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. 2021 Dec 18;9(1):46–66. doi: 10.1080/23328940.2021.1988817

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© 2021 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 6. — Heart rate and muscle blood flow (as a percentage of mean resting muscle blood flow, %RMBF) of a trained harbor seal (Phoca vitulina) during a 5-minute submersion. The seal was accustomed to 3-minute submersions after which its heart rate and muscle blood flow declined to levels similar to naïve seals during submersion. The abrupt change at 3 minutes (dashed line) demonstrates the psychological influences on the physiological responses associated with the dive response. Reprinted with permission from Jobsis et al. 2001. Effects of training on forced submersion responses in harbor seals. The Journal of Experimental Biology, 204: 3877-3885. © The Company of Biologists Ltd.