| Journal: | Revista brasileira de entomologia |
| Database: | PERIÓDICA |
| System number: | 000303154 |
| ISSN: | 0085-5626 |
| Authors: | Machado, Vilmar1 Araujo, Aldo Mellender de2 |
| Institutions: | 1Universidade do Vale do Rio dos Sinos, Laboratorio de Genetica, Sao Leopoldo, Rio Grande do Sul. Brasil 2Universidade Federal do Rio Grande do Sul, Departamento de Genetica, Porto Alegre, Rio Grande do Sul. Brasil |
| Year: | 2003 |
| Volumen: | 47 |
| Number: | 3 |
| Pages: | 409-413 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Analítico, descriptivo |
| English abstract | Beetles of the species Chauliognathus fallax Germar 1824 are polymorphic for elytron colouration with six morphs distinguished on the basis of black pigmentation on a yellow background. We investigated samples of C. fallax taken in eight consecutive weeks aiming to determine the frequency of the morphs which were grouped, for statistical analysis, into three classes according to elytra pigmentation as well as the possible occurrence of assortative mating. Our results showed a variation in the frequency of the classes throughout the season, both in males and females, with the maximum frequency of each class at the fourth and fifth week. The three classes (A, B, C) showed the same pattern of variation, and class B was always the more frequent. To test randomness of matings two approaches were taken: in the first, we compared the frequency of each class in copulating and non-copulating insects. In the second, the frequency of each class in the whole sample was taken as the probability of occurrence of the respective class; then, using the criterion of the probability of independent events we calculated the expected proportion of copulating insects for each pair of events. Both methods gave non-significant differences, suggesting that the matings were random |
| Disciplines: | Biología |
| Keyword: | Insectos, Reproducción y desarrollo, Elitros, Polimorfismo, Apareamiento selectivo, Chauliognathus fallax, Coleoptera |
| Keyword: | Biology, Insects, Reproduction and development, Elytra, Selective mating, Polymorphism, Chauliognathus fallax, Coleoptera |
| Full text: | Texto completo (Ver HTML) |
