ABSTRAK
Pakan merupakan salah satu faktor eksternal yang mempengaruhi pertumbuhan ikan. Nutrisi lengkap seperti karbohidrat, protein, lemak, mineral dan vitamin dibutuhkan ikan untuk menggantikan jaringan tubuh yang rusak, sumber energi, pematangan gonad dan untuk pertumbuhan. Ulva lactuca mengandung nutrisi berupa karbohidrat, protein, serat, air, mineral, vitamin A, vitamin B1 dan vitamin B2. Tujuan penelitian ini adalah untuk mengetahui pengaruh pemberian pakan buatan substitusi 10% dan 15% Ulva lactuca dengan sumber protein tepung maggot terhadap pertumbuhan dan kelangsungan hidup ikan nila larasati (Oreochromis niloticus). Hasil penelitian menunjukkan pertambahan bobot badan ikan nila larasati yang diberi pakan K1, P0, P1 dan P2 berturut-turut adalah 30,1 g, 23,63 g, 24,68 g, 25,07 g. Sedangkan tingkat kelangsungan hidup ikan nila lararasati yang diberi pakan K1, P0, P1 dan P2 berturut-turut adalah 76,67%, 60%, 70% dan 50%. Kematian ikan nila larasati disebabkan oleh proses aklimatisasi yang tidak lama dan terserang bakteri Streptococcus agalactiae. Kualitas air selama penelitian masih dalam ambang batas normal.
ABSTRACT
Feed is one of the external factors that influence fish growth. Complete nutrients such as carbohydrates, proteins, fats, minerals and vitamins are needed by fish to replace damaged body tissue, a source of energy, ripening the gonads and for growth. Ulva lactuca contains nutrients in the form of carbohydrates, protein, fiber, water, minerals, vitamin A, vitamin B1 and vitamin B2. The purpose of this study was to determine the effect of substituting 10% and 15% Ulva lactuca with protein source maggot flour on the growth and survival of larasati tilapia (Oreochromis niloticus). The results showed that the body weight gain of larasati tilapia fed K1, P0, P1 and P2 were 30.1 g, 23.63 g, 24.68 g, 25.07 g, respectively. Meanwhile, the survival rate of lararasati tilapia fed K1, P0, P1 and P2 were 76.67%, 60%, 70% and 50%, respectively. Larasati tilapia mortality was caused by the acclimatization process that was not long and attacked by Streptococcus agalactiae bacteria. The water quality during the study was still within normal limits. |
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