Susceptibility of Rio Grande Cutthroat Trout to Displacement by Non-Native Brown Trout and Implications for Future Management

The Rio Grande cutthroat trout is New Mexico’s state fish; but habitat loss and non-native trout invasions threaten the persistence of this fish throughout the remaining 12% of its historic range. Stakeholders, including state agencies, federal agencies, Tribal nations, Pueblos, and private groups are particularly concerned about the impact that non-native brown trout have on native cutthroat trout. This project will be the first to demonstrate how non-native brown trout negatively affect Rio Grande cutthroat trout populations. The project has two primary objectives: 1) compare the health and characteristics of native Rio Grande Cutthroat Trout in areas both with and without invasive brown trout in cold and warm...

Categories: Project; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: 2018, CASC, Completed, Fish, Fish, All tags... Projects by Region, Rivers, Streams and Lakes, Rivers, Streams and Lakes, South Central, South Central CASC, Water, Coasts and Ice, Water, Coasts and Ice, Wildlife and Plants, Wildlife and Plants, invasive species, production, temperature, Fewer tags

The Effects of Drought on Rio Grande Cutthroat Trout: The Role of Stream Flow and Temperature

Increasing temperatures and decreasing precipitation threaten the persistence of the Rio Grande cutthroat trout, the southernmost subspecies of cutthroat trout, found only in parts of New Mexico and Colorado. This subspecies appears to be more vulnerable to drought than more northern subspecies, because it occupies small and fragmented streams which are at greater risk of drying up during drought. Most notably, in 2002 drought in the Southwest resulted in the loss of 14 different Rio Grande cutthroat trout populations – about 10% of the total population. While it is known that drought is having an effect on Rio Grande cutthroat trout, the specific ways in which individuals and populations are affected by drought...

Categories: Project; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: 2015, CASC, Climate Change, Completed, Discharge, All tags... Drought, Drought, Drought, Drought, Fire and Extreme Weather, Drought, Fire and Extreme Weather, Fish, Fish, Growth, National CASC, National CASC, Persistence, Projects by Region, Recruitment, Rio Grande cutthroat trout, Rivers, Streams and Lakes, Rivers, Streams and Lakes, Stream Intermittency, Survival, Temperature, Water, Coasts and Ice, Water, Coasts and Ice, Wildlife and Plants, Wildlife and Plants, Fewer tags

Interacting Effects of Density-Dependent and Density-Independent Factors on Growth Rates in Southwestern Cutthroat Trout Populations

Abstract (from Transactions of the American Fisheries Society): Density-dependent (DD) and density-independent (DI) effects play an important role in shaping fish growth rates, an attribute that correlates with many life history traits in fishes. Consequently, understanding the extent to which DD and DI effects influence growth rates is valuable for fisheries assessments because it can inform managers about how populations may respond as environmental conditions continue to change (e.g., threats from climate change). We used a Rio Grande Cutthroat Trout Oncorhynchus clarkii virginalis (RGCT) capture–mark–recapture data set collected over 2 years along a temperature and density gradient in northern New Mexico streams...

Categories: Publication; Types: Citation