Abstract：
:Resting potentials in Apis mellifera and Drosophila melanogaster flight muscles decrease with falling temperatures. When resting potentials fall to between -37 and -45 mV they activate a final burst of spontaneous muscle action potentials (MAPs). This final burst of MAPs marks the beginning of chill-coma for each species. The temperature at which the final burst occurs for D. melanogaster (7.0+/-0.9 degrees C) is significantly lower than that of A. mellifera workers (10.6+/-1.2 degrees C), queens (10.2+/-0.8 degrees C), and drones (12.8+/-0.8 degrees C). Prior to chill-coma, MAP amplitudes decrease and durations increase with falling temperatures in both A. mellifera and D. melanogaster. The rate of these changes and the temperatures at which they occur appear to be related to the rate of decline in each species' resting potential. These results suggest that insect chill-coma varies with a species' ability to maintain its resting potential at low temperatures.
journal_name
J Insect Physioljournal_title
Journal of insect physiologyauthors
Hosler JS,Burns JE,Esch HEdoi
10.1016/s0022-1910(99)00148-1keywords:
subject
Has Abstractpub_date
2000-05-01 00:00:00pages
621-627issue
5eissn
0022-1910issn
1879-1611pii
S0022191099001481journal_volume
46pub_type
杂志文章abstract：:Although scientists know that overheating kills many organisms, they do not agree on the mechanism. According to one theory, referred to as oxygen- and capacity-limitation of thermal tolerance, overheating occurs when a warming organism's demand for oxygen exceeds its supply, reducing the organism's supply of ATP. Thi...
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pub_type： 杂志文章
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pub_type： 杂志文章
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journal_title：Journal of insect physiology
pub_type： 杂志文章
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更新日期：2008-02-01 00:00:00
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pub_type： 杂志文章
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pub_type： 杂志文章
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pub_type： 杂志文章
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pub_type： 杂志文章,评审
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