Like many fish species, Rio Grande Cutthroat Trout will face additional challenges in a warming future. We explored the consequences of the wide variety of factors thought to influence persistence of the 121 remaining populations to 2080. Although streams are predicted to warm, less than 10% of populations will be affected. In contrast, nearly 65% are predicted to be extirpated (or nearly so) by nonnative trout that have already invaded or are expected to soon. Many populations will require the help of managers if they are to persist well into the 21st century…Read more

We investigated associations of fish assemblages and habitat characteristics (e.g., morphology and water chemistry) from 45 natural lakes and reservoirs in Iowa to determine whether species or trophic guild composition and environmental correlations were concordant between waterbodies of different origins. Overall, fish assemblage composition between natural lakes and reservoirs was consistently dissimilar based on a permutational multivariate ANOVA….Read more

The use of unmanned aircraft systems (UASs), commonly referred to as drones, has rapidly expanded across many scientific disciplines. Like other fields, fisheries research would benefit significantly from broader use of this emerging technology but has lagged behind other disciplines. Like the implementation of satellite and aircraft‐based remote sensing technology in previous decades brought a greater understanding of large‐scale spatial patterns and processes, UAS technology has the potential to put those tools in the hands of individual researchers, allowing implementation at finer spatial and temporal scales for a fraction of the cost. Our goal is to provide a “how‐to” for fisheries researchers interested in using UAS technology… Read more

In most fisheries, larger fish experience substantially higher mortality than smaller fish. Body length, life history, and behavioral traits are often correlated, such that fisheries‐induced changes in size or life history can also alter behavioral traits. However, empirical evidence regarding how size‐selective harvesting alters the evolution of behavioral traits in exploited stocks is scarce. We used experimental lines of Zebrafish Danio rerio that were exposed to positively size‐selective, negatively size‐selective, or random harvest over five generations…Read more