A5084094400- Avian ecology and behavior
- Species Distribution and Climate Change
- Animal Behavior and Reproduction
- Wildlife Ecology and Conservation
- Isotope Analysis in Ecology
- Ecology and Vegetation Dynamics Studies
- Marine and fisheries research
- Fish Biology and Ecology Studies
- Economic Theory and Policy
- Plant and animal studies
- Pacific and Southeast Asian Studies
- Social and Economic Solidarity
- Bird parasitology and diseases
- Geography and Environmental Studies
- Animal Nutrition and Physiology
- Genetic and phenotypic traits in livestock
- Insect Pheromone Research and Control
- Agriculture and Rural Development Research
- HIV/AIDS oral health manifestations
- Brazilian Legal Issues
- Amphibian and Reptile Biology
- Urban Development and Societal Issues
- Marine animal studies overview
- Linguistics and Education Research
- Wildlife Conservation and Criminology Analyses
University of Iceland
2015-2024
University of Aveiro
2015-2023
Centro de Estudos Ambientais e Marinhos
2020
Banc d'Arguin National Park
2016
Universidade do Porto
2016
Centro Interuniversitário de História das Ciências e da Tecnologia
2015
University of Lisbon
2015
Summary Food webs and trophic dynamics of coastal systems have been the focus intense research throughout world, as they prove to be critical in understanding ecosystem processes functions. However, very few studies undertaken a quantitative comparison entire food from key consumer perspective across broad geographical area, limiting relevant comparisons among with distinct biotic abiotic components. We investigate structure functioning four tidal ecosystems international importance for...
Introdução: Considerando que o sarampo é uma doença infecciosa grave, causada por um vírus, pode levar à morte, pode-se dizer a maneira mais efetiva de evitar meio da vacinação buscando identificar aumento do número vacinados. Contudo, em 2024 Brasil realizou Monitoramento das Estratégias Vacinação. Objetivo: este trabalho descreve cobertura vacina tríplice viral no 1ª centro regional saúde estado Pará, período 2019 2024. Metodologia: Para tanto, esse estudo trata-se análise quantitativa,...
Migration is fundamental in the life of many birds and entails significant energetic time investments. Given importance arrival breeding area relatively short period available to reproduce (particularly at high latitudes), it expected that reduce spring migration duration a greater extent than autumn migration, assuming pressure arrive into wintering might be relaxed. This has previously been shown for several avian groups, but recent evidence from four tracked Icelandic whimbrels Numenius...
Ground‐nesting species are vulnerable to a wide range of predators and often experience very high levels nest predation. Strategies reduce vulnerability can include concealing nests in vegetation and/or nesting locations which eggs camouflaged less easy for locate. These strategies could have important implications the distribution ground‐nesting success rates areas with differing structure. However, factors influencing concealment camouflage complex. Here we explore effects local structure...
Understanding how individual tradeoffs and carry‐over effects along the annual cycle influence fitness is fundamental to unravel population dynamics, but such data particularly challenging collect in long‐distance migrants. Here, with a full perspective of Icelandic whimbrels Numenius phaeopus islandicus , we investigate across entire distribution, assessing migration costs wintering energetic balance experienced throughout range (from temperate tropical regions), link these breeding...
The timing of annual events is key for organisms that exploit seasonal resources,as deviations from optimal might result in considerable fitness costs. Under strong time selection,individuals likely have fewer suitable strategies available than when selection more relaxed,hence both consistency and flexibility be advantageous depending on the life history or cycle stage. For migrants using arctic tropics during their cycle,the faster warming at higher latitudes elsewhere range may lead to...
AbstractMatching the timing of annual cycle events with required resources can have crucial consequences for individual fitness. But as is composed sequential events, a delay at any point may be carried over to subsequent stage (or more, in domino effect) and negatively influence performance. To investigate how migratory animals navigate their schedule where when it adjusted, we used full data on 38 Icelandic whimbrels (Numenius phaeopus islandicus) tracked 7 years-a subspecies that...
Populations of many vulture species have undergone substantial declines. In Africa, 82% are threatened and although research on vultures has increased, the biology ecology several is still poorly known. The Palm-nut Vulture Gypohierax angolensis peculiar ecological characteristics, feeding palm fruits, associated with aquatic environment taking a wide variety prey. It been over 40 years since last thorough study was undertaken. This investigated behavioural aspects Vultures, using...
For many migratory species, migration can represent a significant part of the annual cycle and strategies used to move between breeding non-breeding areas vary considerably. Weather conditions are important during migration, particularly wind temperature, play crucial role in timing events birds. When specific is important, for example spring arrival laying dates, effects weather on previous might lead fitness consequences, as it may alter speed. During spring, Icelandic whimbrels Numenius...
African vulture populations are rapidly declining, yet funding and other resources available for their conservation limited. Improving our understanding of which species could best serve as an umbrella the entire suite vultures help conservationists save time, money, by focusing efforts on a single species. Furthermore, improving suitability biomonitors detecting environmental toxins authorities to detect changes in ecosystem health. We used systematic approach based criteria selected priori...
To determine the species diversity of cichlids in Banc d'Arguin National Park ( PNBA ) and their phylogenetic relationships with other West Africa, a morphometric meristic molecular study was conducted. Both approaches not only confirm presence Sarotherodon melanotheron but also demonstrate second from genus Coptodon . While characteristics match description Guinean tilapia guineensis , reconstructions based on three mitochondrial one nuclear DNA fragment that C. is paraphyletic over its...
Marine fish stocks are increasingly being exploited to unsustainable levels. Yet, knowledge of basic biological and ecological traits species, required sustain fisheries management at a local scale, remains scarce. We investigated the reproductive biology growth two marine catfishes: rough-head sea catfish (Arius latiscutatus) Guinean (Carlarius parkii). Both species showed one spawning season between May June. Nevertheless, as these mouth brooding we have considered that reproduction may be...
Understanding the consequences of changing environmental conditions on demographic parameters migratory species is key for addressing widely reported declines many these species. We explore variation in reproductive investment and output Purple Herons ( Ardea purpurea) two breeding seasons, with very different precipitation levels but similar temperatures. Despite egg volume, drier year was less than half wetter (∼1.9 vs ∼4.1 chicks per pair) due to weather mediated higher predation. The...
Migratory behaviour in young individuals is probably developed by using a complex suite of resources, from molecular information to social learning. Comparing the migration adults and juveniles provides insights into possible contribution those developmental factors ontogeny migration. We show that, like adults, juvenile Icelandic Whimbrel Numenius phaeopus islandicus fly non‐stop West Africa, but on average depart later, follow less straight paths stop more after reaching land, resulting...