Population dynamic of endeavour shrimp (metapenaeus elegans) in the Waters of South Coast of Java

Study on the population dynamic of Endeavour Shrimp (M. elegans) was conducted in the South Coast of Java based on data collected during a period of November 2002 to October 2003. The purpose of the study is to identify biological and population parameters of the Endeavour Shrimp. Results show that the size at first maturity of Endeavor Shrimp was 32.6 mm in carapace length. Sex ratio of males and females was 1.0:1.7. The chi square test indicated that comparison of male and female of the Endeavour Shrimp was significantly different. It means that there was imbalance in number between males and females. A number of 554 females were examined, resulting 60% were immature, and 40% were mature. The spawning season of Endeavour Shrimp in South Coast of Java occurs through out the year with two peaks, January (North West monsoon) and August (South East monsoon). The growth parameter of Endeavour Shrimp was 1.5 per year with maximum carapace length (Loo) of 51.5 mm. Instantaneous total mortality (Z) and natural mortality (M) rates were 4.53 and 1.15 per year, respectively. While the respective fishing mortality (F) and exploitation rate (E) were 3.38 and 0.75 per year time respectively to mointain the sustainability of this shrimp fisheries resources. The exploitation rate of endeavour shrimo in south coast of Java was high. This suggests that fishing effort of the endeavour shrimp in that waters should be reduced.