Differences in the whistle characteristics and repertoire of Bottlenose and Spinner Dolphins.
Differences in the whistle characteristics and repertoire of Bottlenose and Spinner Dolphins.
复制标题
宽吻海豚和飞旋海豚的口哨特征和曲目的差异。
DOI：
10.1590/s0001-37652004000200030
复制
发表时间：
2004
影响因子：
1.3
通讯作者：
C. Bazúa
中科院分区：
文献类型：
--
作者：
C. Bazúa
有几种方法被用来比较海豚发出的哨声。研究中使用的两种方法是：(1)将哨声轮廓分类为六类(即恒频、上扫、下扫、凹、凸和正弦)；(2)从每个哨声轮廓中提取频率和时间参数。当使用判别函数分析比较六个类别中每一个类别的哨声轮廓分布以及哨声频率和时间参数时，以相同的方式描述宽吻海豚Tursioptruncatus哨声。对于旋转的海豚Stenella long girostris哨声，每种方法描述的哨声都不同。有几个事实可以解释在描述海豚哨声时的这些差异，例如，与宽吻海豚组相比，旋转海豚组的流动性更大；宽吻海豚的哨声比旋转海豚组的哨声有更大的地理差异；与宽吻海豚的不同关系相比，旋转海豚哨的平均开始频率比平均结束频率低16%；在旋转海豚哨研究中用来定义哨子轮廓类别的标准比宽吻海豚哨研究中用来定义哨子轮廓类别的标准更严格。
Several methods have been used to compare the whistles produced by dolphins. The two methods used in this study are: (1) a classification of whistle contours in six categories (i.e. constant frequency, upsweep, downsweep, concave, convex, and sine) and (2) the extraction of frequency and time parameters from each whistle contour. Bottlenose Dolphin Tursiops truncatus whistles are described in the same way when comparing whistle contour distributions in each of the six categories and whistle frequency and time parameters using Discriminant Function Analysis. For Spinner Dolphin Stenella longirostris whistles, each method describes whistles differently. Several facts may explain these differences in describing dolphin whistles, such as a greater fluidity of Spinner Dolphin groups when compared to Bottlenose Dolphin groups, greater geographic variation in the whistles of Bottlenose Dolphins than in those of Spinner Dolphins, an average beginning frequency 16% lower than the average ending frequency in Spinner Dolphin whistles compared to a varied relationship for Bottlenose Dolphins, and stricter criteria used to define whistle contour categories in the study of Spinner Dolphin whistles than in the Bottlenose Dolphin whistle study.