EFFECT OF PITUITARY EXTRACTS OF CARP, CLARIAS AND OVAPRIM HORMONE ON THE FECUNDITY AND FERTILITY OF THE COMMON CARP, (CYPRINUS CARPIO).
EFFECT OF PITUITARY EXTRACTS OF CARP, CLARIAS AND OVAPRIM HORMONE ON THE FECUNDITY AND FERTILITY OF THE COMMON CARP, (CYPRINUS CARPIO).
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Date
2011-06
Authors
RAMATU, GOMINA OZOHU.
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Abstract
Homoplastic and heteroplastic hypophysation of Cyprinus
carpio was investigated under controlled hatchery conditions.
80 brood stocks consisting of 30 males and 50 females of
Cyprinus carpio and 10 Clarias gariepinus of mean weight of
(1.42 ± 0.035) kg were obtained from Rock Water fish farm in
Jos. 4mg, 5mg and 6mg/kg body weight of acetone dried
pituitary extracts of Carp and Clarias, and 0.4ml, 0.5ml and
0.6ml/kg body weight of ovaprim were used to determine the
dosage that will give the best output in fecundity, fertility and
hatchability in Cyprinus carpio. Standard procedures of
pituitary extraction, stripping and mixing of egg and milt were
used. All the fish administered Carp pituitary extract (control)
spawned and showed significant difference (P < 0.05) in
fecundity, fertility and hatchability in Cyprinus carpio and
spawning was found to be dose dependent. However there was
no spawning in the fish hypophysized with Clarias pituitary
hormone. All the fishes injected with ovaprim spawned,
though spawning was not found to be dose dependent, the
result showed that ovaprim at 0.5ml/kg body weight of fish
had significant effect (p<0.05) when compared to carp pituitary
extract and produced the best output in terms of fecundity,
fertility (93.5%) and hatchability (90.1%) in Cyprinus carpio.
CPE and Ovaprim induces ovulation, fertilization and hatching
in Cyprinus Carpio at any of the three dosages of CPE (4mg,
5mg and 6mg/kg body weight) or Ovaprim (0.4ml, 0.5ml and
0.6ml/kg body weight.
Description
A THESIS SUBMITTED TO THE SCHOOL OF POST GRADUATE
STUDIES, AHMADU BELLO UNIVERSITY ZARIA, IN PARTIAL
FULFILLMENT FOR THE AWARD OF MASTERS OF FISHERIES
(MSC.FISHERIES), DEPARTMENT OF BIOLOGICAL SCIENCES,
FACULTY OF SCIENCE, AHMADU BELLO UNIVERSITY ZARIA,
NIGERIA.
JUNE, 2011
Keywords
EFFECT,, PITUITARY,, EXTRACTS,, CARP,, CLARIAS,, OVAPRIM,, HORMONE,, FECUNDITY,, FERTILITY,, COMMON CARP,, (CYPRINUS CARPIO).