Daily Migration and Contribution of Calanoida Zooplankton to Scattering Volume in Banda Sea, Indonesia

The study aims to analyze daily migration of zooplankton in Banda Sea and contribution of Calanoida to scattering volume. Applied method is exloratory description through direct survey toward zooplankton by using Bauna jaya VII vessel as floating platform. The findings show that daily migration of zooplankton in surface layer occurs in every observation period, average value of scattering volume in startified depth of 0-25 meters is -84.19 dB.For stratified depth of 25-50 meters, scattering volume reaches -81.81 dB. At 00:00-03:00, zooplankton is concentrated densely at three water layers by SV value of -84.25, -81.88, and -83.90 dB. Zooplankton aggregation is always almost at surface layer of 0-25 meter at every observation time. Allegedly, oceanographic factor with high concentration value of chlorophyll a are the reason. Concentration value of chlorophyll a in this depth may reach 2.1 mg/m3. Journal of Environment and Ecology, 2014, Volume 5 No 1, 103-116