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Subject: walruses
From: "hirtropla" <>
Date: Fri, 26 Apr 2002 17:02:35 -0000
Today I visited the aquarium in Otaru,Hokkaido,Japan.They had a 
female walrus in a large glass walled cage.The walrus kept repeating 
the same call(audible through the glass),the first part a high 
pitched varying screech,the second a periodic lower pitched tone and 
finally a very low frequency single drone(this could be felt directly 
through the glass).The last part reminded me of running a 20hz sine 
tone through my speakers(not that they can reproduce it 
accurately!!).Does anyone know how low a walrus call goes?I thought 
this might tie in with the infrasound discussion.How about 
alternative calls?I know nothing of sea mammal calls so any 
information would be of great interest.A lurker,Richard,Sapporo,Japan.


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