冰川湾国家公园和保护区内靠近陆地栖息地的港海豹繁殖叫声的声源水平和叫声参数。

Source levels and call parameters of harbor seal breeding vocalizations near a terrestrial haulout site in Glacier Bay National Park and Preserve.

作者信息

Matthews Leanna P, Parks Susan E, Fournet Michelle E H, Gabriele Christine M, Womble Jamie N, Klinck Holger

机构信息

Biology Department, Syracuse University, Syracuse, New York 13244, USA

Department of Fisheries and Wildlife, Oregon State University, Corvallis, Oregon 97331, USA

出版信息

J Acoust Soc Am. 2017 Mar;141(3):EL274. doi: 10.1121/1.4978299.

DOI:10.1121/1.4978299

PMID:28372144

Abstract

Source levels of harbor seal breeding vocalizations were estimated using a three-element planar hydrophone array near the Beardslee Islands in Glacier Bay National Park and Preserve, Alaska. The average source level for these calls was 144 dB re 1 μPa at 1 m in the 40-500 Hz frequency band. Source level estimates ranged from 129 to 149 dB re 1 μPa. Four call parameters, including minimum frequency, peak frequency, total duration, and pulse duration, were also measured. These measurements indicated that breeding vocalizations of harbor seals near the Beardslee Islands of Glacier Bay National Park are similar in duration (average total duration: 4.8 s, average pulse duration: 3.0 s) to previously reported values from other populations, but are 170-220 Hz lower in average minimum frequency (78 Hz).

摘要

在阿拉斯加冰川湾国家公园和保护区的比尔兹利群岛附近，使用一个三元件平面水听器阵列估计了斑海豹繁殖期发声的声源级。在40 - 500赫兹频段内，这些叫声在1米处的平均声源级为相对于1微帕144分贝。声源级估计值范围为相对于1微帕129至149分贝。还测量了四个叫声参数，包括最低频率、峰值频率、总时长和脉冲时长。这些测量结果表明，冰川湾国家公园比尔兹利群岛附近斑海豹的繁殖期叫声在时长方面（平均总时长：4.8秒，平均脉冲时长：3.0秒）与先前报道的其他种群的值相似，但平均最低频率低170 - 220赫兹（78赫兹）。