| Issue |
E3S Web Conf.
Volume 442, 2023
International Seminar on Fish and Fisheries Sciences (ISFFS 2023)
|
|
|---|---|---|
| Article Number | 01025 | |
| Number of page(s) | 13 | |
| Section | Biodiversity, Fisheries Biology, Fisheries Management, and Conservation | |
| DOI | https://doi.org/10.1051/e3sconf/202344201025 | |
| Published online | 09 November 2023 | |
Reproductive aspects of the Japanese threadfin bream, Nemipterus japonicus (Bloch, 1791) in the Southern Java waters (FMA-RI 573)
1 Aquatic Resources Management, Faculty of Fisheries and Marine Sciences, IPB University, Indonesia
2 Department of Biological Sciences, Visayas State University, Philippines
* Corresponding author: charles_phs@apps.ipb.ac.id
This study describes the reproductive biology of the Japanese threadfin bream, Nemipterus japonicus (Bloch, 1791) captured from the Southern Java Waters (FMA-RI 573). Fish monthly sampling collection was conducted from July to December 2022 at three fish landing ports: PPI Ciwaru, PPN Palabuhanratu, and PPI Binuangeun. Overall, 951 individuals consisting of 469 males (49.32%) and 482 females (50.68%), with a size range of 92-300 mm and a weight range of 10–344 g were collected. The sex ratio is balanced (1:1.10), with fecundity ranging from 10,079 to 82,650 eggs. The length at first maturity is 146 mm for males and 141 mm for females. The Japanese threadfin bream is a total spawner. Spawning occurs throughout the sampling period, with a peak in October-November. The length-based spawning potential ratio (LBSPR) measures the sustainability of fish stocks, indicating that Japanese threadfin bream in southern Java is in an overexploited condition.
© The Authors, published by EDP Sciences, 2023
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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