Data from: Harvesting wildlife affected by climate change: a modelling and management approach for polar bears ...

• Main Authors: Regehr, Eric V., Wilson, Ryan R., Rode, Karyn D., Runge, Michael C., Stern, Harry L.
• Format: Dataset
• Language: English
• Published: Dryad 2018
• Subjects: habitat loss; harvest; polar bear; sustainable; risk; state-dependent management; Ursus maritimus; Chukchi Sea; Beaufort Sea; Chukchi; Sea ice
• Online Access: https://dx.doi.org/10.5061/dryad.f68m0; https://datadryad.org/stash/dataset/doi:10.5061/dryad.f68m0

The conservation of many wildlife species requires understanding the demographic effects of climate change, including interactions between climate change and harvest, which can provide cultural, nutritional or economic value to humans. We present a demographic model that is based on the polar bear Ursus maritimus life cycle and includes density-dependent relationships linking vital rates to environmental carrying capacity (K). Using this model, we develop a state-dependent management framework to calculate a harvest level that (i) maintains a population above its maximum net productivity level (MNPL; the population size that produces the greatest net increment in abundance) relative to a changing K, and (ii) has a limited negative effect on population persistence. Our density-dependent relationships suggest that MNPL for polar bears occurs at approximately 0·69 (95% CI = 0·63–0·74) of K. Population growth rate at MNPL was approximately 0·82 (95% CI = 0·79–0·84) of the maximum intrinsic growth rate, ... : Chukchi Sea ice dataSea-ice data are provided in two text files: "Chukchi Sea ice data.txt" and "Southern Beaufort Sea ice data.txt". The data and methods to process them are described in the main text of Regehr et al. (2017) and the Supporting Information Appendix S3. Please see "Sea ice METADATA.txt" for further details.Sea ice METADATA.txtSouthern Beaufort Sea ice dataSea-ice data are provided in two text files: "Chukchi Sea ice data.txt" and "Southern Beaufort Sea ice data.txt". The data and methods to process them are described in the main text of Regehr et al. (2017) and the Supporting Information Appendix S3. Please see "Sea ice METADATA.txt" for further details.Sea ice METADATA.txt ...