GONADAL DEVELOPMENT AND SPAWNING FREQUENCY OF TILAPIA (Oreochromis niloticus) THAT FEEDED BY VITAMIN E SUPPLEMENTATION
ABSTRACT: Vitamin E is one of
important micronutrient that influence the performance of fish reproduction.
The purpose of the study was to know then effect of vitamin E on the gonadal
development and spawning frequency of tilapia broodstock. The test diet was
formulated containing 35% of crude protein and 10% of crude fat respectively.
The feed formula was supplemented with vitamin E (level of purity 50%) as much
as A) 0, B) 75, C) 150, D) 225, E) 300 and F) 375 mg/kg feed. One hundred
eighty fishes (6-7 months of age) were used in the study and held in 6 nets in
6000 m 2 pond and water level on 80 cm. Each net was stocked with 20 females
and 10 males of fish and keep for 13 weeks on September until November 2011.
The result of the study showed that supplementation vitamin E in tilapia feed
gave higher value of gonado somatic index than tilapia broodstock without
supplementation of vitamin E in feed. The result also showed that supplementation
vitamin E as much as 225 mg/kg feed gave the highest percentage of maturation
(80%) and the highest value of spawning frequency on female tilapia (22 times
during 13 weeks of maintenance). Based on the evaluation in those parameters it
was concluded that supplementation of α-tocopherol up to 225 mg/kg can be
useful for improving gonadal development, the number of mature female,
percentage of maturation and value of spawning frequency on female tilapia.
Author: Wahyu Pamungkas, Evi
Tahapari, Jadmiko Darmawan
Journal Code: jpbiologigg140008
