Acoustic research on Toninhas (Pontoporia blainvillei)
Report: Tadamichi MORISAKA
Date: 2012/2/24 - 2012/3/10
I went to the special part of the Babitonga bay in Santa Catalina State, Brazil by using a boat belonging to "Projeto
Toninhas" with the members of the project in almost every morning in order to take sounds from Toninha dolphins (Pontoporia blainvillei).
After finding a toninha group, I put a hydrophone array which consisted of e hydrophones and two miniature acoustic
data loggers (A-tag) under water, and recorded the sounds from dolphins.
I also recorded sounds from sympatric Guiana dolphins (Sotalia guianensis) for comparison.
I found dolphin groups during seven surveys and successfully recorded their sounds.
La Plata river dolphin keep
away from the ship.
Put the underwater microphone array.