PENGARUH PERBEDAAN SUHU TERHADAP LAJU PERKEMBANGAN EMBRIO DAN ABNORMALITAS LARVA IKAN KERAPU CANTIK (Epinephelus sp.)

Grouper is the undue hybridisation results grouper or cross-breeding between the tiger grouper (Epinephelus fuscoguttatus) as the parent females and grouper (Epinephelus microdon) batik as a male parent. The main barriers faced in the development of this commodity is still low levels of spawning up to seeding grouper. Based on the background, need to do a test of optimum temperature observations against the rate of embryonic development and Larval cantik grouper abnormality (Epinephelus sp.). This study uses the results of artificial spawning eggs. The fertilized eggs are incubated on 6 pieces of the container temperature treatment each treatment there is a repeated 3 times. The word incubation temperature is (A) 21-22 ℃; (B) 23-24 ℃; (C) 25-26 ℃; (D) 27-28 ℃; (E) 29-30 ℃; (F) 31-32 ℃. The results showed that eggs are incubated at a temperature 21-22 ℃ embryonic development to a halt in the blastula and temperature 23-24 ℃ stalled on phase myomere embryos. On the low-temperature incubation period lasts a long time. Temperature 25-26 ℃ takes 18 hours 6 minutes by 8.33% abnormality rate. Temperature 27-28 takes 16 hours to hatch with a degree of abnormality of 7.6%. Temperature 29-30 takes 15 hours 1 minutes for the hatch to the degree of abnormality of 5.33%. 31-32 temperature takes 14 hours 6 minutes to hatch with a degree of abnormality of 17.3%. The limits of tolerance for the incubation of the eggs of cantik grouper (Epinephelus sp.) is 26-32 ℃. The best temperature of each treatment were obtained at a temperature 29-30 ℃