Pedro Araújo

Pedro Araújo
CIBIO Research Center in Biodiversity and Genetic Resources | CIBIO · Center in Biodiversity and Genetic Resources

PhD

About

58
Publications
20,499
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721
Citations
Citations since 2017
21 Research Items
623 Citations
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2017201820192020202120222023020406080100120140
2017201820192020202120222023020406080100120140
2017201820192020202120222023020406080100120140
Introduction
I am a deeply motivated scientist committed in pursuing an academic career, studying population dynamics of migratory species and its influence on the conservation of compositional, structural and functional biodiversity. My model is birds and I realized early on that studying migration requires good international links, as species span over large geographical distribution ranges, as well as, access to novel technologies that allow tracking movement and combining it with physiological ecology.

Publications

Publications (58)
Article
The migrant black-tailed godwit (Limosa limosa) traditionally used natural wetlands in the Iberian Peninsula preparing for migratory flights by feeding mainly in estuaries. In recent decades this species has become increasingly dependent on rice fields, thereby relying on a plant-based diet for fueling. Dietary fatty acids (FA) seem to be determina...
Article
Full-text available
Significance The yellow, orange, and red colors of birds are produced through the deposition of carotenoid pigments into feathers and skin, and often function as signals in aggressive interactions and mate choice. These colors are hypothesized to communicate information about individual quality because their expression is linked to vital cellular p...
Article
Full-text available
The overall speed of bird migration is limited by the amount of fuel stores acquired during the initial phases of migration. The ability to mobilize fat is crucial for migratory birds that can exhibit different migratory strategies. Birds mobilize triglycerides during nocturnal flight thus increasing circulating fatty acids and glycerol to meet the...
Article
Full-text available
Foraging spatial segregation is frequent in central-place foragers during the breeding season, but very few studies have investigated foraging spatial segregation between adjacent sub-colonies. Here, we assessed for within-colony differences in the at-sea distribution, habitat use, trophic ecology and chick growth data of two Calonectris colonies d...
Article
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Exposure to environmental stressors, an increasingly recurring event in natural communities due to anthropogenic-induced environmental change, profoundly impacts disease emergence and spread. One mechanism through which this occurs is through stress-induced immunosuppression increasing disease susceptibility, prevalence, intensity and reactivation...
Article
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In the oligotrophic tropical marine environment resources are usually more patchily distributed and less abundant to top predators. Thus, spatial and trophic competition can emerge, especially between related seabird species belonging to the same ecological guild. Here we studied the foraging ecology of two sympatric species–brown booby (BRBO) Sula...
Article
Full-text available
Birds exhibit striking variation in eye color that arises from interactions between specialized pigment cells named chromatophores. The types of chromatophores present in the avian iris are lacking from the integument of birds or mammals, but are remarkably similar to those found in the skin of ectothermic vertebrates. To investigate molecular mech...
Article
Pelagic seabirds exhibit plasticity in foraging characteristics in relation to oceanographic conditions. This should be particularly relevant in tropical marine environments where food resources are naturally more unpredictable. We studied how inter-annual variations (2013-2018) in tropical oceanographic conditions (driver of oceanic productivity)...
Article
Canaries changing colors Many animals are sexually dimorphic, with different phenotypes in males and females. To identify the genetic basis of sexual differences in bird coloration, Gazda et al. investigated red coloration in mosaic canaries and related species (see the Perspective by Chen). Using a combination of genetic crosses, genomic mapping,...
Article
Full-text available
Wild birds are frequently exposed to the zoonotic tick-borne bacteria Borrelia burgdorferi sensu lato (s.l.), and some bird species act as reservoirs for some Borrelia genospecies. Studying the tropism of Borrelia in the host, how it is sequestered in different organs, and whether it is maintained in circulation and/or in the host’s skin is importa...
Article
Capsule: A combination of several biometric measures enables the reliable sexing of the European Bee-eater Merops apiaster, a species with subtle sex differences in plumage and morphometry. Aims: To explore variation in biometrics and their suitability to discriminate sex in adult European Bee-eaters Merops apiaster. Methods: We sampled populations...
Article
Full-text available
Birds are hosts for several zoonotic pathogens. Because of their high mobility, especially of long‐distance migrants, birds can disperse these pathogens, affecting their distribution and phylogeography. We focused on Borrelia burgdorferi sensu lato, which includes the causative agents of Lyme borreliosis, as an example for tick‐borne pathogens, to...
Article
Unlike wild and domestic canaries (Serinus canaria), or any of the three dozen species of finches in genus Serinus, the domestic urucum breed of canaries exhibits bright red bills and legs. This novel trait offers a unique opportunity to understand the mechanisms of bare-part coloration in birds. To identify the mutation producing the colorful phen...
Preprint
Full-text available
A BSTRACT Unlike wild and domestic canaries ( Serinus canaria ), or any of the three dozen species of finches in genus Serinus , the domestic urucum breed of canaries exhibits bright red bills and legs. This novel bare-part coloration offers a unique opportunity to understand how leg and bill coloration evolve in birds. To identify the causative lo...
Article
Full-text available
Mechanisms underlying fat accumulation for long-distance migration are not fully understood. This is especially relevant in the context of global change, as many migrants are dealing with changes in natural habitats and associated food sources and energy stores. The continental Black-tailed godwit Limosa limosa limosa is a long-distance migratory b...
Article
Full-text available
Discrete colour morphs coexisting within a single population are common in nature. In a broad range of organisms, sympatric colour morphs often display major differences in other traits, including morphology, physiology or behaviour. Despite the repeated occurrence of this phenomenon, our understanding of the genetics that underlie multi-trait diff...
Article
The consequences of species extinctions in ecological communities may be buffered through the rearrangement (rewiring) of the interactions between the remaining species. The structural and functional consequences of such extinctions can be explored by means of computer simulations that try to predict secondary extinctions and the degradation of eco...
Article
By draining resources, microparasites can negatively affect the host fitness, which in turn can result in reduced transmission when virulence leads to reductions in host population size. Therefore, for a microparasite to persist in nature, the level of harm it can do to its host is expected to be limited. We tested this hypothesis for tick-borne Bo...
Presentation
Full-text available
We present a prototype of a system for the tracking of animals, goods or people, by using only Global System for Mobile Communications (GSM) services. The system consists of two parts: a base device and at least one location device. The base device receives the Short Message Service (SMS) sent by the location devices and forwards the messages to an...
Article
Full-text available
This study describes the importance of reedbed and riparian habitats for the annual cycle of Cetti’s warbler Cettia cetti. We examined the seasonal variation in population structure and body condition using a long-term data set (11 years) from bird ringing. Because seasonal variations in the differential use of each wetland type should be influence...
Article
Full-text available
The yellow and red feather pigmentation of many bird species [1] plays pivotal roles in social signaling and mate choice [2, 3]. To produce red pigments, birds ingest yellow carotenoids and endogenously convert them into red ketocarotenoids via an oxidation reaction catalyzed by a previously unknown ketolase [4-6]. We investigated the genetic basis...
Presentation
Full-text available
As aves selvagens são frequentemente infestadas por carraças e são consideradas reservatório da Borrelia burgdorferi s.l. (sensu lato), um complexo de bactérias transmitidas por carraças, que causam a borreliose de Lyme. De 2010 a 2014 recolhemos 2820 carraças de 690 aves infestadas pertencentes a 40 espécies, e avaliámos a infecção por B. burgdorf...
Poster
Full-text available
The analysis of fatty acids from adipose tissue can provide unique information about physiological and nutritional aspects in bird studies. However, non-lethal biopsy procedures and their potential negative effects have not been assessed in detail for small and medium-sized birds. Here, we showed a biopsy procedure that involves collecting small am...
Article
Full-text available
Analysis of fatty acids from adipose tissue can provide important information about the physiological and nutritional condition of birds. However, non-lethal biopsy procedures and their potential negative effects on small and medium-sized birds have not been adequately assessed. We developed a biopsy procedure for collecting small amounts of adipos...
Book
Voar, pôr ovos, ter um bico… não é exclusivo das aves: o morcego-anão, que é um mamífero, voa; o caracol (gastrópode) e os peixes põem ovos; a tartaruga (réptil) e o polvo também têm bico… A verdadeira particularidade das aves são… os milhares de penas que lhes revestem o corpo e as asas. Há cerca de 10 000 espécies de aves no mundo e este Inventár...
Article
Full-text available
This paper describes a prototype of a system designed to track animals, goods or persons. The system is based exclusively on Global System for Mobile Communications (GSM) services, which are presently widespread. Its advantages and drawbacks are also discussed. The system itself consists of two independent parts: the base device and the location de...
Poster
Full-text available
he food conditions experienced during stopovers can deeply affect the performance of migratory birds, such as the Black-tailed godwit Limosa limosa. This species traditionally foraged on estuarine invertebrates but the intake of rice in stopover and wintering areas of Iberia and coastal Africa is now increasingly important. Understanding how these...
Article
Full-text available
Borrelia turdi is a spirochete from the Borrelia burgdorferi complex, first reported in Japan, that has been increasingly detected in Europe. This genospecies is mostly associated with avian hosts and their ornithophilic ticks such as Ixodes frontalis. In this study, we isolated B. turdi from five I. frontalis feeding on Turdus merula, Turdus philo...
Presentation
Full-text available
The arrival and breeding dates of small migrant birds have advanced throughout Europe. This study evaluates the hypothesis of a faster migration along the migratory route, which should lead to a decrease in stopover duration in staging areas over the last decades. Several climatic predictors were analysed as proxies to understand the stopover ecolo...
Presentation
Full-text available
Wild birds are often infested by ticks and considered reservoirs of the tick-transmitted bacteria Borrelia burgdorferi s.l. (sensu lato), the etiologic agent of Lyme borreliosis. In 2010-2014 we collected 2820 ticks from 690 infested birds of 40 species in Portugal, and assessed their B. burgdorferi s.l. infection by nested PCR. Eight tick species...
Poster
Full-text available
The food conditions experienced during stopovers can deeply affect the performance of migratory birds, such as the Black-tailed godwit Limosa limosa. This species traditionally foraged on estuarine invertebrates but the intake of rice in stopover and wintering areas of Iberia and coastal Africa is now increasingly important. Understanding how these...
Poster
Full-text available
A central goal in biology is to understand the evolution of phenotypic variation. Domesticated species show great phenotypic diversity that often exceeds the one in their wild ancestors. The Domestic Canary (Serinus canaria) is one of the most studied songbirds, and differs widely in song complexity, size, shape, feather ornaments and plumage color...
Article
Full-text available
Wild birds may act as reservoirs for zoonotic pathogens and may be mechanical carriers of pathogen infected vector ticks through long distances during migration. The aim of this study was to assess tick infestation patterns in birds in Portugal and the prevalence of tick infection by Borrelia burgdorferi s.l. using PCR techniques. Seven tick specie...
Conference Paper
We present a prototype of a system for the tracking of animals, goods or people, by using only Global System for Mobile Communications (GSM) services. The system consists of two parts: a base device and at least one location device. The base device receives the Short Message Service (SMS) sent by the location devices and forwards the messages to an...
Poster
Full-text available
The Arctic is an extremely harsh region for most of the year. However, during the summer months it bursts with life. The capacity of migratory birds to fit breeding season and migratory journeys from southern latitudes to the short arctic summer has provided a long-standing riddle. Black-tailed Godwits (Limosa limosa limosa) breeds primarily in Ice...
Poster
Full-text available
Differences between populations of Cetti’s Warbler, especially in moult periods and Autumn: more captures on reedbed (mainly juvenile females) suggesting dispersal movements ; Body condition higher in birds captured on Taipal marsh than Madriz marsh; There wasn’t significant differences on arthropod availability between habitats; The most selected...
Poster
Full-text available
Every year, millions of passerines migrate between their breeding and wintering sites. In between these journeys, they require periodic stopovers to rest and refuel, and the duration and success of these stopovers should be influenced by environmental factors. This study aims to determine the influence of these factors in: (1) stopover duration and...
Article
Full-text available
Adult survival, an important fitness 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,...
Article
Full-text available
White Storks (Ciconia ciconia L.) may cause severe outages in electric networks leading to poor power quality service. Furthermore, bird fatalities often occur as consequence of electrocution. Therefore, equipment damages, economical losses of industry and electric corporations and bird deaths persuaded the main electric distribution operator and t...
Article
Full-text available
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 o...
Presentation
Full-text available
evaluate differences in migration ecology of two warbler species, Sedge Warbler Acrocephalus schoenobaenus and Reed Warbler Acrocephalus scirpaceus, at two stopover sites in Central Portugal. We evaluated also differences between these migratory species and a resident species Cetti’s Warbler Cettia cetti. Sedge Warblers presented significantly high...
Poster
Full-text available
Several studies on population dynamics and migration of ducks have relied on the use of nasal saddles for their marking but little is known about their effects on behaviour of wild ducks. The objective of this paper was to study the effect of nasal saddles on the behaviour of the mallard Anas platyrhynchos. Video was used to register eight behavior...
Book
Full-text available
O MAI (Monitorização de Aves Invernantes) é um projecto da Associação Portuguesa de Anilhadores de Aves, APAA, que visa o estudo das populações de passeriformes invernantes em Portugal com recurso à anilhagem cientifica de aves selvagens. Insere-se no projecto à escala europeia “EURO-CES Constant effort ringing in Europe” promovido pela EURING, bas...
Presentation
Full-text available
Os caniçais são um habitat extremamente rico do ponto de vista ornitológico, sendo frequentados por várias espécies nidificantes e também por um grande número de espécies migradoras em determinados períodos do ano. Das áreas de caniçal relativamente bem preservadas do Baixo Mondego, três estão incluídas em zonas com estatuto de protecção. Uma desta...
Article
Full-text available
Blood parasites may act as modulators of their hosts’ ecology, life histories and fitness. We studied the prevalence of Plasmodium sp., Haemoproteus sp. and Leucocytozoon sp. and their effects on morphological, biochemical and haematological variables and on breeding effort of Great Tits Parus major. Total prevalence (percentage of individuals infe...
Article
Full-text available
La condición de salud de los polluelos puede ser un bioindicador útil de la calidad del ambiente en que éstos están siendo criados. Sin embargo, para poder detectar las respuestas a cambios ambientales, la variación de los parámetros de salud debe ser evaluada en condiciones naturales. Describimos la variación en mediciones morfológicas, bioquímica...

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Projects

Projects (12)
Project
This project aims at deepening our understanding of how dietary n-3 LCPUFAs affects physiological function and cascades to determine flight performance in migratory animals, and how migratory species without dietary access to n-3 LCPUFAs can obtain these fatty acids to improve their health and survival prospects, with state-of-the-art physiological tools.
Archived project
Avaliar a importancia dos campos de arroz em espécies migratórias de longa distância
Archived project
In order to investigate differences in fat composition for birds with distinct migratory strategies we sampled two wader populations that winter in the same location but travel different distances to their breeding grounds and do with long or short flights. Black-tailed godwits and Grey plovers wintering in Western Europe feed almost exclusively in estuarine mudflats, but whilst Grey plovers migrate to the artic via Scandinavia making several stops along the way, Black-tailed godwits breed in Iceland (sub-artic) and only those south of the British Iles make one stop-over (with most individuals going via the Netherlands) before undertaking non-stop flight over the Atlantic Ocean to the breeding grounds (Alves el al 2011).The fat reserves and the mobilization of these reserves should be different. We therefore aimed at assessing if Black-tailed godwits and Grey plovers differ in fat composition due the differential migratory strategies.