Thermal sensitivity of oxygen uptake of Diptera from sub-Antarctic South Georgia and Marion Island
Thermal sensitivity of oxygen uptake of Diptera from sub-Antarctic South Georgia and Marion Island
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亚南极南乔治亚岛和马里恩岛双翅目吸氧量的热敏感性
DOI：
10.1007/s003000050108
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发表时间：
1997
期刊：
影响因子：
1.7
通讯作者：
S. L. Chown
中科院分区：
文献类型：
--
作者：
S. L. Chown
本文比较了位于南极极锋以北马里恩岛的德氏拟步行虫（Paractoradreuxi）和南极无翅拟步行虫（Paractoradreuxi）的摄氧量。来自南格鲁吉亚，位于南极极锋内，在这些昆虫在其微生境中所经历的温度范围内，两种拟蝎蛉幼虫的对数代谢率对温度的斜率没有差异，但拟蝎蛉成虫的对数代谢率对温度的回归斜率较陡。在P.因此，在白僵菌中没有发现代谢性冷适应。胸骨后纵弓德鲁西。然而，一些证据表明，温度补偿在A。发现了truncipennis，尽管这不能被认为是一种适应。Paractoraesterna是一种有翅的昆虫，其对温度的敏感性与幼虫相似，这可能有助于资源定位，从而提高适合度。另一方面，在P. dreuxi可能使热敏感性降低，这可能意味着在较高温度下呼吸水分损失减少。
Oxygen uptake ofParactora dreuxi(apterous) from Marion Island, which lies to the north of the Antarctic Polar Front, was compared to that ofP. trichosterna(macropterous) andAntrops truncipennis(apterous) from South Georgia, which lies within the Antarctic Polar Front, over the range of temperatures experienced by these insects in their microhabitats. No differences in the slopes of log metabolic rate on temperature were found between the larvae of the twoParactoraspecies, but the slope of the regression of log metabolic rate on temperature was steeper in the adults ofP. trichosternathan in those ofP. dreuxi.Therefore, metabolic cold adaptation was not found inP. trichosternacompared toP. dreuxi. However, some evidence for temperature compensation inA. truncipenniswas found, although this could not be considered an adaptation. The difference in the thermal sensitivity of metabolic rate of the adults of theParactoraspecies is ascribed to differences in their life history strategies.Paractora trichosternais a winged species in which retention of a thermal sensitivity similar to that of its larvae may facilitate resource location and so enhance fitness. On the other hand, the loss of flight inP. dreuximay have allowed a reduction in thermal sensitivity that could mean a reduction in respiratory water loss at higher temperatures.