EFFECT OF SOME ENVIRONMENTAL AND PHYSIOLOGICAL FACTORS ON SOME REPRODUCTIVE PARAMETERS OF MUGIL CAPITO DURING THE BREEDING SEASON.

EFFECT OF SOME ENVIRONMENTAL AND PHYSIOLOGICAL

FACTORS ON SOME REPRODUCTIVE PARAMETERS OF MUGIL

CAPITO DURING THE BREEDING SEASON.
By
M.I. ZAKI*; M.M. EL-GHARABAWY; Z.A. EL-GREISY;

AND H.H. BAGHDADI

*National Institute of Oceanography and Fisheries, Alexandria.
Key Words: Physiology, Reproduction, MugU capito:
ABSTRACT
The effect of some environmental and physiological factors on
reproductive parameters ofMugH capito in Egyptianfishfarm has been
studied. Long photoperiodicity and high temperature had a negative
effect on the gonads of MugH capito during the breeding season
(winter). The change in salinity did not shift the frequency distribution
curve of the egg diameter to a certain direction. Ruman chorionic
gonadotropin (ReG) had a stimulating effect on the gonads ofMugU
capito within the first week of the injection. The spermatozoa
concentration and the volume was affected by the dose ofthis hormone.