Data from: Parallel shifts in trout feeding morphology suggest rapid adaptation to alpine lake environments

Eco-evolutionary interactions following ecosystem change provide critical
insight into the ability of organisms to adapt to shifting resource
landscapes. Here we explore evidence for the rapid parallel evolution of
trout feeding morphology following eco-evolutionary interactions with
zooplankton in alpine lakes stocked at different points in time in the
Wind River Range (Wyoming, USA). In this system, trout predation has
altered the zooplankton species community and driven a decrease in average
zooplankton size. In some lakes that were stocked decades ago, we find
shifts in gill raker traits consistent with the hypothesis that trout have
rapidly adapted to exploit available smaller-bodied zooplankton more
effectively. We explore this morphological response in multiple lake
populations across two species of trout (cutthroat trout, Oncorhynchus
clarkii, and golden trout Oncorhynchus aguabonita) and examine the impact
of resource availability on morphological variation in gill raker number
among lakes. Furthermore, we present genetic data to provide evidence that
historically stocked cutthroat trout populations likely derive from
multiple population sources, and incorporate variation from genomic
relatedness in our exploration of environmental predictors of feeding
morphology. These findings describe rapid adaptation and eco-evolutionary
interactions in trout and document an evolutionary response to novel,
contemporary ecosystem change.