PERFORMA PERTUMBUHAN IKAN KAKAP PUTIH (Lates calcarifer) YANG DIBERI PAKAN IKAN TAMBAN (Sardinella abella) SEGAR DENGAN RASIO BERBEDA TERHADAP BIOMASSA
Authors: Zulfikar Zulfikar , Ahmad Zawawi Muzahar , Miranti Shavika , Raza’i T. Said , Putri Dwi Septiani , Yulianto Tri 
Published: July 2024

Penggunaan pakan buatan (pelet) menjadi komponen biaya terbesar dalam pembesaran ikan kakap putih.  Pemberian pakan segar yang harganya murah merupakan salah satu alternatif untuk menekan biaya pakan. Tujuan penelitian ini yaitu untuk mengevaluasi performa pertumbuhan ikan kakap putih yang diberi pakan ikan segar berbeda persentase. Penelitian dilakukan pada bulan Juni sampai Juli 2022 di keramba jaring apung di Kampung Teluk Air, Kecamatan Bulang, Batam. Rancangan acak lengkap empat perlakuan dan tiga ulangan yang diterapkan pada penelitian ini. Perlakuan tersebut adalah (perlakuan A) pemberian pelet 5% biomassa, (perlakuan B) pemberian ikan segar 5% biomassa, (perlakuan C) pemberian ikan segar 10% biomassa, dan (perlakuan D) pemberian ikan segar 15% biomassa. Data performa pertumbuhan dianalisis dengan analysis of variance dan dilanjutkan dengan uji Duncan. Hasil percobaan memperlihatkan bahwa pemberian ikan segar 5% dari biomassa (perlakuan B) berbeda nyata pada nilai pertumbuhan bobot mutlak, laju pertumbuhan harian, efiensi pakan serta konversi pakannya (P<0,05) dibanding perlakuan lainnya. Nilai pertambahan bobot akhir (56,97 g), pertumbuhan harian (0,95 g hari-1), dan efisiensi pakan (38,80%) dari perlakuan B lebih tinggi dibanding kontrol, sedangkan konversi pakan (2,58) lebih rendah dari perlakuan C dan D. Simpulan penelitian ini adalah bahwa pemberian ikan tamban pada rasio pemberian pakan 5% total bobot ikan memberikan performa pertumbuhan dan feed conversion ratio ikan kakap putih terbaik.The use of artificial feed (pellets) is the highest-cost component in barramundi farming. Providing fresh, cheap feed can significantly reduce feed costs. The study aimed to evaluate the growth performance of barramundi fed with different feeding ratios of fresh sardine. The experiment was conducted from June to July 2022 in floating net cages located in Teluk Air Village, Bulang District, Batam. The experimental units were arranged in a completely randomized design consisting of four treatments and three replications. The feeding treatments were using pelleted artificial feed at 5% (treatment A, control), and fresh sardine at 5% (treatment B), 10% (treatment C), and 15% (treatment D) of the total cultured fish biomass. Growth performance data were analyzed using analysis of variance and continued with the Duncan’s test. The experimental results showed that treatment B had resulted in significant differences in the absolute weight growth, daily growth rate, feed efficiency, and feed conversion (p<0.05) compared to other treatments. The values of final weight gain (56.97 g), daily growth (0.95 g day-1), and survival rate (93.33%) were higher compared to the control, while feed conversion (2.58) was lower than those of C and D treatments. This research concludes that feeding fresh sardine at 5% feeding ratio yields the best growth performance and feed conversion ratio of cultured barramundi.