...Shun Maekawa; Hitomi Iemura; Takashi Kato SUMMARY Hematopoietic responses to environmental factors are not fully characterized. Polycythemia has been reported during exposure to low temperatures in ectothermic animals. The relationship between the causes of polycythemia and erythropoiesis during...

...-1 was enhanced 10-fold; accumulation of iron as a result of heme degradation was observed in the liver. One day after low-temperature exposure, erythropoietin mRNA expression was elevated in the liver and lung compared with that at normal temperature (22°C) by qRT-PCR analysis. Examination of liver...

...S. L. Chown; J. G. Sørensen; B. J. Sinclair SUMMARY In a recent publication, Hawes and Bale provide an extended discussion of phenotypic plasticity in the context of low temperature responses of animals. They argue that phenotypic plasticity may be partitioned phylogenetically at several levels...

... at 8°C. However, liver glycogen was depleted in fish subjected to the low-temperature challenge and at a faster rate in starved than in fed fish. Stored glycogen in liver and other tissues can account for only a small amount of the total glycerol production, suggesting a strong requirement for food...

...). The maximal, in vitro activity of GPDH, increased twofold in association with a sharp increase in plasma glycerol level. The metabolite levels and enzyme activities provide complementary evidence that GPDH is a regulatory site in the low temperature triggered synthesis of glycerol. Indirect evidence, based...

... for correspondence (e-mail: [email protected] ) 13 8 2002 © The Company of Biologists Limited 2002 2002 Low temperature X-ray microanalysis calcium mucus coral Galaxea fascicularis active transport Donnan equilibria frozen-hydrated The study of calcification dynamics...

... used for active thermoregulation. * e-mail: [email protected] 23 03 2000 23 05 2000 © 2000 by Company of Biologists 2000 thermoregulation polar low temperature physiology pinniped Antarctic fur seal Arctocephalus gazella . For an endotherm to maintain...