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Behera, S.
- Awareness Level of Fishers for Conservation of Indian Shad Tenualosa ilisha in Three Selected Localities Along Hooghly Estuary in West Bengal
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Authors
Affiliations
1 Department of Fisheries Resource Management, West Bengal University of Animal & Fishery Sciences, Chakgaria, P.O. Panchasayer, Kolkata-700 094, IN
1 Department of Fisheries Resource Management, West Bengal University of Animal & Fishery Sciences, Chakgaria, P.O. Panchasayer, Kolkata-700 094, IN
Source
Journal of Environment and Sociobiology, Vol 12, No Sp Iss (2015), Pagination: 29-30Abstract
Conservation studies in fisheries is multi disciplinary and it needs support of various experts to address the issues. Several issues in conservation and management of hilsa fisheries require both ecological and societal issues. However, the conservation of hilsa in West Bengal is a major issue for remarkable decline of its production because of anthropogenic activities. The present investigation of awareness level of fishers through a pretested questionnaire was administered to fisher population in three localities, such as, Diamond Harbour, Kakdwip and Godakhali during the period of investigation from June, 2013 to December, 2013. It contained 35 items on different aspects of hilsa fisheries, such as, the status and need of education on different aspects. It was administered before and after suitable interventions which included individual contacts, mass contacts, local news papers, posters and leaflets. The present study revealed that 76% population were of a view that hilsa catch is not at equilibrium and it is declining which needs protection (86%). It was attributed to unregulated fishing (78%), environmental factors (90%), fisheries for livelihood (98%) and anthropogenic pressure (76%). There was a significant difference (P<0.05) in awareness level on different items due to various type of interventions.
- Length-Weight Relationship and Condition Factor of Mrigal Cirrhinus mrigala (Hamilton) Reared in Bheries of 24-South Paraganas District in West Bengal
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Authors
Affiliations
1 Dept. of Fisheries Resource Management, West Bengal University of Animal and Fishery Sciences 5, Budherhat Road, Chakgaria, P.O. Panchasayar, Kolkata - 700 094, IN
1 Dept. of Fisheries Resource Management, West Bengal University of Animal and Fishery Sciences 5, Budherhat Road, Chakgaria, P.O. Panchasayar, Kolkata - 700 094, IN
Source
Journal of Environment and Sociobiology, Vol 12, No Sp Iss (2015), Pagination: 45-45Abstract
An attempt was made to study length-weight relationship and condition factor of Indian major carp, mrigal (Cirrhinus mrigala) reared in bheries at Bhamanghata of 24-South Parganas district in West Bengal. Samples of 323 fishes having size range of 127 mm to 334 mm were taken to estimate length-weight relationship. The regression equation was found as logW = -4.239 + 2.753 logL (r = 0.885) for male, logW = -4.388 + 2.823 logL (r = 0.871) for female and logW = -4.372 + 2.797 logL (r = 0.876) for pooled sample and it exhibited significant correlation (P<0.05) between length and weight. It was found that the exponent 'b' value varied significantly from '3' indicating allometric growth. The mean relative condition factor (Kn) was found to vary from 0.94 to 1.14 during the period of investigation. It varied significantly (F11, 11= 3.37, P<0.05) during different months which were attributed to food and feeding habit of fish. The variations in exponent and dynamics of relative condition factor of fish are discussed referring earlier works.- Length-Weight Relationship and Relative Condition Factor of Mrigal Cirrhinus mrigala (Hamilton) Reared in Bheries of 24-South Parganas District in West Bengal
Abstract Views :402 |
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Authors
Affiliations
1 Department of Fisheries Resource Management, West Bengal University of Animal and Fishery Sciences, 5, Budherhat Road, Chakgaria, P.O. Panchasayar, Kolkata – 700 094, IN
1 Department of Fisheries Resource Management, West Bengal University of Animal and Fishery Sciences, 5, Budherhat Road, Chakgaria, P.O. Panchasayar, Kolkata – 700 094, IN
Source
Journal of Environment and Sociobiology, Vol 12, No 2 (2015), Pagination: 201-208Abstract
An attempt was made to study length-weight relationship and relative condition factor of an Indian major carp, mrigal (Cirrhinus mrigala) reared in bheries at Bhamanghata of 24-South Parganas district in West Bengal. Samples of 323 fishes having size range of 127 mm to 334 mm were taken to estimate length-weight relationship. The regression equation was found as logW= -4.239 + 2.753 logL (r=0.885) for male, logW=-4.388 + 2.823 logL (r=0.871) for female and logW= -4.372 + 2.797 logL (r=0.876) for pooled sample and it exhibited significant correlation (P<0.05) between length and weight. It was found that the exponent 'b' value varied significantly from '3' indicating allometric growth. The mean relative condition factor (Kn) was found to vary from 0.94 to 1.14 during the period of investigation. It varied significantly (F11,11=3.37, P<0.05) during different months which were attributed to food and feeding habit of fish.Keywords
Length-Weight Relationship, Relative Condition Factor, Cirrhinus mrigala.References
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- Roy Choudhury, S., Das, S. K., Sahoo, A. K. and Behera, B. K. 2013. Length-weight relationship and condition of Notopterus notopterus (Pallas) from east Kolkata wetland, West Bengal. J. Inland Fish. Soc. India, 45(2) : 47-49.
- Sahoo, J. K., Chand, B. K., Das, S. K. and Saksena, D. N. 2002. Length-weight relationship of Indian major carps under different aqua farming systems in Ganjam district, Orissa. Indian J. Anim. Hlth., 41: 89-94.
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- Shell Disease in Freshwater River Prawn Macrobrachium malcolmsonii (H. Milne Edwards) Due to Induced Infection of Bacterium Aeromonas hydrophilla
Abstract Views :236 |
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Authors
S. Behera
1,
G. N. Patel
2
Affiliations
1 West Bengal University of Animal and Fishery Sciences, Chakgaria campus, West Bengal, Kolkata -700 094, IN
2 Orissa University of Agriculture and Technology, Bhubaneswar, Orissa, IN
1 West Bengal University of Animal and Fishery Sciences, Chakgaria campus, West Bengal, Kolkata -700 094, IN
2 Orissa University of Agriculture and Technology, Bhubaneswar, Orissa, IN
Source
Journal of Environment and Sociobiology, Vol 6, No 1 (2009), Pagination: 39-44Abstract
The present study was conducted for 50 days in the laboratory to assess the typical signs and symptoms of a particular pathogen Aeromonas hydrophilla in a river prawn Macrobrachium malcolmsonii. In this study, bacterium Aeromonas hydrophilla was inoculated to the water medium of the prawn juveniles through immersion method. The juveniles of M. malcolmsonii exhibited the signs and symptoms of shell disease, such as, erratic movement, lethargic in swimming, of feeding, no molting, black spots on the sclerites and necrosed uropods. The bacterium Aeromonas hydrophilla was reisolated from infected juveniles and tested biochemically to confirm one of the causative agent of shell disease.Keywords
Chitinolytic, Inoculation, Juveniles, Sclerites, Melanization.- Sexual Dimorphism and Gonadal Development of Anabas testudineus, Reared in Captive Condition
Abstract Views :247 |
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Authors
Affiliations
1 West Bengal University of Animal and Fishery Sciences, Chakgaria campus, West Bengal, Kolkata–700 094, IN
1 West Bengal University of Animal and Fishery Sciences, Chakgaria campus, West Bengal, Kolkata–700 094, IN