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首页> 外文期刊>Journal of oceanography >Metabolism and chemical composition of marine pelagic amphipods: synthesis toward a global bathymetric model
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Metabolism and chemical composition of marine pelagic amphipods: synthesis toward a global bathymetric model

机译：海洋浮游两栖动物的代谢和化学成分：合成全球测深模型

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Respiration and ammonia excretion data and chemical composition data [water content, ash, carbon (C), nitrogen (N) and C:N ratios] of 18-32 amphipods (hy-periids and gammarids) from the epipelagic through bathypelagic zones of the world's oceans were compiled. The independent variables including body mass, habitat temperature and mid-sampling depth were all significant predictors of respiration, accounting for 65-83 % of the variance in the data, while the former two variables were significant predictors of ammonia excretion, accounting for 64-77 % of the variance. Atomic O:N ratios (respira-tion:ammonia excretion) ranged from 11 to 74 (median 21.5). C composition was negatively correlated with habitat temperature, but water contents, ash, N, and the C:N ratio were uncorrelated with the three independent variables. As judged by C:N ratios, protein was considered to be the major organic component of most pelagic amphipods. However, some amphipods from ＞500 m depth exhibited high C:N ratios (＞10) suggesting a large deposition of lipids in the body. Comparison of the present results with global bathymetric models of euphausiids and pelagic copepods revealed that respiration rates of the pelagic amphipods were near-equal to the rates of euphausiids but greater than the rates of pelagic copepods, reflecting taxon-specific body morphology and swimming behavior among the three taxa. As a marked feature of body chemical composition, the pelagic amphipods exhibited extremely high ash content (mean 25 % of DM) due to their possession of a robust exoskeleton.
机译：从上层到深水区的18-32个两足纲（杂类和γ线虫）的呼吸和氨排泄数据以及化学成分数据[水含量，灰分，碳（C），氮（N）和C：N比]世界海洋被汇编。包括体重，生境温度和采样中间深度在内的自变量都是呼吸的重要预测指标，占数据差异的65％至83％，而前两个变量是氨氮排泄的重要预测指标，占64％。差异为77％。 O：N原子比（呼吸：氨气排泄）范围从11到74（中值21.5）。碳的组成与栖息地温度呈负相关，但水含量，灰分，氮和碳氮比与三个独立变量无关。通过C：N比值​​判断，蛋白质被认为是大多数上层两栖动物的主要有机成分。但是，某些深度大于＞ 500 m的两栖动物表现出较高的C：N比（＞ 10），表明体内大量脂质沉积。将当前结果与虾青纲和浮游co足类的全深模型相比较，发现浮游两栖类动物的呼吸速率几乎等于浮游双足类的呼吸速率，但大于浮游co足类的呼吸速率，这反映了分类群特定的身体形态和游泳行为三个分类单元。作为人体化学成分的显着特征，中上肢两栖动物由于拥有强大的外骨骼而显示出极高的灰分含量（平均DM的25％）。

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