Body water conservation through selective brain cooling by the carotid rete: a physiological feature for surviving climate change?

Show simple item record

dc.contributor.author Strauss, W.M.
dc.contributor.author Hetem, R.S.
dc.contributor.author Mitchell, D.
dc.contributor.author Maloney, S.K.
dc.contributor.author O’Brien, H.D.
dc.contributor.author Meyer, L.C.R.
dc.contributor.author Fuller, A.
dc.date.accessioned 2017-10-03T09:44:26Z
dc.date.available 2017-10-03T09:44:26Z
dc.date.issued 2017-03
dc.identifier.citation Strauss, W.M. et al. 2017. Body water conservation through selective brain cooling by the carotid rete: a physiological feature for surviving climate change? CONSERVATION PHYSIOLOGY 5(1): Article number cow078; en_ZA
dc.identifier.issn 2051-1434 (Online)
dc.identifier.uri http://hdl.handle.net/10539/23219
dc.description.abstract Some mammals have the ability to lower their hypothalamic temperature below that of carotid arterial blood temperature, a process termed selective brain cooling. Although the requisite anatomical structure that facilitates this physiological process, the carotid rete, is present in members of the Cetartiodactyla, Felidae and Canidae, the carotid rete is particularly well developed in the artiodactyls, e.g. antelopes, cattle, sheep and goats. First described in the domestic cat, the seemingly obvious function initially attributed to selective brain cooling was that of protecting the brain from thermal damage. However, hyperthermia is not a prerequisite for selective brain cooling, and selective brain cooling can be exhibited at all times of the day, even when carotid arterial blood temperature is relatively low. More recently, it has been shown that selective brain cooling functions primarily as a water-conservation mechanism, allowing artiodactyls to save more than half of their daily water requirements. Here, we argue that the evolutionary success of the artiodactyls may, in part, be attributed to the evolution of the carotid rete and the resulting ability to conserve body water during past environmental conditions, and we suggest that this group of mammals may therefore have a selective advantage in the hotter and drier conditions associated with current anthropogenic climate change. A better understanding of how selective brain cooling provides physiological plasticity to mammals in changing environments will improve our ability to predict their responses and to implement appropriate conservation measures. en_ZA
dc.language.iso en en_ZA
dc.publisher Oxford University Press (OUP) en_ZA
dc.rights © The Author 2017. Published by Oxford University Press and the Society for Experimental Biology.This is an Open Access article distributed under the terms of the Creative Commons Attribution License en_ZA
dc.subject Artiodactyl success en_ZA
dc.subject brain temperature en_ZA
dc.subject carotid arterial blood temperature en_ZA
dc.subject osmoregulation en_ZA
dc.subject physiological plasticity en_ZA
dc.subject Rostral epidural rete mirabile en_ZA
dc.title Body water conservation through selective brain cooling by the carotid rete: a physiological feature for surviving climate change? en_ZA
dc.type Article en_ZA
dc.journal.volume 5 en_ZA
dc.journal.title CONSERVATION PHYSIOLOGY en_ZA
dc.description.librarian EM2017 en_ZA
dc.citation.doi doi:10.1093/conphys/cow078 en_ZA
dc.citation.issue 1 en_ZA


Files in this item

This item appears in the following Collection(s)

Show simple item record

Search WIReDSpace


Browse

My Account