Studies On Some Productive And Reproductive Traits in Fresh Water Fish

The injection of crude piscin piscine pituitary extract to induce ovulation is referred to as ”hypophysation ” and was first successfuily demonstrated by (vonthering,1937). This technique. although still forming the backbone of backbone of many induced induced breeding oparations. has over the intervining years qenerated increasingiy sophisiticated soiutions to the probiem of reproductive refractoriness, to the point where purified qonadtropins,hypothalamic releasing hormones . Reproductive processes are by no means fully impired in captivity . The progressive development of the gonads remains in general, uninhibited up to the final stages of gamets maturetion . and it is only at the point of gamete release that the sequence is arrested . It has been proved possible to intervene successfully at the stage where the needed environmental cues are lacking and topush the process to an aritificial suitable completion .one important way for achievement is through the technique of induced breeding by hormnal manipulation . Thus urgent need is to clarity the output of using hormonal injection to common carp fish in hope of vast mass economic yield and further genetic development present work performance.