the molecular phylogenetic trees of 42 representative samples of malaysian pangasiid were constructed using cytochrome c oxidase subunit i (coi). the topologies resulting from molecular analyses, maximum parsimony, maximum likelihood, and bayesian inference, revealed the paraphyly of pangasius genus and monophyly of p. nasutus, p. bocourti, p. micronemus, and p. hypopthalmus with high support v...

As the evolutionary significance of hybridization is largely dictated by its extent beyond the first generation, we broadly surveyed patterns of introgression across a sympatric zone of two native poplars (Populus balsamifera, Populus deltoides) in Quebec, Canada within which European exotic Populus nigra and its hybrids have been extensively planted since the 1800s. Single nucleotide polymorph...

The recent introduction of Sirex noctilio F. (Hymenoptera: Siricidae) into North America has raised interest in native siricids and their parasitoids to better understand the potential impact of S. noctilio. In the southeastern United States, we assessed various techniques to capture native siricids and their parasitoids using traps, lures, and trap trees. During 2009Ð2011, in total, 2,434 wasp...

We report on the performance of two different feature sets in the Native Language Identification Shared Task (Tetreault et al., 2013). Our feature sets were inspired by existing literature on native language identification and word networks. Experiments show that word networks have competitive performance against the baseline feature set, which is a promising result. We also present a discussio...

background: the genus eucalyptus (family myrtaceae) comprises well-known plants of over 600 species of trees. although most of the plants are native to australia, numerous species have been introduced to other parts of the world, including iran, as economic and ornamental trees in forest trial provenances, where the plants have become source of important fast-growing hardwood trees and eucalypt...

Accelerating introductions of forest insects challenge decision-makers who might or might not respond with surveillance programs, quarantines, eradication efforts, or biological control programs. Comparing ecological controls on indigenous vs. introduced populations could inform responses to new introductions. We studied the European woodwasp, Sirex noctilio, which is not a pest in its native f...