Species Composition and Hybridization among Native and Nonnative Catostomid Fishes in Two Streams of the Gunnison River Basin, Colorado
Abstract
We report results from a 3-year field investigation to limit hybridization between native and nonnative suckers in 2 small tributaries of the Gunnison River basin, Delta County, Colorado. Upstream movement to spawning habitat was selectively impeded by picket weir in intermittent Cottonwood Creek. There, native suckers were identified based on morphological characters in the field and were transferred upstream of the weir, whereas nonnative fishes were excluded from upstream movement. Another stream, Potter Creek, was not impeded by weir. Genetic identification of adult fishes in both streams was consistent with morphological identification in the field. Larval genetic identification was consistent with probable spawning species in Potter Creek. However, in Cottonwood Creek, larval fish proportions differed significantly from likely spawners. Proportions of nonnative suckers were high in Cottonwood Creek because exclusion structures were compromised by flooding during the spawning season. Yet, instream control of spawning by nonnative fishes has potential for reducing the incidence of hybridization, but practical challenges remain for implementation in the field.
Local Knowledge Graph (5 entities)
Related Works
Items connected by shared entities, co-authorship, citations, or semantic similarity.
Data from: Historical stocking data and 19th century DNA reveal human-induced changes to native diversity and distribution of cutthroat trout
Winters are changing: snow effects on Arctic and alpine tundra ecosystems
Origins and movements of invasive piscivores determined from otolith isotopic markers
Ichthyofaunal Studies of the Gunnison River, Colorado
The Nonnative Iowa Darter (Etheostoma exile) Established in the Yampa River, Colorado, and Green River, Utah
Minimum Flow Recommendation for Passage of Colorado Squawfish and Rasorback Sucker in the 2.3 Mile Reach of the Lower Gunnison River: Redlands Diversion Dam to the Colorado River Confluence
Some Factors Historically Affecting The Distribution and Abundance of Fishes In The Gunnison River
Genomic and Transcriptomic Analysis of the Whirling Disease-Resistant Gunnison River Rainbow Trout - Supplementary Data
Genomic and Transcriptomic Analysis of the Whirling Disease-Resistant Gunnison River Rainbow Trout - Supplementary Data
Cited 1 times
References (18)
18 references to works outside the Knowledge Hub