Lowell W R
Scripps Institution of Oceanography, University of California, San Diego, La Jolla 92093.
Exp Biol. 1990;48(6):349-55.
Oxygen consumption rates (VO2) were measured for painted turtles (Chrysemys picta) swimming in a respirometer at controlled speeds. Sustained specific swimming speeds ranged from 0.75 to 1.52 body lengths (L) per s. Over most of this range endurance exceeded 30 min. VO2 increased curvillinearly with swimming speed (U) and the maximum active rate was 9 times resting (0.26 ml O2/min), and 3 times routine (0.64 ml O2/min). Mass specific metabolic scope was 228 ml O2/(kg.h), similar to that reported for other active chelonians. Cost of transport increased from 3.86 to 5.72 J/(kg.m) over the speed range tested. Swimming costs for rowing painted turtles are greater than those for marine reptiles utilizing anguilliform or lift-producing hydrofoil propulsion. The increased swimming cost for the amphibious painted turtle suggests that morphological specializations permitting effective terrestrial transport, increase energetic expenditures during swimming.
在呼吸仪中，以控制的速度测量了彩绘龟（锦龟）游泳时的耗氧率（VO2）。持续的特定游泳速度范围为每秒0.75至1.52个体长（L）。在这个范围的大部分情况下，耐力超过30分钟。VO2随着游泳速度（U）呈曲线增加，最大活动率是静息时的9倍（0.26毫升氧气/分钟），是日常活动时的3倍（0.64毫升氧气/分钟）。质量比代谢范围为228毫升氧气/（千克·小时），与其他活跃龟类的报道相似。在所测试的速度范围内，运输成本从3.86增加到5.72焦耳/（千克·米）。划水的彩绘龟的游泳成本高于利用鳗形或产生升力的水翼推进的海洋爬行动物。两栖彩绘龟增加的游泳成本表明，允许有效陆地运输的形态特化增加了游泳时的能量消耗。
