ECHOLOCATION RATES OF TWO HARBOR PORPOISES ( PHOCOENA PHOCOENA)

A bstract The rate of occurrence of click trains of two harbor porpoises ( Phocoena phocoena ) were counted during 14 nights. We developed an echolocation signal detection system that was harnessed to a porpoise and activated a light when the animal emitted an echolocation signal. This device, refer...

Full description

Bibliographic Details
Published in:Marine Mammal Science
Main Authors: Akamatsu, Tomonari, Hatakeyama, Yoshimi, Kojima, Takahito, Soeda, Hideo
Format: Article in Journal/Newspaper
Language:English
Published: Wiley 1994
Subjects:
Phocoena phocoena
Online Access:http://dx.doi.org/10.1111/j.1748-7692.1994.tb00497.x
https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1748-7692.1994.tb00497.x
https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1748-7692.1994.tb00497.x
Description
Summary:A bstract The rate of occurrence of click trains of two harbor porpoises ( Phocoena phocoena ) were counted during 14 nights. We developed an echolocation signal detection system that was harnessed to a porpoise and activated a light when the animal emitted an echolocation signal. This device, referred to as a click‐light, detects echolocation signals above 150 dB re 1 μPa in the 28–180 kHz range. Echolocation rates, i.e., occurrences of click trains, changed frequently, ranging from 0 to 25 per minute. Echolocation rates were affected by feeding, individual difference, and enclosure type such as the net enclosure and the pool. The porpoise echolocation rates seemed to show acclimation.

Similar Items