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首页> 外文期刊>ICES Journal of Marine Science >Nursery systems for Patagonian grenadier off Western Patagonia: large inner sea or narrow continental shelf?
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Nursery systems for Patagonian grenadier off Western Patagonia: large inner sea or narrow continental shelf?

机译：西巴塔哥尼亚附近的巴塔哥尼亚手榴弹的苗圃系统：大内海还是狭窄的大陆架？

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摘要

Adjacent to Chile's long and narrow continental shelf, the Patagonian Inner Sea (PES) is among the largest and most complex estuarine systems in the world. The PES harbours high concentrations of juveniles and adults of important groundfishes, which spawn within or in near proximity to it. A dominant view is that recruitment primarily originates here rather than in adjacent coastal regions. We used otolith stable isotopes to evaluate the relative contribution of several PES and continental shelf regions to recruitment of Patagonian grenadier, one of the most abundant groundfishes in the area. Seawater chemistry confirmed that δ~(13)C and δ~(18)O differentiated these nursery and feeding regions. Estimated recruitments from PES nurseries to adult feeding regions were important (10-35%), but lower than dominant contributions from shelf nurseries (64-85%). Stable isotope differences within otoliths indicated, however, that most adults had previously used PES habitats as subadults. Adults exhibited stronger homing to feeding habitats in the PES than to shelf regions, suggestive of seasonal site fidelity or partial migration behaviours. The proximity of principal spawning areas to the bifurcation of the West Wind Drift Current may cause large interannual and decadal variations in larvae transport and the relative contribution of different shelf and PES nurseries to recruitment.
机译：巴塔哥尼亚内海（PES）毗邻智利狭长的大陆架，是世界上最大，最复杂的河口系统之一。 PES栖息着大量的重要底层鱼类的幼鱼和成年鱼类，这些鱼类在其内部或附近产生。主流观点是，招聘主要来自此处而不是邻近的沿海地区。我们使用了耳石稳定同位素来评估几个PES和大陆架区域对巴塔哥尼亚手榴弹兵（该地区最丰富的底层鱼类之一）招募的相对贡献。海水化学证实了δ〜（13）C和δ〜（18）O区分了这些育苗区和摄食区。从PES苗圃到成年饲养区的估计招聘很重要（10-35％），但低于架子苗圃的主要招聘（64-85％）。耳石内部同位素的稳定差异表明，大多数成年人以前曾将PES生境用作亚成体。成年动物对PES觅食生境的归巢比对架子地区的归巢更强，表明季节性地点保真度或部分迁徙行为。主要产卵区域靠近西风漂移流的分支可能会导致幼虫运输的年际和年代际变化以及不同架子和PES苗圃对招募的相对贡献。

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  • 来源
    《ICES Journal of Marine Science》 |2014年第2期|374-390|共17页
  • 作者

    Edwin J. Niklitschek; David H. Secor; Pamela Toledo; Ximena Valenzuela; Luis A. Cubillos; Alejandro Zuleta;

  • 作者单位

    Universidad de Los Lagos, i～mar Centre, Camino a Chinquihue Km. 6, Puerto Montt 5502764, Chile,Universidad Austral de Chile, Trapananda Centre, Camino a Coyhaique Alto, Coyhaique 5950000, Chile;

    University of Maryland Center for Environmental Science, Chesapeake Biological Laboratory, 1 Williams St., Solomons MD 20688, USA;

    Universidad de Los Lagos, i～mar Centre, Camino a Chinquihue Km. 6, Puerto Montt 5502764, Chile;

    Universidad Austral de Chile, Trapananda Centre, Camino a Coyhaique Alto, Coyhaique 5950000, Chile;

    Universidad de Conception, Department of Oceanography, Barrio Universitario, Conception 4070386, Chile;

    Fisheries Studies Centre (CEPES), Perez Valenzuela 1276, Providencia 7500562, Chile;

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  • 正文语种 eng
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  • 关键词

    hoki; Macruronus magellanicus; mixture models; otolith microchemistry; recruitment;

    机译：ki麦哲伦Macruronus magellanicus;混合模型耳石微化学;招募;

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