Abstract
The study was carried out in the neritic and estuarine waters of Porto Novo, Coromandel Coast, Bay of Bengal, India during the period January, 1960 to December, 1967. The average displacement volume of plankton usually varied between 2 and 4 c2/m2. During summer, with a season of high plankton productivity, the average plankton displacement volume rose to 8 c2/m3. Generally speaking, the average zooplankton density (standing crop) was usually between 80,000 and 100,000 organisms/m3, of which copepods alone comprised usually between 70,000 and 90,000 organisms/m3. The average copepod density per sample varied from 30,000 to 50,000 organisms/m3. However, in the summer months, the copepod density was usually not less than 100,000 organisms/m3; in some years this was even higher (from 125,000 to 170,000 organisms/m3). Copepods comprised between 80 and 95% of the zooplankton population. The maximum non-copepod population in the zooplankton seldom reached 30%, was ofter below 25%, and usually less than 20%. During the period March to October (in some years as early as February, and in some years up to November), either an increasing or a steady trend of plankton production was evident. It would appear that salinity and rainfall determine the occurrence and distribution of plankton in Porto Novo.
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Communicated by N. K. Panikkar, Panaji
Contribution No. 189 from the Centre of Advanced Study in Marine Biology, Marine Biological Station of Annamalai University, Porto Novo, Tamilnadu, India.
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Subbaraju, R.C., Krishnamurthy, K. Ecological aspects of plankton production. Mar. Biol. 14, 25–31 (1972). https://doi.org/10.1007/BF00365777
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DOI: https://doi.org/10.1007/BF00365777