Effect of Water Circulation on the Distribution of Zooplankton in the Southern Waters of Peninsular Malaysia

Balqis Balqiah Shafie, Liew Juneng, Azman Abdul Rahim
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Abstract

The waters of Peninsular Malaysia located between the South China Sea and the Straits of Malacca are greatly influenced by two different monsoons: the Southwest Monsoon (SW) and the Northeast Monsoon (NE). Zooplankton are known to be receptive to any environmental changes. Apart from biotic and abiotic changes, the movement of water currents also has an impact on the distribution and composition of zooplankton, as this group is considered a passive swimmer that is dependent on the movement of water currents. This study was conducted to determine the effect of water movement in the southern waters of Peninsular Malaysia on the distribution of zooplankton. Sampling was done in three main areas: Kukup, Pengerang, and Pulau Besar. A total of 16 stations with three replicates per station were performed using a plankton net with a mesh size of 140µm. Results show that zooplankton in Pengerang recorded the highest with 256.157 ind/ m3, followed by Kukup (132.412 ind/m3) and Pulau Besar (54.066 ind/m3). There were seven dominant species of copepods recorded in this study, namely Acrocalanus gracilis, Bestiolona similis, Euterpina acutifrons, Oithona nana, Oithona similis, Paracalanus aculeatus, and Paracalanus denudatus. Generally, this study has shown a notable relationship between local current circulation patterns and zooplankton distribution.
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马来西亚半岛南部水域水循环对浮游动物分布的影响
位于南中国海和马六甲海峡之间的马来西亚半岛水域深受两种不同季风的影响:西南季风(SW)和东北季风(NE)。众所周知,浮游动物对任何环境变化都很敏感。除了生物和非生物的变化外,水流的运动也会影响浮游动物的分布和组成,因为浮游动物被认为是依赖于水流运动的被动游泳者。本研究旨在确定马来西亚半岛南部水域的水运动对浮游动物分布的影响。在三个主要地区进行了抽样:古姑、Pengerang和Pulau Besar。采用目数为140µm的浮游生物网,共设16个站点,每个站点重复3次。结果表明,彭杰垄的浮游动物最多,为256.157 ind/m3,其次是库库普(132.412 ind/m3)和贝沙岛(54.066 ind/m3)。本研究记录到的桡足类优势种有7种,分别为:粗顶棘足、长角棘足、长角棘足、大角棘足、长角棘足和白斑棘足。总的来说,本研究显示了当地洋流环流模式与浮游动物分布之间的显著关系。
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