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首页> 外文期刊>Polar biology >Life cycle, distribution and trophodynamics of the lanternfish Krefftichthys anderssoni (Lonnberg, 1905) in the Scotia Sea
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Life cycle, distribution and trophodynamics of the lanternfish Krefftichthys anderssoni (Lonnberg, 1905) in the Scotia Sea

机译：斯科舍海中灯笼鱼Krefftichthys anderssoni（Lonnberg，1905年）的生命周期，分布和营养动力学

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摘要

Myctophid fish play an important role in the Southern Ocean pelagic food web. The lanternfish Krefftichthys anderssoni is one of the most common myctophids in the region, but its ecology is poorly known. This study examines spatial and temporal patterns in the species distribution of density, life cycle, population structure and diet using samples collected by mid-water trawl nets deployed in different seasons across the Scotia Sea. Virtually absent from the sea-ice zone, the species was most abundant in the northern Scotia Sea around the Georgia Basin at depths below 400 m that are associated with the Circumpolar Deep Water. The species migrated during night from waters deeper than 700 m to waters above the 400 m following their main prey species: the copepods Rhincalanus gigas and Calanoides acutus and euphausiids of the Thysanoessa genus. Larvae length distribution and post-larvae length-frequency analyses suggested a life cycle of similar to 3 years with spawning and recruitment strongly connected with APF and the South Georgia shelf. Our results show that species spatial distribution, population structure and diet changed both seasonally and ontogenetically. This study is the most comprehensive examination of the ecology of K. anderssoni in the Southern Ocean to date and contributes to resolving how pelagic food webs and ecosystems operate in the region.
机译：Myctophid鱼在南大洋中上层食物网中起着重要作用。灯笼鱼Krefftichthys anderssoni是该地区最常见的肉食性鱼类，但其生态却鲜为人知。这项研究使用在整个苏格兰海不同季节部署的中层拖网收集的样本，研究了密度，生命周期，种群结构和饮食的物种分布的时空格局。该物种几乎不存在于海冰区，该物种在佐治亚盆地周围的斯科舍海北部最丰富，与环极深水有关的深度低于400 m。该物种在夜间从其主要猎物物种：pe足类Rhincalanus gigas和Calanoides acutus以及Thysanoessa属的长足类动物中，从700 m以上的水域迁移到400 m以上的水域。幼虫体长分布和幼体后体长频率分析表明，其生命周期与3年相似，产卵和募集与APF和南佐治亚大陆架密切相关。我们的结果表明，物种的空间分布，种群结构和饮食结构在季节和个体发生上都发生了变化。这项研究是迄今为止对南大洋K. Anderssoni生态学的最全面的考察，有助于解决该地区中上层食物网和生态系统的运行方式。

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  • 来源
    《Polar biology》 |2017年第6期|1229-1245|共17页
  • 作者

    Lourenco Silvia; Saunders Ryan A.; Collins Martin; Shreeve Rachel; Assis Carlos A.; Belchier Mark; Watkins Jonathan L.; Xavier Jose C.;

  • 作者单位

    Univ Coimbra, MARE Marine & Environm Sci Ctr, Dept Ciencias Vida, P-3001401 Coimbra, Portugal|Univ Lisbon, Fac Ciencias, MARE Marine & Environm Sci Ctr, P-1749016 Lisbon, Portugal|Ctr Maricultura Calheta, Div Serv Invest Direcao Reg Pescas & Aquacultura, Ave D Manuel 1,7, P-9370135 Calheta, Portugal|CIIMAR Interdisciplinary Ctr Marine & Environm Re, Terminal Cruzeiros Porto Leixoes, Ave Gen Norton de Matos S-N, P-4450208 Oporto, Portugal;

    British Antarctic Survey, NERC, Madingley Rd, Cambridge CB3 0ET, England;

    Univ Aberdeen, Inst Biol & Environm Sci, Zool Bldg,Tillydrone Ave, Aberdeen AB24 2TZ, Scotland;

    British Antarctic Survey, NERC, Madingley Rd, Cambridge CB3 0ET, England;

    Univ Coimbra, MARE Marine & Environm Sci Ctr, Dept Ciencias Vida, P-3001401 Coimbra, Portugal|Univ Lisbon, Fac Ciencias, MARE Marine & Environm Sci Ctr, P-1749016 Lisbon, Portugal|Univ Lisbon, Fac Ciencias, Dept Biol Anim, P-1749016 Lisbon, Portugal;

    British Antarctic Survey, NERC, Madingley Rd, Cambridge CB3 0ET, England;

    British Antarctic Survey, NERC, Madingley Rd, Cambridge CB3 0ET, England;

    Univ Coimbra, MARE Marine & Environm Sci Ctr, Dept Ciencias Vida, P-3001401 Coimbra, Portugal|Univ Lisbon, Fac Ciencias, MARE Marine & Environm Sci Ctr, P-1749016 Lisbon, Portugal|British Antarctic Survey, NERC, Madingley Rd, Cambridge CB3 0ET, England;

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  • 正文语种 eng
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  • 关键词

    Southern Ocean; Myctophids; Distribution; Trophic ecology;

    机译：南方海洋;Myctophids;分布;营养生态学;

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