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Ice nucleation activity in a New Zealand alpine cockroach Celatoblatta quinquemaculata (Dictyoptera: Blattidae)

Worland, M.R.; Sinclair, B.J.; Wharton, D.A.. 1997 Ice nucleation activity in a New Zealand alpine cockroach Celatoblatta quinquemaculata (Dictyoptera: Blattidae). CryoLetters, 18 (6). 327-334.

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Abstract/Summary

The New Zealand alpine cockroach Celatoblatta quinquemaculata (Dictyoptera: Blattidae) survives temperatures up to 5°c below its supercooling point (scp) of -5.4°C in summer-acclimated samples. This high Scp suggests that C. quinquemaculata utilises potent ice nucleators to avoid extensive supercooling. The distribution of ice nucleating agents within the cockroach was investigated by measuring the SCP and ice nucleator activity of component parts of the body. Both the haemolymph and gut contain high numbers of nucleators active at -4°C. It is proposed that insects of this category, which possess limited freeze tolerance, should be termed moderately freeze tolerant.

Item Type: Publication - Article
Programmes: BAS Programmes > Pre 2000 programme
ISSN: 0143-2044
Additional Keywords: Celatoblatta quinquemaculata, cockroach, New Zealand, ice nucleation, freeze tolerance
Date made live: 11 Oct 2016 08:47 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/514788

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