Author's Organization：Department of Biology, College of Arts and Sciences, The University of Tokyo Zoological Institute, Faculty of Science, The University of Tokyo Department of Biology, College of Arts and Sciences, The University of Tokyo
Published: May 25, 1995Received: November 04, 1994Available on J-STAGE: February 07, 2008Accepted: February 10, 1995
Advance online publication: -
Revised: -
