Ikan nila merupakan ikan omnivora yang membutuhkan sumber protein yang berasal dari protein nabati dan hewani untuk keseimbangan nutrisinya. Penggunaan bahan baku dari daun talas dan limbah ikan rucah, dapat menjadi alternatif pakan yang murah, mudah di dapat, namun memerlukan kajian mengenai rasio penggunaannya dalam formulasi pakan buatan. Riset ini bertujuan untuk menganalisis efektivitas penggunaan daun talas (Colocasia esculenta) dan kombinasinya dengan tepung ikan rucah subtusi pada ikan nila (Oreochromis niloticus). Penelitian dilakukan secara eksperimental dengan Rancangan Acak Lengkap (RAL 4×4), terdiri dari penggunaan tepung daun talas (DT) dan subtitusi tepung ikan oleh tepung ikan rucah (IR), yaitu A (kontrol), B (15% DT), C (20% DT + tepung ikan rucah subtitusi 50%), dan D (25% DT + tepung ikan rucah subtitusi 100%). Hasil analisis menunjukkan bahwa penggunaan DT dan IR, tidak berefek negatif terhadap kelangsungan hidup ikan dan kualitas air. Rasio konversi pakan dan efisiensi pakan terbaik diperoleh pada perlakuan C (20% DT dengan subtitusi 50% IR),yaitu masing-masing sebesar 3,09 ± 0,098 dan 32,36 ± 1,089 sehingga dapat digunakan sebagai sumber protein pakan pengganti bungkil kedele dan tepung ikan pada ikan nila.
The research aims to analyze the effect of the combination of trash fish meal and taro leaves flour on juvenile tilapia (Oreochromis niloticus) growth performance, the sinking rate of the pellets, and the best ratio of combination feeds that can increase juvenile tilapia growth performance. Juvenile tilapia with a length of 5-8 cm and weight of 7.27 ± 2.12 g were reared for 42 days in the aquarium 25 L with a stocking density of ten fishes. The experiment used was a completed random design consisting of 4 treatments and four replications. Treatment A (control), B (15% taro leaf flour), C (substitution of fish meal by 50% trash fish meal) in combination with 20% taro leaf flour, and D (substitution fish meal by 100% trash fish meal) in combination with 25% of taro leaf flour. The results showed that a combination feed of trash fish meal and wild taro flour as a source of protein juvenile tilapia significantly different (P = 0.05) on the tilapia growth performance and the sinking rate of fish feed. Treatment C has the highest SGR (1.01 ± 0.55 g) with a feed sinking rate of 1.95 cms-1. So that the combination can reduce the level of use of fish meal and soybean meal.
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