370 research outputs found

    Pélécypodes du Montien de Belgique

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    Percepção de empresários sobre o tema da inovação

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    A inovação pode ser vista como uma das possibilidades existentes para que as organizações possam superar desafios e se tornarem mais competitivas, empreendendo e gerando novas alternativas para superar as adversidades provocadas pela crise, tal qual a COVID-19. Nesse contexto, este trabalho em por objetivo verificar a percepção dos empresários da cidade de Medianeira (PR) sobre o tema de inovação em tempos pandêmicos. Em forma de exercício metodológico, esse texto, com apropriação qualitativa, apresenta inserção no campo por meio de entrevistas, cujos dados geraram categorias e unidades de significados. Dentre os resultados obtidos, destacaram-se a capacidade dos colaboradores em inovar, a resiliência, a criatividade e a comunicação de maneira assertiva

    The family Carditidae (Bivalvia) in the early Danian of Patagonia (Argentina)

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    The first systematic analysis of the Danian carditids of Patagonia is presented, which includes four genera—one new genus and the first records of three other genera in South America. They consist of Claibornicardia paleopatagonica (Ihering, 1903), a widely distributed species occuring in the Jagüel, Roca and Salamanca formations (Neuquén, Río Negro and Chubut Provinces); Rotundicardia Heaslip, 1968, represented by the new species R. mariobrosorum n. sp., which is restricted to the Roca Formation (Río Negro Province); Cardites feruglioi (Petersen, 1846) (Roca and Lefipán formations, Río Negro and Chubut Provinces); and by Kalelia new genus, which includes K. burmeisteri (Böhm, 1903) from the Salamanca and Roca formations (Río Negro and Chubut Provinces), which is related to the Paris Basin species K. multicostata (Lamarck, 1806) n. comb. and K. pectuncularis (Lamarck, 1806) n. comb. ‘Venericardia’ iheringi (Böhm, 1903), a species known only from internal molds, is described and regarded as a carditid with uncertain affinities. The presence of Claibornicardia, Rotundicardia, and Cardites in Patagonia constitutes the most ancient record of these genera and confirms biogeographical connections previously established between the Danian Argentinian and North American/European fossil faunas.Fil: Perez, Damián. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales ; ArgentinaFil: del Río, Claudia Julia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales ; Argentin

    Upper Toarcian (Lower Jurassic) marine gastropods from the Cleveland Basin, England: systematics, palaeobiogeography and contribution to biotic recovery from the early Toarcian extinction event

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    Here we describe a new upper Toarcian (Lower Jurassic) marine gastropod fauna from rocks of the Cleveland Basin exposed on the North Yorkshire coast of England. The fossil assemblage consists of 16 species, of which three are new: Katosira ? bicarinata sp. nov., Turritelloidea stepheni sp. nov. and Striactaenonina elegans sp. nov. Four species are described in open nomenclature as Tricarilda ? sp., Jurilda sp., Cylindrobullina sp. and Cossmannina sp. The other species have previously been described: Coelodiscus minutus (Schübler in Zieten), Procerithium quadrilineatum (Römer), Pseudokatosira undulata (Benz in von Zieten), Palaeorissoina aff. acuminata (Gründel), Pietteia unicarinata (Hudleston), Globularia cf. canina (Hudleston), Striactaeonina cf. richterorum Schulbert & Nützel, Striactaenonina aff. tenuistriata (Hudleston) and Sulcoactaeon sedgvici (Phillips). Most of these species are the earliest records of their respective genera and show palaeobiogeographical connections with contemporary gastropod associations from other regions of Europe and South America. The taxonomic composition of the upper Toarcian Cleveland Basin gastropod assemblage differs substantially from the faunas of the upper Pliensbachian and lower Toarcian Tenuicostatum Zone, showing the strong effect of the early Toarcian mass extinction event on the marine gastropod communities in the basin. Only a few gastropod species are shared between the late Toarcian faunas and the much more diverse Aalenian gastropod faunas in the Cleveland Basin, suggesting that there was a facies control on gastropod occurrences at that time. This is also a potential explanation for the taxonomic differences between the late Toarcian gastropod faunas in the Cleveland Basin and those in France, and northern and southern Germany

    A review of the ecology, palaeontology and distribution of atlantid heteropods (Caenogastropoda: Pterotracheoidea: Atlantidae)

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    Fewer than 1% of marine gastropod species live a holoplanktic life. Of these, the shelled heteropods of the family Atlantidae are among the most poorly understood. The atlantids potentially make up an important part of the ocean zooplankton, composing up to 69% of shelled holoplanktic gastropods in the Late Pleistocene to Recent fossil record. They are also likely to be at high risk from current and future global changes, including anthropogenic ocean acidification. However, due to their small size (<12 mm), difficulty of sampling and complicated morphology, we still lack key information about atlantid taxonomy and ecology. This makes it difficult to understand how important they are in the ocean foodweb and how they will be affected by environmental change. Although many studies have been carried out on the atlantids, these have generally been broad and unconnected. Here, we draw together this previous research, summarizing what is currently known about atlantid taxonomy, palaeontology, ecology and biogeography, and aiming to provide a foundation for future research on this group. The data indicate complex behaviours involving seasonal and vertical migration, and demonstrate extended geographical ranges, with implications for understanding the role of atlantids in the ocean foodweb and their sensitivity to environmental changes. This review highlights the urgent need for further taxonomic research on the atlantids, including molecular analysis, and for improved sampling techniques

    Migrant healthcare workers during COVID-19: bringing an intersectional health system-related approach into pandemic protection. A German case study

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    IntroductionMigrant healthcare workers played an important role during the COVID-19 pandemic, but data are lacking especially for high-resourced European healthcare systems. This study aims to research migrant healthcare workers through an intersectional health system-related approach, using Germany as a case study.MethodsAn intersectional research framework was created and a rapid scoping study performed. Secondary analysis of selected items taken from two COVID-19 surveys was undertaken to compare perceptions of national and foreign-born healthcare workers, using descriptive statistics.ResultsAvailable research is focused on worst-case pandemic scenarios of Brazil and the United Kingdom, highlighting racialised discrimination and higher risks of migrant healthcare workers. The German data did not reveal significant differences between national-born and foreign-born healthcare workers for items related to health status including SARS-CoV-2 infection and vaccination, and perception of infection risk, protective workplace measures, and government measures, but items related to social participation and work conditions with higher infection risk indicate a higher burden of migrant healthcare workers.ConclusionsCOVID-19 pandemic policy must include migrant healthcare workers, but simply adding the migration status is not enough. We introduce an intersectional health systems-related approach to understand how pandemic policies create social inequalities and how the protection of migrant healthcare workers may be improved

    Differentiation of high-latitude and polar marine faunas in a greenhouse world

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    Aim The aim was to investigate those factors that influenced the differentiation of high-latitude and polar marine faunas on both ecological and evolutionary time-scales. Can a focus on a greenhouse world provide some important clues? Location World-wide, but with particular emphasis on the evolution of Antarctic marine faunas. Time period Early Cenozoic era and present day. Major taxa studied Mollusca, especially Neogastropoda. Methods The Early Cenozoic global radiation of one of the largest extant marine clades, Neogastropoda, was examined, and detailed comparisons were made between two tropical localities and Antarctica. High- to low-latitude faunal differentiation was assessed using Sørensen's dissimilarity index, and component species in each of the three faunas were assigned to 29 families and family groups. Relative diversity distributions were fitted to these three faunas and two modern ones to assess the contrast in evenness between high- and low-latitude assemblages. Results By the Middle Eocene, a distinct high-latitude neogastropod fauna had evolved in Antarctica. In addition, the distribution of species within families in this fauna is statistically significantly less even than that in the tropics. Indeed, there is no detectable difference in the scale of this separation from that seen today. Exactly as in the modern fauna, Middle Eocene Antarctic neogastropods are dominated by a small number of trophic generalist groups. Main conclusions As the hyperdiverse Neogastropoda clade radiated globally through the Early Cenozoic, it differentiated into distinct high- and low-latitude components. The fact that it did so in a greenhouse world strongly suggests that something else besides temperature was involved in this process. The predominance of generalist feeding types in the Antarctic fossil faunas is linked to the phenomenon of a seasonally pulsed food supply, exactly as it is today. Seasonality in primary productivity may act as a fundamental control on the evolution of large-scale biodiversity pattern
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