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The effect of daylength and temperature on the induction and termination of diapause in Aedes atropalpus (Coquillett), and field and laboratory studies of autogeny and hibernation in some mosquitoes from Manitoba

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dc.contributor.author Kalpage, Kingsley Samuel Perera en_US
dc.date.accessioned 2012-05-10T21:14:28Z
dc.date.available 2012-05-10T21:14:28Z
dc.date.issued 1970 en_US
dc.identifier ocm72780584 en_US
dc.identifier.uri http://hdl.handle.net/1993/5622
dc.description.abstract Embryonic diapause, which is determined by day-length, has been demonstrated in a multi-voltine mosquito, Aedes atropalpus (Coquillett). Experiments conducted under controlled temperature and photoperiod show that short-days, 8 hours to 14 hours light per 24 hour day, induce diapause in the autogenous Belleville strain of A. atropalpus. The effect of long photoperiods is shown to be independent of low temperatures therefore indicating that in nature the deposition of diapausing eggs in autumn is due to the influence of the shorter days experienced by the mosquitoes. Experiments also show that the sensitive stages for light reception are the fourth larval instar, pupa and adult. Two strains of A. atropalpus were studied, one being the autogenous strain from Belleville, Ontario (44*N latitude) and the other being the anautogenous strain form Austin, Texas (30*N latitude)... The effects of photoperiod and diet on fecundity in autogenous A.atropalpus are discussed... The effect of photoperiod and temperature on the biting activity and ovarian development of anautogenous Culiseta inornata (Williston) showed that this species exhibits the phenomenon of "gonotrophic concordancy". Studies on the autogenous ovarian development in Aedes species at Churchill, Manitoba (58oN) showed that four species, A. communis (Degeer), A. nigripes (Zett.) A. impiger (Walker) and a. campestris (Dyar and Knab) are autogenous. en_US
dc.format.extent xiii, 193 leaves : en_US
dc.language en en_US
dc.rights en_US
dc.rights info:eu-repo/semantics/openAccess
dc.title The effect of daylength and temperature on the induction and termination of diapause in Aedes atropalpus (Coquillett), and field and laboratory studies of autogeny and hibernation in some mosquitoes from Manitoba en_US
dc.type info:eu-repo/semantics/doctoralThesis
dc.degree.discipline Entomology en_US


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