Vocal noise compensation mechanisms in captive beluga whales: onset order and usage patterns

Cara Hotchkin, Penn State University

October 28, 2009 @ 01:20 pm to 02:10 pm

10 Tyson

Marine mammals in captivity are subject to a variety noises, from aquarium visitors and exhibit maintenance, nearby roadways, construction, and other sources. Little is known about how exposure to these sounds affects sound production and communication among captive cetaceans. This proposed dissertation project will examine the noise induced changes to vocalizations produced by captive beluga whales (Delphinapterus leucas)._ Using both existing noise sources and controllable playback experiments, I will investigate the types (frequency, amplitude, temporal) of compensation mechanism produced and in what order. This study will provide insight into communication among captive beluga whales, and may be a useful comparison to uncontrolled wild animal studies.