Dissertations and Theses @ UNI
Availability
Open Access Thesis
Keywords
Drosophila--Behavior--Climatic factors;
Abstract
Rearing conditions, such as temperature and humidity, may change behavior of Drosophila species so they behave differently than wild flies. The duration fruit flies are maintained in the laboratory prior to experimentation may cause genetic changes in the organism, due to selection, inbreeding, and drift. These genetic changes may lead to different responses to a temperature and humidity gradient by long-time laboratory reared stock and stock newly obtained from the wild. Past research revealed that Drosophila robusta and Drosophila tripunctata reared at 20ºC for five years in the laboratory preferred 20.0oC and 19.2oC respectively when they were allowed to move to a desired temperature and humidity during exposure to a temperature and humidity gradient; responses which were very close to the rearing temperature. The same two Drosophila species were used in the present study, using laboratory stock of Drosophila with various durations of laboratory breeding. The various lines included flies from seven year, one year, and three month old lines of laboratory stock, all maintained at 20ºC. Flies of a selected line were exposed to a temperature and humidity gradient and allowed to move to a desired temperature and associated humidity. TO further test the effect of rearing conditions, lines of stock reared in the laboratory for one year and those reared in the laboratory for seven years were acclimated at 26ºC for three days, and the temperature preferences on the temperature and humidity gradient were tested. The duration of the rearing period affected the behavior of flies on the gradient; preferred temperatures were seven year old lines of stock. The seven year old lines of D. robusta stock preferred an average temperature of 20.8ºC, while D. tripunctata from the seven year old lines chose 20.2ºC. The one year old lines of D. robusta stock preferred 19.9ct; while one year old lines of :Q, tripunctata preferred 18.8ºC, responses significantly different from the responses of the seven year old lines of stock. Three month old lines of D. robusta and D. tripunctata chose 20.1ºC and 19.9ºC respectively, behavior also significantly different from the other lines of stock. After the acclimation period, all species within all age groups preferred warmer temperatures on the gradient, further illustrating the importance of rearing conditions on the behavior of these Drosophila species on a temperature and humidity gradient.
Year of Submission
1989
Degree Name
Master of Arts
Department
Department of Biology
First Advisor
Robert Seager
Second Advisor
Virginia Berg
Third Advisor
Paul Whitson
Date Original
1989
Object Description
1 PDF file (61 leaves)
Copyright
©1989 Rene Dutkowski
Language
en
File Format
application/pdf
Recommended Citation
Dutkowski, Rene, "The Product Distribution and Structural Assignment of the Monobromination Products of 7-Hydroxy-2,2,5-Trimethylchroman-4-One" (1989). Dissertations and Theses @ UNI. 2549.
https://scholarworks.uni.edu/etd/2549
Comments
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