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首页> 外文期刊>ICES Journal of Marine Science >Metabolism and chemical composition of mesopelagic ostracods in the western North Pacific Ocean
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Metabolism and chemical composition of mesopelagic ostracods in the western North Pacific Ocean

机译：北太平洋西部近中生成龙类的代谢和化学成分

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摘要

Oxygen consumption rates and bodily elemental composition (carbon (C) and nitrogen (N)) were determined on three dominant ostracods (Discoconchoecia pseudodiscophora, Orthoconchoecia haddoni, and Metaconchoecia skogsbergi) from the mesopelagic zone of the Oyashio region. Specific oxygen consumption rates of the three species at near in situ temperature (3 ℃) were similar (0.39 μl O_2 mg DW~(-1) h~(-1)), but bodily C composition and C:N ratios of D. pseudodiscophora were significantly higher than those of the other two species. Metabolic comparison in terms of "daily body C loss" or "adjusted metabolic rate" revealed that metabolic rates of the ostracods are 0.3-0.4 times those of other zooplankton at comparable temperature conditions. The present results were combined with standing stock data of each ostracod in the Oyashio region to estimate their POC ingestion. Our calculation indicates annual ingestion by the ostracods to be 875 mgC m~(-2) yr~(-1), which equates to 3.7% of annual POC flux reaching 200-600-m depth (mid-point: 400-m depth) in this region.
机译：在Oyashio地区的中古生境带上，测定了三种主要的成龙类（Discoconchoecia pseudodiscophora，Orthoconchoecia haddoni和Metaconchoecia skogsbergi）的耗氧率和身体元素组成（碳（C）和氮（N））。这三种物种在接近原位温度（3℃）下的比耗氧率相似（0.39μlO_2 mg DW〜（-1）h〜（-1）），但身体的碳组成和D的C：N比。假二足动物明显高于其他两个物种。在“每日体内碳损失”或“调整后的代谢率”方面进行的代谢比较显示，在可比较的温度条件下，该类成虫的代谢率是其他浮游动物的0.3-0.4倍。本研究结果与Oyashio地区每个成龙的常备存量数据相结合，以估计其POC摄入量。我们的计算表明，该类成虫的年摄入量为875 mgC m〜（-2）yr〜（-1），相当于到达200-600-m深度的年POC通量的3.7％（中点：400-m深度） ）。

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