| Issue |
BIO Web Conf.
Volume 112, 2024
6th EMBRIO International Symposium: “Ocean for Prosperity: Sustainably Use of the Ocean Resources for Economic Growth, Improvement of Livelihoods, and Preserve its Ocean Ecosystem Health” (EIS 2023)
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|---|---|---|
| Article Number | 01003 | |
| Number of page(s) | 11 | |
| Section | Aquaculture | |
| DOI | https://doi.org/10.1051/bioconf/202411201003 | |
| Published online | 06 June 2024 | |
Outdoor larval rearing of golden rabbitfish (Siganus guttatus): Observation on embryogenesis and early development stage
1 Research Center for Fishery, National Research and Innovation Agency (BRIN), 16911 Bogor, Indonesia
2 University of Dayanu Ikhsanuddin, 93711 Baubau, Southeast Sulawesi, Indonesia
3 Research Institute for Coastal Aquaculture and Fisheries Extension, Ministry of Marine Affairs and Fisheries, Indonesia
* Corresponding author: asda.laining@brin.go.id
The outdoor culture system is an extensive larval rearing system used to produce fingerlings using a large volume of facilities in outdoor conditions. This study was aimed at investigating the embryogenesis and early-stage development of larval golden rabbitfish reared in outdoor concrete tanks. Selected broodstocks were spawned in a tank equipped with a substrate for egg attachment. The larvae were reared in a 64 m3 concrete tank with sand substrate at the bottom, at a density of 5 individuals per liter for 25 days. The larvae were fed with rotifers and commercial powder feed during the experimental rearing. The results showed that female broodstock weighing 712 – 755 g had a fecundity of 413,400 – 585,000 eggs. Embryo development from the 2-cell stage to hatching took 20 hours and 10 minutes. The hatching rate was 44 – 66% at an egg diameter of 450 – 661 µm. D-1 larvae had a total length of 2.4 mm, and mouth opening occurred at late D-2. At the end of the experimental period, larval growth achieved a total length of 21.0 mm.
© The Authors, published by EDP Sciences, 2024
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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