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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Gulps, wheezes, and sniffs: how measurement of beak movement in sea turtles can elucidate their behaviour and ecology
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Gulps, wheezes, and sniffs: how measurement of beak movement in sea turtles can elucidate their behaviour and ecology

机译：吞咽，喘息和嗅探：测量海龟的喙运动如何阐明其行为和生态

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This study was performed to assess the extent to which an intermandibular angle sensor (IMASEN) may be used to elucidate the behaviour of six captive loggerhead turtles. The measuring system was glued to the beak of turtles and set to measure the intermandibular distance at 5 Hz while the turtles fed (on anchovies, squid, and live crabs), swam, rested, and breathed. The behaviour of the equipped turtles was filmed and compared afterwards to the sensor readings. The IMASEN output data allowed quantification of the number of food items ingested as well as the time between food seizure and deglutition and the type of food ingested. However, nonfeeding turtles exhibited regular jaw movements with a reduced amplitude of ca. 2.2 mm, which clearly differed from feeding movements and were caused by buccal oscillations. Such movements of the base of the buccal cavity generate a steady flow of water pass the chemosensory organs and were interrupted only during food ingestion, resting, and breathing. Breathing was clearly distinguishable by the IMASEN. The beak sensor is thus a reliable system to investigate a number of behaviours in sea turtles which encompass foraging, buccal oscillation, and respiratory frequency. It has potential for allocating time to different activities in free-ranging sea turtles and thus allows us to gain insight to their foraging and diving strategies.
机译：进行这项研究的目的是评估可使用下颌间角度传感器（IMASEN）阐明六只cap牛的行为的程度。将测量系统粘在海龟的喙上，并设置为以5 Hz的频率测量胫骨之间的距离，同时给海龟喂食（在an鱼，鱿鱼和活蟹上），游泳，休息和呼吸。拍摄装备好的海龟的行为，然后与传感器读数进行比较。 IMASEN的输出数据可以量化摄入食物的数量，以及食物没收和脱胶之间的时间以及摄入食物的类型。然而，不喂食的乌龟表现出规律的颚运动，振幅降低了大约。 2.2 mm，明显不同于进食运动，是由颊部振荡引起的。颊腔底部的这种运动产生了稳定的水流，流经化学感觉器官，并且仅在食物摄入，休息和呼吸期间被中断。 IMASEN可以清楚地区分呼吸。因此，喙传感器是一种可靠的系统，可用于研究海龟中的多种行为，包括觅食，口腔振荡和呼吸频率。它有可能为自由放养的海龟分配时间用于不同的活动，因此使我们能够了解它们的觅食和潜水策略。

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