Hybridization of the Cutthroat Trout:Here you will find the facts about why the cutthroat is in danger in most of it’s native areas. The interbreeding with other trout species has had a negative effect on this trout. Learn about what measures are being taken to help this species. Here is...
Genetic divergence and identification of seven cutthroat trout subspecies and rainbow trout. Transactions of the American Fisheries Society, 116: 580-587.Leary, R.F., Allendorf, F.W., Phelps, S.R. & Knudsen, K.L. 1987. Genetic divergence and identification of seven cut- throat subspecies ...
Coastal Cutthroat Trout (Oncorhynchus clarkii clarkii) are often the only fish species present in 1st- and 2nd-order headwater streams in the Pacific Northwest, and while trout in these systems are well adapted to a Mediterranean climate with natural low-flow in summer, the frequency and severity...
• Habitat availability included 57.5 km main stem river plus approximately 59 km tributary habitat; • Genetic integrity of the Westslope Cutthroat Trout (pure strain with no hybridization with other trout species); and • Condition factor, growth rates, population age structure and growth mode...
Fish size did not influence correct phenotypic identification, although fry were excluded from our study. A logistic regression model predicted that biologists were more than 50% likely to visually detect Rainbow Trout traits in a hybrid when its level of hybridization was greater than 22% (95% ...
In western North America, native cutthroat trout Oncorhynchus clarkii subspecies are declining dramatically across their ranges; competition and hybridization with nonnative rainbow trout O. mykiss are recognized as key factors in their decline. Presently, identification of cutthroat trout rainbow trout ...
Anadromous speciesGeneticsFreshwater fishHybridsStock identificationPopulation geneticsHybridizationGenotypesBody sizeBecause of their similar appearance and frequent hybridization, juvenile steelhead Oncorhynchus mykiss and coastal cutthroat trout O. clarkii clarkii are difficult to distinguish visually. Nevertheless, ...
OmyY1 sequences were aligned and used to reconstruct a phylogeny of the cutthroat trout subspecies and related species via maximum-parsimony and Bayesian analyses. In the Y-haplotype phylogeny, clade distributions generally corresponded to the geographic distributions of the recognized subspecies. This ...
Rainbow and cutthroat trouts differed from each other only in that the insertion of the dorsal fin and origin of the adipose fin were more posterior in rainbow trout. Brown trout differed from the other species in having longer pectoral fins, an elliptical yolk and unique pigmentation on the ...
rivers, spawning, habitats, streams, Oncorhynchus clarkii, trout, radio frequency identification, invasive species, population dynamics, radio, spring, radio telemetry, watersheds, life history, habitat destruction, mortality, climate changeOver the last century, native trout have experienced dramatic ...