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  • 标题:Population Density of Emerita asiatica (H. Milne Edwards, 1837) in Relation to Oxygen Demand in the Kovalam Beach, East Coast, Kanchipuram District of Tamil Nadu, India
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  • 作者:Jayaprakash Sivakumar ; Balu Nappinai ; Jayapraksh Jayanthi
  • 期刊名称:Journal of Modern Biotechnology
  • 印刷版ISSN:2319-6645
  • 出版年度:2014
  • 卷号:3
  • 期号:3
  • 页码:30-34
  • 出版社:Madras Institute of Biotechnology
  • 摘要:Population density of Emerita asiatica in relation to oxygen demand in the Kovalam beach, East coast, KanchipuramDistrict of Tamil Nadu was studied. Specimens were collected once in a fort night from April 2013 to March 2014 by handpicking method in the intertidal region of Kovalam beach. The Dissolved oxygen, Biological oxygen demand and Chemicaloxygen demand of sea water were recorded once in a fortnight. The population presented a smaller incidence of males inrelation to females (48.66:51.34); however in May 2013 an inverse pattern occurred (73:27). Ovigerous females werepresent in all samples with greater frequencies in October and November 2013 where as the highest juveniles were presentin May and September 2013. The variation noted in population of E. asiatica showed there is a relationship to oxygendemand fluctuations; it can be concluded that oxygen demand fluctuations have influence on the population density of thisspecies in Kovalam beach. Hence, the rather stable oxygen demand throughout the year and moderate changes in sea watermay well be conducive to population density of E. asiatica.
  • 关键词:Emerita asiatica; Dissolved oxygen; Biological oxygen demand; Chemical oxygen demand; population density;and sex-ratio.
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