Flipper strokes can predict energy expenditure and locomotion costs in free-ranging northern and Antarctic fur seals.
Flipper strokes can predict energy expenditure and locomotion costs in free-ranging northern and Antarctic fur seals.
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DOI：
10.1038/srep33912
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发表时间：
2016-09-23
影响因子：
4.6
通讯作者：
Guinet C
中科院分区：
文献类型：
--
作者：
Jeanniard-du-Dot T;Trites AW;Arnould JP;Speakman JR;Guinet C
鳍状肢划动被提议作为估算海洋脊椎动物在海上觅食时消耗的能量的替代品，但这从未在自由放养的otariids（海狗和海狮）上得到验证。我们的目标是调查如何以及鳍状肢中风与能量消耗的33觅食北方和南极软毛海豹配备加速度计，GPS和时间深度记录仪。我们同时测量现场代谢率与双标记水的方法和派生的活动特定的能量消耗使用精细尺度的时间活动预算为每个密封。鳍状肢中风检测，而潜水或表面过境使用动态加速度。尽管在鳍状肢划动动力学或频率方面存在一些种间差异，但两种海狗在潜水时每次划动花费3.79 ± 0.39 J/kg，运输成本约为1.6-1.9 J/kg/m。此外，鳍状肢中风计数是很好的预测能源消耗潜水（R2 = 0.76），并在较小程度上，而过境（R2 = 0.63）。然而，鳍状肢中风计数是一个穷人的预测整体的总能量消耗在一个完整的觅食之旅（R2 = 0.50）。鳍板冲程的幅度（即，加速度幅值×划动次数）预测总能量消耗（R2 = 0.63）优于脚蹼划动次数，但不如其他基于加速度的代理（即整体动态身体加速度）准确。
Flipper strokes have been proposed as proxies to estimate the energy expended by marine vertebrates while foraging at sea, but this has never been validated on free-ranging otariids (fur seals and sea lions). Our goal was to investigate how well flipper strokes correlate with energy expenditure in 33 foraging northern and Antarctic fur seals equipped with accelerometers, GPS, and time-depth recorders. We concomitantly measured field metabolic rates with the doubly-labelled water method and derived activity-specific energy expenditures using fine-scale time-activity budgets for each seal. Flipper strokes were detected while diving or surface transiting using dynamic acceleration. Despite some inter-species differences in flipper stroke dynamics or frequencies, both species of fur seals spent 3.79 ± 0.39 J/kg per stroke and had a cost of transport of ~1.6–1.9 J/kg/m while diving. Also, flipper stroke counts were good predictors of energy spent while diving (R2 = 0.76) and to a lesser extent while transiting (R2 = 0.63). However, flipper stroke count was a poor predictor overall of total energy spent during a full foraging trip (R2 = 0.50). Amplitude of flipper strokes (i.e., acceleration amplitude × number of strokes) predicted total energy expenditure (R2 = 0.63) better than flipper stroke counts, but was not as accurate as other acceleration-based proxies, i.e. Overall Dynamic Body Acceleration.
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影响因子：
3.7
作者：
Dudley PN;Bonazza R;Jones TT;Wyneken J;Porter WP
通讯作者：
Porter WP
DOI：
10.1016/j.jembe.2012.07.001
发表时间：
2012-11-30
影响因子：
2
作者：
Dassis, M.;Rodriguez, D. H.;Davis, R. W.
通讯作者：
Davis, R. W.
DOI：
10.1086/physzool.61.2.30156147
发表时间：
1988-03-01
期刊：
PHYSIOLOGICAL ZOOLOGY
影响因子：
--
作者：
COSTA, DP;TRILLMICH, F
通讯作者：
TRILLMICH, F
影响因子：
1.4
作者：
Fahlman, Andreas;Wilson, Rory;Trites, Andrew W.
通讯作者：
Trites, Andrew W.
影响因子：
5.2
作者：
BOYD, IL;WOAKES, AJ;WILLIAMS, TM
通讯作者：
WILLIAMS, TM