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All Journal Jurnal Multidisipliner Kapalamada Jurnal Perikanan
Hamdanul Fain
Universitas Pendidikan Ganesha
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OPTIMASI EFISIENSI PAKAN DAN PERTUMBUHAN IKAN KAKAP PUTIH (Lates calcarifer) MELALUI KOMBINASI PAKAN KOMERSIAL DAN IKAN LEMURU PADA SISTEM KERAMBA JARING APUNG Diyo Wahyu Ardiansyah; Gede Ari Yudasmara; Hamdanul Fain
Vol 16 No 3 (2026): JURNAL PERIKANAN
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jp.v16i3.2346

Abstract

High feed costs remain a major constraint in the cultivation of Asian seabass (Lates calcarifer) in floating net cages (FNC), necessitating a more efficient feeding strategy without compromising fish growth performance. This study aims to analyze the effect of a combination of commercial feed and lemuru fish (Sardinella longiceps) on the feed efficiency and growth of Asian seabass, as well as to determine the most optimal feed combination. The research employed an experimental method utilizing a Randomized Block Design (RBD) consisting of three treatments and three replications: Treatment A (100% commercial feed), Treatment B (75% commercial feed + 25% lemuru fish), and Treatment C (50% commercial feed + 50% lemuru fish). The observed parameters included absolute length growth, absolute weight growth, specific growth rate (SGR), feed conversion ratio (FCR), survival rate (SR), and water quality. Data were analyzed using Analysis of Variance (ANOVA) at a 95% confidence level, followed by the Least Significant Difference (LSD) test. The results indicated that the feed combinations significantly affected growth and feed efficiency (p < 0.05). Treatment B yielded the best performance with an absolute length growth of 5.07 cm, an absolute weight growth of 50.5 g, an SGR of 2.225% per day, and the lowest FCR of 1.877 g/g. The fish survival rate ranged from 90% to 93%, while water quality parameters remained within the optimal range throughout the study. Therefore, the combination of 75% commercial feed and 25% lemuru fish is the most effective formulation for improving the feed efficiency and growth of Asian seabass in the floating net cage system.
ANALISIS ISI PERUT IKAN NILA (OREOCHROMIS NILOTICUS) DI KERAMBA JARING APUNG (KJA) DANAU BATUR, BALI Ni Komang Lina Tetri Saraswati; Gede Iwan Setiabudi; Hamdanul Fain
Jurnal Multidisipliner Kapalamada Vol. 5 No. 01 (2026): JURNAL MULTIDISIPLINER KAPALAMADA
Publisher : Pusat Studi Ekonomi, Publikasi Ilmiah dan Pengembangan SDM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62668/kapalamada.v5i01.2286

Abstract

This study aims to identify feed composition and analyze the Frequency of Occurrence (FO) of both natural and artificial feed in the digestive tract of Nile tilapia. The research employed a quantitative descr iptive approach with purposive sampling techniques, in which 40 fish (150–300 g) were collected from four geographical locations (North, South, East, and West). The digestive tract contents were preserved using 4% formalin and identified using a binocular microscope (10×–40× magnification). The results revealed a broad dietary spectrum consisting of 20 taxa, dominated by Bacillariophyceae, Chlorophyceae, Zygnematophyceae, Cyanobacteria, and Zooplankton. Four taxa exhibit ted an absolute FO value of 100%: Nitzschia sp., Chlorella sp., Microcy stis sp., and Brachionus sp., while pellet fragments showed a relatively low FO value of only 10%. The presence of periphytic organisms (Epithe mia sp., Navicula sp.) and benthic mites (Hydrachnidia sp.) indicates active grazing behavior of fish on the floating net cage structures. The consistent presence of Microcystis sp. acts as a bioindicator of eutrophic ation in Danau Batur. Concludes that Nile tilapia cultured in floating net cages still significantly utilize natural feed resources, thereby providing opportunities to improve the efficiency of artificial feeding management.
Co-Authors Diyo Wahyu Ardiansyah Gede Ari Yudasmara Gede Iwan Setiabudi Ni Komang Lina Tetri Saraswati