The Bioscan, 3(2): 173-176, 2008
An International Quarterly Journal of Life Sciences
web site: www.thebioscan.in 
STUDIES ON ANOPHELES STEPHENSI VAR MYSORENSIS -EFFECT OF 
TEMPERATURE ON EGG HATCHING 
MITHILESH KUMAR1, SABA QAMAR AND M. RAZIUDDIN
Post Graduate Department of Zoology,Vinoba Bhave University, Hazaribag - 825 301, INDIA
1Department of Zoology, K.O.College,Gumla -
E-mail: mrazi.vbu@gmail.com

KEY WORDS
Anopheles stephensi var. 
mysorensis
Egg
hatching
Temperature
Received on: 11.10.2007 Accepted on: 27.02.2008 *Corresponding Author

ABSTRACT

Eggs of Anopheles stephensi var. mysorensis failed to hatch at temperature ranging from 2.0–6.0ºC and 42ºC. Average hatching is temperature dependent. It showed a gradual decrease with increase in temperature from 10.0 to 38.0ºC. In a mathematical relationship, hatching time (y) decreased logarithmically with temperature(x). 30.0ºC is the optimal temperature for egg hatching. Hatching percentage was lowest (36.6%) at 10.0ºC. With increase in temperature beyond 30.0ºC, hatching percentage decreased. Regression analysis showed a high degree of corelation between hatching time (hrs) and temperature (r = 0.985) and percentage of hatching and temperature (r = 0.980).