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Environmental habitat use and migration of Plecoglossidae and Osmeridae fish

Published online by Cambridge University Press:  14 May 2008

Madoka Ohji ,
Aya Kotake  and
Takaomi Arai
Madoka Ohji*
Affiliation:
Institute of Symbiotic Science and Technology, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509, Japan
Aya Kotake
Affiliation:
Ocean Research Institute, The University of Tokyo, 1-15-1, Minamidai, Nakano, Tokyo 164-8639, Japan
Takaomi Arai
Affiliation:
International Coastal Research Center, Ocean Research Institute, The University of Tokyo, 2-106-1, Akahama, Otsuchi, Iwate 028-1102, Japan
*
Correspondence should be addressed to: Madoka Ohji Institute of Symbiotic Science and TechnologyTokyo University of Agriculture and Technology FuchuTokyo 183-8509Japan email: [email protected]
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Abstract

The life histories of Plecoglossidae and Osmeridae fish collected from Japanese fresh, brackish, and seawaters were studied by examining the strontium (Sr) to calcium (Ca) ratios in their otoliths. The Sr:Ca ratios in the otoliths changed with the salinity of the habitat. The fish living in a freshwater environment showed consistently low Sr:Ca ratios throughout the otolith. The fish were identified as a standard freshwater type. In contrast, fish collected from the intertidal zone showed higher otolith Sr:Ca ratios than those in the standard freshwater type, and the ratios fluctuated along the growth phase. In the present study, in addition to the representative migration pattern reported previously, other migration patterns were found to show consistently high Sr:Ca ratios throughout the otolith in several Osmeridae fish. Those results indicate that these fish have a flexible migration strategy with a high degree of behavioural plasticity and an ability to utilize the full range of salinity throughout their life history.

Keywords

smaltsoyuotolithmigrationenvironmental habitat use
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 88 , Issue 3 , May 2008 , pp. 637 - 640
Copyright
Copyright © Marine Biological Association of the United Kingdom 2008

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References

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