Title :	SPW ANING }:lEHA VIOUR OF SAHAR, Tor putitora
Material Type:	printed text
Authors:	Basnyat, S.R., Author ; Lamsal, G.P., Author ; Agni Prasad Nepal, Author
Pagination:	85-89 p.
Languages :	English (eng)
Abstract:	Sahar (!'or putitora) is an indigenous game fish species. Its population is declining in natural water bodies of the country year by year because of overfishing, electrocutting, poisoning and degradation of aquatic environment. Development of seed production technology of this species is essential to restore its population abundance in natural water resources and to erplore the possibility of high value commercial fish farming. With this in view, broods of Sahar from the wild stock were reared in the earthen ponds at Agriculture Research Station,Fish (ARSF), Trishuli since 1989 to study their spawning behavior. Spawner had spawned on and off in the past. However, they did not spawn every year. Spawners were checked weekly from March to May, the first spawning period of Sahar. Altogether 11 spawners out of 20 with an average weight of 4. 0-6.0 kg were subjected to hand stripping. Collectively 1,89,610 eggs were released by the spawners. The average fecundity per kg body weight of the female was nearly 3100 eggs. Fertility was excellent, over 90 per cent and hatchi bi lity remained at 81 per cent. Eggs, ranging from 2.25 to 2.80 mm in diameter, hatched out 60-80 hours after incubation at temperature ranging from 1~.5 to 20.4 °c.

SPW ANING }:lEHA VIOUR OF SAHAR, Tor putitora [printed text] / Basnyat, S.R., Author ; Lamsal, G.P., Author ; Agni Prasad Nepal, Author . - [s.d.] . - 85-89 p.
Languages : English (eng)

Abstract:

Sahar (!'or putitora) is an indigenous game fish species. Its population is declining in natural water bodies of the country year by year because of overfishing, electrocutting, poisoning and degradation of aquatic environment. Development of seed production technology of this species is essential to restore its population abundance in natural water resources and to erplore the possibility of high value commercial fish farming. With this in view, broods of Sahar from the wild stock were reared in the earthen ponds at Agriculture Research Station,Fish (ARSF), Trishuli since 1989 to study their spawning behavior. Spawner had spawned on and off in the past. However, they did not spawn every year. Spawners were checked weekly from March to May, the first spawning period of Sahar. Altogether 11 spawners out of 20 with an average weight of 4. 0-6.0 kg were subjected to hand stripping. Collectively 1,89,610 eggs were released by the spawners. The average fecundity per kg body weight of the female was nearly 3100 eggs. Fertility was excellent, over 90 per cent and hatchi bi lity remained at 81 per cent. Eggs, ranging from 2.25 to 2.80 mm in diameter, hatched out 60-80 hours after incubation at temperature ranging from 1~.5 to 20.4 °c.