Locomotor development in the Svalbard rock ptarmigan (Lagopus muta hyperborea)
Locomotor development in the Svalbard rock ptarmigan (Lagopus muta hyperborea)
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DOI：
10.1007/s00300-011-1131-x
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发表时间：
2012-06-01
期刊：
影响因子：
1.7
通讯作者：
Codd, Jonathan R.
中科院分区：
文献类型：
--
作者：
Lees, John J.;Stokkan, Karl-Arne;Codd, Jonathan R.
幼年动物经常遭受高水平的捕食。因此，开发有效且高效的运动系统对于确保它们的生存可能至关重要。然而，我们对运动效率的理解，至少在年轻动物的能量消耗方面是贫乏的。我们进行这项研究作为斯瓦尔巴特群岛岩雷鸟，Lagopus穆塔hyperborea必须迅速发展的能力，在他们的第一个冬天开始之前，在此期间的条件是极端的。为了生存，成年松鸡存款大的冬季脂肪储存，而在同一时间男性表现出减少运动的代谢成本。然而，亚成年雄性在第一个冬天无法完全获得脂肪储存，它们的运动系统的成熟度也是未知的。在这里，我们调查的能量学和运动学的陆地运动在亚成年雄性鸟类使用流通呼吸和高速录像，分别。我们证明，在运行速度和代谢成本方面，亚成年雷鸟在冬季来临之前发展了一个成熟的运动系统。这项研究表明，实现一个成熟的运动系统，使年轻的男性从冬季出现的能力，竞争的领土和配偶在繁殖季节。
Juvenile animals often suffer from high levels of predation. Development of an effective and efficient locomotor system is therefore likely to be crucial towards ensuring their survival. However, our understanding of locomotor efficiency, at least in terms of energetic cost in young animals is poor. We performed this study as Svalbard rock ptarmigan, Lagopus muta hyperborea must rapidly develop the ability to locomote prior to the onset of their first winter, during which conditions are extreme. To aid survival, adult ptarmigan deposit large winter fat stores, whilst at the same time males exhibit a reduced metabolic cost of locomotion. Sub-adult males, however, are unable to fully acquire fat stores during their first winter and the maturity of their locomotor systems is unknown. Here, we investigate the energetics and kinematics of terrestrial locomotion in sub-adult male birds using flow-through respirometry and high-speed video recordings, respectively. We demonstrate that in terms of running speed and metabolic cost, sub-adult ptarmigan develop a mature functioning locomotor system prior to the onset of winter. This research indicates that achieving a mature locomotor system allows young males to emerge from the winter with the ability to compete for territories and mates during the breeding season.