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Endozoochory largely outweighs epizoochory in migrating passerines

Fruits and seeds are critical food sources for many European passerines during the autumn migration, which in turn contribute to disperse seeds either internally, i.e. after ingestion (endozoochory), or externally, when seeds adhere to the body surface (epizoochory). Despite the recognized importance of birds as seed dispersers, the vast majority of studies focused on endozoochory while the external transport o...

Assessing the role of body mass and sex on apparent adult survival in polygynou...

Adult survival, an important fi tness component, is usually 1) lower in lighter individuals due to their reduced ability to survive winter conditions compared to heavier ones, especially in resident species at northern temperate latitudes and 2) lower in females compared with males due to higher reproductive costs incurred by females. In this paper, a capture – mark – recapture dataset of 649 cetti ’ s warblers...

Seed dispersal networks in an urban novel ecosystem

The conflict resulting from the expansion of human activities into natural habitats affects the structure and functioning of ecosystems. Similarly, the anthropogenic redistribution of many species all over the world affects the composition of biological communities, possibly altering their capacity to sustain key ecological functions, such as seed dispersal. Urban parks are extreme examples of such novel ecosys...

Waterfowl marking in Portugal: main results and future perspectives

The recent integrated monitoring of some Portuguese waterfowl populations has allowed several studies of their ecology, biology and management (Figueiredo 2003, Rodrigues 2001, Rodrigues & Fabião 1997, Rodrigues & Tenreiro 1996, Rodrigues et al. in press). This paper reports and discusses some results related to capture and marking processes used with waterfowl in Portugal. We started the regular capture of wat...

Importância do estuário para os anatídeos e os ralídeos do Baixo Mondego

Este trabalho pretende compilar a informação sobre a real importância do estuário do Mondego para as populações de anatídeos e ralídeos do Baixo Mondego, assim como identificar as ameaças para estas espécies e sugerir medidas de ordenamento e gestão

Será a exploração cinegética de anatídeos e ralídeos uma utilização sustentável...

O facto de mais de 50% das fêmeas de Pato-real concluírem a muda das penas primárias já durante o período venatório sugere que se identifiquem, protejam e ordenem as principais áreas de muda. A protecção destes locais poderá passar pela permissão da caça àquelas aves apenas de Outubro a Dezembro. Também se verificou que cerca de 7% das fêmeas de Pato-real iniciaram a nidificação / postura durante a segunda quin...

Winter sowing and higher populations as dry-farming strategies on sunflower cro...