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Influence of water quality parameters on zooplankton abundance and biomass in the Merbok estuary Malaysia were investigated. Twenty four hours sampling were conducted at station 1, 3 and 5 from 12 th November (spring tide) to 3 rd December (neap tide) 2011 on weekly interval. Results showed that water quality parameters varied with the following ranges: conductivity (10.00-315.00μS -1 cm), transparency (25.50-154.00 cm), light intensity (53.5-1959.00 lux), TSS (20-70 mg -1 L), BOD (0.25-3.46 mg -1 L) and chl a (0.1-1.46 μg -1 L). The highest zooplankton abundance was found at Station 5 (176×10 3 ) and (230×10 3 ) ind-3m and the lowest was at station 1(5.3×10 3 ) and (3.4 ×10 3 ) ind -3 m during spring and neap tide. Zooplankton biomass varied from 0.04 to 0.096 gm -3 m. Spearman’s rank correlation analysis results showed that there was a correlation among zooplankton abundance and conductivity, transparency, TSS, BOD, and biomass except chl and light intensity. Mann-Whitney U test result showed that water quality parameters, zooplankton abundance and zooplankton biomass were significantly different between spring and neap tides. J. Environ. Sci. & Natural Resources, 9(1): 117-122 2016

Effects of Water Quality Parameters on Abundance and Biomass of Zooplankton in Merbok Estuary Malaysia