Temperature, urbanization and body color polymorphism in South Brazilian populations of Drosophila kikkawai (Diptera, Drosophilidae)
| Autor: | Claudia Rohde, Bartira Ercília Pinheiro da Costa, Vera L. S. Valente |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2003 |
| Předmět: |
Ecology
urban populations Polimorfismo cromático fungi color polymorphism temperature Genética de populações Biology biology.organism_classification Drosophila kikkawai Environmental temperature Polymorphism (computer science) Drosophilidae Urbanization lcsh:Zoology Animal Science and Zoology Drosophila lcsh:QL1-991 |
| Zdroj: | Iheringia: Série Zoologia, Vol 93, Iss 4, Pp 381-393 (2003) Iheringia. Série Zoologia, Volume: 93, Issue: 4, Pages: 381-393, Published: 30 DEC 2003 Repositório Institucional da UFRGS Universidade Federal do Rio Grande do Sul (UFRGS) instacron:UFRGS Iheringia. Série Zoologia v.93 n.4 2003 Iheringia. Série Zoologia Fundação Zoobotânica do Rio Grande do Sul (FZB/RS) instacron:FZB/RS |
| ISSN: | 1678-4766 0073-4721 |
| Popis: | Body color polymorphism of urban populations of cosmopolite fly Drosophila kikkawai Burla, 1954 was investigated in relation to its possible association with environmental temperature. Samples of D. kikkawai were collected in spring, summer, autumn and winter between 1987 to 1988, in zones with different levels of urbanization in the southern Brazilian city of Porto Alegre, Rio Grande do Sul. A clear association was observed between darker flies and both seasons with low temperatures and areas of low urbanization (where temperature is generally lower than in urbanized areas). Results of preliminary laboratory experiments involving six generations of flies grown in chambers at temperatures of 17º and 25ºC confirmed this tendency to a relationship between body color and temperature, with allele frequency of the main gene involved in body pigmentation changing over time. |
| Databáze: | OpenAIRE |
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