Citation
Thella Rufus, . and Dahanukar Neelesh, . and Eldho P. S., . and Ali Anvar, . and Raghavan Rajeev, . Population dynamics of Wallago attu (Bloch and Schneider 1801) (Osteichthyes Siluridae) in three small rivers of Southern India. pp. 172-178. ISSN 0116-6514
Abstract
The Asian sheat catfish Wallago attu (Bloch and Schneider 1801) is a commercially important species harvested across tropical Asia owing to its high nutritional quality and consumer demand. Population dynamics and exploitation levels of W. attu based on catches from three small ( 245 km) river systems of southern India revealed an asymptotic length (L) of 99.75 cm growth coefficient (K) between 0.89 and 1.3 year- and total mortality rates between 2.23 and 3.36 year- . In each river system the exploitation rate (E) was greater than where the stock is reduced to half its virgin biomass (E50): Achenkovil (0.49 0.33); Pampa (0.51 0.30); Manimala (0.59 0.34) and close to the Emax (exploitation producing maximum relative yield per recruit of 0.58) in some suggesting the immediate need for developing and implementing fishery management plans.
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Abstract
The Asian sheat catfish Wallago attu (Bloch and Schneider 1801) is a commercially important species harvested across tropical Asia owing to its high nutritional quality and consumer demand. Population dynamics and exploitation levels of W. attu based on catches from three small ( 245 km) river systems of southern India revealed an asymptotic length (L) of 99.75 cm growth coefficient (K) between 0.89 and 1.3 year- and total mortality rates between 2.23 and 3.36 year- . In each river system the exploitation rate (E) was greater than where the stock is reduced to half its virgin biomass (E50): Achenkovil (0.49 0.33); Pampa (0.51 0.30); Manimala (0.59 0.34) and close to the Emax (exploitation producing maximum relative yield per recruit of 0.58) in some suggesting the immediate need for developing and implementing fishery management plans.
Additional Metadata
| Item Type: | Article |
|---|---|
| AGROVOC Term: | Freshwater fishes |
| AGROVOC Term: | Freshwater catfish |
| AGROVOC Term: | Wallago attu |
| AGROVOC Term: | Population dynamics |
| AGROVOC Term: | Rivers |
| AGROVOC Term: | Fisheries catches (composition) |
| AGROVOC Term: | Catchment areas |
| AGROVOC Term: | Length |
| AGROVOC Term: | Growth |
| AGROVOC Term: | Mortality |
| Depositing User: | Ms. Suzila Mohamad Kasim |
| Last Modified: | 24 Apr 2025 06:29 |
| URI: | http://webagris.upm.edu.my/id/eprint/24645 |
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