コンテンツメニュー

Imai Chifumi


Otolith Sr : Ca ratios of an endangered cyprinid Tribolodon nakamurai indicating absence of sea-migrating traits

Journal of National Fisheries University Volume 57 Issue 2 Page 137-141
published_at 2008-12
57-2-137-141.pdf
[fulltext] 548 KB
Title
コイ科の希少種ウケクチウグイの耳石Sr:Ca比解析による河川型生活史の検証
Otolith Sr : Ca ratios of an endangered cyprinid Tribolodon nakamurai indicating absence of sea-migrating traits
Creators Imai Chifumi
Creators Sakai Harumi
Creators Arai Takaomi
Source Identifiers [PISSN] 0370-9361
Creator Keywords
Endangered fish Cyprinidae Tribolodon nakamurai Migration Otolith Sr : Ca ratios
The strontium : calcium concentration ratios in the otoliths of ten variously-sized Tribolodon nakamurai (Cyprinidae) individuals collected from the lower reaches of the Mogami River were examined and compared with those of six spawning individuals from the upper reaches of the river in order to establish the existence or otherwise of any sea-migrating traits. The ratios were relatively stable from the core to the edge of the otolith in all specimens, indicating a solely freshwater life style. Any conservation program for T. nakamurai should therefore be based on the premise that the species has a fluvial mode of life.
Languages eng
Resource Type departmental bulletin paper
Publishers National Fisheries University
Date Issued 2008-12
File Version Version of Record
Access Rights open access
Relations
[ISSN]0370-9361