Pfeiffer P, Culik B M
Abteilung Meereszoologie, Universität Kiel, Germany.
J Comp Physiol B. 1998 Mar;168(2):143-8. doi: 10.1007/s003600050130.
We used a still-water swim channel in conjunction with open-flow oxygen and carbon dioxide respirometry to examine the energy requirements of river-otters (Lutra lutra L.) swimming voluntarily underwater in Neumünster Zoo (Germany). While at rest on land (5 degrees C), river-otters had a respiratory quotient of 0.77 and a resting metabolic rate of 4.1 W kg-1. This increased to an estimated 6.4 W kg-1 during rest in water (11-15 degrees C) and to 12.3 W kg-1 when the animals were feeding in the channel. River-otters swimming under water preferred a mean speed of 0.89 m s-1, and their energy requirements attained 11.6 W kg-1. Cost of transport, however, was minimal at 1.3 m s-1 and amounted to 0.95 J N-1 m-1.
我们在德国新明斯特动物园使用了一个静水游泳通道，并结合开放流氧气和二氧化碳呼吸测定法，来研究水獭（Lutra lutra L.）在水下自主游泳时的能量需求。当水獭在陆地上休息时（5摄氏度），其呼吸商为0.77，静息代谢率为4.1瓦/千克。在水中休息时（11 - 15摄氏度），这一数值增加到约6.4瓦/千克，而当动物在通道中进食时则增加到12.3瓦/千克。水獭在水下游泳时偏好的平均速度为0.89米/秒，此时它们的能量需求达到11.6瓦/千克。然而，运输成本在1.3米/秒时最低，为0.95焦耳/牛顿·米。
