Seasonal differences in jump performance in the Svalbard rock ptarmigan (Lagopus muta hyperborea).
Seasonal differences in jump performance in the Svalbard rock ptarmigan (Lagopus muta hyperborea).
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DOI：
10.1242/bio.20147930
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发表时间：
2014-04-15
期刊：
影响因子：
2.4
通讯作者：
Nudds RL
中科院分区：
文献类型：
--
作者：
Lees JJ;Folkow LP;Codd JR;Nudds RL
脂肪储存对许多鸟类的生存至关重要，提供能量储备，但可能对运动性能产生影响，并可能增加捕食风险。特别是，通过跳跃启动飞行的能力是至关重要的捕食者回避，并可能受到身体质量（Mb）的变化。在这里，我们调查高北极斯瓦尔巴特群岛岩雷鸟（Lagopus穆塔hyperborea）的跳跃起飞性能的季节性差异，导致约50%的Mb增加，在冬季作为脂肪沉积的结果。使用测力板数据和录像，我们发现，在没有改变起飞角度，冬季斯瓦尔巴特群岛岩雷鸟无法增加后肢功率输出跳跃过程中，以弥补其增加Mb。其结果是，峰值起飞速度降低了42%，跳跃持续时间也延长了冬季。鉴于斯瓦尔巴雷鸟在这个季节被捕食的风险较低，冬季跳跃能力下降对它们的影响可能相对较小。然而，这可能是，观察到的减少跳跃性能时，脂肪可能有助于在其他鸟类中观察到的次最大模式的脂肪收购。
Fat storage is essential to the survival of many bird species, providing energy reserves, but can have an effect on locomotor performance with an associated potential increase in predation risk. In particular, the ability to initiate flight through jumping is critical to predator avoidance and may be influenced by changes in body mass (Mb). Here we investigate seasonal differences in the jump take-off performance of high Arctic Svalbard rock ptarmigan (Lagopus muta hyperborea) resulting from around a 50% increase in Mb during winter as a result of fat deposition. Using force-plate data and videography, we reveal that, in the absence of alterations to take-off angle, winter Svalbard rock ptarmigan are unable to increase hind-limb power output during jumping to compensate for their increased Mb. As a result, peak take-off velocity is reduced by 42% and jump duration is also extended during winter. The consequences of reduced jumping performance upon Svalbard ptarmigan during winter may be relatively small given their low risk of predation during this season. It may be, however, that the observed reduction in jumping performance when fat may contribute to the sub-maximal pattern of fat acquisition observed in other bird species.
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影响因子：
3.7
作者：
Lees J;Nudds R;Stokkan KA;Folkow L;Codd J
通讯作者：
Codd J
影响因子：
4.8
作者：
LIMA, SL
通讯作者：
LIMA, SL
影响因子：
64.8
作者：
GOSLER, AG;GREENWOOD, JJD;PERRINS, C
通讯作者：
PERRINS, C
DOI：
10.1098/rspb.1996.0244
发表时间：
1996-12-22
影响因子：
4.7
作者：
Kullberg, C;Fransson, T;Jakobsson, S
通讯作者：
Jakobsson, S
影响因子：
2.3
作者：
Lind, J;Fransson, T;Kullberg, C
通讯作者：
Kullberg, C