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.

中文翻译：

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楚科奇河水域太平洋鲑鱼产卵场调查的最新经验

摘要

自1992年以来，首次对空置到白令海的主要水道中的太平洋鲑鱼产卵场进行了空中调查。总飞行时间为35小时；样条线的总长度约为3800公里。已对Anadyr，Velikaya，Tumanskaya河和Meynypilgyno湖河系统中太平洋鲑鱼产卵的数量和分布进行了评估。根据楚科奇自治奥库格河的航测结果，通过直接计数法估算的太平洋鲑鱼产卵场数量为：鲑鱼，660 700条鱼；红鲑鱼，112200条鱼; 和粉红鲑鱼3678 000条鱼。