Immersion Effect of Estradiol-17β on Cannibalism of Asian Redtail Catfish (<I>Hemibagrus nemurus</I>) Post Larvae

Highlight Research The dose, duration of immersion, and time interval immersion the estradiol-17β affect rate cannibalism increase seed survival Asian redtail catfish in low treatment this research. Over optimum increased incidence at decrease growth performance. Treatment estradiol-17β, give ability to live on high density has an effect concentration plasma body testosterone cortisol Abstract cannibalistic behavior greatly hampers supply these fish seeds, invoking need be controlled. Estradiol is one hormones that been known reduce fish. This study aimed evaluate rearing post larvae catfish. Post was treated with a combination doses estradiol hormone 0, 1, 2 ppm two four hours intervals three six days completely randomized design. Each had 10 L-1, mean size individual length 6.73 ± 0.73 mm (three age after hatched), replications. Fish were fed tubifex up until satiation point reared for 30 days. results showed administration through dose 1 able level survivability. A further time, opposite effect. Estradiol-17β certain duration, affected cannibalism, rate, survival. best normal mortality