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limbs appeared at the age of 18-23 days while for in different bucks. The values of these parameters
forelimbs in 26-31 days. The fully grown tadpole decreased linearly when diluted semen was
attained average total length of 19.0mm (range: preserved up to 3 days. The preserved semen was
16.4-21.1imm; sd±l.48; n=16) comprising 6.0mm used in inseminating the does coming from
(range: 4.8-6.8mm; sd±0.54; n=16) of body and surrounding areas. The conception rate of Al was
13.0mm (range: 11.0-15.2mm; sd±1.20; n=16) tail 50%. The selected bucks had significant effects on
in the age of 39-44 days. From this onward, the growth performance of kids. Selected bucks
regressive changes were found to occur mainly in were found to be superior over random bucks in
the tail and intestine. The long tail with its upper terms of above traits. The heritabilities for growth
and lower fin started to diminish and disappear at traits were high, ranging from 0.62 to 0.88,
the age of 45-51 days. The long coiled intestine indicating that genetic improvement in these traits
reduced greatly and almost become straightened through selective breeding seems to be promising.
out. The metamorphosis was found to be
completed from 10 to 13 days. 464 ISLAM, M.R. (Animal Division, National
Institute of Biotechnology (NIB), Atomic Energy
463 DAS, S.K.; HUSAIN, S.S.; AMIN, M.R.; Research Establishment (AERE), Savar, Dhaka);
HOQUE, M.A.; KHANDOKER, M.A.M.Y. AFROZ, S.; KHANDOKER, M.A. M.Y. &
(Dept. of Animal Breeding and Genetics, AKTER, Q.S. (Reproductive Biotechnology
Bangladesh Agricultural University, Mymensingh) Laboratory, Dept. of Animal Breeding and
& MUNIM, T. (C P (Charon Pokphand) Genetics, Bangladesh Agricultural University,
Bangladesh Limited). Growth Performance of Mymensingh). Motility of Fresh and Diluted Buck
Progeny Using Selected Black Bengal Bucks. Semen Stored at 5°C. Bang. J. Anim. Sci., 2007, 36
Bang. J. Anim. Sci., 2006, 35 (1 & 2), 27-35. (1 & 2), 9-15.
The experiment was conducted at the Artificial The present study was undertaken to evaluate the
Insemination Center of Bangladesh Agricultural effect of storage temperature (5°C) and diluents on
University, Mymensingh and its surrounding area. sperm motility of Black Bengal buck semen.
The quality of semen and the growth performance Semen was collected by the artificial vagina
of progeny of selected and random bucks were (AV) method from four adult bucks, aged
evaluated. Semen characteristics included semen between 34-45 months; body weight and scrotal
volume and pH, sperm concentration and motility circumferences (SC) were ranged from 20.0 to
and presence of live and normal sperm. Semen was 33.6 kg and 20.1 to 21.0 cm respectively. The
diluted and preserved at 4°C and then was individual ejaculate was diluted, using a split-
evaluated at first, second and third day of sample technique, in two different diluents: Tris-
preservation. Birth weight, 3 and 6 month body glucose-citric acid-egg yolk diluents and
weights were included as growth performance of Triladyl-egg yolk diluents. The fresh and diluted
progeny. The selected bucks had significant effects semen were stored at 5°C. Fresh semen was
on semen volume, sperm concentration, sperm evaluated on the basis of sperm motility after 24,
motility and presence of live and normal sperm in 27, 30, 45, 48, 51, 54 and 70 hours of storage.
semen. Significant (P<0.05) effects were found on Initial motility of sperm before cooling were
sperm motility and presence of live and normal ranges from 67.50-80.00%, where the higher
sperm in semen at different periods of preservation sperm motility was found in buck 3 and 1
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