World Aquaculture Magazine - June 2017

58 JUNE 2017 • WORLD AQUACULTURE • WWW.WAS.ORG was between 25.3 and 28.7 C. Swim-up fry developed after 17 days and growth parameters were obtained from trials with two different feeds (Table 4). There were no significant differences in mean initial weight, mean final weight, specific growth rate (SGR), daily weight gain (DWG), survival rate, or apparent feed conversion rate (AFCR) for fry fed with different types of feed. Locally prepared feed performed better than commercial feed in all parameters though differences were not statistically significant. Growth of fry fed both types of feed was linear over the rearing period (Fig. 2). The DWG of fry was low and slow growth rate during rearing is a typical characteristic of this species. The survival of fry during present study was considerably greater than that found by Paudel (2003, 33-51.3 percent) and Islam (2002, 83.8-89.4 percent), but similar values documented in FRC (1995, 90.4-92.1 percent) and Acharya (2004, 92 percent). Conclusions Breeding of sahar is possible in the sub-tropical climate of Nepal at temperatures between 17.5 and 28 C. Final maturation occurs very quickly, within 12-24 hours, and many fish were not identified when they were ripe but only after eggs were overly mature. Testing should be conducted more frequently to find ripe female fish during the spawning period. The success of hormone-induced spawning demonstrates new hope for possible mass production of sahar seed. The problem with overmature females might be minimized through induced spawning to attempt synchronous mass spawning. Notes Subhash K. Jha, Jay D. Bista, Narayan P. Pandit and Madhav K. Shrestha, Department of Aquaculture and Fisheries, Agriculture and Forestry University, Rampur, Chitwan, Nepal James S. Diana, School of Natural Resources and Environment, University of Michigan, Ann Arbor, MI 48109-1041 USA Corresponding Author: James S. Diana, jimd@umich.edu Acknowledgments The authors thank the support from the Department of Aquaculture and Fisheries, Agriculture and Forestry University, Rampur, Chitwan, and Fisheries Research Center, Pokhara, Nepal. This research is a component of the AquaFish Innovation Lab, which is supported in part by the US Agency for International Development (USAID CA/LWA No. EPP-A-00-06-0012-00), and in part by participating institutions. The views expressed are those of the authors and do not necessarily reflect those of the AquaFish Innovation Lab or USAID. References Acharya, D. 2004. Polyculture of sahar (Tor putitora) and mixed sex Nile tilapia (Oreochromis niloticus) in Chitwan, Nepal. Master’s thesis (Aquaculture). Institute of Agriculture and Animal Science, Rampur, Chitwan, Nepal. Bista, J.D., B.R. Pradhan, A.K. Rai, R.K. Shrestha and T.B. Gurung. 2001. Nutrition, feed and feeding of golden mahseer (Tor putitora) for domestication and production in Nepal. Paper Presented in Symposium on Cold Water Fish Species in the Trans-Himalayan Region, 10-14 July 2001, Kathmandu, Nepal. Bista, J.D., B.K. Shrestha, A.P. Nepal, S. Prasad, A.P. Baidya, S.K. Wagle and T.B. Gurung. 2010. Spawning response of sahar (Tor putitora) in different seasons under pond reared condition in Pokhara. Book of abstracts on 8th National workshop on Livestock and fisheries Research, June 7-8, 2010 (Jestha 24-25, 2067). Organized by Nepal Agriculture Research Council, National Animal Science Research Institute, Khumaltar, Lalitpur. Bista, J.D., S.K. Wagle, S. Prasad, T.B. Gurung and A.K. Rai. 2007. Growth and maturity of sahar Tor putitora in controlled environment in mid hill Pokhara Valley, Nepal. Page 143 In: Book of Abstracts, Fisheries and Aquaculture: Strategic Outlook for Asia. 8th Asian Fisheries Forum. November 20-23 2007, Kochi, India. Asian Fisheries Society, Indian branch. FRC (Fisheries Research Center). 1995. Breeding of mahseer in natural and artificial condition. Pages 16-19 In: Annual Technical Report. NARC, FRC, Pokhara, Nepal. Gurung, T.B., A.K. Rai, L.P. Joshi, A. Nepal, A.P. Baidya and J.D. Bista. 2002. Breeding of pond reared golden mahseer (Tor putitora) in Pokhara, Nepal. Pages 143-155 In T. Petr and D.B. Swar, editors. Cold Water Fisheries in the Trans-Himalayan Countries. FAO Fisheries Technical Paper. No. 431, Rome, Italy. Islam, M.S. 2002. Evaluation of supplementary feeds for semiintensive pond culture of mahseer, Tor putitora (Hamilton). Aquaculture 212:263-276. Joshi, P.L., T.B. Gurung, S.R. Basnyat and A.P. Nepal. 2002. Domestication of wild golden mahseer and hatchery operation. Pages 173-178 In T. Petr and D.B. Swar, editors. Cold Water Fisheries in the Trans-Himalayan Countries. FAO Technical Paper No. 431, Rome, Italy. Pandey, A.K., R.S. Patiyal, J.C. Upadhyayi, M. Tyagp and P.C. Mahanta. 1998. Induced spawning of the endangered golden mahseer, Tor putitora, with Ovaprim at the State Fish Farm near Dehradun. Indian Journal of Fisheries 45:457-459. Paudel, J.K. 2003. Growth performance of sahar (Tor putitora) in different culture systems in Chitwan, Nepal. Master’s thesis. Agriculture and Forestry University, Chitwan, Nepal. Rai, A.K. 2008. Status of sahar (Tor putitora) domestication and its development in the Himalayan Region of Nepal. Aquaculture Asia Magazine, Jan-March 2008:26-32. Rai, A.K., A.K. Rana and K.B. Bastola. 1997. Comparative growth study of indigenous fish species mahseer, katle and asla fed with local feed ingredients. Journal of Nepal Agricultural Research 1:57-61. Rai. A.K., S.K. Wagle, N. Pradhan, S.R. Basnet, A.P. Baidya, T.B. Gurung, J.D. Bista, M.K. Shrestha and A.B. Thapa. 2006. Status of sahar Tor putitora and its prospects in Nepal. Pages 1-23. First International Symposium of the Mahseer. Kuala Lampur, Malaysia, 29-30 March, 2006. Shrestha, M.K., N.P. Pandit, Y. Yi, J.S. Diana and C.K. Lin. 2005. Integrated cage-cum-pond culture system with high-valued sahar (Tor putitora) suspended in carp polyculture ponds. TwentySecond Annual Technical Report. (pp 97-114) Aquaculture CRSP, Oregon State University, Corvallis, Oregon. Shrestha, M.K., R.L. Sharma, K. Gharti and J.S. Diana. 2011. Polyculture of sahar (Tor putitora) with mixed-sex Nile tilapia. Aquaculture 319:284-289.

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