Development and Application of Underwater Acoustics for Ecosystem-Based Management: Proposal for Marine Conservation and Rehabilitation
Henry M. Manik, Ph.D

Source: SEAMEO BIOTROP's Research Grant | 2016


This study was aimed to develop and apply underwater acoustic technology for ecosystem-based management of marine and fisheries resources in Tidung and Seribu Islands in Jakarta. The study found that the profile of the sea depth in the two islands ranged from 15.0 m to 35.5 m. Coral reefs in the area were found to be rooted in the muddy ocean floor with a mixture of sand sediment. The number of marine life such as fish and zooplankton was measured by effective use of underwater acoustic technology. The study measured quantification of roughness and hardness to characterize the seabed. The linkage between acoustic backscatter, grain size, density of fish and zooplankton abundance was measured using two frequencies of acoustic instruments (50 and 200 kHz) from a single beam . The results showed a relationship type of seabed as a habitat and biota that inhabit density information.
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