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in
| 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. |
in
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. |
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FEEDING SYSTEMS, FEEDS AVAILABILITY AND NUTRIENT CONTENT IN THE FEEDS AND FORAGES FOUND IN THE HIGH MOUNTAIN AREAS OF SOLUKHUMBU AND SANKHUASABHA DISTRICT
