Ecological and life history characteristics such as population size, dispersal pattern, and mating system mediate the influence of genetic drift and gene flow on population subdivision. Bull trout (Salvelinus confluentus) and mountain whitefish (Prosopium williamsoni) differ markedly in spawning location, population size and mating system. Based on these differences, we predicted that bull trou...

1. Conservation biologists need tools that can utilize existing data to identify areas with the appropriate habitat for species of conservation concern. Regression models that predict suitable habitat from geospatial data are such a tool. Multiple logistic regression models developed from existing geospatial data were used to identify largescale stream characteristics associated with the occurr...

Amphibian population declines and extinctions are occurring even in the world's least impacted areas. The introduction and spread of nonnative predators is one of many proposed causes of amphibian declines. Correlational studies have shown a negative relationship between introduced fishes and declining amphibians, but little direct experimental evidence is available. This study experimentally m...

Competitive Int era c:tions Betwae11 a Nativ e and Exotic Trout Species in High Mountain Streams

Submersed aquatic plants are a key component of shallow, clear water lakes contributing to primary production and water quality. High mountain lakes are naturally fishless although invasive trout and most recently minnows have been introduced causing a major impact on fauna richness. The Pyrenean high mountain range has preserved soft-water oligotrophic boreal isoetids in their southern limit o...

of the wildlife resources and a producer of additional fish and game via hatcheries and habitat management. Sometimes these roles of commodity versus stewardship are at odds. Such is the case where the DWR stocks exotic species such as rainbow trout to provide recreational fishing while attempting to conserve populations of native species such as the cutthroat trout. Cutthroat are the only trou...

Rieman BE, Dunham JB. Metapopulations and salmonids: a synthesis of B. E. Rieman1, J. B. Dunham2 life history patterns and empirical observations. 1U.S. Forest Service, Rockey Mountain Research Ecology of Freshwater Fish 2000: 9: 51–64. C Munksgaard, 2000 Station, Boise, Idaho, 2Biological Resources Research Center, University of Nevada, Reno, Abstract – Metapopulation theory has attracted cons...

Bull trout Salvelinus confluentus are a species of char that have been intensively studied since they were listed as threatened under the U. S. Endangered Species Act in 1998. Much of the research on bull trout has involved the use of radio telemetry to monitor the movements of this highly mobile species. This project was initiated to compile information on completed and ongoing radio telemetry...