Abstract—The bay waters of the Sea of Okhotsk near the Shantar Islands are the most important summer grazing areas for bowhead whales (Balaena mysticetus) of the Okhotsk population. A hydrobiological survey during the period from July 12–28th, 2016, demonstrated that waters around the Shantar archipelago are characterized by high concentrations of humic substance supplied by the peat-laden banks of rivers flowing into the bays. The average chlorophyll concentrations in bottom waters of Uda and Academy bays were 1.1 and 4.3 mg/m³, respectively. Uda and Academy bays are mainly considered heterotrophic and autotrophic basins, respectively. The measured zooplankton biomass in Uda Bay ranged from 9.5 to 2513 mg/m³, averaging 736 mg/m³; the corresponding characteristics in Academy Bay were 0.38 to 3620 mg/m³, averaging 458 mg/m³. In the Shantar water area, copepods of the species Calanus glacialis were the dominant contributor in terms of zooplankton biomass and species abundance. During early summer, nine bowhead whales were sighted south off Feklistov Island and lone whales were recorded in the North Strait and at the mouth of Nikolai Bay. The low density of polar whales in the Shantar water area in early summer may be due to the low zooplankton biomass after spring bloom and the last spawning.

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Shantar水域的水生物特征与鄂霍次克族弓头鲸夏季放牧有关

摘要—香塔尔群岛附近的鄂霍次克海的海湾水域是鄂霍次克人的弓头鲸（Balaena mysticetus）最重要的夏季放牧区。2016年7月12日至28日进行的水生生物调查显示，香塔尔群岛周围的水域特征是，流入海湾的泥炭河岸提供了高浓度的腐殖质。Uda和Academy湾底水的平均叶绿素浓度分别为1.1和4.3 mg / m ³。Uda和Academy湾分别主要被视为异养盆地和自养盆地。在Uda湾测得的浮游生物量为9.5至2513 mg / m ³，平均为736 mg / m ³; Academy Bay的相应特征为0.38至3620 mg / m ³，平均为458 mg / m ³。在Shantar水域中，就浮游动物生物量和物种丰富度而言，Calanus glacialis物种的pe足类是主要的贡献者。在初夏期间，在Feklistov岛南部发现了九头弓头鲸，在北海峡和尼古拉湾河口发现了孤独的鲸鱼。夏初的Shantar水域中的鲸鱼密度低可能是由于春季开花和最后产卵后浮游动物生物量较低。