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首页> 外文期刊>Polar biology >Spatial distributions and population dynamics of two salp species, Ihlea racovitzai and Salpa thompsoni, in the waters north of Liitzow-Holm Bay (East Antarctica) during austral summers of 2005 and 2006
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Spatial distributions and population dynamics of two salp species, Ihlea racovitzai and Salpa thompsoni, in the waters north of Liitzow-Holm Bay (East Antarctica) during austral summers of 2005 and 2006

机译：Liitzow-Holm湾（南极东部）2005年和2006年夏季的两个夏季，Ihlea racovitzai和Salpa thompsoni这两个羽扇豆物种的空间分布和种群动态

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摘要

Information on the sequences of generations and reproductive states of salps in the Southern Ocean is essential for an improved understanding of salp population growth, although changes in distribution patterns of two species of salps, Salpa thompsoni and Ihlea racovitzai, in the Southern Ocean have the potential to alter the Southern Ocean ecosystem. We used stratified, quantitative sampling from the surface to 2,000 m depth with an RMT 8 net in January of 2005 and 2006 to determine the distribution and population structure of salps in the north of Liitzow-Holm Bay, East Antarctica. Ihlea racovitzai occurred in both 2005 and 2006, but S. thompsoni was found only in 2005. Ihlea racovitzai occurred abundantly along the ice edge where Antarctic Winter Water was well developed, whereas S. thompsoni was more abundant at northern stations affected by warm Modified Circumpolar Deep Water. Small solitary stages of /. racovitzai dominated in 2005, but they had declined significantly by 2006. The 5. thompsoni population was composed of small immature aggregates and mature solitary stages, suggesting that the solitary stages were reproducing. We did not find mature aggregate and immature solitary stages in the present study and thus suggested that S. thompsoni was unable to complete its life cycle in the north of Lutzow-Holm Bay because of failure of sexual reproduction in the aggregate stage. The 5. thompsoni population was therefore probably transported to our study area by advection.
机译：关于南大洋Sal的世代顺序和生殖状态的信息对于增进对大p种群的了解是必不可少的，尽管南大洋中的两种species的分布模式的改变具有潜在的潜力。改变南部海洋生态系统我们在2005年1月和2006年1月使用RMT 8净水从地表到2,000 m深度进行了分层定量采样，以确定南极东部Liitzow-Holm湾以北的草场分布和种群结构。 Ihlea racovitzai发生在2005年和2006年，但仅在2005年发现了S.thompsoni。Ihlearacovitzai沿南极冬季水发育良好的冰缘大量发生，而S. thompsoni在受变温极地暖影响的北部站更丰富。深水。 /的小的孤立阶段。 racovitzai在2005年占主导地位，但到2006年已显着下降。5. thompsoni种群由小的未成熟聚集体和成熟的孤立期组成，表明孤立期正在繁殖。在本研究中，我们没有发现成熟的聚集和未成熟的孤独期，因此表明，由于聚集期的有性生殖失败，S。thompsoni无法完成其在Lutzow-Holm湾北部的生命周期。因此，可能通过平流将5. thompsoni种群转移到我们的研究区域。

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  • 来源
    《Polar biology》 |2013年第6期|807-817|共11页
  • 作者

    Atsushi Ono; Masato Moteki;

  • 作者单位

    Department of Ocean Sciences, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato,Tokyo 108-8477, Japan,Geochemical Oceanography Office of Geochemical Analysis,Department of Marine Science, Marine Works Japan Ltd,2-15 Natsushima, Yokosuka, Kanagawa 237-0061, Japan;

    Department of Ocean Sciences, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato,Tokyo 108-8477, Japan;

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  • 正文语种 eng
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  • 关键词

    ihlea racovitzai; salpa thompsoni; population structure; spatial distribution; liitzow-holm bay; southern ocean;

    机译：ihlea racovitzai;萨尔帕·索普索尼人口结构;空间分布;利兹霍姆湾南部海洋;

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