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Cyclops. Diaptomus, Eucyclops, Mesocyclops, nursery ponds. A positive heterosis of 55.76% was
Moina, Daphniasoma, Asplanchna, Brachionus, obtained in the hybrid. The growth rates of the
Fillinia, Keratella and Nothalca. reciprocal hybrids were separately observed and
the Jamuna male x Hatchery female hybrid was
549 ISLAM, M.A.; BEGUM, M.; ALAM, found better. The rates of fertilization, hatching
M.J.; PAL, H. K. & SHAH, M.M.R. (Bangladesh and deformity of the developing embryos were
Fisheries Research Institute, Khulna). Growth and calculated for the two strains and for the reciprocal
Survival of Estuarine Catfish (Mystus Gulio Ham.) hybrids. The hatchery strain had lower rates of
Larvae Fed on Live and Prepared Feeds. Bang. J. fertilization and hatching, but higher rate of
Zool., 2007, 35(2), 325-330. deformity than the Jamuna strain. In the hybrids,
however, the rates were above intermediate level
An experiment was conducted for a period of 21 between the two in all the three cases. The
days to study the effect of live feed (Artemia sp.) implications of the results have been discussed.
and two prepared feeds on the growth and survival
of seven days old estuarine catfish (Mystus gulio 551 ISLAM, M.S. (Dept. of Agricultural
Ham.) larvae. The larvae fed with live feed Economics, Bangladesh Agricultural University,
(Artemia sp.) showed significantly (P<0.05) higher Mymensingh). Fish seed production and marketing
growth (length gain 14.39 mm and weight gain in some selected areas of Bangladesh. Bang. J.
78.66 mg), survival rate (67.33%) and specific Fish. Res., 2005, 9(1), 95-96.
growth rate (19.56%/day) compared to those fed
with artificial feed II (30% egg+ 30% milk powder The main objective of the study was to assess the
+30% yeast) and feed III (45% yeast + 45% production and marketing system of fish seed and
fishmeal). Wheat flour (8%), vitamin premix (1%) examining the demand for and supply of fry and
and fish oil (1%) were common for feed II and III. fingerlings in some selected areas viz.
There was no significant difference (P>0.05) in Mymensingh, Netrokona and Tangail in
growth, survival rate and specific growth rate Bangladesh. The present study selected the related
(SGR) of the larvae fed with feed II and feed III. stakeholders like 20 Fish Seed Multiplication
Farms (FSMF) owners, 80 nursery operators, 20
550 ISLAM, M.R. & SHAH, M.S. (Fisheries fry traders and 90 fish farmers who are the
and Marine Resource Technology Discipline, beneficiaries and directly involved with the fish
Khulna University, Khulna). Positive Heterosis in seed production and supply chain, and marketing
F 1 Hybrid of Rohu (Labeo Rohita) Strains From system of fish seed. In case of nursing and rearing
Jamuna River and a Local Hatchery From Jessore, fingerlings, only those stakeholders (nurserers and
Bangladesh. Bang. J. Zool., 2007, 35(1), 131-139. fish farmers) attached with NGOs were selected
At the backdrop of reports on the decline of growth and the NGOs were GRAMUS, SARA and ORD
and reproduction of the hatchery population of from Mymensingh and SATU from Tangail
rohu, Labeo rohita, an experiment was undertaken district. Data were collected for the period 2004 -
to see if there is heterotic effect in inter-strain 2005 and most analyses were done by using tables
crossing between Jamuna river and hatchery- and flow chart to determine production and
produced strain of rohu. Two reciprocal crosses marketing system of fish seed.
were made and the spawn produced were tested for
growth with the parental strains for seven weeks in
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