Kajian stok beberapa spesies ikan famili leiognathidae di negara Brunei Darussalam
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Date
1994-03
Authors
Subramaniam, Selvanathan
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Abstract
This study is based on a demersal fish resources survey conducted
in Brunei over a period of one year between 1989 and 1990. The survey
area encompassed the waters between the coast and the 100 meter
isobath. Sampling was conducted using a Boris-Goshawk trawl
net operated from the Research Vessel, "LUMBA-LUMBA".length
frequency measurements of Leiognathus splendens, L. bindus
and equulus were taken. The data obtained was analysed
using the computer programme, ELEFAN (Electronic Length Frequency
Analysis) . Parameters studied included Loo, K, M, F, Z, E, ARP
and ¢', where: Leo= asymptotic length, K = growth constant, M =
Natural Mortality Rate, F = Fishing Mortality Rate, Z = Total
Mortality Rate, E = Exploitation Rate, ¢' = Phi prime and ARP =
Annual Recruitment Pattern. In addition, Relative Yields Per
Recruit, Y/R' and Relative Biomass Per Recruit,· B/R', were also
analysed. Exponential Decay Models with variable Z values were
also computed for the three species. Using the swept-area method,
total demersal fish stock biomass was estimated. Potential
Yields were computed using the Gulland formula. The family
Leiognathidae comprises the largest component in the demersal
fish assemblage. The. three Leiognathus species studied are fast
growing species. Exploitation Rates for the three species are
low at present. The demersal fish stock biomass is also underexploited.
There is thus room for expansion of the trawler fleet
which has been identified as the primary exploitation system for
The demersal fish stocks. Over-exploitation can be avoided by
careful monitoring of fish stocks and control of fishing effort.
Description
Keywords
Spesies ikan famili leiognathidae , Negara Brunei Darussalam