Pengayaan Daphina sp. dengan Susu Komersial untuk Meningkatkan Pertumbuhan Benih Ikan Mas Koki Ranchu Carassius auratus

Abstract

Ikan mas koki ranchu Carassius auratus termasuk komoditas ikan hias bernilai ekonomi tinggi, namun pertumbuhan pada fase benih relatif lambat. Peningkatan kualitas pakan alami melalui pengayaan nutrisi merupakan salah satu solusi. Penelitian ini memberikan rekomendasi mengenai dosis optimal pengayaan nutrisi Daphnia sp. menggunakan susu komersial, serta menyajikan informasi tambahan bagi pembudidaya ikan mas koki ranchu dalam upaya meningkatkan pertumbuhan benih. Penelitian menggunakan Rancangan Acak Lengkap dengan tiga perlakuan: kontrol (tanpa pengayaan), pemberian susu komersil dosis 0,6 g/L (A), dan pemberian susu komersil dosis 1,2 g/L (B), masing-masing tiga ulangan. Parameter yang diamati meliputi pertumbuhan panjang mutlak, bobot mutlak, laju pertumbuhan spesifik, efisiensi pakan, dan sintasan. Hasil menunjukkan perlakuan A menghasilkan pertumbuhan terbaik dengan panjang 6,81±0,01 cm, bobot 2,30±0,01 g, serta efisiensi pakan 43,53±6,00%. Dosis pengayaan 0,6 g/L pada Daphnia sp. terbukti mampu meningkatkan performa pertumbuhan benih ikan mas koki ranchu.

Ranchu goldfish Carassius auratus is an ornamental fish species with high economic value; however, its growth during the fry stage tends to be relatively slow. Improving the quality of live feed through nutritional enrichment is considered one potential solution. This study provides recommendations regarding the optimal dosage of Daphnia sp. enrichment using commercial milk, as well as additional insights for ranchu goldfish farmers to enhance fry growth performance. The experiment was conducted using a Completely Randomized Design with three treatments: control (without enrichment), enrichment with commercial milk at a dose of 0.6 g/L (A), and enrichment with commercial milk at a dose of 1.2 g/L (B), each with three replications. The observed parameters included absolute length growth, absolute weight growth, specific growth rate, feed efficiency, and survival rate. The results indicated that treatment A produced the best growth performance, with a length of 6.81±0.01 cm, weight of 2.30±0.01 g, and feed efficiency of 43.53±6.00%. Nutritional enrichment of Daphnia sp. with 0.6 g/L commercial milk was proven effective in improving the growth performance of ranchu goldfish fry.