National CASC

Fish that are harvested from rivers and lakes play an important role in ensuring global food security. However, data on river fisheries is not collected in any standardized format globally. Although targeted analyses have been conducted on certain river systems, the approaches used, such as intensive field sampling, are not feasible at a global scale. Most river fish are harvested by...

Global scientific assessment processes are intended to synthesize information from across many regions of the world. This involves reviewing and including information from many sources, including those published in different languages and with authors from different countries. These processes aim to mobilize a broader knowledge base and increase legitimacy of these assessment processes...

Recent changes in climate are having profound effects on many fish and wildlife species, and projections suggest that those trends are likely to continue. Changing climate conditions have the potential to transform ecosystems, which impacts not only fish and wildlife but also human communities, which rely on ecosystems for important goods and services such as food and water filtration...

Changing climate conditions could have significant impacts on wildlife health. Shifts in temperature and precipitation may directly affect the occurrence of disease in fish and wildlife by altering their interactions with pathogens (such as the bacterium that causes Lyme disease), helping vectors like mosquitoes and ticks expand their range, or speeding up the time it takes for a...

Inland recreational fishing, defined as primarily leisure-driven fishing in freshwaters, is a popular past-time in the USA. State natural resource agencies endeavor to provide high-quality and sustainable fishing opportunities for anglers. Managers often use creel and other angler-survey data to inform state- and waterbody-level management efforts. Despite the broad implementation of...

As the origin of three major basins that drain the Columbia, Missouri, and Saskatchewan rivers, Montana is the hydrologic apex for North America. The Northern Rocky Mountain region is home to some of the last remaining interconnected habitats for many native fishes, including the threatened bull trout and native westslope cutthroat trout. The Northern Rockies are also experiencing...

Climate change represents one of the foremost drivers of ecological change, yet its documented impacts on biodiversity remain uncertain and complex. Although there have been many published studies on species shifting their geographic ranges in response to climate change, it is still challenging to identify the specific mechanisms and conditions that facilitate range shifts in some...

Different species have different ways of coping with changing climate conditions. Some species may move to more-favorable habitats, others may change their behavior (such as by shifting their diets), and still others may change the timing of life-cycle events (such as migration). The ability of a species to accommodate changing conditions is known as its “adaptive capacity”...

Migratory birds are responding to changes in climate in complex and sometimes unpredictable ways. The timing of breeding and migration typically coincide with the periods of peak food availability; however, these peaks are shifting as temperatures and precipitation patterns change, resulting in a mismatch in the timing of key events. The degree to which this mismatch is impacting...

Climate change, the spread of invasive species, and shifts in natural disturbance regimes such as wildfires and drought represent major challenges facing forest managers in the Adirondack region of New York, and across the northeastern US. Managers require a suite of potential adaptive management options that could be implemented depending on how conditions change. Although general...

Extreme events not only affect people but can have detrimental impacts on natural resources, such as fish and freshwater habitats. Impacts of extreme events, like hurricanes, tornadoes, and extreme flooding, have immediate consequences, but also have the ability to alter habitats and animals far in the future by providing opportunities for exotic species to colonize new areas. Some fish