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首页> 外文期刊>Marine biology >Diurnal gut pigment rhythm and metabolic rate of Calanus euxinus in the Black Sea
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Diurnal gut pigment rhythm and metabolic rate of Calanus euxinus in the Black Sea

机译：黑海中尾的昼夜色素节律和新陈代谢速率

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摘要

The vertical distribution, diel gut pigment content and oxygen consumption of Calanus euxinus were studied in April and September 1995 in the Black Sea. Gut pigment content of C. euxinus females was associated with diel vertical migration of the individuals, and it varied with depth and time. Highest gut pigment content was observed during the nighttime, when females were in the chlorophyll a (chl a) rich surface waters, but significant feeding also occurred in the deep layer. Gut pigment content throughout the water column varied from 0.8 to 22.0 ng pigment female(-1) in April and from 0.2 to 21 ng pigment female(-1) in September 1995. From the diel vertical migration pattern, it was estimated that female C. euxinus spend 7.5 h day(-1) in April and 10.5 h day(-1) in September in the chl a rich surface waters. Daily consumption by female C. euxinus in chl a rich surface waters was estimated by taking into account the feeding duration and gut pigment concentrations. Daily carbon rations of female C. euxinus, derived from herbivorous feeding in the euphotic zone, ranged from 6% to 11% of their body carbon weight in April and from 15% to 35% in September. Oxygen consumption rates of female and copepodite stage V ( CV) C. euxinus were measured at different temperatures and at different oxygen concentrations. Oxygen consumption rates at oxygen-saturated concentration ranged from an average of 0.67 mu g O-2 mg(-1) dry weight (DW) h(-1) at 5 degrees C to 2.1 mu g O-2 mg(-1) DW h(-1) at 23 degrees C for females, and ranged from 0.48 mu g O-2 mg(-1) DW h(-1) at 5 degrees C to 1.5 mu g O-2 mg(-1) DW h(-1) at 23 degrees C for CVs. The rate of oxygen consumption at 16 degrees C varied from 0.62 mu g O-2 mg(-1) DW h(-1) at 0.65 mg O-2 l(-1) to 1.57 mu g O-2 mg(-1) DW h(-1) at 4.35 mg O-2 l(-1) for CVs, and from 0.74 mu g O-2 mg(-1) DW h(-1) at 0.57 mg O-2 l(-1) to 2.24 mu g O-2 mg(-1) DW h(-1) at 4.37 mg O-2 l(-1) for females. From the oxygen consumption rates, daily requirements for the routine metabolism of females were estimated, and our results indicate that the herbivorous daily ration was sufficient to meet the routine metabolic requirements of female C. euxinus in April and September in the Black Sea.
机译：1995年4月和1995年9月，在黑海研究了长尾alan（Calanus euxinus）的垂直分布，diel肠色素含量和耗氧量。 euxinus雌性肠内色素含量与个体diel垂直迁移有关，并且随深度和时间而变化。夜间观察到最高的肠内色素含量，当雌性处于富含叶绿素a（chl a）的地表水中时，但深层也发生了大量摄食。整个水柱中肠内色素的含量在4月为0.8至22.0 ng色素母（-1），1995年9月在0.2至21 ng色素母（-1）之间。 euxinus在4月的7.5 h（-1）和9月的10.5 h（-1）的一天都在丰富的地表水中。通过考虑进食时间和肠道色素的浓度，估计在丰富的地表水中雌性C. euxinus的日摄入量。源自富营养区的草食性摄食的雌性C. euxinus的日碳定量在4月占其体重碳的6％至11％，在9月从15％至35％。在不同的温度和不同的氧气浓度下测量雌性和角足类V（CV）的C. euxinus的耗氧率。氧饱和浓度下的耗氧率介于5摄氏度下平均0.67μgO-2 mg（-1）干重（DW）h（-1）至2.1μgO-2 mg（-1）女性在23摄氏度下的DW h（-1），范围从5摄氏度下的0.48微克O-2 mg（-1）DW h（-1）到1.5微克O-2毫克D-2 h（-1）DW CV在23摄氏度下的h（-1）。 16摄氏度下的耗氧率从0.65 mg O-2 l（-1）的0.62μgO-2 mg（-1）DW h（-1）到1.57μgO-2 mg（-1） ）CV的DW h（-1）为4.35 mg O-2 l（-1），0.57 mg O-2 l（-1）为0.74μgO-2 mg（-1）DW h（-1） ）至雌性的4.37 mg O-2 l（-1）为2.24微克O-2 mg（-1）DW h（-1）。从耗氧率估算出女性日常代谢的每日需求量，我们的结果表明，草食性日粮足以满足黑海4月和9月雌性梭状芽胞杆菌的日常代谢需求。

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