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Dubey, Vineet Kumar
- Studies on Influences of Sublethal Concentrations of Organophosphate Pesticide-Dimethoate (Rogor), on Gonado Somatic Index (GSI) of Female Common Carp, Cyprinus carpio communis
Abstract Views :256 |
PDF Views:101
Authors
Affiliations
1 P. G. Deptt. of Zoology University of Kashmir, 190006, IN
2 National Bureau of Fish Genetic Resources, Canal Ring Road, P.O. Dilkusha, Lucknow 226002, IN
1 P. G. Deptt. of Zoology University of Kashmir, 190006, IN
2 National Bureau of Fish Genetic Resources, Canal Ring Road, P.O. Dilkusha, Lucknow 226002, IN
Source
Journal of Ecophysiology and Occupational Health, Vol 11, No 3-4 (2011), Pagination: 117-121Abstract
The effect of sublethal concentrations 0.85, 1.20 and 1.53 mg/L of the organophosphate pesticide Dimethoate (Rogor) on the gonadosomatic index of the fish, Cyprinus carpio communis was studied. The Ganado somatic index increased in all control and pesticide treated groups in the investigation but reduction in Gonad somatic index was observed on exposure to the test substance, Dimethoate as compared to control groups. It may be also noted that the reduction in GSI values was maximum at highest concentrations of the organophosphate pesticide in ovaries of the Dimethoate treated fish showed histomorphological disorders. Furthermore, the reduced GSI was found directly proportional to the pesticide concentration and the duration of the exposure.Keywords
Dimethoate, GSI, Sublethal Concentration, Cyprinus carpio communis.- Pattern of Freshwater Fish Diversity, Threats and Issues of Fisheries Management in an Unexplored Tributary of the Ganges Basin, Northern India
Abstract Views :257 |
PDF Views:141
Authors
Shailesh Kumar Mishra
1,
Uttam Kumar Sarkar
1,
Braj Kishor Gupta
1,
Sunil Prakash Trivedi
2,
Vineet Kumar Dubey
1,
Amar Pal
1
Affiliations
1 National Bureau of Fish Genetic Resources, Canal Ring Road, Dilkusha, Lucknow-226002, IN
2 Department of Zoology, University of Lucknow, IN
1 National Bureau of Fish Genetic Resources, Canal Ring Road, Dilkusha, Lucknow-226002, IN
2 Department of Zoology, University of Lucknow, IN
Source
Journal of Ecophysiology and Occupational Health, Vol 11, No 3-4 (2011), Pagination: 149-159Abstract
The present study was conducted to assess the current freshwater fish biodiversity status of an unexplored river Ghaghara, a major tributary of river Ganga in Uttar Pradesh, India. Altogether, 62 species of fish representing 48 genera and 24 families were described. The various diversity index packages have been used to assess the fish diversity and diversity is also correlated with habitat variables. The Cypriniformes was recorded to be the most predominated order, contributing to 41.8% of fish species followed by Siluriformes (36.4%). The study shows that this river supports considerable percentage of food fish (79.0%), aquarium fish (48.4%), highly priced fishes (33.9%) and also sport fish (9.7%). The threat status as per current IUCN Red List criteria showed that most of the species are under lower risk least concern (LRlc) category, however, Indian assessment shows that about 23% fish species under threatened list (EN= 4, VU=10). Several anthropogenic activities like barrages, waste water dumping, over fishing, sedimentation, change in land use pattern etc. were found responsible to threaten the fish diversity. As the threats to fish biodiversity in the Ghaghara river are slowly becoming serious and conservation of fishes has become urgent, and integrated and sustainable fisheries management plan should therefore be developed.Keywords
Fish Diversity, Habitat, Ghaghara River, Biodiversity, India.- When Nature Decides who Stays and who Goes:Priority effects Extirpating the Non-Native Brown Trout Salmo Trutta fario L. Population from a Himalayan River
Abstract Views :276 |
PDF Views:75
Authors
Aashna Sharma
1,
Vineet Kumar Dubey
1,
Prakash Nautiyal
2,
Jeyaraj Antony Johnson
1,
Yogesh Kumar Rawal
3,
Kuppusamy Sivakumar
1
Affiliations
1 No. 18 Chandrabani, Wildlife Institute of India, Dehradun 248 001, IN
2 Aquatic Biodiversity Unit, Department of Zoology and Biotechnology, Hemwati Nandan Bahuguna Garhwal University, Srinagar 249 161, IN
3 Department of Zoology, Panjab University, Chandigarh 160 014, IN
1 No. 18 Chandrabani, Wildlife Institute of India, Dehradun 248 001, IN
2 Aquatic Biodiversity Unit, Department of Zoology and Biotechnology, Hemwati Nandan Bahuguna Garhwal University, Srinagar 249 161, IN
3 Department of Zoology, Panjab University, Chandigarh 160 014, IN
Source
Current Science, Vol 117, No 2 (2019), Pagination: 186-187Abstract
Climate-induced stochastic events bring forth idiosyncratic changes in habitat and community assemblage patterns of an area. Nature governs its priorities in such incidents, where native taxa are preferred over the invasive ‘late-comers’, thus leading to extirpation of the latter, according to the concept of ‘priority effects’1. This stronghold of nature strictly comes into play when an ecosystem is least altered from its natural state. River Asiganga in Uttarakhand, India was chosen as a case study to understand this theory, where cloudburst-induced flash floods are considered to be a reason for the complete wipe-out of non-native brown trout (Salmo trutta fario), leaving behind the native snow trout (Schizothorax species).References
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