Title :	Breeding Behaviour Of Sahar, Tor Putitora
Material Type:	printed text
Authors:	A. P. Nepal, Author ; Basnet, S.R., Author ; Lamsal, G.P., Author
Pagination:	69-75 p.
Languages :	English (eng)
Abstract:	Broods of Sahar from the wild stock have been rearing in the earthen ponds at Fisheries Research Station (FRS), Trishuli since 1989 to domesticate and study their spawning behaviour. Spawner had spawned off and on in the past. However, they have spawned every yearfor 3-4 years period. Some F, brood ofSahar produced at Station, and are the offspring of wild collection brood also started to spawn since 2000. As usual spawner fish were checked weekly from March to May, the early spawning period and from October to November as the late spawning period of Sahar. Altogether 11 spawner with an average weight of 4. 5 - 6. 0 kg in 1998/'99, 5 spawner with an average weight of 6. 6 - 7. 5 kg in 19991'00 and 6 spawner in 2000/'01with an average weight of2.2- 4.3 kg was subjected to hand stripping. The spawner released collectively 189610, 138950 and 92945 eggs in 1998/'99, 19991'00 and 2000/'01, respectively. The average fecundity (eggs per kg of body weight) of the female was nearly 1000 to 6000 eggs. Fertility was good over 80% and hatchibility remained more than 66 percent. Eggs, with average diameter 2. 0 to 2. 9 mm hatched out after 84 - 125 hours of total incubation period at temperature ranged from 19 to 2 2 oc.

Breeding Behaviour Of Sahar, Tor Putitora [printed text] / A. P. Nepal, Author ; Basnet, S.R., Author ; Lamsal, G.P., Author . - [s.d.] . - 69-75 p.
Languages : English (eng)

Abstract:

Broods of Sahar from the wild stock have been rearing in the earthen ponds at Fisheries Research Station (FRS), Trishuli since 1989 to domesticate and study their spawning behaviour. Spawner had spawned off and on in the past. However, they have spawned every yearfor 3-4 years period. Some F, brood ofSahar produced at Station, and are the offspring of wild collection brood also started to spawn since 2000. As usual spawner fish were checked weekly from March to May, the early spawning period and from October to November as the late spawning period of Sahar. Altogether 11 spawner with an average weight of 4. 5 - 6. 0 kg in 1998/'99, 5 spawner with an average weight of 6. 6 - 7. 5 kg in 19991'00 and 6 spawner in 2000/'01with an average weight of2.2- 4.3 kg was subjected to hand stripping. The spawner released collectively 189610, 138950 and 92945 eggs in 1998/'99, 19991'00 and 2000/'01, respectively. The average fecundity (eggs per kg of body weight) of the female was nearly 1000 to 6000 eggs. Fertility was good over 80% and hatchibility remained more than 66 percent. Eggs, with average diameter 2. 0 to 2. 9 mm hatched out after 84 - 125 hours of total incubation period at temperature ranged from 19 to 2 2 oc.