Life history and length base spawning potential ratio (LBSPR) of malabar snapper Lutjanus malabaricus (Bloch & Schneider, 1801) in western of South Sulawesi, Indonesia

Abstract

Lutjanus malabaricus is an economically important fish species having high market demand especially in Indonesia and the Asian region. Due to over exploitation this species is collapsing. Accordingly, it is important to understand their status. This study was aimed to assess its status according to their life history parameters in Western of South Sulawesi, Indonesia. We recorded length and maturity stage of L. malabaricus from Sumpang Binange (Barru) landing base which landed by bottom-longliners. The data were collected from 2018 to 2019 in as daily sampling. The spawning potential ratio (SPR) was analyzed using LBSPR method and considering the uncertainties. We found that the growth coefficient (K), length asymptotic (L∞) and natural mortality (M) were 0.245 year-1, 73.98 cm of total length and 0.323 respectively. Length at maturity in 50% level (L50) was 41.35 cm and 95% level (L95) was 53.2 cm. Based on these parameters and determining uncertainties resulted the stochastic SPR is mostly met to the threshold of reference point at level 30%. It means that stock status of L.malabaricus is at the optimum level.