Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
¥ _,..<br />
ICAR<br />
sites of Kosi River to study the various influencing<br />
effects (e.g. sex, season, location, etc.) on length<br />
weight relationship of Tor putitora.<br />
The fish stocks of Tor putitora of different<br />
age group initially collected from wild are being<br />
reared in pond environment in 2 hired ponds at<br />
Bhimtal (1200 m asl) since October 2005. The<br />
variables related to water quality were identical<br />
for all the brood stock. The fish feed fortified<br />
with MT@50 mglkg of feed was offered to brood<br />
stock of the age of 4 years daily during February<br />
to June. Few prospective fish specimen were<br />
marked and treated with ova prime plus carp PG<br />
On 22 April 2008, the brood stock having<br />
age of 4+ years and treated with MT and drugs<br />
found matured. Two females having weight of280-<br />
310 g and 2 males of 180 and 210 g were stripped<br />
without using Ova prim as a spawning agent. The<br />
fecundity was recorded 4210 eggslkg and the rate<br />
of fertilization was recorded 62%. In mid of June<br />
2008, the untreated bror,d &;;; 1.. of 5+ years of<br />
age was found maturing clearly exhibiting sexual<br />
distinction and free oozing condition in males. On<br />
6<br />
Annual Report 2008-09<br />
September 3,2008, five females (400,420,450,<br />
390 and 610 g) and 11 males (Av.wt 430g) of<br />
5+ found matured. Three pairs stripped without<br />
the use of spawning agent -Ova prim. The<br />
fecundity was calculated 5270 eggs/kg and the<br />
size off egg was 3.1-3.7 mm. After 12 hrs, the<br />
fertilization rate was 78%.<br />
From the present study, it is clearly evident<br />
that the brood stock of golden mahseer (Tor<br />
putitora) can be reared, developed in pond<br />
environment with no difficulty. The maturation<br />
inducing drugs like MT, Pregnan and PG extract<br />
in combination with Ova prime are effective to<br />
induce maturation in the species Himalayan<br />
mahseer.<br />
Similarly the fish stock of snow-trout (S.<br />
richardsonii) being reared in 3 nursery ponds<br />
(15m2) at Champawat @ 8 (18 g), 11.3(57 g)<br />
and 5.3 (85 g) fishes/ m 2 since October 2005<br />
was found matured in June-July 2008.<br />
Rearing of Snow trout (Schizothorax<br />
richardsonii) of two different size groups were<br />
tried in cages. The fishes were fed with artificial
Change language