1,069 research outputs found

    Dynamics of Fisheries in the Azores Islands: A Network Analysis Approach

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    In the context of the global seafood industry, the Azores archipelago (Portugal) plays a pivotal role due to its vast maritime domain. This study employs complex network analysis techniques to investigate the dynamics of Azores fisheries, using time series data converted into networks. We uncover associations between Tunas and specific islands, consistent links among fish classifications, and identify other pivotal nodes within the fishing network. Remarkably, nodes with high degrees and a local clustering coefficient of one provide crucial insights into the fishing ecosystem. This study highlights the value of network analysis for understanding fisheries complexities and offers insights into sustainable management and the preservation of marine ecosystems. It also emphasizes the urgency for ongoing research and data collection to enrich our understanding of this multifaceted domain

    Primeiro registo do tubarão-anão, Squaliolus laticaudus (Smith & Radcliffe, 1912) nos Açores, estendendo a sua distribuição ocidental no Atlântico Nordeste

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    A presente nota documenta a primeira observação do tubarão-anão, Squaliolus laticaudus (Smith & Radcliffe, 1912), nos Açores, estendendo a sua distribuição ocidental no Atlântico Nordeste até ao arquipélago. A ocorrência da espécie nos arquipélagos macaronésicos é igualmente discutida.ABSTRACT: This paper reports the first observation of the spined pygmy shark, Squaliolus laticaudus, from the Azores, extending its westernmost distribution in the North-eastern Atlantic as far as this archipelago. The occurrence of this species in the Macaronesian archipelagos is also discussed

    Space of memory and representation: Bouça da Cova da Moura (Ardegães, Maia, Northwest of Portugal): a case study

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    Bouça da Cova da Moura is the local place-name attributed to a stretch of a plateau overlooking the Leça valley. Here, Neolithic burial mounds share their landscape setting with scatters of archaeological materials that include Bell Beaker fragments, idols and metalwork. Since these are mostly surface findings, their contexts have not yet been accurately determined. Another significant feature is the presence of prehistoric rock carvings. The plateau may thus be considered a public space, conceptually and physically built over time. Its significance and meanings were certainly created and transmitted through practices of memory construction which are representative of cultural identity and social cohesion.Le site de Bouça da Cova da Moura se trouve sur un plateau faisant face au Rio Leça. On y a identifié des tertres funéraires du Néolithique, auxquels sont associés des zones de concentration d’artefacts, incluant céramiques campaniformes, idoles et mobilier métallique. S’agissant de mobilier de surface, le contexte de ces différentes concentrations n’a pas été déterminé avec attention. Un autre fait significatif est l’apparition de gravures rupestres préhistoriques. On peut considérer le plateau comme un espace publique, qui s’est bâti physiquement et conceptuellement au cours des temps. Son importance et sa signification ont certainement été créées et transmises à travers un certain nombre de pratiques de construction mémorielle, représentatives de l’identité culturelle et de la cohésion sociale.info:eu-repo/semantics/publishedVersio

    Space of memory and representation : Bouça da Cova da Moura (Ardegães, Maia, Northwest of Portugal)

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    Bouça da Cova da Moura is the local place-name attributed to a stretch of a plateau overlooking the Leça valley. Here, Neolithic burial mounds share their landscape setting with scatters of archaeological materials that include Bell Beaker fragments, idols and metalwork. Since these are mostly surface findings, their contexts have not yet been accurately determined. Another significant feature is the presence of prehistoric rock carvings. The plateau may thus be considered a public space, conceptually and physically built over time. Its significance and meanings were certainly created and transmitted through practices of memory construction which are representative of cultural identity and social cohesion.Le site de Bouça da Cova da Moura se trouve sur un plateau faisant face au Rio Leça. On y a identifié des tertres funéraires du Néolithique, auxquels sont associés des zones de concentration d’artefacts, incluant céramiques campaniformes, idoles et mobilier métallique. S’agissant de mobilier de surface, le contexte de ces différentes concentrations n’a pas été déterminé avec attention. Un autre fait significatif est l’apparition de gravures rupestres préhistoriques. On peut considérer le plateau comme un espace publique, qui s’est bâti physiquement et conceptuellement au cours des temps. Son importance et sa signification ont certainement été créées et transmises à travers un certain nombre de pratiques de construction mémorielle, représentatives de l’identité culturelle et de la cohésion sociale

    The rock carvings of Bouça da Cova da Moura (Ardegães, Maia, Northern Portugal) in the context of Late Prehistory in the Leça basin

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    Este texto pretende dar a conhecer o conjunto de gravuras rupestres da Bouça da Cova da Moura. A análise efetuada ao conjunto de signos permitiu denotar, a presença de composições gráficas pertencentes à tradição artística que se convencionou denominar de arte atlântica, representações de cariz mais esquemático e motivos de época histórica. Na envolvência dos afloramentos gravados descobriram-se monumentos megalíticos, áreas de dispersão de materiais cerâmicos datáveis do Calcolítico, uma ocupação da Idade do Bronze, além de materiais dispersos deste período genérico, relevantes para a análise da biografia deste lugar numa pequena escala de análise. A inserção deste locus numa escala mais ampla de análise, ou seja, os Montes do Leandro, pequeno contraforte da serra do Bougado, permite admitir que este complexo de gravuras rupestres faria parte de um vasto território de ampla significação simbólica durante a Pré-história Recente. Neste sentido as diferentes materialidades seriam, resultado de um processo aditivo que resulta da frequência do planalto, da sua da reutilização e reinterpretação, num templo cíclico.The aim of this paper is to offer an overview of the rock art assemblage at Bouça da Cova da Moura in its local and regional contexts. The site is located in Ardegães, parish of Águas Santas, municipality of Maia, district of Porto, in north-western Portugal. Fieldwork carried out in the end of the 20th century and the beginning of the 21st century, resulted in the discovery of new carved surfaces in the place where the well-known ‘pedra partida de Ardegães’ had been found; it was not only possible to unveil aspects related to its topographical context but also to discover other materialities which are spatially related to the rock carvings. Stylistic analysis undertaken to the set of carvings allow us to consider that we are beyond an assemblage which is partly constituted of rock art compositions belonging to the prehistoric art tradition conventionally called atlantic art, there is one schematic human figure and other motifs that belong to historical periods. In the vicinities of the carved outcrops there are megalithic monuments dated to the Neolithic, scatters of pottery fragments probably dated to the Copper Age, evidence for a Bronze Age occupation site, as well as clusters of surface finds from the same period. Overall, the field data recovered so far is extremely relevant for the analysis of the biography of this place at a small scale of analysis. The integration of this locus in a wider spatial scale, i.e. in the plateau that cuts across the territory in the north-south direction linking it to the Bougado hills, allow us to admit that this rock art complex would be part of a vast territory of symbolic significance in Late Prehistory. Thus, the distinct archaeological remains may be the materialisation of the importance of this geomorphological unit in the cognitive map and ideological universe of the prehistoric communities who dwelled, over a long period of time, along the middle basin of the River Neiva. These different materialities would result from a process of addition in the occupation of the plateau, of its reuse and reinterpretation in a cyclical time.Este texto insere-se no projeto Bronze Age Landscapes in the west of Iberian Peninsula / Paisagens da Idade do Bronze no ocidente peninsular (SFRH/BSAB/ 986/10) apoiado e financiado pela FCT no âmbito de uma Bolsa de Licença Sabática.info:eu-repo/semantics/publishedVersio

    Clustering of risk factors for chronic diseases among adolescents from Southern Brazil

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    AbstractObjectiveTo investigate the clustering of risk behaviors for chronic non-communicable diseases and their associated factors among adolescents from Southern Brazil.MethodsIn 2008, a survey was conducted with 3990 adolescents aged 14–15years (mean: 14.3; SD: 0.6) from the 1993 Pelotas Birth Cohort Study. Clustering was determined by comparing observed (O) and expected (E) prevalence of all possible combinations of the four risk factors investigated (smoking, alcohol intake, low fruit intake, and physical inactivity). We carried out Poisson regression to evaluate the effect of individual characteristics on the presence of at least three risk behaviors.ResultsAll risk factors tended to cluster together (O/E prevalence=3.0), especially smoking and alcohol intake (odds ratio to present on behavior in the presence of other >5.0). Approximately 15% of adolescents displayed three or more risk behaviors. Females (adjusted OR=1.55), people 15years and older (OR=1.47), with black skin color (OR=1.23), and of low socioeconomic level (OR=1.29) were more likely to display three or more risk factors.ConclusionThese findings suggest that lifestyle-related risk factors tend to cluster among adolescents. Identifying subgroups at greater risk of simultaneously engaging in multiple risk behaviors may aid in the planning of preventive strategies

    Annotated list of fishes caught by the R/V ARQUIPÉLAGO off the Cape Verde archipelago.

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    A prospective survey was carried out in October - November of 2000, in the Cape Verde archipelago, by the R/V ARQUIPÉLAGO. The main objective was to determine the species composition and relative abundance of the demersal fish resources living in the waters of the Cape Verde archipelago. A list of fishes caught with bottom longline during the survey is presented in this document, along with information about the area, depth limits and the relative abundance of the species in the catches. Ninety-seven different species from 49 families were identified from 20 long-line sets. To our knowledge, the following 12 species were recorded for the first time from the waters of Cape Verde islands: Etmopterus princeps, Etmopterus pusillus, Gymnothorax maderensis, Myroconger compressus, Laemonema robustum, Beryx splendens, Scorpaena elongata, Serranus atricauda, Taractes rubescens, Taracthichthys longipinnis, Pagrus africanus and Cathidermis sufflamen. The species Laemonema robustum, were new to the CLOFETA area

    Chemerin receptor blockade improves vascular function in diabetic obese mice via redox-sensitive- and Akt-dependent pathways

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    Chemerin and its G protein-coupled receptor [chemerin receptor 23 (ChemR23)] have been associated with endothelial dysfunction, inflammation, and insulin resistance. However, the role of chemerin on insulin signaling in the vasculature is still unknown. We aimed to determine whether chemerin reduces vascular insulin signaling and whether there is interplay between chemerin/ChemR23, insulin resistance, and vascular complications associated with type 2 diabetes (T2D). Molecular and vascular mechanisms were probed in mesenteric arteries and cultured vascular smooth muscle cells (VSMCs) from C57BL/6J, nondiabetic lean db/m, and diabetic obese db/db mice as well as in human microvascular endothelial cells (HMECs). Chemerin decreased insulin-induced vasodilatation in C57BL/6J mice, an effect prevented by CCX832 (ChemR23 antagonist) treatment. In VSMCs, chemerin, via oxidative stress- and ChemR23-dependent mechanisms, decreased insulin-induced Akt phosphorylation, glucose transporter 4 translocation to the membrane, and glucose uptake. In HMECs, chemerin decreased insulin-activated nitric oxide signaling. AMP-activated protein kinase phosphorylation was reduced by chemerin in both HMECs and VSMCs. CCX832 treatment of db/db mice decreased body weight, insulin, and glucose levels as well as vascular oxidative stress. CCX832 also partially restored vascular insulin responses in db/db and high-fat diet-fed mice. Our novel in vivo findings highlight chemerin/ChemR23 as a promising therapeutic target to limit insulin resistance and vascular complications associated with obesity-related diabetes

    Stingless Bees Fed on Fermented Soybean-extract-based Diet Had Reduced Lifespan than Pollen-Fed Workers

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    Nectar and pollen are the basic food resources of stingless bees. The current advance of meliponiculture led to the search for supplementary feeding. Despite little is known about native bee supplementation, several alternative foods have been tested as protein substitutes, with soy being one of the most commonly used. In this study, we compared the effect of a semiartificial soy-based diet versus a natural diet on the longevity of adult worker of Melipona flavolineata Friese and Scaptotrigona aff. postica (Latreille). A total of 200 workers of each species (40 from each colony) were used, of which 100 comprised the control group (consumed honey and pollen) and 100 the experimental group (honey and a semiartificial food based on soybean extract). The workers were divided into groups of 20 individuals confined in MDF boxes not completely enclosed, without a queen, and kept in BOD incubators. Dead bees were counted and removed daily. Kaplan-Meier survival curves were plotted for each species. We found greater longevity in workers who consumed only natural pollen (71 days for M. flavolineata, 78 days for S. aff. postica, in average) compared to those consuming the soy-based diet (62 days for M. flavolineata, 61 days for S. aff. postica, in average). Workers of M. flavolineata that consumed pollen lived nine days more (21.8%) than those fed on the soy-based diet, while S. aff. postica workers lived seven days more (12.7%). As longevity was only slightly reduced, we can recommend a soy-based diet for stingless bees during dearth periods or for supplemental feeding of newly formed colonies

    What is the effect of size on the use of the EFQM excellence model?

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    Purpose By contrasting a contingency with a universal approach to business excellence models (BEMs), the purpose of this paper is to investigate the effect of size on the use of the European Foundation for Quality Management (EFQM) model by organizations that were officially “Recognized for Excellence” in Spain. It considers the potential differences between large organizations and SMEs on the level of adoption of EFQM criteria and on the impact that enablers-criteria may have on key performance measures. Design/methodology/approach This study uses actual sub-criteria and criteria scores attained by organizations in their assessment for EFQM recognition. Scores of a population of 216 organizations are analyzed via analysis of variance, factor and structural equations models. Findings Although there are some criteria in the EFQM model that appear to be universally adopted irrespective of size, the empirical analyses indicate that size may shape the adoption of other criteria and the impact that enablers can have on results, thus supporting a contingency perspective. Moreover, the findings call for the revision of the relationships embedded in the EFQM model. Originality/value In contrast to most previous research, which relied on surveys of managers’ perceptions, this study uses the actual scores achieved by organizations in their assessment for EFQM recognition. It addresses the effect of size on the whole model, which so far has been neglected in the literature. All in all this study contributes to the literature on contingency approaches to best practices, and more specifically to BEMs. To the practitioner, it provides guidelines for addressing perceived performance gaps in their pursuit of recognition for excellence
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