2021, Vol. 1, Issue 2, Part A
Effect of plastic tunnel on pond water temperature and growth and yield performance of golden mahseer (Tor putitora) in carp polyculture system
Author(s): Agni Prasad Nepal, Subodh Sharma, Bibhuti Ranjan Jha, Suresh Kumar Wagle and Tek Bahadur Gurung
Abstract: Golden mahseer (Tor putitora) is an indigenous key stonefish species of Nepal, threatened by anthropogenic activities. Recent studies showed that the golden mahseer could be domesticated and breed in hatcheries. However, many biological aspects of this species are yet to be known such as compatibility with other cultivable carp, and suitability of growth under plastic tunnels. Therefore, in order to evaluate growth performance in polyculture system with and without plastic tunnels, we performed an experiment for 365 days in 12-outdoor earthen ponds of 8-m2 size each. Experimental ponds without plastic cover were considered as treatment-1 (T-1), while ponds covered with plastic tunnel over the surface was treatment-2 (T-2) having six replications for each treatment. The stocking density was 25,000 ha-1 with ratio comprising of 20% mahseer, 40% common carp (Cyprinus carpio) and 40% grass carp (Ctenopharyngodon idella). The average body weight of stocked fish was 1.4±0.3 g, 4.9±1.4 g, 15.7±2.6 g for mahseer, common carp and grass carp, respectively. The fish were fed with farm-made pellet feed having 23% CP at the rate of 3% body weight. The results showed high (98.3%) survival with no mortality of golden mahseer in T-2 with average harvested size 103.6±11.6 g, 228.3±29.1 g and 114.3±23.0 g compare to 90.8±14.8 g 210.0±40.0 g, 107.5±24.3 g in T-1 for golden mahseer, common carp and grass carp, respectively. The average harvested size of golden mahseer and common carp was significantly higher (P<0.05) in T-2 than T-1. So, the overall productivity revealed 21.4% higher in T-2 than T-1. The results imply that polyculture of golden mahseer with carps in plastic tunnel system would be a profitable enterprise for promotion of sustainable small-scale aquaculture.
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How to cite this article:
Agni Prasad Nepal, Subodh Sharma, Bibhuti Ranjan Jha, Suresh Kumar Wagle, Tek Bahadur Gurung. Effect of plastic tunnel on pond water temperature and growth and yield performance of golden mahseer (Tor putitora) in carp polyculture system. Zool Entomol Lett 2021;1(2):31-38.