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Egg production and growth inDaphnia carinata king

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Proceedings / Indian Academy of Sciences

Abstract

Under laboratory conditions,Daphnia carinata has five preadult and eight adult instars in a temperature range of 29° C to 31° C. During a mean life-span of 24 days it produces about 142·4 eggs. When the cumulative frequency of eggs are plotted as regression lines, the two tropical speciesDaphnia carinata andCeriodaphnia cornuta show faster rates in egg production than the temperateDaphnia pulex. This may be attributed to differences in temperature. The pattern of growth rate in this tropicalD. carinata and the arcticD. middendorffiana were very similar in being faster while that of the temperateD. pulex was gradual. It is suggested that the limiting effects of tropical and arctic environments on animal populations may be comparable.

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Authors and Affiliations

  1. Department of Biological Sciences, Madurai University, Madurai-2, S., India

    P. Navaneethakrishnan & R. George Michael

Authors
  1. P. Navaneethakrishnan
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  2. R. George Michael
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Communicated by Prof. S. Krishnaswamy,f.a.sc.

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Navaneethakrishnan, P., Michael, R.G. Egg production and growth inDaphnia carinata king. Proc. Indian Acad. Sci. 73, 117–123 (1971). https://doi.org/10.1007/BF03045311

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  • DOI: https://doi.org/10.1007/BF03045311

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