• Publications
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Phylogenies and the Comparative Method: A General Approach to Incorporating Phylogenetic Information into the Analysis of Interspecific Data
TLDR
A generalized linear model (GLM) is presented for the analysis of comparative data, which can be used to address questions regarding the relationship between traits or between traits and environments, the rate of phenotypic evolution, the degree of phylogenetic effect, and the ancestral state of a character. Expand
PHYLOGENETIC ANALYSES OF THE CORRELATED EVOLUTION OF CONTINUOUS CHARACTERS: A SIMULATION STUDY
We use computer simulation to compare the statistical properties of several methods that have been proposed for estimating the evolutionary correlation between two continuous traits, and defineExpand
TRANSLATING BETWEEN MICROEVOLUTIONARY PROCESS AND MACROEVOLUTIONARY PATTERNS: THE CORRELATION STRUCTURE OF INTERSPECIFIC DATA
TLDR
It is found that stabilizing selection leads to patterns of exponential decrease of between species covariance with phylogenetic distance, which is different from the usual linear patterns of decrease assumed in most comparative and systematic methods. Expand
PHYLOGENIES, SPATIAL AUTOREGRESSION, AND THE COMPARATIVE METHOD: A COMPUTER SIMULATION TEST
  • E. Martins
  • Biology, Medicine
  • Evolution; international journal of organic…
  • 1 October 1996
TLDR
Brownian motion computer simulation was used to test the statistical properties of a spatial autoregressive method in estimating evolutionary correlations between two traits using interspecific comparative data, showing how diagnostic techniques can be useful in detecting and avoiding such situations, but that such techniques should not be used as definitive evidence that phylogenetic correlation is not present in a set of comparative data. Expand
CONDUCTING PHYLOGENETIC COMPARATIVE STUDIES WHEN THE PHYLOGENY IS NOT KNOWN
  • E. Martins
  • Biology, Medicine
  • Evolution; international journal of organic…
  • 1 February 1996
TLDR
A method is proposed to conduct phylogenetic analyses of comparative or interspecific data when the true phylogeny is not known and the mean of this distribution is proposed as a reasonable estimate of the true evolutionary statistic of interest. Expand
The Phylogenetic Mixed Model
TLDR
The phylogenetic mixed model is particularly rich in terms of the evolutionary insight that might be drawn from model parameters, so the interpretation of the model parameters in a specific comparative analysis is illustrated and discussed. Expand
ADAPTIVE CONSTRAINTS AND THE PHYLOGENETIC COMPARATIVE METHOD: A COMPUTER SIMULATION TEST
TLDR
It was found that correlations estimated without taking phylogeny into account were often quite poor and never substantially better than those produced by the other tested methods, while Felsenstein's independent contrasts (FIC) method gave the best performance in many cases, even when weak constraints had been acting throughout phenotypic evolution. Expand
Behavioral syndromes and the evolution of correlated behavior in zebrafish
TLDR
Evidence of an activity syndrome is found in zebrafish, as if underlying metabolic costs influence variation in multiple forms of behavior, and a relationship between boldness and aggression was also apparent but depended both on strain and which specific behavior patterns were identified as measures of "boldness. Expand
Estimation of ancestral states of continuous characters: A computer simulation study
TLDR
Computer simulation is used to examine the statistical properties of parsimony and linear parsimony methods and to determine how much of an improvement these methods actually provide when applied to realistic data. Expand
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