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

Domey Moniharapon, Indra Jaya, Henry Manik, Sri Pujiyati, Totok Hestirianoto, Augy Syaihailatua

Abstract


The study aims to analyze daily migration of zooplankton in Banda Sea and contribution of Calanoida to scattering volume. Applied method is exploratory description through direct survey toward zooplankton by using Baruna 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 stratified depth of 0-25 meter is -84.19 dB. For stratified depth of 25-50 meter, 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, -83.9 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. Calanoid contributes to value of scattering volume by regression formulation of Y=-8.93+0.01 Calanoida -0.001 Cyclopoida.


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DOI: http://dx.doi.org/10.5296/jee.v5i1.5879


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