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 Biologia

Mostrando recursos 1 - 20 de 216

  1. Modeling adult emergence and fecundity of factitious hosts under different food sources supports massive egg production management

    Tavares, João; Silva, Luís; Oliveira, Luísa
    COPYRIGHT: © Cambridge University Press 2017

  2. Potential of Trichogramma achaeae (Hymenoptera : Trichogrammatidae) in Biological Control of Tuta absoluta (Lepidoptera: Gelechiidae) in Azorean Greenhouse Tomato Crops

    Oliveira, Luísa; Durão, Ana C.; Fontes, João; Roja, Inês S.; Tavares, João
    Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) is an important pest of tomato crops. It is native to South America and has rapidly extended its range into Mediterranean countries. The parasitoid Trichogramma achaeae Nagaraja and Nagarkatti (Hymenoptera: Trichogrammatidae) has been recommended as a possible biological control agent of this invasive pest. The pest and parasitoid were accidentally introduced into the Azores Islands and became well-established owing to the climate conditions of the region. During an undertaken survey to determine the presence of natural parasitism, 2.5% of the T. absoluta eggs were found to be parasitized by Tr. achaeae, and no other egg...

  3. Potential of Trichogramma achaeae (Hymenoptera : Trichogrammatidae) in Biological Control of Tuta absoluta (Lepidoptera: Gelechiidae) in Azorean Greenhouse Tomato Crops

    Oliveira, Luísa; Durão, Ana C.; Fontes, João; Roja, Inês S.; Tavares, João
    Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) is an important pest of tomato crops. It is native to South America and has rapidly extended its range into Mediterranean countries. The parasitoid Trichogramma achaeae Nagaraja and Nagarkatti (Hymenoptera: Trichogrammatidae) has been recommended as a possible biological control agent of this invasive pest. The pest and parasitoid were accidentally introduced into the Azores Islands and became well-established owing to the climate conditions of the region. During an undertaken survey to determine the presence of natural parasitism, 2.5% of the T. absoluta eggs were found to be parasitized by Tr. achaeae, and no other egg...

  4. Comunicação do risco em segurança alimentar

    Ferreira, Carla Dina Aguiar Ormonde
    Dissertação de Mestrado, Ambiente, Saúde e Segurança, 21 de Março de 2017, Universidade dos Açores.

  5. Indicadores em planos de pormenor

    Fortuna, Carla Patrícia Melo
    Dissertação de Mestrado, Ambiente, Saúde e Segurança, 9 de Março de 2017, Universidade dos Açores.

  6. Práticas ambientais dos produtores de leite de São Miguel : comparação entre produtores certificados e não certificados

    Condinho, Paula Catarina Melo
    Dissertação de Mestrado, Ambiente, Saúde e Segurança, 6 de Março de 2017, Universidade dos Açores.

  7. Guia de campo dos cetáceos dos Açores

    Fernandez, Marc; Faria, João; Cravinho, Miguel; Neto, Ana I.; Azevedo, José M. N.
    Os Cetáceos (baleias e golfinhos) são um dos 5 grupos de mamíferos marinhos, juntamente com os pinípedes (focas, otárias e morsas), os sirénios (manatins e dugongos), as lontras e os ursos polares. Evidências moleculares e fósseis sugerem que baleias e golfinhos incluem-se dentro dos artiodáctilos, o grupo de mamíferos com cascos em número par, e.g. porcos, vacas e hipopótamos.

  8. Guia de campo dos cetáceos dos Açores

    Fernandez, Marc; Faria, João; Cravinho, Miguel; Neto, Ana I.; Azevedo, José M. N.
    Os Cetáceos (baleias e golfinhos) são um dos 5 grupos de mamíferos marinhos, juntamente com os pinípedes (focas, otárias e morsas), os sirénios (manatins e dugongos), as lontras e os ursos polares. Evidências moleculares e fósseis sugerem que baleias e golfinhos incluem-se dentro dos artiodáctilos, o grupo de mamíferos com cascos em número par, e.g. porcos, vacas e hipopótamos.

  9. Guia do Ilhéu de Vila Franca do Campo

    Faria, João; Álvaro, Nuno V.; Costa, Tarso; Azevedo, José M. N.; Neto, Ana I.
    O ilhéu de Vila Franca do Campo é uma cratera vulcânica afundada e quase circular que está localizada a 400 metros de Vila Franca do Campo, na costa sudeste da ilha de São Miguel. [...]. Em 1983 a área terrestre do Ilhéu foi declarada Reserva Natural pelo Governo Regional dos Açores. Em 2004 a área de reserva foi incrementada para incluir a zona marítima adjacente num perímetro de 350 metros. Atualmente integra o Parque Natural de Ilha de São Miguel como área protegida para a gestão de habitats e espécies. O seu estatuto de conservação prevê a proteção do património...

  10. Guia do Ilhéu de Vila Franca do Campo

    Faria, João; Álvaro, Nuno V.; Costa, Tarso; Azevedo, José M. N.; Neto, Ana I.
    O ilhéu de Vila Franca do Campo é uma cratera vulcânica afundada e quase circular que está localizada a 400 metros de Vila Franca do Campo, na costa sudeste da ilha de São Miguel. [...]. Em 1983 a área terrestre do Ilhéu foi declarada Reserva Natural pelo Governo Regional dos Açores. Em 2004 a área de reserva foi incrementada para incluir a zona marítima adjacente num perímetro de 350 metros. Atualmente integra o Parque Natural de Ilha de São Miguel como área protegida para a gestão de habitats e espécies. O seu estatuto de conservação prevê a proteção do património...

  11. Estudando e valorizando os cetáceos dos Açores

    Cecchetti, Arianna; Fernandez, Marc; Azevedo, José M. N.
    Nos Açores ocorrem pelo menos 25 espécies diferentes de cetáceos (baleias e golfinhos). Algumas podem observar-se facilmente durante todo o ano, mas outras são menos visíveis, quer por ocorrerem apenas em épocas específicas quer pelo seu comportamento furtivo. Todas as espécies de cetáceos estão protegidas legalmente, e algumas têm um estatuto de conservação que requer medidas especiais de gestão. Estas medidas requerem, no entanto, conhecimentos de base sobre abundância e distribuição que infelizmente é insuficiente. Para além dos argumentos conservacionistas os cetáceos constituem um recurso económico relevante para o sector do turismo nos Açores. Por esta razão torna-se ainda mais...

  12. A importância dos estudos de impacto das atividades turísticas sobre os padrões comportamentais dos cetáceos

    Cecchetti, Arianna; Azevedo, José M. N.
    O impacto das atividades turísticas no comportamento dos cetáceos é um assunto que tem sido estudado em diferentes áreas geográficas e para diferentes espécies. Trata-se de um tema que recentemente está a tornar-se ainda mais importante devido ao grande desenvolvimento das atividades de observação de cetáceos em certas regiões, como as Canárias, assim como de práticas mais intrusivas, como a natação com golfinhos. […].

  13. CIRN/GREC 2014 Campaign report

    Fernandez, Marc; Gannier, Alexandre; Azevedo, José M. N.
    A cetacean survey campaign was performed around São Miguel Island (Azores) by Anacaona Sailing boat (GREC) from May 8th to May 17th and from July 4th to August 1st of 2014. The team conducted a total of 18 days of effort around the island. A total of 9 species were sighted during the survey: common dolphin (Delphinus delphis), atlantic spotted dolphin (Stenella frontalis), bottlenose dolphin (Tursiops trucnatus), stripped dolphin (Stenella coeruleoalba), risso’s dolphin (Grampus griseus), sperm whale (Physter macrocephalus), fin whale (Balaenoptera physalus), false killer whale (Pseudorca crassidens) and Blainville beaked whale (Mesoplodon densirostris). The common dolphin together with the...

  14. CIRN/GREC 2013 Campaign report

    Fernandez, Marc; Gannier, Alexandre; Azevedo, José M. N.
    A cetacean survey campaign was performed around São Miguel Island (Azores) by Anacaona Sailing boat (GREC) from July 13th to August 24th of 2013. The team conducted a total of 22 days of effort around the island. A total of 8 species was sighted during the survey: common dolphin (Delphinus delphis), atlantic spotted dolphin (Stenella frontalis), bottlenose dolphin (Tursiops trucnatus), stripped dolphin (Stenella coeruleoalba), risso’s dolphin (Grampus griseus), sperm whale (Physter macrocephalus), sei whale (Balaenoptera borealis) and beaked whales (Mesoplodon sp.). The common dolphin together with the atlantic spotted dolphin were the most sighted species. Some differences in the distribution...

  15. Factsheet NetBiome-CSA : Strengthening European research cooperation for smart and sustainable management of tropical and subtropical biodiversity in outermost regions and overseas countries and territories

    Azevedo, José M. N.
    EU-funded NetBiome-CSA has mobilised 13 entities from seven regions and territories across the Pacific, Indian and Atlantic oceans. Project participants are moving in the same direction for the smart and sustainable management of tropical and subtropical biodiversity in the EU’s outermost regions (ORs) and overseas countries and territories (OCTs). These are well-known hotspots of terrestrial, freshwater and marine biodiversity. Biology Professor José Azevedo, who coordinates NetBiome-CSA from Portugal says, "The first task in the NetBiome-CSA project was to increase the number and range of stakeholders working together. We have mobilised 130 stakeholders, including researchers, policy makers, business people and members of...

  16. Spatial segregation of calving and nursing Risso’s dolphins (Grampus griseus) in the Azores, and its conservation implications

    Hartman, Karin L.; Fernandez, Marc; Azevedo, José M. N.
    Calving can be a critical period for cetaceans. Areas providing security for vulnerable calves, and high food availability for lactating females can be critical habitats requiring specific conservation measures. Here, we test the hypothesis that calving and nursing habitat could be defined for Risso’s dolphins (Grampus griseus). We investigated the spatial and temporal preferences of this species around Pico Island, Azores, using data gathered from land-based surveys and dedicated at-sea observations between 2004 and 2007. We divided observed pods into three groups: (1) those with newborn and young calves, (2) those with older calves or juveniles and (3) those consisting...

  17. Temperate facultative cleaner wrasses selectively remove ectoparasites from their client-fish in the Azores

    Narvaez, Pauline; Furtado, Miguel; Neto, Ana I.; Moniz, Isadora; Azevedo, José M. N.; Soares, Marta S. C.
    Cleaner fishes are key contributors to the health of fish communities. However, much of the information in the literature refers to tropical systems, while fewer studies have examined the activity of cleaner fish inhabiting temperate ecosystems. Facultative cleaner fish are assumed to clean only during their juvenile phase, and have a broader diet than obligatory cleaner fish. Here, we focused on 2 facultative cleaner fish species, Coris julis and Thalassoma pavo, that live along the temperate coasts of the Azorean island of São Miguel. We found that these species focused their cleaning activities on relatively few species of clients, which...

  18. Sex differences in residency patterns of Risso's dolphins (Grampus griseus) in the Azores : causes and management implications

    Hartman, Karin L.; Fernandez, Marc; Wittich, Anja; Azevedo, José M. N.
    Knowledge of the residency patterns of marine mammals is an important element for management and conservation strategies. Here we investigate a population of Grampus griseus off Pico Island, Azores. Our data set covers the period 2004–2007, based on at-sea observations of 1,250 individually identified animals, 303 of known or assumed sex. Using photo identification and GPS locations we calculated mean monthly sighting rates and lagged identification rates to analyze temporal patterns, and estimated kernel density to study the home range. Our results show site fidelity and relatively restricted home ranges, which corroborate the existence of a resident population on the...

  19. Nature-based solutions : new influence for environmental management and research in Europe

    Eggermont, Hilde; Balian, Estelle; Azevedo, José M. N.; Beumer, Victor; Brodin, Tomas; Claudet, Joachim; Fady, Bruno; Grube, Martin; Keune, Hans; Lamarque, Penelope; Reuter, Katrin; Smith, Matt; van Ham, Chantal; Weisser, Wolfgang W.; Le Roux, Xavier
    Greening roofs or walls to cool down city areas during summer, to capture storm water, to abate pollution, and to increase human well-being while enhancing biodiversity: nature-based solutions (NBS) refer to the sustainable management and use of nature for tackling societal challenges. Building on and comple- menting traditional biodiversity conservation and management strategies, NBS integrate science, policy, and practice and create biodiversity benefits in terms of diverse, well-managed ecosystems.

  20. Differences in the structure and functioning of two communities : frondose and turf-forming macroalgal dominated habitats

    Martins, Gustavo M.; Hipólito, Cláudia; Parreira, Filipe; Prestes, Afonso L.; Dionísio, Maria Ana; Azevedo, José M. N.; Neto, Ana I.
    In many coastal regions, vegetated habitats (e.g. kelps forests, seagrass beds) play a key role in the structure and functioning of shallow subtidal reef ecosystems, by modifying local environmental conditions and by providing food and habitat for a wide range of organisms. In some regions of the world, however, such idiosyncratic ecosystems are largely absent and are often replaced by less notable ecosystem formers. In the present study, we empirically compared the structure and functioning of two distinct shallow-water habitats present in the Azores: one dominated by smaller frondose brown macroalgae (Dictyotaceae and Halopteris) and one dominated by low-lying turfs....

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