishes are dominant over the omnivorous and herbivorous fishes. According to IUCN (International Union for Conservation of Nature ) and CAMP (Conservation Assessment and Management Plan), the conservation status of the fishes are listed as 1 (1%) species as Critically Endangered, 12 ...

International journal of applied research, 2015

Botia rostrata is an vulnerable species (CAMP, 1998) having high ornamental value. Breeding exper... more Botia rostrata is an vulnerable species (CAMP, 1998) having high ornamental value. Breeding experiments in captivity were conducted successfully for the ornamental fish, Botia rostrata using synthetic hormones. Induced breeding of B. rostrata with WOVA-FH at 0.025 ml per fish was achieved. Sex ratio 1:1 (male: female) were maintained in two trials. These fish spawned only in running water system. The fecundity of females ranged from 14,103 to 21, 352. The average fertilization rate was found to be 67.60%. The present work contributed to the information lacking on induced breeding and breeding behaviour of Botia rostrata.

Botia loaches are high demanding species having both ornamental and economical important food val... more Botia loaches are high demanding species having both ornamental and economical important food value and contribute to a major share of the world market for beautiful coloured indigenous ornamental fish. Their identification is difficult due to morphological variation. Genetic variation amongst the four species namely Botia alomorhae, Botia dario, Botia lohachata and Botia rostrata using mtDNA were studied. Cytochrome Oxidase I (COI) gene (655 bp) was amplified using PCR and sequenced. The pairwise genetic distances among Botia species ranged from 0.002 to 0.112. The interspecies Kimura’s 2parameter pair-wise distance was highest (0.112) between Botia dario and B. lohachata and lowest (0.002) for B.almorhae and B. lohachata. The phylogenetic tree showed that B. almorhae and B. lohachata formed a monophyletic group (supported by 100% bootstrap value). The present study is helpful for identification of the Endangered and Vulnerable Botia species from Eastern Himalayan region and popula...

Journal of entomology and zoology studies, 2015

Botia dario is an vulnerable species (CAMP, 1998) [4] having both ornamental as well as edible va... more Botia dario is an vulnerable species (CAMP, 1998) [4] having both ornamental as well as edible value. Breeding experiments in captivity were conducted successfully for the ornamental fish B. dario in May 2013-2015 using synthetic hormone. This fish spawned only in running water system. The fecundity of the females ranged from 13,880 to 27,510. The average fertilization rate was found to be 82.09 %. The average Gonado-Somatic Index of B. dario for female was 13.21 and for male 3.4. About 14.30-14.40 hours after fertilization the embryo hatched out from the chorion of the egg. The present work contributed to the deficient information on embryonic development, induced breeding and breeding behaviour of B. dario.

International Journal of Multidisciplinary Research and Development, 2015

Zebrafish, 2019

Zebrafish is one of the world's most widely used laboratory species, and it is utilized to answer... more Zebrafish is one of the world's most widely used laboratory species, and it is utilized to answer important research questions in disparate fields such as biomedicine, genetics, developmental biology, pharmacology, toxicology, physiology, and evolution. Despite their popularity, very little is known about the biology of zebrafish in their natural habitat. This may, in part, be due to the difficulties associated with undertaking field trips to the remote areas of northern India, Nepal, and Bangladesh, which is the natural distribution range of zebrafish. Here, we present a field report describing a recent trip where we, together with local collaborators, visited several rivers in West Bengal, India, to observe wild zebrafish and their habitat. We present an overview of our observations on the biology of wild zebrafish, and the great variability of the different environments where they were found. We also include data collected on water chemistry parameters at 12 zebrafish sites, and weight data and photos of fish from these sites. We present extensive underwater videos of wild zebrafish and photographs of the sites, including video footage of courtship behavior. We show that the breeding period of wild zebrafish can be extended from the previous record of April-August to April-October. In addition, we provide practical advice for future zebrafish expeditions to this rural and inaccessible area. The goals of this article are to shed some light on the ecology of wild zebrafish, and to facilitate scientists in their future research trips. We hope that by observing zebrafish in the wild, we can increase our understanding of the natural ecology of this important model organism.

Conservation Physiology, 2019

Model organisms can be useful for studying climate change impacts, but it is unclear whether dome... more Model organisms can be useful for studying climate change impacts, but it is unclear whether domestication to laboratory conditions has altered their thermal tolerance and therefore how representative of wild populations they are. Zebrafish in the wild live in fluctuating thermal environments that potentially reach harmful temperatures. In the laboratory, zebrafish have gone through four decades of domestication and adaptation to stable optimal temperatures with few thermal extremes. If maintaining thermal tolerance is costly or if genetic traits promoting laboratory fitness at optimal temperature differ from genetic traits for high thermal tolerance, the thermal tolerance of laboratory zebrafish could be hypothesized to be lower than that of wild zebrafish. Furthermore, very little is known about the thermal environment of wild zebrafish and how close to their thermal limits they live. Here, we compared the acute upper thermal tolerance (critical thermal maxima; CTmax) of wild zebr...

International Journal of Pure & Applied Bioscience, 2018

A new Channa species described from River Torsa of Brahmaputra river basin, West Bengal, India. C... more A new Channa species described from River Torsa of Brahmaputra river basin, West Bengal, India. Channa torsaensis sp. nov. a new species of Channa, is distinguished from congeners by a combination of the following characters namely a dorsal, anal and caudal fins being bluish with a broad dark blue border having a tinge of orange border covering the dark blue border; dorsal fin with numerous back spots; caudal fin with 9-10 black bands; 5-6 oblique greyish-blue bands present on the body; lateral line pored scales 46 in number; dorsal fin rays 36-38; anal fin rays 22 25; total vertebrae 4445 (16+28).

European Journal of Biotechnology and Bioscience, 2015

Loaches which are quite near to extinction are high demanding fish species having both ornamental... more Loaches which are quite near to extinction are high demanding fish species having both ornamental and edible food value. Their identification is difficult due to morphological variation especially amongst Botia lohachata and Botia almorhae. Genetic diversity and molecular phylogeny among six loaches belonging to genus Botia were studied. Cytochrome Oxidase I (COI) gene (655 bp) was amplified using PCR and sequenced. The pairwise genetic distances among Botia species ranged from 0.004 to 0.200. The interspecies Kimura’s 2parameter pair-wise distance was highest (0.200) between B. modesta and B. lohachata and lowest (0.004) for B. almorhae and B. lohachata. The overall transition/transversion bias is R = 3.084. The phylogenetic tree showed that B. almorhae and B. lohachata formed a monophyletic group (supported by 100% bootstrap value) and then constituted one clade with B. kubotai. Other Asian species B. rostrata, B. striata, B. dario B. modesta and B. macracanthus also contributed t...