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the current study showed that supplementation of them were found to be less ripe or damaged.
of vitamin C at 1250 mg/kg feed had significant Collection of milt by stripping the males was not
positive effects on the FCR, SGR, ADG, successful. The testes were taken out and sperm
condition factor while no such differences were were observed to be non-motile and less
observed in feed efficiency in feed utilization developed. In view of stimulating natural
efficiency variables indicating that propagation of S. seenghala, artificial holes (nests)
supplementation of feed with vitamin C can help were constructed in the pond bottom. Each hole
in the better utilization of feed. was 0.7 m in diameter and 0.3 m in depth. A total
of 10 holes were made and then 10 pairs of S.
593 RAHMAN, M.A.; UDDIN, K.M.A. & seenghaa breeders (800-1,200 g) were stocked in
ZAHER, M. (Freshwater Station, Bangladesh the pond. In mid February, 3,000 fry of S.
Fisheries Research Institute, Mymensingh). seenghala with a mean length of 4.60 cm and
Development of artificial breeding techniques for weight of 0.36 g were collected by repeated netting
long-whiskered catfish, Sperata aor and giant river followed by drying of the pond. The fry were then
catfish, Sperata seenghala of Bangladesh. Bang. J. stocked in a nursery pond and fed with commercial
Fish. Res., 2005, 9(1), 11-12. feed (SABINCO starter-1). The average length and
Sperata aor and S. seenghala are the two important weight of the fingerlings were 9.01 cm and 3.95 g,
native catfishes of Bangladesh but commercial respectively and the estimated survival was 60%
farming of these species is not possible due to lack after two months of rearing. S. aor did not respond
of naturally collected or artificially produced seeds to natural spawning. Further study is essential to
for stocking. Attempts were made to develop develop techniques for their successful artificial
techniques for seed production by artificial and natural breeding.
breeding and nursery-rearing of fries of these
catfishes. A total of 60 S. seenghala (750-1,500 g) 594 RAHMAN, M.H. (Dept. of Agricultural
and 10 S. aor (600-1,000 g) broods were collected Extension Education, Bangladesh Agricultural
from the Brahmaputra river-basin and floodplains University, Mymensingh). A study on rural
in Mymensingh region four months prior to their women's empowerment through participation in
breeding season. The collected brood fishes were aquaculture. Bang. J. Fish. Res., 2005, 9(1), 73-76.
reared in separate earthen ponds with
supplementary feeds comprising of rice bran The study was undertaken to understand the rural
(40%), mustard oil cake (29%), fish meal (30%) women's (i) extent of participation in some
and viiamin-premix (1%). Three experiments were selected aquaculture practices and (ii) extent of
conducted to optimize the hormone dose. A total of empowerment through participation in aquaculture
nine S. seenghala females weighing from 750 to program. Data were collected from 200 selected
1,500 g were given an initial and resolving dose of rural women of two districts - Sherpur and
12-20 and 16-24 mg PG/kg body weight, Kishoreganj. Each of the families where the
respectively. The males weighing from 650-950 g selected rural women who were involvedijn
were administered a single dose of 18-26 mg aquaculture under the supervision of two partner
PG/kg body weight at the time of the time of NGOs of DSAP, namely - Foundation for Human
administering the resolving dose to the females. Development (FHD) and Center for Rural and
The females ovulated partially and the eggs were Environmental Development (CRED). Both
examined under a compound microscope, but most conventional and participatory methods of data
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