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All Journal Journal of Vocational in Aquaculture (JAVA)
Cecilia Eny Indriastuti
Study Program of Technology and Management of Applied Aquaculture, College of Vocational Studies, IPB University
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology

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Effect of Overlapping Feeding on the Growth and Survival of Nilem (Osteochilus vittatus) Larvae Risma Arafah Tunisa; Wiyoto Wiyoto; Cecilia Eny Indriastuti; Dian Eka Ramadhani; Riva Hafidah; Andri Iskandar; Robin Robin; Ikhsan Khasani
Journal of Vocational in Aquaculture (JAVA) Vol 2 No 1 (2025): NOVEMBER 2025
Publisher : College of Vocational Studies, Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/gr7ntc26

Abstract

The nilem (Osteochilus vittatus) is an endemic freshwater species native to Indonesia and is valued both for its therapeutic properties and its potential for processing into value-added products such as baby fish chips. However, its relatively low growth rate remains a major constraint in aquaculture development. The effect of overlapping feeding on the growth performance and survival of nilem larvae was evaluated. Spawning was conducted over three periods using hormone-induced broodstock prior to larval rearing, and fertilized eggs were incubated under controlled conditions. Larval rearing was carried out at the Freshwater Fish Germplasm Research Installation using two feeding treatments with two replicates: a non-overlapping feeding regime, in which Infusoria was administered from day 4 to 7 followed by artificial feed, and an overlapping regime, in which Infusoria was provided from day 3 to 10 alongside artificial feed from day 8 to 10 before transfer to outdoor concrete tanks. Higher absolute weight gain (0.022 ± 0.001 g), absolute length gain (0.78 ± 0.03 cm), specific growth rate (3.30 ± 0.135%), and survival rate (90.0 ± 0.89%) were recorded under overlapping feeding compared to the non-overlapping treatment (0.018 ± 0.001 g; 0.67 ± 0.01 cm; 2.76 ± 0.111%; and 86.1 ± 0.62%, respectively). Significant differences (p<0.05) were observed in absolute length gain and survival, while absolute weight gain and specific growth rate were not significantly affected. Overlapping feeding was demonstrated to improve larval performance and can be recommended as a feeding strategy to enhance hatchery productivity in nilem aquaculture.
Effects of Substrate Variation on the Reproductive Effectiveness of Corydoras julii Habiibii Tarish Zufar; Cecilia Eny Indriastuti; Andri Iskandar; Riva Hafidah
Journal of Vocational in Aquaculture (JAVA) Vol 2 No 1 (2025): NOVEMBER 2025
Publisher : College of Vocational Studies, Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/nsm29830

Abstract

Corydoras julii is a freshwater ornamental fish species highly favored by both local and international markets. However, breeders often face challenges in achieving optimal egg production, which is suspected to be influenced by the type of spawning substrate used. This study aimed to determine the most effective substrate for improving the spawning performance of C. julii. The experiment was conducted using a Completely Randomized Design (CRD) with four treatments and three replications, consisting of no substrate (control, K), raffia string (T), PVC pipe (P), and Hydrilla verticillata (H). Parameters observed included egg productivity, fertilization rate, hatching rate, and larval survival rate. The results showed that the highest egg productivity was obtained in the PVC pipe treatment, with an average of 2081 ± 125.83 eggs. However, differences in substrate type did not significantly affect the fertilization rate, hatching rate, or survival rate. Water quality parameters, including temperature, pH, and dissolved oxygen, remained within the optimal range for spawning throughout the study. In conclusion, the PVC pipe was identified as the most effective substrate for enhancing egg productivity in Corydoras julii breeding without negatively affecting other reproductive parameters.
Co-Authors Andri Iskandar Dian Eka Ramadhani Habiibii Tarish Zufar Ikhsan Khasani Risma Arafah Tunisa Riva Hafidah Robin Robin Wiyoto Wiyoto