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Repositório do ISPA Instituto Superior de Psicologia Aplicada (10.591 recursos)

No Repositório do ISPA pode encontrar diversos tipos de documentos, em formato digital, resultantes da produção científica do ISPA designadamente: teses de doutoramento, teses de mestrado, artigos em publicações periódicas nacionais e internacionais, relatórios técnicos, artigos em actas de conferências nacionais e internacionais e capítulos de livros.

Biologia

Mostrando recursos 1 - 8 de 8

  1. A behavioural study on environmental enrichment in the common octopus, Octopus vulgaris cuvier, 1798

    Severino, David Peniche de Carvalho
    Dissertação de Mestrado apresentada ao ISPA - Instituto Universitário

  2. Understanding the mechanisms of antitropical divergencein the seabird White-faced Storm-petrel (Procellariiformes:Pelagodroma marina) using a multilocus approach

    Silva, Mónica C.; Matias, Rafael; Wanless, Ross M.; Ryan, Peter G.; Stephenson, Brent M.; Bolton, Mark; Ferrand, Nuno; Coelho, Manuela M.
    Analytical methods that apply coalescent theory to multilocus data have improved infer-ences of demographic parameters that are critical to understanding population divergenceand speciation. In particular, at the early stages of speciation, it is important to implementmodels that accommodate conflicting gene trees, and benefit from the presence of sharedpolymorphisms. Here, we employ eleven nuclear loci and the mitochondrial control regionto investigate the phylogeography and historical demography of the pelagic seabirdWhite-faced Storm-petrel (Pelagodroma marina)bysamplingsubspeciesacrossitsanti-tropical distribution. Groups are all highly differentiated: global mitochondrial ΦST= 0.89(P < 0.01) and global nuclear ΦSTvaries between 0.22 and 0.83 (all P < 0.01). The completelineage sorting of...

  3. Enhancing carcass removal trials at three wind energy facilities in Portugal

    Bernardino, Joana; Bispo, Regina; Torres, Paulo; Rebelo, Rui; Mascarenhas, Miguel; Costa, Hugo
    During the last years there has been a significant worldwide increase in the number of wind farms. This kind of energy can have negative impacts, such as the direct mortality or lethal injury of birds and bats caused by collision with wind turbines. In order to evaluate bird (or bat) mortality regarding wind power generation facilities, strict monitoring protocols are required which must take into account the possibility of carcass removal by scavenging animals or decomposition before the monitoring session. For this purpose, carcass removal trials with 180 carcasses representing three size classes (small, medium and large) were conducted in...

  4. Effect of Simulated Gastrointestinal Conditions on Biofilm Formation by Salmonella 1,4,[5],12:i:-

    Seixas, Rui; Gabriel, Marta; Machado, Jorge; Tavares, Luís; Bernardo, Fernando; Oliveira, Manuela
    Salmonella Typhimurium 1,4,[5],12:i:- is a major serovar responsible for human salmonellosis whose biofilm-forming ability, influenced by environmental conditions like those found in the gastrointestinal tract, is one of the main contributing factors to its ability to persist in the host and thus one of the main causes of chronic relapsing infections. Most studies to evaluate biofilm formation are performed in microtiter assays using standard media. However, no reports are available on the ability of this serovar to produce biofilm under in vitro simulated gastrointestinal conditions which better correlate with the environment found in the gastrointestinal tract. To address this, a modified biofilm assay simulating intestinal...

  5. Accounting for animal density gradients using independent information in distance sampling surveys

    Marques, Tiago A.; Buckland, Stephen T.; Bispo, Regina; Howland, Brett
    Distance sampling is extensively used for estimating animal density or abundance. Conventional methods assume that location of line or point transects is random with respect to the animal population, yet transects are often placed along linear features such as roads, rivers or shorelines that do not randomly sample the study region, resulting in biased estimates of abundance. If it is possible to collect additional data that allow an animal density gradient with respect to the transects to be modelled, we show how to extend the conventional distance sampling likelihood to give asymptotically unbiased estimates of density for the covered area. We illustrate the proposed methods using data for...

  6. Effects of partial root-zone drying irrigation on cluster microclimate and fruit composition of field-grown Castelão grapevines

    Santos, Tiago P.; Lopes, Carlos Manuel Antunes; Rodrigues, M. Lucília; Souza, Cláudia R. de; Silva, Jorge R.; Maroco, João; Pereira, João Santos; Chaves, Maria Manuela
    The partial root-zone drying (PRD) irrigation technique has been proposed for viticulture as a possible way to save water without compromising yield. Half of the plant root system is slowly dehydrating whereas the other half is irrigated; after about two weeks the opposite side of vines is irrigated. A PRD irrigation system (50 % of the crop evapotranspiration - ETc) was installed in a vineyard (Vitis vinifera L. cv. Castelão) in Southern Portugal and compared with two other irrigation systems, deficit irrigation, DI (50 % ETc) and full irrigation, FI (100 % ETc), as well as with non-irrigated vines (NI). Water was applied twice a week, from fruit set (mid-June) until...

  7. Partial rootzone drying: effects on growth and fruit quality of field-grown grapevines (Vitis vinifera)

    Santos, Tiago P.; Lopes, Carlos Manuel Antunes; Rodrigues, M. Lucília; Souza, Cláudia R. de; Maroco, João; Pereira, João Santos; Silva, Jorge R.; Chaves, Maria Manuela
    A study to assess the effects of the Partial Rootzone Drying (PRD) irrigation strategy in comparison to other irrigation systems was carried out in southern Portugal in two field-grown grapevines varieties, Moscatel and Castelão. We addressed the question of whether by regulating growth and plant water use, the PRD system would enable an equilibrated vegetative development, leading to a favourable capture of solar radiation for photoassimilate production and, at the same time to provide an optimum environment for fruit maturation. Three irrigation schemes were applied in addition to the non-irrigated (NI) vines: partial root drying (PRD), 50% of crop evapotranspiration...

  8. Multilocus phylogenetic analysis of the genus Atherina (Pisces: Atherinidae)

    Francisco, Sara Martins; Congiu, Leonardo; von der Heyden, Sophie; Almada, Vítor Carvalho
    Sand-smelts are small fishes inhabiting inshore, brackish and freshwater environments and with a distribution in the eastern Atlantic and Mediterranean Sea, extending south into the Indian Ocean. Here, we present a broad phylogenetic analysis of the genus Atherina using three mitochondrial (control region, 12S and 16S) and two nuclear markers (rhodopsin and 2nd intron of S7). Phylogenetic analyses fully support the monophyly of the genus. Two anti-tropical clades were identified, separating the South African Atherina breviceps from the north-eastern Atlantic and Mediterranean Atherina’ species. In European waters, two groups were found. The first clade formed by a well supported species-pair: Atherina presbyter (eastern Atlantic) and Atherina hepsetus...

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