A year round comparative study on the population structures of pelagic Ostracoda in Admiralty Bay (Southern Ocean)
A year round comparative study on the population structures of pelagic Ostracoda in Admiralty Bay (Southern Ocean)
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DOI：
10.1007/s10750-007-0629-2
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发表时间：
2007-07
期刊：
影响因子：
2.6
通讯作者：
K. Błachowiak-Samołyk;M. Angel
中科院分区：
文献类型：
--
作者：
K. Błachowiak-Samołyk;M. Angel
从1993年2月至1994年1月，每三周采集一次浮游动物样本，对金钟湾（南极半岛乔治国王岛）三种优势浮游盐栖介形虫的种群结构进行了为期一年的跟踪研究。采样在两个站点进行：A在金钟湾中部（400-0米），B在从布兰斯菲尔德海峡进入金钟湾（400-0米）。使用WP-2网（方形开口0.196 m2, 200µm网）从底部垂直拖至表面采集样品。对三种Alacia belbelicae、Alacia hettacra和Metaconchoecia isocheera的种群年龄结构变化进行了跟踪研究。它们的人口结构不同。这些变化。比利时认为它全年繁殖，而英国和法国都认为它全年繁殖。hettacraandM。等chera可能在一年内完成它们的生命周期。循环1。这一年开始的时间可能比m。isocheira。人口耀目。belgicaeandM。在A站，等染色体的发育比在B站更先进。赫塔拉在后者方面更为先进。平流似乎在维持陆架水域的种群方面发挥了作用。在陆架地区（海军部湾）和开阔海域（克罗克通道）的种群比较表明，它们的种群数量是不同的。陆架水域的等头鲸种群年龄较大，而陆架水域的等头鲸种群年龄结构较小。比利时人口不受地方的影响。
The population structures of the three dominant planktonic halocyprid Ostracoda species in Admiralty Bay (King George Island, Antarctic Peninsula) were followed throughout the course of a year in zooplankton samples collected once every three weeks from February 1993 to January 1994. The sampling was conducted at two stations: A in the central part of Admiralty Bay (400-0 m) and B in the entrance to the Bay from the Bransfield Strait (400-0 m). The samples were taken using a WP-2 net (square mouth opening of 0.196 m2and 200 µm mesh) hauled vertically from the bottom to the surface. Changes in the age structures of the populations of three speciesAlacia belgicae, Alacia hettacra and Metaconchoecia isocheirawere tracked. Their population structures differed. The changes inA. belgicaesuggested that it reproduces year-round, whereas bothA. hettacraandM. isocheiraprobably complete their life cycles within a year. The cycle inA. hettacraprobably starts earlier in the year than that ofM. isocheira. Populations ofA. belgicaeandM. isocheirawere more advanced in their development at station A, than at station B, butA. hettacrawas more advanced at the latter. Advection appears to play a role in maintaining the populations in the shelf waters. Comparisons between populations in the shelf area (Admiralty Bay) and in open ocean waters (Croker Passage) show that theM. isocheirapopulation is older in shelf water whereas the age structure ofA. belgicaepopulation is not influenced by the locality.