Growth and mortality of grey reef shark Carcharhinus amblyrhynchoides in Makassar Strait, Indonesia

Small-scale fishers generally carry out shark fishing in Indonesia. Trends in shark fishing are growing, both as the primary target and bycatch. This research aimed to determine the growth, mortality and exploitation rates by age group of grey reef sharks (Carcharhinus amblyrhynchoides) caught in the Makassar Strait. The samples were taken from September to June 2020. The results showed an asymptotic length (L∞) of 407 cm, a growth rate coefficient (K) of 0.16 and a theoretical age (t0) - 0.3967. The fishing mortality (F) value was 0.37 year-1 , natural Mortality (M) was 0.26 year-1 , and the total mortality (Z) was 0.63 year-1 . An exploitation rate of 0.59 indicates that the C. amblyrhynchoides has experienced over-exploitation