289 research outputs found

    Religious Orders and Growth through Cultural Change in Pre-Industrial England

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    We advance the hypothesis that cultural values such as high work ethic and thrift, “the Protestant ethic” according to Max Weber, may have been diffused long before the Reformation, thereby importantly affecting the pre-industrial growth record. The source of pre-Reformation Protestant ethic, according to the proposed theory, was the Catholic Order of Cistercians. Using county-level data for England we find empirically that the frequency of Cistercian monasteries influenced county-level comparative development until 1801; that is, long after the Dissolution of the Monasteries. The pre-industrial development of England may thus have been propelled by a process of growth through cultural change.Protestant ethic; Malthusian population dynamics; economic development

    Pre-reformation roots of the protestant ethic

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    We hypothesize that cultural appreciation of hard work and thrift, the Protestant ethic according to Max Weber, had a pre-Reformation origin. The proximate source of these values was, according to the proposed theory, the Catholic Order of Cistercians. In support, we first document an impact from the Order on growth within the epicenter of the industrial revolution; English counties that were more exposed to Cistercian monasteries experienced faster productivity growth from the 13th century onwards. Consistent with a cultural influence, this impact is also found after the monasteries were dissolved in the 1530s. Second, we find that the values emphasized by Weber are relatively more pervasive in European regions where Cistercian monasteries were located historically, and that the legacy of the Cistercians can be detected in present-day employment rates across European sub-regions

    Parasite diversity and ecology in a model species, the guppy (Poecilia reticulata) in Trinidad

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    The guppy (Poecilia reticulata) is a model species in ecology and evolution. Many studies have examined effects of predators on guppy behaviour, reproduction, survival strategies, feeding and other life-history traits, but few have studied variation in their parasite diversity. We surveyed parasites of 18 Trinidadian populations of guppy, to provide insight on the geographical mosaic of parasite variability, which may act as a source of natural selection acting on guppies. We found 21 parasite species, including five new records for Trinidad. Spatial variation in parasite diversity was significantly higher than that of piscine predators, and significant variation in parasite richness among individuals and populations was correlated with: (i) host size, (ii) snail species richness, and (iii) the distance between populations. Differences in parasite species richness are likely to play an important, yet underestimated role in the biology of this model species of vertebrate ecology and evolution

    MEGASAT: automated inference of microsatellite genotypes from sequence data

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    MEGASAT is software that enables genotyping of microsatellite loci using next-generation sequencing data. Microsatellites are amplified in large multiplexes, and then sequenced in pooled amplicons. MEGASAT reads sequence files and automatically scores microsatellite genotypes. It uses fuzzy matches to allow for sequencing errors and applies decision rules to account for amplification artefacts, including nontarget amplification products, replication slippage during PCR (amplification stutter) and differential amplification of alleles. An important fea- ture of MEGASAT is the generation of histograms of the length–frequency distributions of amplification products for each locus and each individual. These histograms, analogous to electropherograms traditionally used to score microsatellite genotypes, enable rapid evaluation and editing of automatically scored genotypes. MEGASAT is written in Perl, runs on Windows, Mac OS X and Linux systems, and includes a simple graphical user interface. We demon- strate MEGASAT using data from guppy, Poecilia reticulata. We genotype 1024 guppies at 43 microsatellites per run on an Illumina MiSeq sequencer. We evaluated the accuracy of automatically called genotypes using two methods, based on pedigree and repeat genotyping data, and obtained estimates of mean genotyping error rates of 0.021 and 0.012. In both estimates, three loci accounted for a disproportionate fraction of genotyping errors; conversely, 26 loci were scored with 0–1 detected error (error rate ≤0.007). Our results show that with appropriate selection of loci, automated genotyping of microsatellite loci can be achieved with very high throughput, low genotyping error and very low genotyping costs

    Genomics reveal population structure, evolutionary history, and signatures of selection in the northern bottlenose whale, Hyperoodon ampullatus

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    Funding: This work was supported by Fisheries and Oceans Canada (DFO) Maritimes and National Geographic emerging explorer grant to L.J.F, with support by and Natural Sciences and Engineering Research Council of Canada (NSERC) and Killam Nova Scotia Doctoral Scholarships. Work was also supported by US Office of Naval Research and US Strategic Environmental Research and Development Program (SERDP), DFO, University of Windsor, Crown-Indigenous Relations and Northern Affairs Canada, Nunavut Fisheries Association, Government of Nunavut, and NSERC. Funding and resources for sequencing the northern bottlenose whale genome was supported by the CanSeq150 program of Canada’s Genomics Enterprise.Information on wildlife population structure, demographic history, and adaptations are fundamental to understanding species evolution and informing conservation strategies. To study this ecological context for a cetacean of conservation concern, we conducted the first genomic assessment of the northern bottlenose whale, Hyperoodon ampullatus, using whole-genome resequencing data (n = 37) from five regions across the North Atlantic Ocean. We found a range-wide pattern of isolation-by-distance with a genetic subdivision distinguishing three subgroups: the Scotian Shelf, western North Atlantic, and Jan Mayen regions. Signals of elevated levels of inbreeding in the Endangered Scotian Shelf population indicate this population may be more vulnerable than the other two subgroups. In addition to signatures of inbreeding, evidence of local adaptation in the Scotian Shelf was detected across the genome. We found a long-term decline in effective population size for the species, which poses risks to their genetic diversity and may be exacerbated by the isolating effects of population subdivision. Protecting important habitat and migratory corridors should be prioritized to rebuild population sizes that were diminished by commercial whaling, strengthen gene flow, and ensure animals can move across regions in response to environmental changes.Publisher PDFPeer reviewe

    Genomic evidence of past and future climate-linked loss in a migratory Arctic fish

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    Acknowledgements We thank staff of the Newfoundland DFO Salmonids section, Parks Canada, the Nunatsiavut Government, the NunatuKavut Community Council, the Sivunivut Inuit Community Corporation, the Innu Nation, the Labrador Hunting and Fishing Association and fishers for their support, participation and tissue collections and the staff of the Aquatic Biotechnology Lab at the Bedford Institute of Oceanography for DNA extractions. This study was supported by the Ocean Frontier Institute, a Genomics Research and Development Initiative (GRDI) Grant, a Natural Sciences and Engineering Research Council (NSERC) Discovery Grant and Strategic Project Grant to I.R.B., the Weston Family Award for research at the Torngat Mountains Base Camp and an Atlantic Canada Opportunities Agency and Department of Tourism, Culture, Industry and Innovation grant allocated to the Labrador Institute. Author Correction: Layton, K.K.S., Snelgrove, P.V.R., Dempson, J.B. et al. Author Correction: Genomic evidence of past and future climate-linked loss in a migratory Arctic fish. Nat. Clim. Chang. 11, 551 (2021). https://doi.org/10.1038/s41558-021-01023-8Peer reviewedPostprin

    Prospectus Surveys of Economic Studies

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