Age and growth of the Ajime-loach, Niwaella delicata, in the Yura River, Kyoto, Japan

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4 Citations (Scopus)

Abstract

The age of the Ajime-loach, Niwaella delicata (a species endemic to Japan) was determined from the number of concentric rings appearing on the cross-sectional surface of the erectile spine (peculiar to Cobitidae). The ages of loaches caught in the Yura River Kyoto, were determined and growth rates for each sex estimated. It was found that size dimorphism in this species was due to different growth patterns between the sexes 2.5 years old males being larger than females and usually sexually mature, unlike the latter. Females older than 3.5 years were sexually mature and larger than males of equivalent age.

Original languageEnglish
Pages (from-to)183-186
Number of pages4
JournalIchthyological Research
Volume47
Issue number2
DOIs
Publication statusPublished - May 25 2000
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics

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