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首页> 外文期刊>Oceanology >The Invader into the Caspian Sea Ctenophore Mnemiopsis and Its Initial Effect on the Pelagic Ecosystem
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The Invader into the Caspian Sea Ctenophore Mnemiopsis and Its Initial Effect on the Pelagic Ecosystem

机译：入侵里海的食蟹角虫的研究及其对远洋生态系统的初步影响

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摘要

The distribution and biology of the new invader into the Caspian Sea-the carnivorous ctenophore Mnemiopsis-were studied. Data on the mnemiopsis dispersion in the North, Middle, and South Caspian Sea; it's abundance; biomass; and seasonal dynamics in 2000 are presented for the first time. In July, mnemiopsis was widely spread in the Middle Caspian and the northern part of the South Caspian Sea, while no cenophore was found in the North Caspian Sea. In the North Caspian it was first found in September. In Oectober, in the North Caspain Sea, the mnemiopsis habitat expanded, the biomass increased 3.5 times, and, at some places, its abundance reached 170 ind./m~2. The northward penetration was limited by the 4 per thousand isohaline. Preliminary data on the dependence of the wet weight on body length, metabolic activity, and dry substance content were obtained. A comparative analysis of the species composition, abundance, and biomass of the North Caspian zooplankton in July and October is presented. A decrease in the zooplankton abundance (5.3 times) and biomass (6 times) was recorded in October in comparison to July; the decrease of the Copepoda abundance was the most considerable.
机译：研究了新侵略者在里海的分布和生物学-食肉的食蟹蝠Mnemiopsis。北里海和南里海的羊膜散布数据;丰富;生物质以及2000年的季节性动态。 7月，羊膜增生症在中里海和南里海的北部广泛传播，而北里海则没有发现盲oph。在北里海首次发现于9月。在北卡斯帕海的奥克托伯，羊栖动物栖息地扩大了，生物量增加了3.5倍，在某些地方，其丰度达到了170 ind./m~2。向北的渗透受到每千个异卤中4个的限制。获得了有关湿重对体长，代谢活性和干物质含量的依赖性的初步数据。提出了对七月和十月北里海浮游动物物种组成，丰度和生物量的比较分析。与七月份相比，十月份浮游动物的丰度减少了5.3倍，生物量减少了6倍。 pe足类的丰度下降最为明显。

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