Freezing avoidance and the presence of ice in shallow water Antarctic fishes

Fishes inhabiting ice-laden waters of McMurdo Sound, Antarctica, have ice present on all external tissues. This includes the integument, gills, and intestinal tract. With one exception, all internal tissues and fluids including the heart, liver, red muscle, white muscle, blood, bile, urine and ocular fluids are ice-free. Ice is consistently identified in the spleens from three shallow water species. This, in vivo, presence of ice is presupposed by the in vitro mechanism of antifreeze activity. The presence of internal ice explains why all nototheniids in McMurdo Sound produce high systemic concentrations of antifreezes. Furthermore, its localization to the spleen suggests that one function of this organ is to remove ice crystals from the systemic circulation.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Physiology

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2011

Author dc:creator

• Tien, Raymond

Contributors dc:contributor

• DeVries, Arthur L.

• Biology, Oceanography
• Biology, Animal Physiology
• Biology, Zoology

Statement dc:rights

• Copyright 1995 Tien, Raymond

Language dc:language

eng

Identifier

AAI9543746
(UMI)AAI9543746

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/20279