Recursos de colección

Repositorio da Universidade dos Açores (8.391 recursos)

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

Departamento de Ciências Agrárias

Mostrando recursos 1 - 20 de 210

  1. Efeitos de impactos ambientais na mastofauna de áreas protegidas em ambiente antropizado

    Cunha, Fernanda Almeida
    Dissertação de Mestrado, Gestão e Conservação da Natureza, 21 de Abril de 2017, Universidade dos Açores.

  2. Desperdício de produtos hortofrutícolas percebido por famílias de uma freguesia citadina nos Açores

    Marinho, Maria Cristina da Silva Ribeiro
    Dissertação de Mestrado, Gestão e Conservação da Natureza, 15 de Março de 2017, Universidade dos Açores

  3. 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.

  4. 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...

  5. 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...

  6. 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...

  7. Crocodylia : Uma longa história de sucesso evolutivo

    Barreiros, João P.
    Neste artigo pretende-se descrever a história evolutiva dos crocodilos bem como as espécies actualmente existentes no Mundo referindo os principais aspectos da sua ecologia tais como distribuição geográfica, tamanhos máximos e eventual perigosidade para humanos, habitats e alimentação, aspectos reprodutivos, conservação e produção para consumo humano. A Ordem Crocodylia divide-se em três famílias, Alligatoridae, Crocodylidae e Gavialidae que compreendem 23 espécies vivas distribuídas por todos os continentes com excepção da Europa e da Antárctica. São um dos grupos de répteis mais antigos com um processo evolutivo relativamente bem conhecido e que data desde há 320 milhões de anos tendo sobrevivido...

  8. O Cachalote : Um Emblema dos Açores

    Barreiros, João P.
    De entre as mais de 25 espécies de Cetáceos comprovadamente ocorrentes nos mares dos Açores, certamente que o Cachalote (Physeter macrocephalus) se destaca como a mais emblemática e conhecida de todas. [...].

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

    Barreiros, João P.
    Letter To Editor

  10. Invasions changing marine biodiversity

    Barreiros, João P.
    Letter To Editor

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

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

  12. 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

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

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

  14. Newsletter of the Groupers and Wrasses Specialist Group of the International Union for the Conservation of Nature

    To, Allen; Bertoncini, Áthila A.; Barreiros, João P.; Mitcheson, Yvonne Sadovy de; Craig, Matthew
    After a long hiatus, we have finally assembled another newsletter for the Groupers & Wrasses IUCN Specialist group. This would not have possible without the leadership of Áthila Bertoncini, who formatted and compiled all of your contributions, Allen To and João Pedro Barreiros, we are most grateful for everybody’s efforts. […].

  15. Stranding of four Sowerby's beaked whales (Mesoplodon bidens) in Terceira, Azores

    Bachara, Wojtek; Barreiros, João P.
    Sowerby's beaked whales are little known members of the beaked whale family (Ziphiidae). Based on data collected from strandings, this species is found in temperate and subarctic waters in the eastern and western North Atlantic. A very rare stranding record, involving four juvenile animals, found dead in the Azores, is here reported.

  16. Animais aquáticos venenosos e perigosos da Europa com ênfase em Portugal Continental e Ilhas

    Haddad Jr., Vidal; Barreiros, João P.
    A listagem abaixo, tecnicamente desenvolvida ao longo de um trabalho de pesquisa de cerca de seis anos, pretende descrever e informar o leitor sobre dados adicionais que complementam o livro acima mencionado. Os acidentes com animais marinhos são uma realidade que, na Europa em geral e em Portugal, incluindo Madeira e Açores, tem sido pouco ou nada estudada embora cause, anualmente, um número elevado – mas não devidamente quantificado – de acidentes com diversos graus de gravidade que podem ir desde pequenas lesões benignas até óbitos por causa directa ou indirecta, nomeadamente, afogamentos.

  17. 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.

  18. O bivalve Pinna rudis : ocorrência e associação com o crustáceo decápode Pontonia pinnophylax na ilha Terceira (Açores, NE Atlântico)

    Barreiros, João P.; Pacheco, Ricardo J.; Gonçaives, Sílvia C.
    Pinna rudis é um dos maiores bivalves que ocorrem nos Açores atingindo comprimentos superiores a SOem. Apesar de existirem numerosos registos provenientes de mergulhadores o conhecimento da biologia desta espécie é muito reduzido não havendo estudos espedficos na literatura disponfvel. Esta espécie encontra-se fixa por numerosos filamentos (Courtney e Couch, 1981), com a sua parte basal pontiaguda verticalmente enterrada no substrato (lodoso, arenoso ou de granulometria superior) (Zavodnick et ai., 1991; Richardson et ai., 1999) (Figuras 1 a, b). Assim, é impossível medir o comprimento total dos indivíduos in situ. P. rudis é igualmente o hospedeiro do camarão Pontonia pinnophylax...

  19. 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...

  20. 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...

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