Accession Number : AD0776087

Title :   Studies on Diapause and Female Fecundity in 'Aedes atropalpus',

Descriptive Note : Doctoral thesis,

Corporate Author : MANITOBA UNIV WINNIPEG DEPT OF ENTOMOLOGY

Personal Author(s) : Kalpage, K. S. P. ; Brust, R. A.

Report Date : 19 MAR 1973

Pagination or Media Count : 8

Abstract : Either high temperature or long photoperiods effectively terminate embryonic diapause in Aedes atropalpus. Diapausing eggs hatch after a 20-day exposure to 30 degrees C, or a 90-day exposure to L:D 16:8. A high percentage of diapausing eggs will hatch even after 5 days at 30 degrees C, provided they are 60-90 days old. High temperature acts independently of photoperiod, and eggs will hatch at short as well as long photoperiods. The critical photoperiod for the induction of diapause for a population of A. atropalpus from 44 degrees N.L. was 14.25 h light/day. High and low levels of protein in the larval diet affected both the size of adults and the fecundity. Exposure of larvae and adults to different photoperiods affected egg production as well. Fecundity was greatest at L:D 16:8, whereas adult size was greatest under continuous light. (Author)

Descriptors :   *REPRODUCTION(PHYSIOLOGY), *EMBRYOLOGY, AEDES, TEMPERATURE, PHOTOPERIODISM, EGGS, LARVAE, CULICIDAE, ENVIRONMENTS, THESES.

Subject Categories : Biology

Distribution Statement : APPROVED FOR PUBLIC RELEASE