Title : Sustainable management and some biological aspect of banana prawn (Penaeus merguiensis) in Aru island and surrounding waters
The exploitation level of banana prawn (Penaeus merguiensis) resources in Aru Island and surrounding waters has been done very intensive for a long time and until now. To preserve the banana prawn resources, it needs management options to sustain the use of these resources. This study aimed to identify the stock status and management of banana prawns in Aru Island and surrounding waters. The research was conducted from 2013 to 2017 using survey methods and supplemented by the synthesis of investigation results from Aru Island waters. Results show that the prawn’s size structure ranged between 12-58 mm, the sex ratio was dominated by females and the growth pattern was negative allometric. Most of the prawns were caught in immature conditions. The growth rate (K) was 1.0/year with a maximum carapace length (L∞) of 58.1 mm. Total mortality (Z) and natural mortality (M) was 5.43/year and 1.51/year respectively. The fishing mortality (F) was at 3.92/year and exploitation level (E) was around 0.72/year, while the spawning potential ratio (SPR) was 8%. Hence the banana prawn stock in Aru Island and surrounding waters is in overfishing condition. Management options are proposed to keep the sustainability of the resources, such as closed area/season in April, reducing the effort to 44% from current condition, and legal-size catch limitation at 29.8 mm carapace length.