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17 February 2025
 
  » pubmed » pmid17779640

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Flight of Winter Moths Near 0{degrees}C
Bernd Heinrich ; Thomas P Mommsen ;
Date 12 Apr 1985
Journal Science, 228 (4696), 177-179
AbstractSome noctuid winter moths fly at near 0 degrees C by maintaining an elevated(30 degrees to 35 degrees C) thoracic muscle temperature. Geometrid winter moths sustain themselves in free flight at subzero muscle temperatures. However, the temperature characteristics of citrate synthase and pyruvate kinase from both of these different kinds of moths and from a sphinx moth that flies with a muscles temperature of 40 degrees C are nearly identical. Furthermore, mass-specific rates of energy expenditure of both kinds of winter moths are also similar at given thoracic temperature (near 0 degrees C). The geometrids that are able to fly with a thoracic temperature near 0 degrees C do so largely because of unusually low wing-loading, which permits a low energetic cost of flight.
Source PubMed, pmid17779640 doi: 10.1126/science.228.4696.177
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