Encontrados 14 documentos, a visualizar página 1 de 2
Tawny owl vocal activity is constrained by predation risk
Lourenço, Rui; Goytre, Fernando; Delgado, Maria del Mar; Thornton, Michael; Rabaça, João E.; Penteriani, VincenzoThe vocal behaviour of birds may be influenced by many factors, including the risk of being detected by a predator. In Doñana Protected Area, the tawny owl co-exists alongside its intraguild predator, the eagle owl Bubo bubo . We considered four scenarios to study the vocal behaviour of tawny owls at dusk by analysing: A) the calling rate of all males in 29 sites; B) the calling rate at dusk of males living wit...
Relative Effects of Road Risk, Habitat Suitability, and Connectivity on Wildlif...
Santos, Sara; Lourenço, Rui; Mira, António; Beja, PedroBackground: Despite its importance for reducing wildlife-vehicle collisions, there is still incomplete understanding of factors responsible for high road mortality. In particular, few empirical studies examined the idea that spatial variation in roadkills is influenced by a complex interplay between road-related factors, and species-specific habitat quality and landscape connectivity. Methodology/Principal Find...
Major roads have a negative impact on the Tawny Owl Strix aluco and the Little ...
Silva, Clara; Lourenço, Rui; Godinho, Sérgio; Gomes, Edgar; Sabino-Marques, Helena; Medinas, Denis; Neves, Vânia; Silva, Carmo; Rabaça, JoãoThe increasing road networks threaten ecosystems by direct effects such as increased mortality due to collision with vehicles and by various indirect effects leading to road avoidance. We censused Tawny Owls Strix aluco and Little Owls Athene noctua in 2005, 2007 and 2009 in a rural landscape in Southern Portugal in order to study the effects of roads and habitat characteristics on Tawny Owl density and Little...
Major Roads Have a Negative Impact on the Tawny Owl Strix aluco and the Little ...
Silva, Clara C.; Lourenço, Rui; Godinho, Sérgio; Gomes, Edgar; Sabino-Marques, Helena; Medinas, Denis; Neves, Vânia; Silva, Carmo; Rabaça, João E.The increasing road networks threaten ecosystems by direct effects such as increased mortality due to collision with vehicles and by various indirect effects leading to road avoidance. We censused Tawny Owls Strix aluco and Little Owls Athene noctua in 2005, 2007 and 2009 in a rural landscape in Southern Portugal in order to study the effects of roads and habitat characteristics on Tawny Owl density and Little ...
Transparência nas câmaras municipais portuguesas : informação divulgada nos sít...
Lourenço, Rui Pedro; Jorge, Susana; Sá, Patrícia Moura eO objectivo deste trabalho é analisar a informação disponibilizada nos sítios das 100 Câmaras Municipais da Região Centro tendo como referencial os 8 Princípios de Open Government Data (propostos pelo Open Government Working Group) e o Portal dos Contratos Públicos (BASE), associado ao Código dos Contratos Públicos, e desenvolvido para fomentar a transparência na Administração Pública. Focando itens fundamental...
The role of habitat connectivity on road mortality of Tawny owls
Pereira, Miguel; Lourenço, Rui; Mira, AntónioResearch of habitat fragmentation has revealed a large number of constraining effects on species, which represent a central issue for wildlife conservation. In this article we address an approach based on spatial models of tawny owl Strix aluco. The habitat is assessed in relation to species density and hotspots of road casualties. The data was collected in two years surveys, in the montado habitat and casualti...
Kill fore being killed: an experimental approach supports the predator-removal ...
Rabaça, J.E.; Lourenço, Rui; Penteriani, Vincenzo; Delgado, Maria del Mar; Marchi-Bartolozzi, MichelaIntraguild predation (IGP) has been explained in terms of competitor-removal, food-stress and predator removal hypotheses. Only the first two hypotheses have been fairly well studied. To test the predator-removal hypothesis as a force determining IGP in avian predators, we performed a field experiment to simulate the presence of an IG predator (eagle owl Bubo bubo dummy) in the surrounding of the nests of four ...
THE ROLE OF HABITAT CONNECTIVITY ON ROAD MORTALITY OF TAWNY OWLS
Pereira, Miguel; Lourenço, Rui; Mira, AntónioResearch of habitat fragmentation has revealed a large number of constraining effects on species, which represent a central issue for wildlife conservation. In this article we address an approach based on spatial models of tawny owl Strix aluco. The habitat is assessed in relation to species density and hotspots of road casualties. The data was collected in two years surveys, in the monta...
Transparência financeira do sector empresarial local : informação disponibiliza...
Lourenço, Rui Pedro; Jorge, Susana Margarida; Sá, Patrícia Moura e; Rolas, HelenaO objectivo deste trabalho é analisar a informação institucional, previsional e financeira que as entidades do Sector Empresarial Local disponibilizam nos seus sítios web, a visibilidade dessa informação e o formato em que é disponibilizada. Utilizando como ponto de partida o índice de transparência utilizado em trabalhos anteriores de avaliação das Câmaras Municipais (Lourenço et al., 2011), foram definidos 22...
Spatial and temporal ecology of the Lusitanian pine vole ( Microtus lusitanicu...
Santos, Sara; Lourenço, Rui; Mathias, Maria da Luz; Mira, AntónioIn this study we report the fi rst data on the spatial ecology of the Lusitanian pine vole ( Microtus lusitanicus ). Data report to the breeding season and to a traditional Mediterranean agricultural landscape in Central Portugal, using radio-telemetry methods. We documented large home range areas with values of 1042 m 2 for males and 862 m2 for females (MCP method; 95% kernel method with values of 2...
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