The legendary hump-backed mahseer Tor sp. of India's River Cauvery: An endemic fish swimming towards extinction?
Authors: Pinder, A.C., Raghavan, R. and Robert Britton, J.
Journal: Endangered Species Research
Volume: 28
Issue: 1
Pages: 11-17
eISSN: 1613-4796
ISSN: 1863-5407
DOI: 10.3354/esr00673
Abstract:The Western Ghats region of India is an area of exceptional freshwater biodiversity and endemism. Mahseer of the genus Tor are considered prized sport fishes of great cultural significance; nevertheless, they are threatened as a result of increasing anthropogenic stressors. In the River Cauvery, the mahseer community comprises a 'blue-finned' and an orange-finned, 'hump-backed' fish. Whilst it is not yet known whether these are distinct species or 2 different phenotypes, evidence suggests that the hump-backed phenotype is endemic to the river, whereas the blue-finned phenotype was introduced in the 1980s. Angler-catch data from a managed fishery on the River Cauvery, gathered between 1998 and 2012 and comprising 23 620 h of fishing effort, revealed that captured individuals ranged in size from 0.45 to 46.8 kg, with the blue-finned phenotype comprising 95% of all captured fish and the remainder being hump-backed. The catch per unit effort (CPUE) of the blue-finned phenotype significantly increased over the study period, while the mean weight of individual fish significantly declined. By contrast, the CPUE of the hump-backed phenotype declined significantly over the period, with individual mean weights significantly increasing. These data suggest a recent recruitment collapse in the hump-backed phenotype resulting in an ageing population that may be headed towards extinction. The introduced blue-finned phenotype, however, continues to recruit strongly, suggesting that the mahseer community of the River Cauvery has undergone considerable shifts in the last 30 yr.
https://eprints.bournemouth.ac.uk/22118/
Source: Scopus
The legendary hump-backed mahseer <i>Tor</i> sp of India's River Cauvery: an endemic fish swimming towards extinction?
Authors: Pinder, A.C., Raghavan, R. and Britton, J.R.
Journal: ENDANGERED SPECIES RESEARCH
Volume: 28
Issue: 1
Pages: 11-17
eISSN: 1613-4796
ISSN: 1863-5407
DOI: 10.3354/esr00673
https://eprints.bournemouth.ac.uk/22118/
Source: Web of Science (Lite)
The legendary hump-back mahseer Tor spp. of India’s River Cauvery: an endemic fish swimming towards extinction?
Authors: Pinder, A., Raghavan, R. and Britton, J.R.
Journal: Endangered Species research
DOI: 10.3354/esr00673
https://eprints.bournemouth.ac.uk/22118/
Source: Manual
Preferred by: Robert Britton
The legendary hump-back mahseer Tor sp. of India’s River Cauvery: an endemic fish swimming towards extinction?
Authors: Pinder, A.C., Raghavan, R. and Britton, J.R.
Journal: Endangered Species research
Volume: 28
Pages: 11-17
ISSN: 1863-5407
Abstract:The Western Ghats region of India is an area of exceptional freshwater biodiversity and endemism. Mahseer of the genus Tor are considered prized sport fishes of great cultural sig- nificance; nevertheless, they are threatened as a result of increasing anthropogenic stressors. In the River Cauvery, the mahseer community comprises a ‘blue-finned’ and an orange-finned, ‘hump-backed’ fish. Whilst it is not yet known whether these are distinct species or 2 different phenotypes, evidence suggests that the hump-backed phenotype is endemic to the river, whereas the blue-finned phenotype was introduced in the 1980s. Angler-catch data from a managed fish- ery on the River Cauvery, gathered between 1998 and 2012 and comprising 23 620 h of fishing effort, revealed that captured individuals ranged in size from 0.45 to 46.8 kg, with the blue-finned phenotype comprising 95 % of all captured fish and the remainder being hump-backed. The catch per unit effort (CPUE) of the blue-finned phenotype significantly increased over the study period, while the mean weight of individual fish significantly declined. By contrast, the CPUE of the hump-backed phenotype declined significantly over the period, with individual mean weights significantly increasing. These data suggest a recent recruitment collapse in the hump-backed phenotype resulting in an ageing population that may be headed towards extinction. The intro- duced blue-finned phenotype, however, continues to recruit strongly, suggesting that the mahseer community of the River Cauvery has undergone considerable shifts in the last 30 yr.
https://eprints.bournemouth.ac.uk/22118/
Source: BURO EPrints