Metabolism and chemical composition of pelagic decapod shrimps: synthesis toward a global bathymetric model
Metabolism and chemical composition of pelagic decapod shrimps: synthesis toward a global bathymetric model
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中上层十足类虾的代谢和化学成分：全球测深模型的综合
DOI：
10.1007/s10872-013-0200-x
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发表时间：
2013
影响因子：
2.3
通讯作者：
T. Ikeda
中科院分区：
文献类型：
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作者：
T. Ikeda
收集了世界各大洋表层至深海区16-43只浮游十足类的呼吸、氨排泄和化学成分[含水量、灰分、碳（C）、氮（N）和C：N比]数据。对于呼吸作用，个体干质量、栖息地温度和采样深度等自变量均是经验回归模型的显著预测变量，而前两个变量是理论回归模型的显著预测变量。对于氨排泄，身体干质量和栖息地温度是两个回归模型的显着预测。总体而言，这些变量占数据方差的68- 87%。原子O：N比（呼吸：氨排泄）范围为9.1至91（中位数16.4），并没有明显的影响，这三个变量进行了检测。身体组成成分没有显着影响的三个变量，除了栖息地温度对灰分和负影响采样深度对N组成的积极影响。根据C：N比值判断，蛋白质被认为是大多数远洋十足类的主要有机成分。一些来自>500 m深度的远洋十足类显示出较高的C：N比（8.6-10.2），表明体内有脂质沉积。比较目前的结果与全球测深模型的磷虾和糠虾揭示了很大的相似性，这些浮游甲壳类类群的共同行为和形态特征，如积极的游泳，发达的复眼和呼吸鳃器官。
Respiration, ammonia excretion and chemical composition data [water content, ash, carbon (C), nitrogen (N) and C:N ratios] of 16–43 pelagic decapods from epipelagic through abyssopelagic zones of the world’s oceans were compiled. For respiration, the independent variables including body dry mass, habitat temperature and sampling depth were all significant predictors of the empirical regression model, whereas the former two variables were significant predictors of the theoretical regression model. For ammonia excretion, body dry mass and habitat temperature were significant predictors of both regression models. Overall, these variables accounted for 68–87 % of the variance in the data. Atomic O:N ratios (respiration:ammonia excretion) ranged from 9.1 to 91 (median 16.4), and no appreciable effects of the three variables were detected. Body composition components were not significantly affected by the three variables, except positive effects of habitat temperature on ash and negative effects of sampling depth on N composition. As judged by C:N ratios, protein was considered to be the major organic component of most pelagic decapods. Some pelagic decapods from >500 m depth exhibited high C:N ratios (8.6–10.2), suggesting a deposition of lipids in the body. Comparison of the present results with global bathymetric models of euphausiids and mysids revealed great similarities among these pelagic crustacean taxa characterized by common behavioral and morphological features such as active swimming, developed compound eyes and respiratory gill organ.