Search Results - "Lougheed, SC"

An exploratory spatial contaminant assessment for polar bear (Ursus maritimus) liver, fat, and muscle from northern Canada by Boutet, V, Dominique, M, Eccles, KM, Branigan, M, Dyck, M, van Coeverden de Groot, P, Lougheed, SC, Rutter, A, Langlois, VS

“…Since the industrial era, chemicals have been ubiquitous in worldwide ecosystems. Despite the discontinued release of highly toxic persistent organic…”
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Mating signal partitioning in multi-species assemblages: a null model test using frogs by Chek, Andrew A., Bogart, James P., Lougheed, Stephen C.

“…Competitive partitioning of ‘community’ signal space has long been suggested to underlie diversification of mating signals. Selection or competitive exclusion…”
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Riverine Barriers and the Geographic Distribution of Amazonian Species by Gascon, C, Malcolm, J R, Patton, J L, da Silva, M N, Bogart, J P, Lougheed, S C, Peres, C A, Neckel, S, Boag, P T

“…Rivers have been suggested to have played an important role in shaping present-day patterns of ecological and genetic variation among Amazonian species and…”
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Discordant temporal and geographic patterns in maternal lineages of eastern north American frogs, Rana catesbeiana (Ranidae) and Pseudacris crucifer (Hylidae) by Austin, James D, Lougheed, Stephen C, Boag, Peter T

“…Whether the Pleistocene has had a disproportionate impact on the recent diversification of temperate species, or played a lesser role in a more protracted…”
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Controlling for the Effects of History and Nonequilibrium Conditions in Gene Flow Estimates in Northern Bullfrog (Rana catesbeiana) Populations by Austin, James D, Lougheed, Stephen C, Boag, Peter T

“…Nonequilibrium conditions due to either allopatry followed by secondary contact or recent range expansion can confound measurements of gene flow among…”
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Molecular evolution of cytochrome c oxidase in high-performance fish (teleostei: Scombroidei) by Dalziel, Anne C, Moyes, Christopher D, Fredriksson, Emma, Lougheed, Stephen C

“…The 13 peptides encoded by vertebrate mitochondrial DNA (mtDNA) are essential subunits of oxidative phosphorylation (OXPHOS) enzymes. These genes normally…”
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Cryptic lineages in a small frog: the post-glacial history of the spring peeper, Pseudacris crucifer (Anura: Hylidae) by Austin, James D., Lougheed, Stephen C., Neidrauer, Lindsay, Chek, Andrew A., Boag, Peter T.

“…The spring peeper ( Pseudacris crucifer) is believed to have been a primary herpetological invader of eastern North America following the most recent period of…”
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Genetic evidence for female-biased dispersal in the bullfrog, Rana catesbeiana (Ranidae) by Austin, James D., Dávila, José A., Lougheed, Stephen C., Boag, Peter T.

“…Sex‐biased dispersal is an important but unexplored area of amphibian ecology. We predicted female‐biased dispersal in the bullfrog (Rana catesbeiana) based on…”
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Molecular phylogenetics and diversification of the genus Sporophila (Aves: Passeriformes) by Lijtmaer, Darío A., Sharpe, Nadine M.M., Tubaro, Pablo L., Lougheed, Stephen C.

“…The evolutionary affinities within and among many groups of nine-primaried oscines remain unresolved. One such group is Sporophila, a large genus of New World…”
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Ridges and rivers: a test of competing hypotheses of Amazonian diversification using a dart-poison frog (Epipedobates femoralis) by Lougheed, S. C., Gascon, C., Jones, D. A., Bogart, J. P., Boag, P. T.

“…were used to test two hypotheses of Amazonian diversification: the riverine barrier and the ridge hypotheses. Samples were derived from sites located on both…”
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Multi-character perspectives on the evolution of intraspecific differentiation in a neotropical hylid frog by Lougheed, Stephen C, Austin, James D, Bogart, James P, Boag, Peter T, Chek, Andrew A

“…Multi-character empirical studies are important contributions to our understanding of the process of speciation. The relatively conserved morphology of, and…”
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Measurement Error and Morphometric Studies: Statistical Power and Observer Experience by Yezerinac, Stephen M., Lougheed, Stephen C., Handford, Paul

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Phylogenetics, zoogeography, and the role of dispersal and vicariance in the evolution of the Rana catesbeiana (Anura: Ranidae) species group by AUSTIN, JAMES D., LOUGHEED, STEPHEN C., MOLER, PAUL E., BOAG, PETER T.

“…The Rana catesbeiana species group consists of seven species, each variously distributed across eastern North America. We estimated the evolutionary…”
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Patterns of Genetic Population Differentiation in Four Species of Amazonian Frogs: A Test of the Riverine Barrier Hypothesis by Gascon, Claude, Lougheed, Stephen C., Bogart, James P.

“…Patterns and levels of allozyme variation among populations of Amazonian frogs were used to test the riverine barrier hypothesis of species differentiation…”
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A Molecular Phylogeny of Warbling-Finches (Poospiza): Paraphyly in a Neotropical Emberizid Genus by Lougheed, Stephen C., Freeland, Joanna R., Handford, Paul, Boag, Peter T.

“…We investigated the phylogenetic relationships of 12 species within a single genus of neotropical passerine (Poospiza) using 849 bp (283 codons) of the…”
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CRYPTIC DICHROMATISM AND SEASONAL COLOR VARIATION IN THE DIADEMED TANAGER by Tubaro, Pablo L, Lijtmaer, Dario A, Lougheed, Stephen C

“…We studied the patterns of sexual dichromatism and seasonal variation in plumage color in the Diademed Tanager (Stephanophorus diadematus), a species…”
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Perception and History: Molecular Phylogeny of a Diverse Group of Neotropical Frogs, the 30-Chromosome Hyla (Anura: Hylidae) by Chek, A.A., Lougheed, S.C., Bogart, J.P., Boag, P.T.

“…We used 16S rRNA, 12S rRNA, and cytochrome-b sequence to investigate the history of the “30-chromosome” Hyla, a diverse assemblage of neotropical treefrogs…”
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Why is there a tropical-temperate disparity in the genetic diversity and taxonomy of species? by Chek, A A, Austin, J D, Lougheed, S C

“…Studies over the last few decades have suggested that neotropical vertebrate taxa may have greater genetic disparity than their nearctic counterparts. Here, a…”
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THE IMPORTANCE OF COVER ROCK IN NORTHERN POPULATIONS OF THE FIVE-LINED SKINK (EUMECES FASCIATUS) by Howes, B. J., Lougheed, S. C.

“…Although broad habitat preferences are known for many species of conservation concern, identification of key microhabitat elements critical to persistence and…”
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Hierarchical Patterns of Genetic Population Structure in Black Rat Snakes (Elaphe obsoleta obsoleta) as Revealed by Microsatellite DNA Analysis by Lougheed, Stephen C., Gibbs, H. Lisle, Prior, Kent A., Weatherhead, Patrick J.

“…We investigated the distribution of variation at six microsatellite loci in the black rat snake (Elaphe obsoleta obsoleta). Sampling occurred at three…”
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