Preston Bean

Preston Bean
Texas Parks and Wildlife Department · Heart of the Hills Fisheries Science Center

About

18
Publications
2,208
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112
Citations

Publications

Publications (18)
Article
We used stable isotope analysis to investigate differences in Guadalupe bass (Micropterus treculii) resource use that might be associated with population‐level variation in mainstem river versus tributary stream habitats. Guadalupe bass from mainstem sites had higher δ13C and δ15N values compared to those collected in tributaries, likely reflecting...
Technical Report
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Update on Guadalupe Bass Restoration Initiative
Article
Full-text available
Hybridization is common in fishes and can result in a wide range of outcomes. The capture of a world record phenotypic Guadalupe Bass Micropterus treculii raised questions about potential hybridization with Spotted Bass M. punctulatus. Subsequent, limited genetic sampling from the drainage (Colorado River) did not indicate hybridization in the worl...
Article
Full-text available
Understanding the degree of intraspecific variation within and among populations is a key aspect of predicting the capacity of a species to respond to anthropogenic disturbances. However, intraspecific variation is usually assessed at either limited temporal, but broad spatial scales or vice versa, which can make assessing changes in response to lo...
Article
Full-text available
Habitat heterogeneity at multiple scales is a major factor affecting fish assemblage structure. However, assessments that examine these relationships at multiple scales concurrently are lacking. The lack of assessments at these scales is a critical gap in understanding as conservation and restoration efforts typically work at these levels.A combina...
Conference Paper
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Florida bass Micropterus floridanus have been stocked in reservoirs across much of the range of largemouth bass Micropterus salmoides. However, little is known of the effects of stocking fish in reservoirs on upstream populations. We examined hybridization between native largemouth bass and introduced Florida bass in the Devils River, Texas, upstre...
Conference Paper
Full-text available
Gray Redhorse Moxostoma congestum is native to upland streams from the Brazos River in Texas to the Río Soto La Marina in Tamaulipas, Mexico. Populations of gray redhorse are stable across much of its range, but habitat degradation associated with dewatering of streams has led to the decline of some populations in the western portion of its range....
Article
Full-text available
The stocking of fishes outside of their native range for the purpose of sport fisheries can lead to secondary contact and introgression between species that were historically allopatrically distributed. Smallmouth Bass Micropterus dolomieu were introduced within the range of Guadalupe Bass M. treculii in central Texas and introgressive hybridizatio...
Conference Paper
The population genetic structure of aquatic species are largely influenced by geographic factors, but can also be influenced by contemporary factors including anthropogenic activities such as stocking of hatchery reared fish and translocations. The Guadalupe bass, Micropterus treculii, is native to the western gulf slope drainages from the Brazos t...
Conference Paper
The Guadalupe bass, Micropterus treculii, is endemic to streams of central Texas and occurs primarily in the Edwards Plateau. We investigated the trophic ecology of Guadalupe bass using gut content data as well as carbon and nitrogen stable isotopes. We also sampled potential prey items to determine whether or not diet differences among populations...
Article
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La modificación de flujo de arroyos como reducida alimentación por manantiales y la construcción a pequeña escala de diques ha provocado la disminución del bagre lobo (Ictalurus lupus) a lo largo de mucha de su distribución geográfica, así como la competencia con el bagre de canal (I. punctatus). Hibridación entre el bagre lobo y el bagre de canal...
Article
Full-text available
The ecology of Notropis atrocaudalis (Blackspot Shiner) including habitat associations, population age structure, reproduction, and food habits were examined in two east Texas streams from November 2001 through October 2002. Blackspot Shiner were generally found in relatively shallow, slow-flowing runs, but exhibited no strong seasonal habitat asso...
Article
Full-text available
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 Guada...
Article
Reproduction and diet of gray redhorse (Moxostoma congestum) were examined in a Texas Hill Country stream and a central Texas reservoir from September 2004 through August 2005. Temporal patterns in gonadosomatic index and oocyte diameter relative frequency indicated that M. congestum spawns over two distinct periods during spring and likely spawns...
Article
Spatial and temporal patterns in occurrence, abundance, and habitat associations of the Blanco River drainage fish assemblage were examined among ten sites that were sampled quarterly for two years. Cyprinids comprised 78% of the overall assemblage, with Cyprinella venusta (41%), Pimephales vigilax (14%), and Notropis amabilis (11%) being the most...

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