Characteristic features of body composition and metabolism in some interzonal copepods
Characteristic features of body composition and metabolism in some interzonal copepods
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一些跨带桡足类的身体成分和代谢特征
DOI：
10.1007/bf01319701
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发表时间：
1991
期刊：
影响因子：
2.4
通讯作者：
A. Pasternak
中科院分区：
文献类型：
--
作者：
M. Flint;A. Drits;A. Pasternak
测量了四种太平洋桡足类跨带物种的蛋白质、脂质、磷和有机碳含量，以及电子传递系统（ETS）活性、乳酸脱氢酶活性和肠道排空率：澳洲哲水蚤（Calanus australis）、太平洋桡足类（C. pacificus）、无刺桉（Eucalanus inermis）和E. elongatus f.hyalinus，1987 年 2 月至 4 月在秘鲁（8°S）和加利福尼亚（27°N）附近的上升流区域以及北太平洋中部（30°N）采集。无刺和E。 elongatus — 具有独特的生化和元素身体成分以及主要生理过程的速率。这些物种的相对蛋白质、脂质、磷和有机碳含量（μg mg−1 湿重）分别约为1/7 至 1/10、1/5 至 1/20、1/5 至 1/10 和 1/5 属于哲水蚤属 (Calanus spp)。同样，每单位湿重的吸氧率（基于 ETS 活性）以 E 为单位。无刺和E。 elongatus 是 Calanids 的 5% 至 10%；磷排泄率也存在类似差异。此外，E 中的肠道排空率。无刺和E。 elongatus 大约是。其中五分之一是Calanus spp。根据这些数据，我们认为真桉属于一个独特的生理类群，形象地称为“胶体”桡足类动物。与calanids相反，在大肠杆菌体内发现了活性乳酸脱氢酶。无刺和E。 elongatus，显然允许它们在含氧量极低（<0.2 ml l−1）的层中存活很长时间。比较了这些真蜥蜴和“典型”蜥蜴生理特征的适应性价值。
Protein, lipid, phosphorus, and organic carbon contents, as well as electron transport system (ETS) activity, lactatedehydrogenase activity, and gut evacuation rate, were measured in four interzonal species of Pacific copepods:Calanus australis, C. pacificus, Eucalanus inermis, andE. elongatus f.hyalinus, collected at the upwelling areas off Peru (8°S) and California (27°N), and in the middle of the North Pacific (30°N), from February to April 1987. The two Eucalanidae species —E. inermis andE. elongatus — have distinctive biochemical and elemental body composition and rates of main physiological processes. Relative protein, lipid, phosphorus, and organic carbon contents (µg mg−1 wet weight) in these species were, respectively, ca. 1/7 to 1/10, 1/5 to 1/20, 1/5 to 1/10, and 1/5 those inCalanus spp. Likewise, oxygen uptake rate per unit of wet weight (based on ETS activity) inE. inermis andE. elongatus was 5 to 10% of that in calanids; a similar difference was found in phosphorus excretion rate. In addition, gut evacuation rates inE. inermis andE. elongatus were ca. one-fifth of those inCalanus spp. Based on these data, we considered the eucalanids as belonging to a distinctive physiological group, figuratively named “jelly-body” copepods. In contrast with calanids, active lactatedehydrogenase has been found in the bodies ofE. inermis andE. elongatus, apparently allowing them to survive for a long time in layers of extremely low oxygen content (<0.2 ml l−1). The adaptive value of physiological features in these eucalanids and “typical” calanids is compared.