North Pacific Anadromous Fish Commission

Technical Report 17

Table of Contents

Development of Age Determination Technique Part 2: Image Processing for Age Determination Based on the Annuli of a Chum Salmon Scale

Authors: 
Masanobu Yoshida, Hiroyuki Shioya, Yasuyuki Miyakoshi, Fumi Yamaguch, and Hirokazu Urabe

Abstract Excerpt:
In recent years, the poor catch of chum salmon has continued in Japan, and research aimed at monitoring the stock status and elucidating the factors that cause fluctuations in stock has been attracting attention. It takes a lot of time to perform age-assessment work by hand. Information technology has been developed and used for solving various problems in engineering and science fields. Previous work on computerized age-determination has been completed (Endo et al. 1997; Mitani et al. 1988); however, the automation process was not established, and we need to solve the problem associated with huge salmon samples. We constructed new age-assessment technology using advanced image processing to automate the work for scale samples in order to contribute to the investigation of salmon return data in Hokkaido.

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DOI:
https://doi.org/10.23849/npafctr17/150.152.

Citation

Yoshida, M., H. Shioya, Y. Miyakoshi, F. Yamaguch, and H. Urabe.  2021.  Development of age determination technique part 2: image processing for age determination based on the annuli of a chum salmon scale.  N. Pac. Anadr. Fish Comm. Tech. Rep. 17: 150–152.  https://doi.org/10.23849/npafctr17/150.152.