Approximately two decades after the first pioneering analyses, the study of shape asymmetry
with the methods of geometric morphometrics has matured and is a burgeoning field. New …

Cichlid fishes are hypothesized to encompass several independent adaptive radiations that
display increased diversification rates and impressive ecological heterogeneity. Here, I …

There is strong negative-assortative mating for gray and black pelage color in the iconic
wolves in Yellowstone National Park. This is the first documented case of significant …

The colonization of new adaptive zones is widely recognized as one of the hallmarks of
adaptive radiation. However, the adoption of novel resources during this process is rarely …

The effect of the environment on fitness in natural populations is a fundamental question in
evolutionary biology. However, experimental manipulations of both environment and …

Nonrandom mating based on phenotype has been observed in a number of organisms, but
a very high proportion of these examples are of assortative mating. The strongest example of …

Abstract Lateralized behavior (“handedness”) is unusual, but consistently found across
diverse animal lineages, including humans. It is thought to reflect brain anatomical and/or …

The scale-eating cichlid Perissodus microlepis with asymmetric mouth is an attractive model
of behavioral laterality: each adult tears off scales from prey fishes' left or right flanks …

How polymorphisms consisting in left–right asymmetries are produced and maintained in
natural populations is a tantalizing question, which remains largely unanswered. The scale …

Neotropical cichlids include over 550 species from Central and South America and the
Caribbean and are increasingly recognized as models for studying evolutionary …