家兔窝仔体温调节发育的个体差异

IF 2.9 2区 生物学 Q2 BIOLOGY
Yesenia Fernández , Heiko G. Rödel , Christophe Féron , Verónica Reyes-Meza , Robyn Hudson , Amando Bautista
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引用次数: 0

摘要

在恒温动物中,严密的体温调节是维持体内平衡的必要条件。然而,初生的晚生哺乳动物独立维持体温的能力有限,因为它们通常没有皮毛的绝缘层,它们的体表体积比相对较大,并且它们的血管收缩控制能力不成熟。因此,晚育幼崽在出生时通常被认为是变温的变温动物,但很快就会发展成恒温动物。然而,在多胎物种中,我们不知道在恒温动物的时间发育中,不同的窝伴之间是否存在差异,如果有的话,这可能是什么原因。我们的目的是确定窝内同伴之间的相互作用对家兔晚育幼崽恒温恒温发生的可能的个体差异的贡献。在10窝幼崽中,我们评估了幼崽在窝群中位置的个体差异,以及它们在出生后15天内单独暴露于急性每日寒冷挑战时保持稳定体温的能力的差异。出生时相对体重越大,体重增加越多,在窝群中占据中心位置,皮毛生长越快,这些都与恒温恒温动物的早期发展有关。我们的结论是,幼崽之间的早期互动与初始体重的相对差异有关,导致了恒温动物发育的个体差异,并可能对个体的健康和代谢表型产生长期影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Individual differences in the development of thermoregulation among littermates of the domestic rabbit
The tight regulation of body temperature is essential for the maintenance of homeostasis in homeothermic endotherms. However, newborn altricial mammals are limited in their ability to maintain body temperature independently because they usually lack an insulating layer of fur, they have a relatively large body surface to volume ratio, and they have immature vasomotor control. Thus, altricial young are generally considered ectothermic poikilotherms at birth, but rapidly develop homeothermic endothermy. However, in polytocous species it is not known whether there are differences among littermates in the temporal development of endothermy and if so, what might account for this. Our aim was to determine the contribution of interactions among littermates to possible individual differences in the onset of homeothermic endothermy in altricial pups of the domestic rabbit. In 10 litters we evaluated individual differences in pups' position within the litter huddle on differences in their ability to maintain a stable body temperature when exposed individually to an acute daily cold challenge across the first 15 postnatal days. Greater relative body mass at birth was associated with greater body mass gain, occupancy of central positions in the litter huddle, and more rapid growth of fur, which together were associated with the earlier development of homeothermic endothermy. We conclude that early interactions among littermates associated with relative differences in initial body mass contribute to individual differences in the development of endothermy, with possible long-term consequences for individuals’ fitness and metabolic phenotype.
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来源期刊
Journal of thermal biology
Journal of thermal biology 生物-动物学
CiteScore
5.30
自引率
7.40%
发文量
196
审稿时长
14.5 weeks
期刊介绍: The Journal of Thermal Biology publishes articles that advance our knowledge on the ways and mechanisms through which temperature affects man and animals. This includes studies of their responses to these effects and on the ecological consequences. Directly relevant to this theme are: • The mechanisms of thermal limitation, heat and cold injury, and the resistance of organisms to extremes of temperature • The mechanisms involved in acclimation, acclimatization and evolutionary adaptation to temperature • Mechanisms underlying the patterns of hibernation, torpor, dormancy, aestivation and diapause • Effects of temperature on reproduction and development, growth, ageing and life-span • Studies on modelling heat transfer between organisms and their environment • The contributions of temperature to effects of climate change on animal species and man • Studies of conservation biology and physiology related to temperature • Behavioural and physiological regulation of body temperature including its pathophysiology and fever • Medical applications of hypo- and hyperthermia Article types: • Original articles • Review articles
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