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The Recent Experience of Surveying Pacific Salmon Spawning Grounds in Watercourses of Chukotka

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Abstract

An aerial survey of Pacific salmon spawning grounds in the main watercourses that empty into the Bering Sea was conducted for the first time since 1992. The total flight time was 35 h; the approximate total length of transects was 3800 km. The number and distribution of Pacific salmon spawners in the Anadyr, Velikaya, Tumanskaya rivers and in the Meynypilgyno lake–river system have been assessed. According to the results of the aerial survey of the rivers of Chukotka Autonomous Okrug, the numbers of Pacific salmon spawners, estimated by the method of direct counts, were as follows: chum salmon, 660 700 fish; sockeye salmon, 112 200 fish; and pink salmon, 3 678 000 fish.

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ACKNOWLEDGMENTS

We are grateful to Timofey Anatolyevich Petrov, a regional representative of the Aviation Association in Chukotka Autonomous Okrug, for organizing the routes, providing the refueling points, and the general logistics of aerial survey operations.

Funding

The study was conducted within the framework of economical and contractual works with OOO Akvamarin which carries out fishing for Pacific salmon in Chukotka Autonomous Okrug.

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Authors and Affiliations

  1. Pacific Branch, Russian Federal Research Institute of Fisheries and Oceanography (TINRO), 690091, Vladivostok, Russia

    E. A. Shevlyakov

  2. Kamchatka Branch, Russian Federal Research Institute of Fisheries and Oceanography (KamchatNIRO), 683000, Petropavlovsk-Kamchatsky, Russia

    S. V. Shubkin

Authors
  1. E. A. Shevlyakov
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  2. S. V. Shubkin
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Contributions

E.A. Shevlyakov developed the concept of the study. Both authors put equal efforts in planning, organizing, conducting the work, in analyzing, interpreting, and discussing the results, and in writing the manuscript. S.V. Shubkin carried out preparative technical works, designed routes, and processed material.

Corresponding authors

Correspondence to E. A. Shevlyakov or S. V. Shubkin.

Ethics declarations

The authors declare that they have no conflict of interest. This article does not contain any studies involving animals or human participants performed by any of the authors. The authors of the study are representatives of industry’s institutions of the state regulator (the Federal Agency for Fishery) in fisheries responsible for the conservation of aquatic bioresources and ensuring their rational harvesting.

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Translated by E. Shvetsov

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Shevlyakov, E.A., Shubkin, S.V. The Recent Experience of Surveying Pacific Salmon Spawning Grounds in Watercourses of Chukotka. Russ J Mar Biol 46, 562–579 (2020). https://doi.org/10.1134/S106307402007007X

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