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首页> 外文期刊>日本水産学会誌 >Propulsive force generated by flipper beat of sea turtles
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Propulsive force generated by flipper beat of sea turtles

机译：海龟脚蹼跳动产生的推进力

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摘要

Propulsive force generated by flipper beat of sea turtles was evaluated to confirm the design adequacy of a flap door covering the outlet in a sea turtle releasing device (TRD) for large-scale set nets. The force generated by flipper beat was measured by a tension meter using nine green turtles (SSCL: 0.39-0.72 m) and four loggerhead turtles (0.63-0.84 m) in a water tank (10 m x 10 m x 2.1 m depth). Video recording was simultaneously conducted and time-series data of flipper beats were obtained. Sea turtles alternated a set of flipper beats with a rest. The average of peak force values and flipper beat frequencies in a set of flipper beats decreased in order of each set for both species. Both the force and beat frequency of green turtles were twice as large as those of loggerhead turtles, and the impulse values of a single beat were similar between the two species. There was a strong linear relationship between peak force value and turtle body size in the first set, but there was no significant relationship after thirty minutes later for both species. Even after 30 minutes and later, the generated force was still large (>40 N) enough to open the flap door of the current TRD.
机译：评估了由海龟的脚拍打产生的推进力，以确认覆盖大型固定网的海龟释放装置（TRD）中的出口的翻板门的设计适当性。蛙鞋拍打产生的力由张力计在水箱（10 m x 10 m x 2.1 m深度）中用九只绿海龟（SSCL：0.39-0.72 m）和四只海龟（0.63-0.84 m）测量。同时进行视频记录，并获得蛙脚拍的时间序列数据。海龟休息时交替进行一组脚蹼跳动。一组蛙鞋拍的峰值力值和蛙鞋拍频率的平均值按两个物种的每组顺序降低。绿海龟的力和搏动频率都比logger海龟大两倍，并且单个跳动的冲动值在两个物种之间相似。在第一组中，峰值力值与龟体大小之间存在很强的线性关系，但是在30分钟后，这两个物种之间都没有显着的关系。即使在30分钟之后，产生的力仍然足够大（> 40 N），足以打开当前TRD的翻板门。

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