North Pacific Anadromous Fish Commission

Technical Report 11

Table of Contents

Biology of Juvenile Ozernovskaya Sockeye Salmon Oncorhynchus nerka (the Ozernaya River, Basin of the Kurilskoe Lake) during Downstream Migration and Early Marine Period of Life

Authors:
Maksim Koval, Sergey Gorin, Alexander Vasilenko, Vladimir Dubynin, and Anton Klimov

Abstract Excerpt:
Ozernovskaya sockeye salmon is the largest and the most studied population of Asian sockeye salmon, spawning in the basin of Ozernaya River and Kurilskoe Lake (South Kamchatka).1 In the 1930s, results of studying this population were generalized for the first time (Krokhin and Krogius 1937), and since 1940, monitoring research has been provided (Anon 2010; Koval et al. 2014). During this period the biology of Ozernovskaya sockeye salmon in the course of spawning, juvenile foraging in the Kurilskoe Lake (before migration into the Ozernaya River), the marine period of life, and spawning migration has been determined (Bugaev 1995, 2011; Bugaev et al. 2009). Yet, until recently the biology during juvenile downstream migration and early marine period has been poorly understood, although it is known that for some Pacific salmon species (i.e., pink and chum salmon) migrations and period in estuaries and nearshore are the most critical periods of life, forming generation abundance (Karpenko 1998; Levings 2016). A high mortality of juvenile salmon during these periods of their life history makes it difficult to forecast adult returns, which are necessary for efficient stock management and sustainable fishing (Shevlyakov and Koval 2012).

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

DOI:
https://doi.org/10.23849/npafctr11/29.38

Citation

Koval, M., S. Gorin, A. Vasilenko, V. Dubynin, and A. Klimov.  2018.  Biology of juvenile Ozernovskaya sockeye salmon Oncorhynchus nerka (the Ozernaya River, basin of the Kurilskoe Lake) during downstream migration and early marine period of life.  N. Pac. Anadr. Fish Comm. Tech. Rep. 11: 29–38.  https://doi.org/10.23849/npafctr11/29.38