Effect of temperature and algal food on egg production and hatching of copepod, Paracalanus parvus.

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 degrees C) 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 degrees C. 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 degrees C and algal concentration was positively supported by ANOVA. The present study concluded that the temperature of 25 degrees C 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.