Joshuah S Perkin

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Effects of fragmentation on the ecology of organisms occupying dendritic ecological networks (DENs) have recently been described through both conceptual and mathematical models, but few hypotheses have been tested in complex, real-world ecosystems. Stream fishes provide a model system for assessing effects of fragmentation on the structure of communities(More)
—The Guadalupe bass Micropterus treculii is endemic to Texas and is threatened by introgression with introduced smallmouth bass M. dolomieu as well as habitat degradation. This study described and quantified the movements and habitat associations of Guadalupe bass to assess the factors that may influence current populations. Radio-tagged adult Guadalupe(More)
Deterministic fitness, stochasticity, specia-tion, and dispersal regulate biotic communities within streams at local, regional, and continental scales (Vellend 2010). Anthropogenic modifications to streams often disrupt these regulatory processes and contribute to the current state of crisis facing freshwater biodiversity (Dudgeon et al. 2006). Reductions(More)
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Guadalupe Bass Micropterus treculii diverged from northeastern ancestral Micropterus (Conner and Suttkus1986) approximately 4.1–5.7 million years ago during the late Miocene or early Pliocene (Near et al. 2003, 2005). The species was originally described by Cope (1880) as the Texas (Johnson Fork of the Llano River) version of Florida Bass M. floridanus,(More)
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