North Pacific Anadromous Fish Commission

Technical Report 15

Table of Contents

Long-term Trends of Distribution and Regional Composition of Hatchery-released Juvenile Pink and Chum Salmon in the Sea of Okhotsk during the Fall of 2011–2017

Authors:
Alexander V. Bugaev, Alexandra I. Chistyakova, and Shigehiko Urawa

Abstract Excerpt:
The Sea of Okhotsk is the most important feeding area for juvenile pink and chum salmon of Asian origin during the first summer and fall (Radchenko et al. 2018; Urawa et al. 2018). General long-term tendencies of distribution and migration of hatchery-released juvenile pink and chum salmon in the basin of the Sea of Okhotsk in the fall of 2011–2017 were figured out as a result of otolith mark analysis for fish samples caught by the trawl surveys of TINRO-Center (Fig. 1). Otolith samples were collected from 6,924 pink and 9,870 chum salmon (Table 1). Subsamples to examine otolith marks were made at every station of trawling, where the number of juvenile fish in the catch was appropriate to take 50 individuals or so for the subsampling. The North Pacific Anadromous Fish Commission (NPAFC) otolith mark release database (http://npafc.taglab.org/arkSummary.asp) was used for the identification of hatchery origins. The statistics of the hatchery releases of otolith-marked pink and chum salmon in Russian Far East and Japan was also cited from the official data by NPAFC.

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

DOI:
https://doi.org/10.23849/npafctr15/46.48.

Citation

Bugaev, A.V., A.I. Chistyakova, and S. Urawa.  2019.  Long-term trends of distribution and regional composition of hatchery-released juvenile pink and chum salmon in the Sea of Okhotsk during the fall of 2011–2017.  N. Pac. Anadr. Fish Comm. Tech. Rep. 15: 46–48.  https://doi.org/10.23849/npafctr15/46.48.