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Plankton Distribution and Diversity in Tropical Earthen Fish Ponds

机译：热带土鱼池中浮游生物的分布和多样性

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Our knowledge of the consumption of plankton by fish is still fragmentary. Trophic links between fish and plankton are often loose because plankton is a changing assemblage of pelagic organisms of valuable nutritional value. The objectives of the study were to determine the distribution and diversity of planktons in the fish ponds. Water samples for plankton analysis were collected monthly (January-December), along with water samples used for the determination of physico-chemical parameters in 250 ml bottles in Ponds 1, 2 and 5. The freshwater sample was mixed gently and pipetted into 5 ml plankton chamber containing 2 drops of Lugol’s solution. The Lugol’s solution which served as fixative also enhanced sedimentation of the organisms and was left overnight before analyzing plankton using Zeiss inverted plankton microscope and plankton determination keys. Data was analyzed using Shannon-Weaner diversity index, species richness, means and analysis of varians (ANOVA). The results showed that the highest species richness for dry season phytoplankton value of 27 was recorded in Pond 2, with the highest Shannon-Weaner diversity index value of 0.5401 in pond 5. Merismopaedia elegans with 3,434 in pond 2 was the most abundant phytoplankton species and chlorophyceae the most dominant taxa. The rainy season zooplankton species richness values (5 in pond 2) were higher than that of the dry season (3 in pond 3) with the highest Shannon-Weaner index value of 0.3501 recorded in pond 1. The most abundant zooplankton species Asplanchna species 57 was recorded in pond 2. Significant differences (p < 0.05) was observed for phytoplankton and zooplankton species between the ponds. Physico-chemical parameters had influence on the distribution and diversity of planktons in the fish ponds.
机译：我们对鱼类消耗浮游生物的知识仍然是零碎的。鱼和浮游生物之间的营养联系通常很松散，因为浮游生物是具有重要营养价值的浮游生物的不断变化的集合。该研究的目的是确定鱼塘中浮游生物的分布和多样性。每月（1月至12月）收集用于浮游生物分析的水样品，以及用于测定1号，2号和5号池塘250毫升瓶中理化参数的水样本。将淡水样本轻轻混合并吸取到5毫升中。浮游生物室包含2滴Lugol溶液。用作固定剂的Lugol溶液还增强了生物的沉降，在使用Zeiss倒置浮游生物显微镜和浮游生物测定键分析浮游生物之前，应放置过夜。使用Shannon-Weaner多样性指数，物种丰富度，均值和变异系数分析（ANOVA）分析数据。结果表明，池塘2记录了旱季浮游植物的最高物种丰富度为27，池塘5中的香农-威纳多样性指数最高，为0.5401。线虫2中3,434的秀丽线虫是浮游植物中最丰富的物种。绿藻科是最主要的分类单元。雨季浮游动物的物种丰富度值（池塘2中为5）高于旱季（池塘3的3），池塘1中记录的香农-维纳指数最高，为0.3501。浮游动物物种最丰富的浮游动物物种为57记录在池塘2中。池塘之间的浮游植物和浮游动物种类之间存在显着差异（p <0.05）。理化参数影响鱼塘中浮游生物的分布和多样性。

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