We report the Eurasian species Agrilus ribesi Schaefer, 1946, for the first time from North America and propose that the damage to currants (Ribes spp.) in Ontario prior to 1940 and ascribed to A. cuprescens were caused by this species. We provide morphological diagnostic characters for A. ribesi and closely related A. cuprescens and we complement this information with DNA barcodes from four al...

10 The complexity of the analysis is indicated by the probability that some tropical North American elements that had presumably colonized South America just prior to or during the establishment of the isthmus, were subsequently exterminated in North America as a result of the Pleistocene climatic deterioration, and recolonized Central America in the later Pleistocene and post-Pleistocene as pa...

New cardiopulmonary bypass devices and new innovative methods are frequently reported in the literature; however, the actual extent to which they are adopted into clinical practice is not well known. We distributed an electronic survey to 289 domestic and international pediatric congenital surgery centers in an effort to measure attributes of current clinical practice. The survey consisted of 1...

M ushroom poisoning of companion animals, particularly dogs, is a potentially underestimated problem in North America. Because of their wandering and scavenging nature, dogs seem particularly prone to mushroom poisoning.1-8 While there have been sporadic reports of mushroom poisoning in dogs in the veterinary literature,1-8 anecdotal experience in the Pacific Northwest suggests it is more preva...

We review the taxonomy and ecology of Chloropidae (Diptera) associated with pitcher plants (Sarraceniaceae) in North America. Tricimba wheeleri Mlynarek sp.n. is described from the pitchers of Sarracenia alata Alph.Wood and S. leucophylla Raf. in the southeastern United States (Alabama, Mississippi). Aphanotrigonum darlingtoniae (Jones) associated with Darlingtonia californica Torr. in northern...

The spread of highly pathogenic avian influenza virus (AIV) (H5N1) underlines the potential for global AIV movement through birds. The phylogenies of AIV genes from avian hosts usually separate into Eurasian and North American clades, reflecting limited bird migration between the hemispheres. However, mounting evidence that some H6 sequences from North America cluster with Eurasian subtype H6 s...

The soybean aphid (Aphis glycinesMatsumura) is an invasive pest of cultivated soybean (Glycine max L.) in North America. After the initial invasion in 2000, the aphid has quickly spread across most of the United States and Canada, suggesting large-scale dispersal and rapid adaptation to newenvironments.Usingmicrosatellitemarkers fromclosely related species,wecompared thegenetic diversity and th...

This paper constructs a general equilibrium overlapping generation model to evaluate quantitatively how a demographic transition (falling mortality and fertility rates) a ects aggregate variables (wages, interest rate, output), and inter-generational welfare in closed and open economy. We perform this analysis for two economies calibrated to resemble to the North (US and Europe) and Latin Ameri...

This paper constructs a general equilibrium overlapping generation model to evaluate quantitatively how a demographic transition (falling mortality and fertility rates) a ects aggregate variables (wages, interest rate, output), and inter-generational welfare in closed and open economy. We perform this analysis for two economies calibrated to resemble to the North (US and Europe) and Latin Ameri...

1 Theoretical Ecosystem Ecology laboratory, Université du Québec à Rimouski, Rimouski, Quebec, Canada, 2 Quebec Center for Biodiversity Science, McGill University, Montreal, Quebec, Canada, 3 Department of Biology, Utah State University, Logan, Utah, United States of America, 4 Ecology, Evolution and Organismic Biology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, U...