Electronic Theses and Dissertation

Lemna merupakan tanaman air yang tinggi protein sehingga digunakan sebagai bahan pengayaan pada Daphnia untuk mendukung proses pertumbuhan benih ikan patin (Pangasius sp.). Penelitian ini bertujuan untuk mengetahui pengaruh pemberian Daphnia sp. yang diperkaya cairan fermentasi tepung lemna (Lemna sp.) dengan dosis berbeda terhadap pertumbuhan benih ikan patin (Pangasius sp.). Penelitian ini dilaksanakan pada Agustus – Oktober di Balai Benih Ikan (BBI) Melati II Perbaungan, Kabupaten Serdang Bedagai, Sumatera Utara. Metode penelitian yang digunakan yaitu metode eksperimen menggunakan Rancangan Acak Lengkap (RAL) dengan 5 perlakuan dan 4 kali ulangan. Dosis perlakuan yang diberikan yaitu Perlakuan 1 (Kontrol/daphnia tanpa pengayaan), Perlakuan 2 (Daphnia sp. yang diperkaya cairan tepung lemna 2 ml/L), Perlakuan 3 (Daphnia sp. yang diperkaya cairan tepung lemna 4 ml/L), Perlakuan 4 (Daphnia sp. yang diperkaya cairan tepung lemna 6 ml/L), dan Perlakuan 5 (Daphnia sp. yang diperkaya cairan tepung lemna 8 ml/L). Parameter penelitian yang diamati adalah berat mutlak, panjang mutlak, laju pertumbuhan spesifik, kelangsungan hidup, dan kualitas air. Hasil penelitian menunjukkan bahwa Daphnia sp. yang diperkaya dengan cairan fermentasi tepung lemna berpengaruh nyata (P0,05) terhadap kelangsungan hidup. Hasil terbaik diperoleh pada perlakuan 8 ml/L dengan berat mutlak sebesar 1,74 gram, panjang mutlak sebesar 4,18 cm, laju pertumbuhan spesifik sebesar 1,60%/hari, dan kelangsungan hidup terbaik pada Perlakuan 2 ml/L sebesar 88,50% pada benih ikan patin. Kualitas air pada penelitian ini adalah suhu sebesar 28 – 30 oC, pH sebesar 6,4 – 8,4, dan DO sebesar 4,3 – 6,1 mg/L. Pengayaan Daphnia sp. dengan tepung lemna terfermentasi cukup efektif dalam menunjang pertumbuhan benih ikan patin (Pangasius sp.).

Lemna is an aquatic plant that is high in protein, so it is used as an enrichment material for Daphnia to support the growth process of catfish larvae (Pangasius sp.). This study aims to determine the effect of giving Daphnia sp. enriched with fermented liquid of lemna flour (Lemna sp.) at different doses on the growth of catfish larvae (Pangasius sp.). This research was carried out in August – October at the Melati II Perbaungan Fish Seed Center (BBI), Serdang Bedagai Regency, North Sumatra. The research method used was an experimental method using a Completely Randomized Design (CRD) with 5 treatments and 4 replications. The treatment doses given were Treatment 1 (Control/Daphnia without enrichment), Treatment 2 (Daphnia sp. enriched with 2 ml/L lemna flour liquid), Treatment 3 (Daphnia sp. enriched with 4 ml/L lemna flour liquid), Treatment 4 (Daphnia sp. enriched with 6 ml/L lemna flour liquid), and Treatment 5 (Daphnia sp. enriched with 8 ml/L lemna flour liquid). The research parameters observed were absolute weight, absolute length, specific growth rate, survival, and water quality. The results showed that Daphnia sp. enriched with lemna flour fermentation liquid had a significant effect (P0.05) on survival. The best results were obtained in the 8 ml/L treatment with an absolute weight of 1.74 grams, an absolute length of 4.18 cm, a specific growth rate of 1.60%/day, and the best survival rate in the 2 ml/L treatment was 88. 50% on catfish larvae. The water quality in this study was a temperature of 28 – 30 oC, pH of 6.4 – 8.4, and DO of 4.3 – 6.1 mg/L. Enrichment of Daphnia sp. with fermented lemna flour is quite effective in supporting the growth of catfish larvae (Pangasius sp.).