Journal of Environmental Biology

Effect of temperature and algal food on egg production and

hatching of copepod, Paracalanus parvus

P. Santhanam*, N. Jeyaraj and K. Jothiraj

?Department of Marine Science, Bharathidasan University, Tiruchirappalli-620 024, India

*Corresponding Author email : sanplankton@yahoo.co.in

Publication Data

Paper received:

23 September 2011

Revised received:

11 February 2012

Accepted:

26 May 2012

Abstract

There are relatively few reports on the influence of environmental factors on the development and reproduction of calanoid copepods. In this study, we establish over the 12 days culture experiment at different temperature (18, 20, 25, 30 0C) and different algal cell densities 1000, 5000, 10,000, 20,000 cells ml^-1. The results revealed that the high egg production (42.33 eggs female^-1?day^-1) and hatching rate (92.65%) was reported in the temperature of 25 0C. It is understood that the egg production of P.parvus clearly affected by temperature was supported by ANOVA value (F= 4.792909) while the egg production and hatching rate was found to be high as 53.5?4.94 eggs female^-1?day^-1, 96.26% respectively with 20,000 cells ml^-1, The temperature of 25 0C and algal concentration was positively supported by ANOVA . The present study concluded that the temperature of 25 0C and food concentration of 20,000 cells ml^-1?was found to be favorable water temperature and algal food concentration to obtain high fecundity and hatching success in copepod, P. parvus.

Key words

Copepod, Paracalanus parvus, Temperature, Food concentration

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