Induction of embryonic and larval diapause in Aedes togoi (Theobald) (Diptera:Culicidae)
| dc.contributor.author | Galka, Brian Edward | |
| dc.contributor.examiningcommittee | MacKay, P.A. (Entomology) Dick, T.A. (Entomology) | en_US |
| dc.contributor.supervisor | Brust, R.A. (Entomology) | en_US |
| dc.date.accessioned | 2016-10-03T21:14:42Z | |
| dc.date.available | 2016-10-03T21:14:42Z | |
| dc.date.issued | 1986 | |
| dc.degree.discipline | Entomology | en_US |
| dc.degree.level | Master of Science (M.Sc.) | en_US |
| dc.description.abstract | Aedes togoi (Theobald) from Vancouver, B.C. may enter diapause in either the egg or the larval stage. Larval diapause occurred in the 4th instar, when immatures were maintained at 16°C or less, at photoperiods shorter than 12h light/day. The critical photoperiod was calculated as LD 10.9:13.1 at 16°C. Larvae which did not pupate after 40 days at the experimental conditions were assessed as being in diapause. Non-diapause larvae reached the pupal stage in 17-20 days at 16°C. At 14°C, 100% of the larvae diapaused at LD 10:14. Temperatures of 18°C or higher, at LD 10:14, resulted in no larval diapause. Embryonic diapause resulted when immatures, adults and eggs were maintained at temperatures ranging from 22 to 28°C, at photoperiods shorter than 15h light/day. The critical photoperiod was calculated as LD 15.3:8.7 at 25°C, and LD 14.4:9.6 at 22°C. There was no diapause when the population was maintained at 24°C LD 16:8. An experiment was conducted to determine if a simulated dawn/dusk of 90 minutes/day would increase mating success. After three days at the experimental conditions, there was no difference in mating success between populations of males and females maintained with a dawn/dusk period and those maintained at the same photoperiod where the light/dark change was abrupt. | en_US |
| dc.description.note | 1986 | en_US |
| dc.identifier.uri | http://hdl.handle.net/1993/31868 | |
| dc.language.iso | eng | en_US |
| dc.rights | open access | en_US |
| dc.subject | Diapause | en_US |
| dc.subject | Aedes togoi | en_US |
| dc.subject | Diptera | en_US |
| dc.subject | Culicidae | en_US |
| dc.title | Induction of embryonic and larval diapause in Aedes togoi (Theobald) (Diptera:Culicidae) | en_US |
| dc.type | master thesis | en_US |