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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...

Absorbed dose and effective dose in food irradiation: measurement and validatio...

Food products are processed by different technologies in order to increase its safety and shelflife. Food irradiation is regulated in European Union by the Directive 1999/2/EC, approved by international organizations of food (FAO – Food and Agriculture Organization) and health (WHO – World Health Organization) and the demand for post-harvest processed food products without use of chemicals could be an opportuni...

Construção e validação do Inquérito Pedagógico da Universidade do Porto (IPUP)

Construção e validação do Inquérito Pedagógico da Universidade do Porto (IPUP)

Lesões músculo-esqueléticas relacionadas com as atividades desportivas em crian...

A prática regular de exercício físico promove a melhoria do estado geral de saúde e é fundamental para a prevenção de um grande número de patologias, entre as quais se encontram as doenças músculo-esqueléticas. A promoção da atividade física e dos seus efeitos benéficos para a saúde têm contribuído para o rápido crescimento do número de crianças e adolescentes envolvidos em atividades desportivas organizadas ou...

Color-spaces and color segmentation for real-time object recognition in robotic...

Object recognition plays an important role in a vast diversity of robotic applications. This paper1 addresses the vantages and disadvantages of using some known color spaces (digital color representations) and segmentation methods for the purpose of accurate detection of color-coded objects, which are objects that are represented by a given color. The robots are previously programmed to associate each color or ...

Can birds enhance the dispersal of freshwater macrocrustaceans?

The freshwater crustaceans, Crangonyx pseudogracilis, Atyaephyra desmaresti and Procambarus clarkii (hereby referred to as FCs) are non-native in several areas of their distribution range presumably due to human-mediated introductions. Here we test dispersal by waterbirds as a complementary mechanism of dispersal of these 3 species. For P. clarkii, we studied the transport of recently hatched juveniles while, f...

A importância do Legado Histórico-Científico da Época Colonial na Formação de Q...

Embora a presença portuguesa em África e no Oriente remonte aos séculos XV e XVI, o esforço de reconhecimento metódico dos recursos naturais destes territórios foi bastante mais tardio. Desenvolveu-se, sobretudo, a partir de finais de novecentos, daí resultando um volume exponencial de estudos até ao advento da independência dos novos países. Decorridas quatro décadas, esta memória científica permanece à dispos...

Tumor-targeted Chlorotoxin-coupled Nanoparticles for Nucleic Acid Delivery to G...

The present work aimed at the development and application of a lipid-based nanocarrier for targeted delivery of nucleic acids to glioblastoma (GBM). For this purpose, chlorotoxin (CTX), a peptide reported to bind selectively to glioma cells while showing no affinity for non-neoplastic cells, was covalently coupled to liposomes encapsulating antisense oligonucleotides (asOs) or small interfering RNAs (siRNAs). T...