Population Dynamics and Yield per Recruit of Kawakawa (Euthynnus affinis, Cantor 1849) in the Natuna Sea, Indonesia | ||
| Egyptian Journal of Aquatic Biology and Fisheries | ||
| Volume 29, Issue 5, September and October 2025, Pages 3531-3541 PDF (528.3 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejabf.2025.430101.6729 | ||
| Authors | ||
| Thomas Hidayat1; Meuthia Aula Jabbar* 2; Moh Fauzi1; Heri Widiyastuti1; Siti Mardlijah1; Tegoeh Noegroho1; Pratiwi Lestari1; Asep Priatna1; Helman Nur Yusuf1 | ||
| 1Research Center for Biota System, National Research and Innovation Agency (BRIN) | ||
| 2Jakarta Technical University of Fisheries | ||
| Abstract | ||
| The kawa-kawa (Euthynnus affinis) is a pelagic fish species of significant commercial importance. Research on the population dynamics of E. affinis was undertaken in the Natuna Sea of Pemangkat from January to December 2021. Data were collected in 2021 at Pemangkat Fishing Port, West Kalimantan from drift gillnetters operating in the Natuna Sea. The dataset for fork length was organized and calculated within an Excel workbook, after which it underwent a detailed examination employing ELEFAN I from the FiSAT II. The findings indicated that length-frequency data gathered over a 12-month period exhibited a unimodal distribution, with a modal length class of 46–48 cm. Using the von Bertalanffy formulation, the species showed an asymptotic length (L∞) of 77.7cm and a corresponding annual growth parameter (K) of 0.42 year⁻¹. The study found that the natural mortality rate (M), fishing mortality (F), and total mortality (Z) were 0.80, 0.45, and 1.25 year⁻¹, respectively. The exploitation rate (E) was 0.36. Recruitment reached its zenith in June and July. The yield-per-recruit study revealed that the present exploitation level is below the optimum (E₀.₁ = 0.507), indicating the possibility for sustainable enhancements in fishing effort. The findings suggest that the kawakawa resource in the Natuna Sea is currently underutilized and has potential for further sustainable development. | ||
| Keywords | ||
| Kawakawa; Growth; Recruitment; Mortality; Exploitation; Natuna Sea | ||
|
Statistics Article View: 11 PDF Download: 12 |
||
