PENDUGAAN BEBERAPA PARAMETER DINAMIKA POPULASI IKAN LAYANG (Decapterus macrosoma, BLEEKER 1841) DI PERAIRAN TELUK BONE, SULAWESI SELATAN
ABSTRACT: This research was
conducted in November to December 2012 which aimed to estimate the population
dynamic of mackerel fish through their age-group, growth, mortality, and yield
per recruitment. Samples were taken from the waters of sub district of Panyula,
in the district of East Tanete Riatang, in Bone Region. Age-group was measured
using Bhattacharya method with the help of Fish Stock Assessment Tools II
(FISAT II) software. Growth and natural mortality were measured by applying the
equations of Von Bertalanffy and Empiris Pauly (respectively). Whereas total
mortality as well as yield per recruitment were estimated by applying Beverton
and Hold equation; and catch mortality was estimated by applying the equation
of Z=F+M. Results showed the average total length of 849 mackarel fish that was
121-295 mm. They were divided into 4 groups with 306.35 mm asymptotic length,
0,33 growth rate coefficient and theoritical age of - 0.0294 year. Natural
mortality rate, total and catch mortality, and exploitation rate were 0.3672 per
year; 2,4358 per year, 2,0687 per year and 0.8493 (respectively). This indicated
that an over catch had occurred due to the higher catch mortality compared to
the natural mortality as well as the yield per recruitment, i.e. 0.0865
gram/recruitment.
Penulis: Suwarni, Joeharnani
Tresnati, Moh. Tauhid Umar, Muhammad Nur, Hikmasari
Kode Jurnal: jpperikanandd150180
