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Pemberian Suplemen Asam Amino Triptophan sebagai Upaya Menurunkan Kanibalisne Ikan Kerapu Macan (Epinephelus fuscoguttatus)

*Afiyanti Agustina  -  Biological Departement, Diponegoro University, Jl. H. Prof. Sudarto, SH, Tembalang Semarang, Jawa Tengah 50239 Telp. : 024-7460038, Indonesia
Tyas Rini Saraswati  -  Biological Departement, Diponegoro University, Jl. H. Prof. Sudarto, SH, Tembalang Semarang, Jawa Tengah 50239 Telp. : 024-7460038, Indonesia

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Abstract
The aim of this research was controlled the cannibalism of Epinephilus fuscoguttatus germ with tryptophan application in its feeding formulation. Tryptophan was treated for Epinephilus fuscoguttatus germ in the different concentration.Tryptophan is serotonin precursor which can decrease Epinephilus fuscoguttatus
agressifity.This research was using Complete Randomize Design with 4 treatments and 3 replications. The treatments contained P0 (Control); 0,5%;1%;1,5% tryptophan amino acid which were added in its feed.The results of this experiment were indicated that application of 0,5% and 1% tryptophan amino acid in the food could decrease Epinephilus fuscoguttatus germ cannibalism.
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