Skip to main page content
Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
, 156 (2), 229-36

Warm Brain and Eye Temperatures in Sharks

Warm Brain and Eye Temperatures in Sharks

B A Block et al. J Comp Physiol B.

Abstract

Temperatures in the brain and eyes of mako and porbeagle sharks (Lamnidae) are 5 degrees C warmer than the water while the brain and eye temperatures in six other species of pelagic sharks are within 0.1 degrees C of water temperature. An orbital rete mirabile is present in the porbeagle and mako sharks but absent in the cranial vasculature of eleven other species of pelagic sharks. The orbital rete in the head of the porbeagle and mako sharks acts as a heat exchanger which conserves metabolic heat and raises the local tissue temperatures. This brain and eye warming system should buffer the central nervous system from the effects of rapid temperature change. Warming of the retina may improve the visual sensitivity of these active predators.

Similar articles

See all similar articles

Cited by 12 PubMed Central articles

See all "Cited by" articles

References

    1. Comp Biochem Physiol. 1964 Dec;13:433-42 - PubMed
    1. Annu Rev Physiol. 1981;43:281-300 - PubMed
    1. Annu Rev Physiol. 1982;44:85-96 - PubMed
    1. J Physiol. 1972 Feb;220(3):711-28 - PubMed
    1. J Appl Physiol. 1957 May;10(3):405-11 - PubMed

Publication types

LinkOut - more resources

Feedback