Changes in Brazilian Drosophilidae (Diptera) assemblages across an urbanisation gradient

Changes in Brazilian Drosophilidae (Diptera) assemblages across an urbanisation gradient.

The present study aims to characterise the assemblages of Drosophilidae sampled from four sites subject to different levels of urbanisation, in the city of Florianópolis, South Brazil. Five samples were collected between August 2000 and August 2001 and five between August 2002 and August 2003 in each site. A gradual change in the dominant species was observed in the urbanisation gradient, with ...

Changes in carabid beetle assemblages across an urban-rural gradient in Japan

As part of the international Globenet project, carabid beetles (Coleoptera, Carabidae) were collected using pitfall traps from four urban, four suburban and four rural sites in Hiroshima City, Japan, during the 2001 summer season. In agreement with expectation, carabid abundance and species richness decreased significantly from rural to urban sites. Furthermore, no large, and only few individua...

Malathion Resistance in Drosophila melanogaster (Diptera: Drosophilidae)

Malathion resistance developed in a Drosophila melanogaster population that has been exposed to malathion for almost 20 years. Genetic analyses showed that malathion resistance in this population is under control of several genes that are located on the first, second and third chromosome. The second chromosome contributes the most to resistance; the factor(s) involved may be (partly) dominant o...

Low courtship song variation in south and southeastern Brazilian populations of Drosophila meridionalis (Diptera, Drosophilidae).

Drosophila meridionalis is a cactus-breeding species with a wide distribution in South America. Most populations of this species are geographically isolated, what provides a promising scenario for studying evolution. Former studies of this species revealed a remarkable karyotypic variation among its populations. Up to six distinct metaphase chromosomes were described, showing that this species ...

Directional changes in plant assemblages along an altitudinal gradient in northeast Brazil.