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
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
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