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International Journal of Fisheries and Aquatic Studies
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(ICV-Poland) Impact Value: 76.37, Impact Factor: RJIF 5.69
E-ISSN: 2347-5129, P-ISSN: 2394-0506

International Journal of Fisheries and Aquatic Studies

2013, Vol. 1, Issue 2, Part A

Establishment of dry-down hypoxic stress treatment protocol for snakehead freshwater fish, Channa striatus


Author(s): S. D. Mohapatra, K. Kumar, P. Jayasankar, H. K. Barman

Abstract: The air-breathing fish, Channa striatus can survive in muddy and marshy water. It is a hypoxia tolerant species. Hypoxia tolerance linked investigations for large-bodied fishes are limited in the absence of suitable laboratory-protocol. Here, a dry-down approach for hypoxia treatment in FRP (fiberglass reinforced plastics) tanks containing pond-mud and freshwater was investigated for 61 days. This facilitated lowering of dissolved oxygen (~0.15 mg/L from 39 days) in hypoxic tanks compared to ≥3.5 mg/L normoxic tanks. Hypoxia exposed fishes preferred benthic habitat with reduced locomotives and hibernated under soft-mud, whereas normoxic fishes remained active with normal air-gulping. Lactate dehydrogenase, an anaerobic glycolytic enzyme, levels were elevated in serum, liver, muscle and brain of hypoxic fishes. The heightened hsp90β gene, a stress marker, expression in hypoxic fishes was also documented. Such striking differences on the behavioral and metabolic levels were indicative of successful hypoxia stress treatment. Thus, a laboratory-based rearing protocol for investigating long-term hypoxia stress tolerance in C. striatus was established. This will also have future implications in extending this protocol in other fish species.

Pages: 36-39  |  902 Views  12 Downloads

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How to cite this article:
S. D. Mohapatra, K. Kumar, P. Jayasankar, H. K. Barman. Establishment of dry-down hypoxic stress treatment protocol for snakehead freshwater fish, Channa striatus. Int J Fish Aquat Stud 2013;1(2):36-39.
International Journal of Fisheries and Aquatic Studies