Zoology 567 - Fall 2021 · Brown Bears: Not enough Sleep (Physiological Changes Associated with Hibernation in Ursus arctos)

Title

Brown Bears: Not enough Sleep (Physiological Changes Associated with Hibernation in Ursus arctos)

Source

ZOOL 567, Fall 2021

Contributor

"Chemistry Ideogram - Colour" by j4p4n is licensed under the Public Domain, CC0
"Hibernation Free Icon - Hibernate Clip Art" by Clipartmax is licensed under CC BY-NC 4.0
"Bear" by National Park Service, US is in the Public Domain
"cold temperature " by Vicons Design, GB is licensed under CC BY 4.0
"Hungry As A Bear" by WARPAINT Media Inc., CA is licensed under CC BY 4.0
"Black and white weather forecast icon for snow vector drawing" by freeSVG is in the Public Domain
"Hibernation Free Icon - Hibernation Icon" by Clipartmax is licensed under CC BY-NC 4.0
"Sun symbol clip art" by publicdomainvectors is in the Public Domain

Images not directly attributed are from Canva and are under the Free Media License Agreement, https://www.canva.com/policies/free-media/

Creator

Syed, Faizan

Description

This infographic gives an overview of the physiological changes associated with hibernation in brown bears (Ursus arctos). There are patterns of different physiological changes depending on the 3 phases of hibernation which are initation, maintenance, and termination. Investigating further into these changes can help explain the key protective mechanisms/biological pathways used by bears to keep healthy through months of not moving. Additionally, learning about these can help us keep bears safe by highlighting which stage of hibernation they are in.

References

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[2] González‐Bernardo, E., Russo, L. F., Valderrábano, E., Fernández, Á., & Penteriani, V. (2020). Denning in brown bears. Ecology and Evolution, 10(13), 6844–6862. https://doi.org/10.1002/ece3.6372

[3] Chazarin, B., Storey, K. B., Ziemianin, A., Chanon, S., Plumel, M., Chery, I., Durand, C., Evans, A. L., Arnemo, J. M., Zedrosser, A., Swenson, J. E., Gauquelin-Koch, G., Simon, C., Blanc, S., Lefai, E., & Bertile, F. (2019). Metabolic reprogramming involving glycolysis in the hibernating brown bear skeletal muscle. Frontiers in Zoology, 16(1), 12. https://doi.org/10.1186/s12983-019-0312-2

[4] Evans, A. L., Singh, N. J., Friebe, A., Arnemo, J. M., Laske, T. G., Fröbert, O., Swenson, J. E., & Blanc, S. (2016). Drivers of hibernation in the brown bear. Frontiers in Zoology, 13(1), 7. https://doi.org/10.1186/s12983-016-0140-6

[5] Jørgensen, P. G., Arnemo, J., Swenson, J. E., Jensen, J. S., Galatius, S., & Frøbert, O. (2014). Low cardiac output as physiological phenomenon in hibernating, free-ranging Scandinavian brown bears (Ursus arctos) – an observational study. Cardiovascular Ultrasound, 12(1), 36. https://doi.org/10.1186/1476-7120-12-36

[6] Hissa, R., Siekkinen, J., Hohtola, E., Saarela, S., Hakala, A., & Pudas, J. (1994). Seasonal patterns in the physiology of the European brown bear (Ursus arctos arctos) in Finland. Comparative Biochemistry and Physiology Part A: Physiology, 109(3), 781–791. https://doi.org/10.1016/0300-9629(94)90222-4

[7] Barboza, P. S., Farley, S. D., & Robbins, C. T. (1997). Whole-body urea cycling and protein turnover during hyperphagia and dormancy in growing bears (Ursus americanus and U. arctos). Canadian Journal of Zoology, 75(12), 2129–2136. https://doi.org/10.1139/z97-848

[8] Stenvinkel, P., Fröbert, O., Anderstam, B., Palm, F., Eriksson, M., Bragfors-Helin, A.-C., Qureshi, A. R., Larsson, T., Friebe, A., Zedrosser, A., Josefsson, J., Svensson, M., Sahdo, B., Bankir, L., & Johnson, R. J. (2013). Metabolic changes in summer active and anuric hibernating free-ranging brown bears(Ursus arctos). PLOS ONE, 8(9), e72934. https://doi.org/10.1371/journal.pone.0072934

[9] Lin, D. C., Hershey, J. D., Mattoon, J. S., & Robbins, C. T. (2012). Skeletal muscles of hibernating brown bears are unusually resistant to effects of denervation. Journal of Experimental Biology, 215(12), 2081–2087. https://doi.org/10.1242/jeb.066134

[10] Arinell, K., Sahdo, B., Evans, A. L., Arnemo, J. M., Baandrup, U., & Fröbert, O. (2012). Brown bears (Ursus arctos) seem resistant to atherosclerosis despite highly elevated plasma lipids during hibernation and active state. Clinical and Translational Science, 5(3), 269–272. https://doi.org/10.1111/j.1752-8062.2011.00370.x

Date

December 1st, 2021

Brown Bears: Not enough Sleep (Physiological Changes Associated with Hibernation in Ursus arctos)

Item