## Abstract Overwintering larvae of the darkling beetle, __Meracantha contracta__, produce a macromolecular antifreeze that is similar in activity to the glycoproteinaceous and proteinaceous antifreezes found in some coldโwater, marine teleost fishes. The antifreeze is not present in the hemolymph
Environmental effects on antifreeze levels in larvae of the darkling beetle,Meracantha contracta
โ Scribed by Duman, John G.
- Publisher
- John Wiley and Sons
- Year
- 1977
- Tongue
- English
- Weight
- 283 KB
- Volume
- 201
- Category
- Article
- ISSN
- 0022-104X
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โฆ Synopsis
Abstract
Acclimation of Meracantha contracta larvae collected in late summer to low temperatures, short photoperiods or low relative humidities induces production of a macromolecular antifreeze which functions to depress the freezing and supercooling points of the larvae. Overwintering larvae must be exposed to a combination of high temperature and long photoperiod before the antifreeze is lost.
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## Abstract The respiratory function of the hemocyanin (Hcy)โcontaining blood in the aquatic spider crab, __Libinia emarginata__, and the terrestrial ghost crab, __Ocypode guadrata__, was studied in animals exposed to normoxic and hypoxic conditions a t 25ยฐC. In __L__. __emarginata__ low concentrat