Ionion University, Corfu, Greece.
Department of Zoology/Marine Biology, Faculty of Biology, School of Science, National and Kapodistrian University of Athens, Athens, Greece.
Adv Exp Med Biol. 2020;1194:127-134. doi: 10.1007/978-3-030-32622-7_11.
Scheduled scientific surveys are a valuable asset in beginning to understand the behavior and vocalization of free-ranging cetaceans. The fortuity of a nonscheduled survey has proven to be beneficial as well. In October 2003 a team of biologist oceanographers began a trip aboard a 44.29 feet catamaran sailing boat from Piraeus Greece to Cape Verde Archipelago intending to observe free-ranging cetaceans. Acoustic recordings were conducted using a towed stereophonic hydrophone array consisted of two Benthos AQ4 type hydrophones. Photographs were taken in order to ensure species identification. Information on vocalization administration during foraging of Lagenodelphis hosei and Steno bredanensis has been acquired. Calculation of ASPL (apparent source power level) revealed that dolphins' vocalizations did not match to usual vocalization activities. The relation of vocalization administration by dolphins with brain to mash ratio (BMR) is introduced as an additional predator's strategy.
计划性科学调查是了解自由放养鲸目动物行为和发声的宝贵资产。非计划性调查的偶然发现也被证明是有益的。2003 年 10 月，一组生物海洋学家乘坐一艘 44.29 英尺长的双体帆船从希腊比雷埃夫斯出发前往佛得角群岛，旨在观察自由放养的鲸目动物。使用由两个 Benthos AQ4 型水听器组成的拖曳式立体声水听器阵进行声记录。拍摄照片以确保物种识别。获得了关于长须鲸和斑纹海豚觅食时发声管理的信息。ASPL（明显声源级）的计算表明，海豚的叫声与通常的发声活动不匹配。将海豚发声管理与大脑与身体质量比（BMR）的关系引入作为额外的捕食者策略。
