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STUDY OF ABUNDANCE, BIOLOGY INDEX AND PRIMARY PRODUCTIVITY PLANKTON IN TERRITORIAL WATER IN ESTUARY RIVER OF TAKKALASI, BARRU REGENCY

Erfan A. Hendrajat and Brata Pantjara
Research Institute for Coastal Aquaculture, South Sulawesi Indonesia, 90511
Agency for Marine and Fisheries Research and Development

Plankton are aquatic microorganisms as a source of natural food for fish and shrimp, also can be used as an indicator of stability and fertility waters.This study aims to determine the abundance index of plankton biology and primary productivity in territorial water in estuary  river of Takkalasi, Barru Regency in order to support aquaculture activities in these locations.

Research conducted in  March 2015.  Sampling plankton, chlorophyll and water samples were carried out at six stations.  Plankton taken by filtering the water using a plankton net size of 25 μm by 100 L to 30 ml, then inserted into the bottle plankton and preserved with Lugol 1%. Furthermore plankton identified in the Laboratory of Plankton Research Institute for Coastal Aquaculture, Maros.  Measurements of chlorophyll-a follow spectrophotometric method (Parsons et al. 1984).  To determine the stability of the water, then performed a quantitative analysis of plankton biology index calculation includes diversity, uniformity and domination of the Shannon-Wiener (Odum, 1971; Basmi, 2000)

The identification results plankton found as many as 18 genera, consisting of as many as 12 genera of phytoplankton are 9 genera of the class Bacillariophyceae, 1 genera of class Dinophyceae, 1 genera of class Cyanophyceae and 1 genera of Choromonodonta class. Zooplankton are found as many as 6 genera comprising 4 genera of the class Crustaceans, 1 genera of class Rotatoria and 1 genera of class Ciliate. Plankton abundance ranges from 30-753 ind./L with phytoplankton genera were mostly are of the class Bacillariophyceae. Based on the value of diversity index (H ') with a value greater than 1 is found only in the station 6 (1,373) so that the general conditions of plankton community in estuary river Takkalasi classified in an unstable state. Uniformity index (E) on all stations worth E <1, which shows that the spread of biota between genus is low or the diversity of individuals of each species are very different (structural uniformity between spsies low), there are three stations dominance index (D) value approaching 0 which means there is no species in the extreme dominate other species and there are 3 stations that the index value dominance close to 1, which means in the community structure of the biota is observed there is a genus in the extreme dominate other genus. For fiotplankton primary productivity, is still considered normal (good) with chlorophyll-a concentration range of 1.29 to 3.71 mg/m3.



Table 1. Abundance, diversity index (H'), uniformity index (E) and dominance index (D) plankton in territorial water in estuary river of Takkalasi, Barru Regency
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