Abstract

The species composition, abundance, biomass, and distribution of zooplankton were studied on the shelf and slope of the northwestern Laptev Sea and the shelf of the East Siberian Sea in summer 2015. The trophic status of common zooplankton and fish species, as well as their position in the food webs of these two seas, has been determined based on stable carbon and nitrogen isotope analyses (δ¹³C and δ¹⁵N). Data of both stomach content and stable isotope analyses show significant age-related variations in the trophic status of the Arctic cod Boreogadus saida, which is the dominant fish species.

中文翻译：

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拉普捷夫和东西伯利亚海的浮游动物组成和水生生物的营养状态

摘要

2015年夏季，研究了西北拉普捷夫海和东西伯利亚海陆架和斜坡上浮游动物的种类组成，丰度，生物量和分布。常见浮游动物和鱼类的营养状况以及它们的营养状况在这两个海域的食物网位置，已确定基于稳定碳和氮同位素分析（δ ¹³ C和δ ¹⁵ N）。胃内容物和稳定同位素分析的数据显示，北极鳕鱼Berogeadus saida的营养状态存在明显的年龄相关变化，后者是主要鱼类。