The present study aimed to determine the effect of different temperature levels on the hatching rate of common carp eggs. This study consisted of 12 experimental units, in which 4 treatments with 3 replications were applied, namely A (control temperature 22-29 ° C), B (24 ° C), C (temperature 28 ° C), and D (temperature 32 ° C). Temperature, pH, DO and hatching rate was measured for data collection. Analysis of variance (ANOVA) with a confidence level of 95% was performed for statistical analysis. Water quality data were descriptively described. The results showed that the highest number of hatching rate was obtained in treatment D (32 ° C) of 290 (99%), C (28 ° C) of 276 (94%), treatment B (24 ° C) of 251 individuals, and the lowest was observed in treatment A (22-29 ° C) of 242 individuals (83%). Statistically, the temperature of 22-32 ° C did not affect the hatching rate of common carp eggs. ABSTRAK: Penelitian ini bertujuan untuk mengetahui pengaruh tingkatan suhu yang berbeda terhadap daya tetas telur ikan mas. Penelitian ini terdiri dari 12 satuan percobaan, yang mana terdapat 4 perlakuan dengan 3 ulangan yakni A (kontrol suhu 22-29°C), B (24°C), C (suhu 28°C) dan D (suhu 32°C). Parameter uji meliputi suhu, pH, DO dan daya tetas telur (hatching rate). Data yang diperoleh dianalisis menggunakan analisis ragam (ANOVA) dengan tingkat kepercayaan 95% dan jika menunjukkan pengaruh nyata akan dilanjutkan dengan uji Beda Nyata Terkecil (BNT). Data kualitas air dijelaskan secara deskriptif sesuai kelayakan hidup ikan mas. Hasil penelitian menunjukkan bahwa jumlah telur yang menetas terbanyak diperoleh pada perlakuan D (32°C) sebesar 290 ekor (99%), perlakuan C (28°C) sebesar 276 ekor (94%), perlakuan B (24°C) sebesar 251 ekor dan terendah pada perlakuan A (22-29°C) sebesar 242 ekor (83%). Hasil uji statistik menunjukkan bahwa suhu 22-32°C tidak berpengaruh terhadap daya tetas telur Ikan Mas.
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