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Sci Rep:韩国学者描绘企鹅叫声的功能

摘要 : 2017年8月17日,国际学术权威刊物自然出版集团旗下子刊《Scientific Reports》杂志在线发表了韩国极地研究所Won Young Lee研究员的一篇研究论文,论文描述了巴布亚企鹅在海洋的鸣叫行为及这些叫声的功能。

2017年8月17日,国际学术权威刊物自然出版集团旗下子刊《Scientific Reports》杂志在线发表了韩国极地研究所Won Young Lee研究员的一篇研究论文,论文描述了巴布亚企鹅在海洋的鸣叫行为及这些叫声的功能。

巴布亚企鹅生活在次南极岛屿和南极洲地区,习惯群体捕猎,主要以磷虾和鱼类为食。然而,研究人员很难接近企鹅的外海觅食地,因此对觅食时企鹅叫声的研究一直被搁置。

Won Young Lee和同事用动物摄像机,拍摄到南极乔治王岛的巴布亚企鹅在两个繁殖季节(2014至2015年和2015至2016年)的觅食行为。研究人员搜集了10只企鹅的598次近海呼叫,并分析了这些叫声的声学特征和行为情境。

结果发现在近一半的叫声中,这些企鹅在听到近海呼叫的1分钟内立即聚集成群。企鹅没有在发出近海呼叫前后表现出潜水觅食比例或猎物捕获率上的差异。这或许表明叫声与集体联系而非食物有关。

然而,研究人员观察到,在发出近海呼叫后,企鹅每次潜水的深度更浅、距离更短,而且它们游到一个新的地点而非在老地方逗留。作者猜想,企鹅在觅食过程中用声音交流可能是为了召集群体。Lee和同事提出,要更好地理解这些企鹅的水中生活,必须做更深入研究。

原文链接:

Group association and vocal behaviour during foraging trips in Gentoo penguins

原文摘要:

In contrast to their terrestrial call, the offshore call of penguins during their foraging trips has been poorly studied due to the inaccessibility of the foraging site—the open ocean—to researchers. Here, we present the first description of the vocal behaviour of penguins in the open ocean and discuss the function of their vocal communication. We deployed an animal-borne camera on gentoo penguins (Pygoscelis papua) and recorded their foraging behaviour during chick guarding. From the video recordings, we collected 598 offshore calls from 10 individuals in two breeding seasons (2014–2015 and 2015–2016), and we analysed the acoustic characteristics and behavioural contexts of these calls, including diving patterns, group association events, and foraging behaviour. The offshore calls varied in their dominant frequency and length, and penguins produced calls of different lengths in succession. Group associations were observed within one minute following an offshore call in almost half of the instances (43.18%). Penguins undertook dives of shallower depths and shorter durations after producing an offshore call than those before producing an offshore call. Our findings show that penguins may use vocal communication in the ocean related with group association during foraging trips.

来源: Scientific Reports 浏览次数:0

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