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首页> 外文期刊>Polar biology >Critical thermal limits and their responses to acclimation in two sub-Antarctic spiders: Myro kerguelenensis and Prinerigone vagans
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Critical thermal limits and their responses to acclimation in two sub-Antarctic spiders: Myro kerguelenensis and Prinerigone vagans

机译：两种亚南极蜘蛛的临界温度极限及其对驯化的响应：Myro kerguelenensis和Prinerigone vagans

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摘要

Despite the relative richness of spider species across the Southern Ocean islands remarkably little information is available on their biology. Here, the critical thermal limits of an indigenous (Myro kerguelenensis, Desidae) and an introduced (Prinerigone vagans, Linyphiidae) spider species from Marion Island were studied after 7-8 days acclimation to 0, 5,10 and 15℃. Critical thermal minima (CT_(Min)) were low in these species by comparison with other spiders and insects measured to date, and ranged from —6 to —7℃ in M. kerguelenensis and from —7 to —8℃ in P. vagans. In contrast, critical thermal maxima (CT_(Max)) were similar to other insects on Marion Island (M. kerguelenensis: 35.0-35.6℃; P. vagans: 35.1-36.0℃), although significantly lower than those reported for other spider species in the literature. The magnitude of acclimation responses in CT_(Max) was lower than those in CT_(Min) for both species and this suggests decoupled responses to acclimation. Whilst not conclusive, the results raise several important considerations: that oxygen limitation of thermal tolerance needs to be more widely investigated in terrestrial species, that indigenous and alien species might differ in the nature and extent of their plasticity, and that upper and lower thermal tolerance limits might be decoupled in spiders as is the case in insects.
机译：尽管整个南大洋群岛的蜘蛛种类相对丰富，但关于其生物学的信息却很少。在此，研究了在7、8天适应0、5、10和15℃后，来自马里恩岛的本地（Myro kerguelenensis，Desidae）和引进的（Prinerigone vagans，Linyphiidae）蜘蛛的临界热极限。与迄今测得的其他蜘蛛和昆虫相比，这些物种的临界热极小值（CT_（Min））低，在克氏毛M中的温度范围为-6至-7℃，而在华氏P中的温度范围为-7至-8℃。 。相比之下，临界热极大值（CT_（Max））与马里恩岛上的其他昆虫相似（克格伦山毛虫：35.0-35.6℃；瓦格纳松：35.1-36.0℃），尽管明显低于其他蜘蛛物种的报道。在文学中。对于两个物种，CT_（Max）中的驯化响应幅度都低于CT_（Min）中的驯化响应幅度，这表明对驯化的解耦响应。尽管不是结论性的，但该结果提出了几个重要的考虑因素：需要进一步研究陆生物种对热耐受性的氧限制，土著和外来物种的可塑性性质和程度可能有所不同，以及热耐受性的上限和下限蜘蛛可能会像昆虫一样限制极限。

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