Source: SEAMEO BIOTROP's Research Grant | 2018

Abstract:

This study aims to look at the rate of primary productivity utilization in Jakarta waters by fisheries activities which are divided into two main zones using the Human appropriation of net primary production approach and the primary production recquirement. The fishery zone is divided based on the type of vessel weight size, namely zone I for ships with sizes <5GT and zone II for 5-10GT vessel sizes. The method used in calculating PRRi is to use the approach of Pauly and Chirstensen (1995) while for HANPP we transform the approach of Erb et al. 2009 to the Djau 2013 approach to see the value of HANPP fisheries. From the analysis, it can be seen that the PPR value for zone I is equal to 1,63 x 108 kgC.y-1 while for zone II amounting to 1,44 x 108 kgC.y-1. For HANPP value for zona II is equal 5,12 x 1010 kj and zone I 4,04 x 1010 kj. Total value (zona I dan II) PPRo = 9,88 x1010 , PPRh = 7 x 109 kj, and HANPP total = 9,17 x 1010 kj. Conclusion Harvesting rate of primary productivity by fisheries in Jakarta waters reaches more than 95% of total energy availability it means that the fisheries activities has given considerable pressure to the waters.

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