Colin R. Hughes

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Brazilian peppertree (Schinus terebinthifolius) is a woody perennial that has invaded much of Florida. This native of northeastern Argentina, Paraguay, and Brazil was brought as an ornamental to both the west and east coasts of Florida at the end of the 19th century. It was recorded as an invader of natural areas in the 1950s, and has since extended its(More)
Many evolutionary studies, particularly kinship studies, have been limited by the availability of segregating genetic marker loci. Microsatellites promise to alleviate these problems. Microsatellite loci are segments of DNA with very short sequence motifs repeated in tandem; their often numerous alleles differ in the number of these repeat units. They are(More)
We characterized the MHC class II B gene in the green-rumped parrotlet, Forpus passerinus. Three approaches were used: polymerase chain reaction amplification using primers complementary to conserved regions of exon 2, sequencing clones from a genomic library, and amplification of exon 2 using species-specific primers. All three methods indicate that there(More)
The extent of dispersal by pelagic larvae in marine environments, including coral reefs, is central for understanding local population dynamics and designing sustainable marine reserves. We present here the first example of a clear stepping-stone genetic structure throughout the Caribbean basin for a common coral reef species, the French grunt (Haemulon(More)
Latitudinal variation in avian demography played an important early role in the development of life history theory, especially in the idea of a cost of reproduction. Recent attempts to determine the survivorship of tropical birds with mark–recapture statistics have proved controversial. Here, we use a small neotropical bird, the Green-rumped Parrotlet(More)
Six variable protein loci and one variable ribosomal DNA restriction site were used for an analysis of population structure in five species of Polistes from Texas. A sample-reuse algorithm was developed that estimated FST , FIS , and ø (the coefficient of kinship) from probabilities of identity. Of the four species analyzed in detail only one, Polistes(More)
Microsatellite loci are regions of DNA containing tandem repeats of a short sequence motif; they occur abundantly in all eukaryotic genomes and have been shown to be a rich source of highly polymorphic genetic markers in humans and other mammals. These loci are particularly suitable for population studies because they can be relatively easily scored using a(More)
The evolution of worker behavior in the social insects is usually explained by kin selection: although workers do not produce offspring, they do reproduce their genes by aiding the reproduction of relatives. The most difficult case for kin selection theory would be species in which workers are fully capable of reproducing but instead opt to rear brood of(More)
Cyclical oligogyny appears to be the best hypothesis for the maintenance of high levels of relatedness among colony members in epiponine wasps, a tribe of Neotropical social wasps characterized by many queens per colony and reproduction by swarms that contain many queens and workers. The cyclical oligogyny hypothesis predicts that queen number declines as(More)