Encontrados 60 documentos, a visualizar página 1 de 6
Assessing road effects on bats: the role of landscape, road features, and bat a...
Medinas, Denis; Marques, João Tiago; Mira, AntónioRecent studies suggest that roads can significantly impact bat populations. Though bats are one of the most threatened groups of European vertebrates, studies aiming to quantify bat mortality and determine the main factors driving it remain scarce. Between March 16 and October 31 of 2009, we surveyed road-killed bats daily along a 51-km-long transect that incorporates different types of roads in southern Portug...
Fine-scale population genetic structure and short-range sex-biased dispersal in...
Quaglietta, Lorenzo; Fonseca, Vania; Hájková, Pedtra; Mira, António; Boitani, LuigiThe genetic structure of animal populations is influenced by, among other factors, dispersal and relatedness. Limited dispersal may cause local spatial restrictions in gene flow, which can have important management and conservation implications. We used radiotracking and genetic data to verify the existence of a spatial structure in relatedness within a resident native Eurasian otter (Lutra lutra) population at...
The effect of pair bonding in Cabrera vole’s scent marking
Gomes, Luis; Salgado, Pedro; Barata, Eduardo Nuno; Mira, AntónioThe Cabrera vole (Microtus cabrerae) is a rare rodent living in patchy grassy areas of the Iberian Peninsula where unpaired individuals of both sexes use scent marking primarily to increase their mate-finding likelihood. Cabrera voles establish long-term pair bonds with opposite-sex conspecifics constituting a breeding pair, which is expected to reduce the efforts in searching for a new mate. Under such circums...
Alarm scent-marking during predatory attempts in the Cabrera vole (Microtus cab...
Gomes, Luis; Salgado, Pedro; Barata, Eduardo Nuno; Mira, AntónioThe alarm pheromones often released by animals under stressful situations seem to elicit behavioral changes in conspecifics, which in the appropriate context can be viewed as anti-predatory responses. However, the releasing of alarm pheromones associated with predatory events has not been demonstrated in mammals. In the current study with wild-caught Cabrera voles, we carried out experiments in the laboratory a...
The Role of Scent-marking in Patchy and Highly Fragmented Populations of the Ca...
Gomes, Luis; Mira, António; Barata, Eduardo NunoRodent scent-marking is often used for territorial defense and self-advertisement, and both functions often entail the continuous scent-marking of a large area with high costs. In species with highly-fragmented populations and low density, in which the likelihood of social encounters is low,the costs of continuous scent-marking might exceed the associated fitness benefits; therefore, less intensive scent-markin...
Influence of Land Mosaic Composition and Structure on Patchy Populations: The C...
Pita, Ricardo; Mira, António; Beja, PedroThe ability of patchy populations to persist in human-dominated landscapes is often assessed using focal patch approaches, in which the local occurrence or abundance of a species is related to the properties of individual patches and the surrounding landscape context. However, useful additional insights could probably be gained through broader, mosaic level approaches, whereby whole land mosaics with contrastin...
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...
New data on the distribution range of Hemidactylus turcicus in Portugal
Salguero, Pedro; Medinas, Denis; Silva, Maria do Carmo; Silva, Alexandra; Mira, AntónioEn Portugal, la salamanquesa rosada Hemidactylus turcicus solamente está presente en la costa sur y en zonas interiores del sudeste. En este trabajo se describe la existencia de una nueva población que expande la distribución de esta especie por la costa portuguesa. El hallazgo ocurrió en primavera y verano de 2010 durante los inventarios de fauna realizados en una cantera restaurada en Setúbal. La nueva locali...
Revisión a nivel ibérico de la distribución del topillo de Cabrera o iberón, Ib...
Garrido-Garcia, José; Rosário, Inês; Gisbert, Julio; García-Perea, Rosa; Cordero, Ana Isabel; López-Alabau, Antonio; Mathias, Maria da LuzNeste estudo é apresentado um mapa de quadrículas UTM 10x10 km para toda a área de distribuição de Iberomys cabrerae. A partir dos dados obtidos destacamos que a) as 420 quadrículas com dados se concentram em 4 grandes núcleos disjuntos (Luso-Carpetano, Montibérico, Bético y Prepirenaico), das quais o mais importante é o Luso-Carpetano e o mais pequeno, isolado e ameaçado é o Preirenáico; b) é necessário intens...
Cyberbullying en Centros de Enseñanza Basica y Secundaria del Alentejo
del Barco, B.; Mira, António Ricardo; Verdasca, J; Castaño, E: S.; Carroza, T. GEl dominio y familiaridad de nuestro jóvenes con las nuevas tecnologías (generación interactiva) ha provocado que las formas tradicionales de maltrato entre iguales cambien con el transcurrir del tiempo, apareciendo manifestaciones más específi cas que se sirven de las nuevas tecnologías de la información y de la comunicación para acosar con ensañamiento a la víctima. Esta nueva forma de maltrato se denomina cy...
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