Skip to main content
Advanced Search

Filters: Tags: Gila (X) > Types: Citation (X)

26 results (52ms)   

View Results as: JSON ATOM CSV
Crayfish are not native to the Colorado River basin (CRB), however they are now established in portions of the mainstem and in many tributaries. I used density manipulation experiments in a laboratory setting to determine intra- and interspecific competition for food between Orconectes virilis, an aggressive polytrophic crayfish now common in the CRB, and two native fishes: Gila chub, Gila intermedia, and flannelmouth sucker, Catostomus latipinnis. I tested each fish species in separate trials. Growth of Gila chub decreased when animal densities increased, however they were more affected by intraspecific competition than by crayfish presence. In contrast, growth of flannelmouth suckers was more affected by crayfish...
thumbnail
The extent and impact of introgressive hybridization was examined in the Gila robusta complex of cyprinid fishes using mitochondrial DNA (mtDNA) sequence variation. Lower Colorado River basin populations of G. robusta, G. elegans, and G. cypha exhibited distinct mtDNAs, with only limited introgression of G. elegans into G. cypha. The impact of hybridization was significant in upper Colorado River basin populations; most upper basin fishes sampled exhibited only G. cypha mtDNA haplotypes, with some individuals exhibiting mtDNA from G. elegans. The complete absence of G. robusta mtDNA, even in populations of morphologically pure G. robusta, indicates extensive introgression that predates human influence. Analysis...


map background search result map search result map The role of introgressive hybridization in the evolution of the Gila robusta complex (Teleostei: Cyprinidae) USGS Topo Map Vector Data (Vector) 34501 Payson South AZ (published 20240103) Shapefile USGS Topo Map Vector Data (Vector) 39600 San Carlos Reservoir AZ (published 20240103) FileGDB USGS Topo Map Vector Data (Vector) 39600 San Carlos Reservoir AZ (published 20240103) Shapefile USGS Topo Map Vector Data (Vector) 46762 Verde Hot Springs AZ (published 20240103) Shapefile USGS Topo Map Vector Data (Vector) 50150 Young AZ (published 20240103) FileGDB USGS Topo Map Vector Data (Vector) 50150 Young AZ (published 20240103) Shapefile USGS Topo Map Vector Data (Vector) 7386 Carrizo AZ (published 20240103) Shapefile USGS Topo Map Vector Data (Vector) 7386 Carrizo AZ (published 20240103) FileGDB USGS Topo Map Vector Data (Vector) 28340 McDonald Mountain AZ (published 20240103) Shapefile USGS Topo Map Vector Data (Vector) 28340 McDonald Mountain AZ (published 20240103) FileGDB USGS Topo Map Vector Data (Vector) 35202 Pinal Peak AZ (published 20240103) FileGDB USGS Topo Map Vector Data (Vector) 35202 Pinal Peak AZ (published 20240103) Shapefile USGS Topo Map Vector Data (Vector) 38314 Rockinstraw Mountain AZ (published 20240103) FileGDB USGS Topo Map Vector Data (Vector) 38314 Rockinstraw Mountain AZ (published 20240103) Shapefile USGS Topo Map Vector Data (Vector) 44828 Theodore Roosevelt Dam AZ (published 20240103) FileGDB USGS Topo Map Vector Data (Vector) 44828 Theodore Roosevelt Dam AZ (published 20240103) Shapefile USGS Topo Map Vector Data (Vector) 7042 Cane Springs Mountain AZ (published 20240103) Shapefile USGS National Boundary Dataset (NBD) in Arizona State or Territory (published 20240215) FileGDB USGS Topo Map Vector Data (Vector) 34501 Payson South AZ (published 20240103) Shapefile USGS Topo Map Vector Data (Vector) 39600 San Carlos Reservoir AZ (published 20240103) FileGDB USGS Topo Map Vector Data (Vector) 39600 San Carlos Reservoir AZ (published 20240103) Shapefile USGS Topo Map Vector Data (Vector) 46762 Verde Hot Springs AZ (published 20240103) Shapefile USGS Topo Map Vector Data (Vector) 50150 Young AZ (published 20240103) FileGDB USGS Topo Map Vector Data (Vector) 50150 Young AZ (published 20240103) Shapefile USGS Topo Map Vector Data (Vector) 7386 Carrizo AZ (published 20240103) Shapefile USGS Topo Map Vector Data (Vector) 7386 Carrizo AZ (published 20240103) FileGDB USGS Topo Map Vector Data (Vector) 28340 McDonald Mountain AZ (published 20240103) Shapefile USGS Topo Map Vector Data (Vector) 28340 McDonald Mountain AZ (published 20240103) FileGDB USGS Topo Map Vector Data (Vector) 35202 Pinal Peak AZ (published 20240103) FileGDB USGS Topo Map Vector Data (Vector) 35202 Pinal Peak AZ (published 20240103) Shapefile USGS Topo Map Vector Data (Vector) 38314 Rockinstraw Mountain AZ (published 20240103) FileGDB USGS Topo Map Vector Data (Vector) 38314 Rockinstraw Mountain AZ (published 20240103) Shapefile USGS Topo Map Vector Data (Vector) 44828 Theodore Roosevelt Dam AZ (published 20240103) FileGDB USGS Topo Map Vector Data (Vector) 44828 Theodore Roosevelt Dam AZ (published 20240103) Shapefile USGS Topo Map Vector Data (Vector) 7042 Cane Springs Mountain AZ (published 20240103) Shapefile USGS National Boundary Dataset (NBD) in Arizona State or Territory (published 20240215) FileGDB The role of introgressive hybridization in the evolution of the Gila robusta complex (Teleostei: Cyprinidae)