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Omni-Akuatika
ISSN : 18583873     EISSN : 24769347     DOI : -
OmniAquatika is a scholarly refereed research journal which aims to promote the theory and practice, innovation, engineering and management as well as social-economic relevant in fisheries and marine sciences fields. The main aspects of research areas include, but are not exclusive to the current research on cells, organisms, populations, ecosystems, or processes that affect aquatic systems in the field of fisheries and marine science. The journal also welcome other aquatic relevant aspect related to the transport, fate, control of nutrients and abatement of pollutants in the aquatic environment as well as the ecosystem rehabilitation. The authors and readers are students, scientists, and regulatory experts from the academic, industrial, and government sectors worldwide. Master thesis and part of dissertation research work might becoming the potential contributors. High-quality, research articles make up the primary content. Other contributions are short communications, reviews, and special issues. Before contributions are accepted for publication, they must pass a peer-review process managed by the editor-in-chief.
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Articles 291 Documents
The Effect of Ketapang Leaf Extract (Terminalia catappa) For Soaking Gouramy Fish Eggs (Osphronemus gouramy) on Hatching Rate and Survival Rate Mukhtar, Wildan Rasyid; Hastuti, Sri; Nurhayati, Dewi
Journal Omni-Akuatika Vol 21, No 2 (2025): Omni-Akuatika November (Inpress)
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.oa.2025.21.2.1133

Abstract

The problem that often occurs in the process of hatching gourami fish eggs is the low egg hatching rate due to fungal attacks. One way to overcome this is by soaking eggs with ketapang leaf extract as an ingredient that has an antifungal effect. This research aims to determine the effect of soaking gouramy eggs (Osphronemus gouramy) in ketapang leaf extract at different doses on the hatching rate. The research was conducted using a completely randomized design (CRD) with 4 treatments and 3 replications. Treatment A uses 0 g/L ketapang leaf extract, treatment B 1 g/L, treatment C 2 g/L, treatment D 3 g/L. The parameters observed in this study were: egg hatchability, larval survival, prevalence of fungi in eggs and water quality parameters of egg hatching and larval rearing media (temperature and pH). The results showed that soaking eggs with ketapang leaf extract had a significant effect (P<0.05) on egg hatchability, fungal prevalence and survival rate. The highest hatching rate value was on treatment C at 88.33±2.08%, followed by treatment D at 84.67±4.51%, treatment B at 78.67±5.13%, and treatment A at 73.67±3.51%. The lowest prevalence value of the fungus that attacks the eggs was in treatments C and D is 10.00±3.51% and 10.67±3.61%, followed by treatment B at 15.00±1.00%, and treatment A at 24.67±4.73%. The highest larval survival value was in treatment C with 81.20±0.74%, followed by treatment D at 79.13±1.93%, treatment B at 75.26±5.81%, treatment A 66.97±3.00%. Water quality for temperatures ranges from 23-28 oC and pH ranges from 6.7-7.5.