344 research outputs found

    Mixed-ethnicity face shape and attractiveness in humans

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    Many studies show agreement within and between populations and cultures for general judgments of facial attractiveness. Studies that have examined the attractiveness of specific traits have also highlighted cross-cultural differences for factors such as symmetry, averageness, and masculinity. One trait that should be preferred across cultures is heterozygosity. Indeed, several studies suggest that mixed ethnicity, in terms of appearing to possess a mixture of traits from different human population groups, may be found attractive, which could reflect preferences for heterozygosity. We examined preferences for manipulated face shape associated with different populations in both Europeans (Britain) and Africans (Guinea-Bissau). We found that mixed-ethnicity face shapes were more attractive than enhanced single-ethnicity face shape across both populations. These results are consistent with evolutionary theories suggesting individuals should prefer heterozygosity in partners because facial cues to mixed-ethnicity are likely to indicate diverse genes compared to cues that indicate a face belongs to a single particular culture or population

    Plants used by chimpanzees and humans in Cantanhez, Guinea-Bissau. Field guide

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    This is the final version. Available from LAE/CRIA via the link in this recordThe Portuguese version of this field guide is available in ORE: http://hdl.handle.net/10871/121034FC

    Plants used by chimpanzees and humans in Cantanhez, Guinea-Bissau. Field guide

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    This is the final version. Available from LAE/CRIA via the link in this recordThe Portuguese version of this field guide is available in ORE: http://hdl.handle.net/10871/121034FC

    The respiratory pressure-abdominal volume curve in a porcine model

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    Background: Increasing intra-abdominal volume (IAV) can lead to intra-abdominal hypertension (IAH) or abdominal compartment syndrome. Both are associated with raised morbidity and mortality. IAH can increase airway pressures and impair ventilation. The relationship between increasing IAV and airway pressures is not known. We therefore assessed the effect of increasing IAV on airway and intra-abdominal pressures (IAP). Methods: Seven pigs (41.4 +/−8.5 kg) received standardized anesthesia and mechanical ventilation. A latex balloon inserted in the peritoneal cavity was inflated in 1-L increments until IAP exceeded 40 cmH2O. Peak airway pressure (pPAW), respiratory compliance, and IAP (bladder pressure) were measured. Abdominal compliance was calculated. Different equations were tested that best described the measured pressure-volume curves. Results: An exponential equation best described the measured pressure-volume curves. Raising IAV increased pPAW and IAP in an exponential manner. Increases in IAP were associated with parallel increases in pPAW with an approximate 40% transmission of IAP to pPAW. The higher the IAP, the greater IAV effected pPAW and IAP. Conclusions: The exponential nature of the effect of IAV on pPAW and IAP implies that, in the presence of high grades of IAH, small reductions in IAV can lead to significant reductions in airway and abdominal pressures. Conversely, in the presence of normal IAP levels, large increases in IAV may not affect airway and abdominal pressures

    A comparison of climate change impacts on park values on four Queensland World Heritage National Parks in Australia

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    Protected areas will vary in how they respond to climate-related threats and impacts. An important step in adapting protected area management to respond to climate change is identifying how protected areas and their values may be impacted. This requires an understanding of the ecological and social system impacting on the particular values so that consideration of management options and issues can be informed by this understanding. A set of Bayesian belief networks were developed to assess impacts and management issues for three key values (stream-dwelling frogs, cool temperate forest and recreational walking access) across four National Parks (Springbrook, Lamington, Mount Barney and Main Range) in Queensland, Australia. The aim was to assess how those values may be impacted by climate change, how the parks differ in relation to likely impact and options for management adaptation. We observed, depending on a protected area's physical and socio-ecological characteristics, that the values were likely to be differently affected across the parks and management responses will need to take account of these differences

    A global analysis of management capacity and ecological outcomes in terrestrial protected areas

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    Protecting important sites is a key strategy for halting the loss of biodiversity. However, our understanding of the relationship between management inputs and biodiversity outcomes in protected areas (PAs) remains weak. Here, we examine biodiversity outcomes using species population trends in PAs derived from the Living Planet Database in relation to management data derived from the Management Effectiveness Tracking Tool (METT) database for 217 population time‐series from 73 PAs. We found a positive relationship between our METT‐based scores for Capacity and Resources and changes in vertebrate abundance, consistent with the hypothesis that PAs require adequate resourcing to halt biodiversity loss. Additionally, PA age was negatively correlated with trends for the mammal subsets and PA size negatively correlated with population trends in the global subset. Our study highlights the paucity of appropriate data for rigorous testing of the role of management in maintaining species populations across multiple sites, and describes ways to improve our understanding of PA performance

    An assessment of threats to terrestrial protected areas

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    Protected areas (PAs) represent a cornerstone of efforts to safeguard biodiversity, and if effective should reduce threats to biodiversity. We present the most comprehensive assessment of threats to terrestrial PAs, based on in-situ data from 1,961 PAs across 149 countries, assessed by PA managers and local stakeholders. Unsustainable hunting was the most commonly reported threat and occurred in 61% of all PAs, followed by disturbance from recreational activities occurring in 55%, and natural system modifications from fire or its suppression in 49%. The number of reported threats was lower in PAs with greater remoteness, higher control of corruption and lower human development scores. The main reported threats in developing countries were linked to overexploitation for resource extraction, while negative impacts from recreational activities dominated in developed countries. Our results show that many of the most serious threats to PAs are difficult to monitor with remote sensing, and highlight the importance of in situ threat data to inform the implementation of more effective biodiversity conservation in the global protected area estate

    A global analysis of management capacity and ecological outcomes in terrestrial protected areas

    Get PDF
    Protecting important sites is a key strategy for halting the loss of biodiversity. However, our understanding of the relationship between management inputs and biodiversity outcomes in protected areas (PAs) remains weak. Here, we examine biodiversity outcomes using species population trends in PAs derived from the Living Planet Database in relation to management data derived from the Management Effectiveness Tracking Tool (METT) database for 217 population time-series from 73 PAs. We found a positive relationship between our METT-based scores for Capacity and Resources and changes in vertebrate abundance, consistent with the hypothesis that PAs require adequate resourcing to halt biodiversity loss. Additionally, PA age was negatively correlated with trends for the mammal subsets and PA size negatively correlated with population trends in the global subset. Our study highlights the paucity of appropriate data for rigorous testing of the role of management in maintaining species populations across multiple sites, and describes ways to improve our understanding of PA performance

    Plantas usadas por chimpanzés e humanos no Cantanhez, Guiné-Bissau. Guia de campo

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    This is the final version. Available from LAE/CRIA via the link in this recordThe English version of this field guide is available in ORE at: http://hdl.handle.net/10871/121033FC

    Plantas usadas por chimpanzés e humanos no Cantanhez, Guiné-Bissau. Guia de campo

    Get PDF
    This is the final version. Available from LAE/CRIA via the link in this recordThe English version of this field guide is available in ORE at: http://hdl.handle.net/10871/121033FC
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