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Use of otolith microchemistry to estimate the migratory history of the Russian sturgeon, Acipenser guldenstadti

Published online by Cambridge University Press:  05 September 2001

Takaomi Arai  and
Nobuyuki Miyazaki
Takaomi Arai
Affiliation:
Otsuchi Marine Research Center, Ocean Research Institute, The University of Tokyo, 2-106-1, Akahama, Otsuchi, Iwate 028-1102, Japan, E-mail: arai@wakame.ori.u-tokyo.ac.jp
Nobuyuki Miyazaki
Affiliation:
Otsuchi Marine Research Center, Ocean Research Institute, The University of Tokyo, 2-106-1, Akahama, Otsuchi, Iwate 028-1102, Japan, E-mail: arai@wakame.ori.u-tokyo.ac.jp
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Abstract

Ontogenic change patterns in otolith Sr:Ca ratios were examined in the Russian sturgeon, Acipenser guldenstadti in the Caspian Sea. Otolith Sr:Ca ratios fluctuated widely during the life history in accordance with the migration pattern from freshwater to brackish water habitats, i.e. all specimens exhibited a typical anadromous pattern in the ratio. Several specimens had two transition points in otolith Sr:Ca ratios from the low ratios to the high indicating that those specimens had a flexible migration strategy in the ambient water and had the possibility of migrating downstream to the Caspian Sea multiple times after spawning in a freshwater habitat.

Type
Short Communication
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 81 , Issue 4 , August 2001 , pp. 709 - 710
Copyright
2001 Marine Biological Association of the United Kingdom

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