Data for: Local environments, not hybridization, influence cardiac performance of native trout under acute thermal stress

Climate-induced expansion of invasive hybridization (breeding between invasive and native species) poses a significant threat to the persistence of many native species worldwide. In the northern US Rocky Mountains, hybridization between native cutthroat trout and non-native rainbow trout has increased in recent decades due, in part, to climate-driven increases in water temperature. It has been postulated that invasive hybridization may enhance physiological tolerance to climate-induced thermal stress because laboratory studies indicate that rainbow trout have a higher thermal tolerance than cutthroat trout. Here, we assessed whether invasive hybridization improves cardiac performance response to acute water temperature stress of native wild trout populations. We collected trout from four streams with a wide range of non-native admixture among individuals and with different temperature and streamflow regimes in the upper Flathead River drainage, USA. We measured individual cardiac perfor..., , , # Data for: Local Environments, not hybridization, influence cardiac performance of native trout under acute thermal stress

[https://doi.org/10.5061/dryad.crjdfn3c4](https://doi.org/10.5061/dryad.crjdfn3c4)

Paper: Local environments, not invasive hybridization, influence cardiac performance of native trout under acute thermal stress

Authors: Jeffrey T. Strait, Jared A. Grummer, Nicholas F. Hoffman, Clint C. Muhlfeld, Shawn R. Narum, and Gordon Luikart

Description:

This README file describes the data accompanying the above publication.

Files:

1\. data folder: Includes the csv file with the containing information for each fish tested as part of the study.

1a. dataset: Cardic_admixture_data.csv

population - the creek in which the individual was sampled

LabID - unique laboratory ID used to track genetic data

year - the year in which the individual was captured and cardiac performance test conducted

prbt - the estimate of proportion Rainbow Trout admixture (hybridization) from RA...,