North Pacific Anadromous Fish Commission

Technical Report 17

Table of Contents

Development of a Selection Method of Favorable Juvenile Fish by Egg Weight in Masu Salmon (Oncorhynchus masou)

Authors: 
Yoshinari Uematsu, Arimune Munakata, and Hiroyuki Matsuda

Abstract Excerpt:
Masu salmon (Oncorhynchus masou) is an important target for coastal fisheries in Japan (Hasegawa et al. 2021). However, the stock abundance of this salmon has been decreasing since the 1980’s (Miyakoshi 2014). As a countermeasure, attempts have been made to increase the stock abundance by discharging juveniles (HRO 2013), but the effectiveness is low. One solution to this problem is to improve the quality of discharging juveniles by a selection method without genetic or hormonal treatments. Previous studies in chinook salmon (O. tshawytscha) have revealed that differences in egg weight resulted in different properties, such as growth rate and migration timing (Cogliati et al. 2018). Hence, selection by egg weight may contribute to improving quality of discharging juveniles in other species.

*This is the first paragraph of an extended abstract. Download the full abstract below.

DOI:
https://doi.org/10.23849/npafctr17/144.146.

Citation

Uematsu, Y., A. Munakata, and H. Matsuda.  2021.  Development of a selection method of favorable juvenile fish by egg weight in masu salmon (Oncorhynchus masou).  N. Pac. Anadr. Fish Comm. Tech. Rep. 17: 144–146.  https://doi.org/10.23849/npafctr17/144.146.