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- Title
Population Characteristics of the Japanese Threadfin Bream Nemipterus japonicus (Bloch, 1791) (Actinopterygii: Nemipteridae) at Bintulu Coast, Sarawak, South China Sea.
- Authors
Tonie, Nettely; Idris, Mohd Hanafi; Abdulla-Al-Asif; Rauhan Wan Hussin, Wan Mohd; Mustafa Kamal, Abu Hena
- Abstract
Nemipterus japonicus (Japanese threadfin bream) is one of the most significant fish species throughout the Indo-Pacific regions. No previous studies on the population dynamics of N. japonicus have been carried out in the Eastern Malaysia (Malaysian Borneo). The present study focused on the population dynamics of N. japonicus from April 2013 to March 2014 in the coastal area of Bintulu, South China Sea. Local fishermen provided samples, which were then analysed. The FiSAT II software was used to evaluate the collected length frequency data. The asymptotic length (L∞) and growth coefficient (K) were 26.78 cm and 0.85 yr-1, respectively. The growth performance index (ϕ’), total mortality co-efficient (Z), natural mortality (M) and fishing mortality (F) were 2.785, 2.97, 1.63 and 1.34 per year, respectively. According to the estimates, the exploitation rate (E) for N. japonicus was 0.45, while the E0.1, E0.5 and Emax were determined as 0.72, 0.4 and 0.806, respectively. The obtained value of exploitation was less than Emax, although slightly higher than E0.5. The recruitment characteristics of N. japonicus have been stable throughout the year, with one peak pulse. The results contribute to the knowledge of the dynamics of N. japonicus populations and are important for the sustainable management of the Sarawak fishing resources.
- Subjects
SARAWAK; EAST Malaysia; SEBASTES marinus; ACTINOPTERYGII; POPULATION dynamics; FISH mortality; FISHERY management
- Publication
Acta Zoologica Bulgarica, 2023, Vol 75, Issue 2, p273
- ISSN
0324-0770
- Publication type
Article