Recursos de colección

Repositorio da Universidade dos Açores (8.397 recursos)

O Repositório Institucional da Universidade dos Açores desenvolvido no âmbito do projecto RCAAP.

DCA - Artigos em Revistas Internacionais / Articles in International Journals

Mostrando recursos 1 - 20 de 63

  1. Description of an eye barotrauma in scuba diving with clinical discussion

    Barreiros, Pedro; Haddad Jr., Vidal; Barreiros, João P.
    In this paper we report and discuss a scuba diving accident caused by compression of the mask at a depth of 9.1 m resulting in conjunctiva haemorrhage of both eyes in a 21-year-old male. After five weeks and benefiting from immediate post-accident medical attention and medication followed by ophthalmologic examinations the patient recovered with no chronic effects neither in vision nor in the eyes.

  2. Differential survival and reproduction in colour forms of Philaenus spumarius give new insights to the study of its balanced polymorphism

    Silva, Sara E.; Rodrigues, Ana S. B.; Marabuto, Eduardo; Yurtsever, Selçuk; Borges, Paulo A. V.; Quartau, José A.; Paulo, Octávio S.; Seabra, Sofia G.
    1. Colour polymorphisms are common across animals and are often the result of complex selection regimes. Philaenus spumarius (Linnaeus) (Hemiptera, Aphrophoridae) shows a widely studied dorsal colour polymorphism with several described phenotypes whose variation in their occurrence and frequency, as well as their maintenance across time, have been reported. Several selective influences have been suggested to play a role, but the mechanisms underlying the maintenance of this polymorphism are still poorly understood. 2. To explore the adaptive significance of the colour polymorphism of P. spumarius, an experiment was conducted in captivity under semi-natural conditions to measure survival, reproductive success, and duration...

  3. Comparative phylogeography of endemic Azorean arthropods

    Parmakelis, Aristeidis; Rigal, François; Mourikis, Thanos; Balanika, Katerina; Terzopoulou, Sofia; Rego, Carla; Amorim, Isabel R.; Crespo, Luís C.; Pereira, Fernando E. A.; Triantis, Kostas A.; Whittaker, Robert J.; Borges, Paulo A. V.
    BACKGROUND: For a remote oceanic archipelago of up to 8 Myr age, the Azores have a comparatively low level of endemism. We present an analysis of phylogeographic patterns of endemic Azorean island arthropods aimed at testing patterns of diversification in relation to the ontogeny of the archipelago, in order to distinguish between alternative models of evolutionary dynamics on islands. We collected individuals of six species (representing Araneae, Hemiptera and Coleoptera) from 16 forest fragments from 7 islands. Using three mtDNA markers, we analysed the distribution of genetic diversity within and between islands, inferred the differentiation time-frames and investigated the inter-island...

  4. Modeling directional spatio-temporal processes in island biogeography

    Carvalho, José C.; Cardoso, Pedro; Rigal, François; Triantis, Kostas A.; Borges, Paulo A. V.
    A key challenge in island biogeography is to quantity the role of dispersal in shaping biodiversity patterns among the islands of a given archipelago. Here, we propose such a framework. Dispersal within oceanic archipelagos may be conceptualized as a spatio-temporal process dependent on: (1) the spatial distribution of islands, because the probability of successful dispersal is inversely related to the spatial distance between islands and (2) the chronological sequence of island formation that determines the directional asymmetry of dispersal (hypothesized to be predominantly from older to younger islands). From these premises, directional network models may be constructed, representing putative connections...

  5. Why Flightless Birds are 'Condemned' to Lay Eggs

    Barreiros, João P.
    Letter To Editor

  6. Invasions changing marine biodiversity

    Barreiros, João P.
    Letter To Editor

  7. Zoo animals and humans killed because of human negligent behavior

    Barreiros, João P.; Haddad Jr., Vidal
    Letter to Editor

  8. Solidarity Fishing : Spear Fishing of Alien Fish Feeds People

    Barreiros, João P.; Ponte, Dário Dinis Sousa; Santos, Cristina Sousa; Medeiros, João
    info:eu-repo/semantics/publishedVersion

  9. Science Knows the Answers for Fishing but Politicians Are Acting the Wrong Way

    Barreiros, João P.
    info:eu-repo/semantics/publishedVersion

  10. The importance of post-mortem examinations in cetacean biology : a report of a necropsy on Stenella coeruleoalba (Meyen, 1833) (Cetacea: Delphinidae), from the Azores, Northeastern Atlantic

    Sedrez, Mário C.; Barcelos, João; Barreiros, João P.
    This article reports the necropsy of a specimen of striped dolphin Stenella coeruleoalba found stranded in the north coast of Terceira Island, Azores, Portugal. Here, the importance of standard protocols in post-mortem examinations and the need to adequately proceed were discussed. Stranded marine mammals are valuable specimens for several studies of pathology and other veterinary medical aspects. Although the causa mortis was not determined, the full access to stranded specimens was crucial, not only for pathology studies but also for a proper training to veterinary medicine students whenever possible.

  11. Diet of Dasyatis pastinaca and Myliobatis aquila (Myliobatiformes) from the Azores, NE Atlantic

    Ponte, Dário Dinis Sousa; Barcelos, Luís Miguel Duarte; Santos, Cristina Sousa; Medeiros, João; Barreiros, João P.
    This paper describes and discusses the feeding ecology of two stingray species that occur in the Azores: Dasyatis pastinaca and Myliobatis aquila. Both are common coastal species associated with sandy, muddy and rocky bottoms, from surface waters to depths of over 200 m. The diet described here is based on the stomach content analysis from 33 specimens (23 D. pastinaca, 10 M. aquila) collected by spearfishing between June and October 2010 at three different locations along the coast of Terceira Island, Azores. Food habits of D. pastinaca consist mainly of Decapod crustaceans (with a relevance for Pachygrapsus marmoratus) followed by...

  12. Diet of Dasyatis pastinaca and Myliobatis aquila (Myliobatiformes) from the Azores, NE Atlantic

    Ponte, Dário Dinis Sousa; Barcelos, Luís Miguel Duarte; Santos, Cristina Sousa; Medeiros, João; Barreiros, João P.
    This paper describes and discusses the feeding ecology of two stingray species that occur in the Azores: Dasyatis pastinaca and Myliobatis aquila. Both are common coastal species associated with sandy, muddy and rocky bottoms, from surface waters to depths of over 200 m. The diet described here is based on the stomach content analysis from 33 specimens (23 D. pastinaca, 10 M. aquila) collected by spearfishing between June and October 2010 at three different locations along the coast of Terceira Island, Azores. Food habits of D. pastinaca consist mainly of Decapod crustaceans (with a relevance for Pachygrapsus marmoratus) followed by...

  13. Camouflage of the seahorse Hippocampus reidi with plastic debris : an unusual type of protective resemblance

    Marques, Simone; Barreiros, João P.
    Camouflage is one of the strategies of reef fishes, in which they mimic other species or use the background to match the combination of their colors and textures (Randall 2005). Seahorses of the genus Hippocampus in a pristine habitat generally use saturated colors to camouflage their colorful background using matching or confusing objects as a deceiving mode (Stevens & Merilaita 2011). The present record is the first description of camouflage by the sea horse Hippocampus reidi Ginsburg, 1933 with plastic debris in mangroves from NE Brazil: Formoso River, Tamandaré, Pernambuco State (8°41′01.51″S, 35°06′25.92″ W). […].

  14. A new insight on the symbiotic association between the fan mussel Pinna rudis and the shrimp Pontonia pinnophylax in the Azores (NE Atlantic)

    Barreiros, João P.; Pacheco, Ricardo J.; Gonçalves, Sílvia C.
    The present record is the first ecological study on the symbiotic association between the fan mussel Pinna rudis Linnaeus, 1758 and the shrimp Pontonia pinnophylax (Otto, 1821) in European Atlantic shallow waters – Azores (Portugal). [...].

  15. The parasitic isopod Anilocra physodes, as a novel food source for the lizardfish Synodus saurus (Synodontidae).

    Narvaez, Pauline; Barreiros, João P.; Soares, Marta S. C.
    Copyright © 2015 Société Française d'Ichtyologie.

  16. Opportunistic feeding behavior of Diplodus argenteus (Perciformes, Sparidae) : human-fish interaction in two rocky reefs from SE and S Brazil

    Marques, Simone; Barreiros, João P.
    Comportamento alimentar oportunista do marimbá Diplodus argenteus (Perciformes, Sparidae): interação humana-peixe em dois sistemas de costões rochosos do SE e SU do Brasil. Esse artigo aborda dois tipos de comportamentos alimentares do marimbá Diplodus argenteus em dois sistemas de costões rochosos do Atlântico sul no Brasil. Essa espécie alimentou-se sobre o fundo e exibiu comportamentos ocasionais e oportunísticos.

  17. Occurrence of Diodon eydouxii (Actinopterygii: Diodontidae), in the Azores and comparison with Pacific specimens

    Barreiros, João P.; Fricke, Ronald
    A specimen of porcupine fish was collected by a fisherman at Terceira Island, Azores (north-eastern Atlantic), and identified as the pelagic porcupinefish, Diodon eydouxii Brisout de Barneville, 1846, a species recently recorded for the first time from the Azores. This record, together with an examination of the first reported specimen, allowed us to compare the external morphology with Pacific specimens. The possibility of this species to be relatively common in the Azores is discussed.

  18. Assessing the conservation status of the strict endemic Desertas wolf spider, Hogna ingens (Araneae, Lycosidae)

    Crespo, Luís C.; Silva, Isamberto; Borges, Paulo A. V.; Cardoso, Pedro
    The Desertas Islands (Madeira, Portugal) are the sole home of one of the largest and rarest wolf spiderspecies, Hogna ingens (Blackwall 1857) (Araneae, Lycosidae). Despite its size, it inhabits a single valleyin the North of the Deserta Grande Island, Vale da Castanheira, currently invaded by the herb Phalarisaquatica. This invasive species competes with the native flora and was subject to several eradicationexperiments, namely through fire and chemicals. The objectives of this work were to: (1) estimate thecurrent distribution and abundance of H. ingens and respective trends; (2) evaluate the impact of theinvasive plant and eradication methods on the spider population;...

  19. Cryptotermes brevis (Isoptera: Kalotermitidae) in the Azores : Lessons After 2 yr of Monitoring in the Archipelago

    Borges, Paulo A. V.; Guerreiro, Orlando; Ferreira, Maria T.; Borges, Annabella; Ferreira, Filomena; Bicudo, Nuno; Nunes, Lina; Marcos, Rita S.; Arroz, Ana Margarida Moura; Scheffrahn, Rudolf H.; Myles, Timothy G.
    The dispersal flights of West Indian drywood termite, Cryptotermes brevis (Walker) (Isoptera: Kalotermitidae) were surveyed in the major cities of Azores. The sampling device used to estimate termite density consisted of a yellow adhesive trap (size 45 by 24 cm), placed with an artificial or natural light source in a dark attic environment. In addition, data from two other projects were used to improve the knowledge about the geographical distribution of the species. The level of infestation in the two main Azorean towns differed, with high levels in the houses of Angra do Heroísmo, whereas in Ponta Delgada, there are...

  20. Functional biogeography of oceanic islands and the scaling of functional diversity in the Azores

    Whittaker, Robert J.; Rigal, François; Borges, Paulo A. V.; Cardoso, Pedro; Terzopoulou, Sofia; Casanoves, Fernando; Pla, Laura; Guilhaumon, François; Ladle, Richard J.; Triantis, Kostas A.
    Analyses of species-diversity patterns of remote islands have been crucial to the development of biogeographic theory, yet little is known about corresponding patterns in functional traits on islands and how, for example, they may be affected by the introduction of exotic species. We collated trait data for spiders and beetles and used a functional diversity index (FRic) to test for nonrandomness in the contribution of endemic, other native (also combined as indigenous), and exotic species to functional-trait space across the nine islands of the Azores. In general, for both taxa and for each distributional category, functional diversity increases with species...

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