Hair samples obtained from barbed wire can identify bears from DNA, assess trophic position from stable isotopes, and yield other data. For brown bears (Ursus arctos), a wire height of 50 cm has become standard protocol, but the efficacy of this height has not been evaluated. Here, we briefly review this protocol, and use data from wires across small streams in Alaska to calculate the probability that barbs at a given height obtained samples. We obtained 1,939 hair samples between 2012 and 2019 for an overall daily sampling success rate per barb of 1.55%. Samples were obtained over the range of barb heights (6–97.5 cm), but daily success rate varied from 0.2% at the lowest and highest barbs to 2% from 40 to 70 cm in height. Thus, 50 cm was an effective height and a wider range yielded similar success rates, though wire height may be selective for bears with respect to size and other traits.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.
Vol. 2022 • No. 33e2