ABSTRACT: An experiment was executed to evaluate effect of shelter on gonad maturation and spawning of knife fish (Chitala lopis) from June to December in ponds. Four ponds of 200 m2 in dimension size and 70 cm in water depth were divided in two parts as an experimental pond. One unit experiment in each pond was covered by water hyacinth at 50% of total area. After acclimatized, five pairs of the brooder fish was stocked in each experimental unit and fed on live fish of trash fish and tilapia fingerlings at equal proportion every morning for six months of experimental period. Five wood stakes as fertilized eggs sticky were set in every experimental unit and observed at least twice a month. Artificial spawning using ovaprim hormone at 5 cc in doze per kg was conducted. Water quality of experimental unit was observed monthly. The results showed that all males gonad was mature since month – 1, but percentage of gonad maturation of female increased from July to December. Fertilized eggs stick in stake was found monthly, except November. Artificial spawning succeeded, but up to eggs fertilization. Shelter effectively affected in eggs maturation during dry season, namely July to September.
Penulis: Mas Tri Djoko Sunarno, Mas Bayu Syamsunarno
Kode Jurnal: jppertaniandd150818