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SYNOPSIS. Interspecific comparisons have played a prominent role in evolutionary biology at least since the time of Charles Darwin. Since 1985, the "comparative method" has been revitalized by new analytical techniques that use phylogenetic information and by increased availability of phytogenies (often from molecular data sets). Because species descend(More)
We assessed the relative importance of environmental variation, interspecific competition for space, and predator abundance on assemblage structure and microhabitat use in a stream fish assemblage inhabiting Coweeta Creek, North Carolina, USA. Our study encompassed a lO-yr time span (1983-1992) and included some of the highest and lowest flows in the last(More)
A B S TRA C T A rich variety of mechanisms govern the inactivation of the rod phototransduc-tion cascade. These include rhodopsin phosphorylation and subsequent binding of arrestin; modulation of rhodopsin kinase by S-modulin (recoverin); regulation of G-protein and phos-phodiesterase inactivation by GTPase-activating factors; and modulation of guanylyl(More)
About the RCPSC Our Vision: The best health for Canadians and leadership in specialty medicine PURPOSE: The Royal College of Physicians and Surgeons of Canada (RCPSC), established by a Special Act of Parliament in 1929, is a national, private, non-profit organization of 39,000 medical specialists in 92 countries dedicated to ensuring the highest standards(More)
Scotland 2015, 'Genetic contributions to variation in general cognitive function: a meta-analysis of genome-wide association studies in the CHARGE consortium (N=53 949)' Molecular Psychiatry, vol 20, no. 2, pp. General rights Copyright for the publications made accessible via the Edinburgh Research Explorer is retained by the author(s) and / or other(More)
The proximal mechanisms determining social dominance are not well understood. We used the highly territorial lizard A. cristatellus to test two main hypotheses: (1) that male social dominance is associated with locomotor abilities; (2) that locomotor abilities (maximal performance), as measured in the laboratory, are correlated with behaviour in the field.(More)
and F intersterility groups were subjected to isozyme analysis. European S, P, and F groups had more variability than the North American S and P groups in expected hterozygosity, number of alleles per locus, and percent polymorphic loci. In contrast with the North American S and P groups, the European intersterility groups could not be distinguished from(More)
This paper addresses the problem of obtaining numerically maximum-likelihood estimates of the parameters for a mixture of normal distributions. In recent literature, a certain successive-approximations procedure, based on the likelihood equations, was shown empirically to be effective in numerically approximating such maximum-likelihood estimates; however,(More)
We used strong inference with Akaike's Information Criterion (AIC) to assess the processes capable of explaining long-term (1984-1995) variation in the per capita rate of change of mottled sculpin (Cottus bairdi) populations in the Coweeta Creek drainage (USA). We sampled two fourth-and one fifth-order sites (BCA [uppermost], BCB, and CC [lowermost]) along(More)
We define a four-state Potts model ensemble on the square lattice, with the constraints that neighboring spins must have different values, and that no plaquette may contain all four states. The spin configurations may be mapped into those of a 2-dimensional interface in a 2+5 dimensional space. If this interface is in a Gaussian rough phase (as is the case(More)