Browsing by Author "Coderre, Daniel"
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- Biogeographic origin of the common green lacewings (Neuroptera, Chrysopidae) of the Azores archipelago, through morphology analysisPublication . Ventura, Maria A.; Thierry, D.; Lourenço, Paula C.; Coderre, DanielDue to a great dispersal ability and small size, insects are probably among the first island colonisers. Chrysoperla carnea sensu lato was for long considered the sole member of the Chrysopidae family in the Azores (Portugal) since it has been regarded as a complex of sibling species in Europe and North America. Its separation into different morphotypes is based on a set of pre-determined morphological traits. Their analysis leads to appraise Azorean Chrysopidae origin, comparing insular and mainland populations. Two outside “carnea complex” species, namely the Nearctic C. rufilabris and the Neotropical C. externa, were also examined to validate the method. Data analysis resulted in grouping separately the two out-group species as expected, and clearly joins insular and Palaearctic specimens of C. lucasina. Chrysoperla agilis, although known to be present in the Azores through courtship song analysis, is morphologically similar to the two other Palaearctic species, which confirms the continental Palaearctic origin of the common green lacewings in the Azores. Madeira has probably served as a stepping-stone to the Azorean colonisation.
- Capacidade de dispersão de Harmonia axyridis PALLAS (Col., Coccinellidae) após largada inundativa para controlo de afídeos do milho, Rhopalosiphum padi L. e Sitobion avenae (F.) (Hom., Aphididae).Publication . Schanderl, Henrique; Ferran, André; Coderre, Daniel; Soares, António O.; Almeida, José M.; Taveira, JoanaA falta de estudos de dispersão de Coccinelídeos afidífagos, e sobretudo o da utilização de espécies de estratos diferentes daqueles a que estão atribuídos em luta biológica, levou-nos a estudar a capacidade de dispersão de Hamonia axyridis PALLAS numa cultura como a do milho para controlo de Rhopalosiphum padi L. e Sitobion avenae (F.) Verificou-se que a dispersão do predador ao fim de 24 horas era pouco significativa e que se deu em função da presa e da sua forma elitral e não do seu sexo ou estrato vegetal.
- Influence of prey quality on the reproductive capacity of two phenotypes of Harmonia axyridis PALLAS (Coleoptera: Coccinelidae).Publication . Soares, António O.; Coderre, Daniel; Schanderl, HenriqueH. axyridis is a highly polymorphic ladybird beetle with a wide geographical distribution in the palearctic region. Genetic polymorphism seems to be the strategy adopted in order to face different habitats at different times. In this paper we suggest that a genotype that confers a specific elytral pattern may also confer a particular reproductive capacity when fed on single diets of essential preys such as A. fabae or M. persicae. We discuss KOMAI & HOSINO (1951) hypothesis, which predicts that the differences in the relative frequency of elytral pattern phenotypes in relation to the host plants in a same habitat could be related with specific composition of aphid populations. Our results revealed that A. fabae significantly increased reproductive capacity of nigra phenotype without affecting reproductive capacity of aulica phenotype.