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首页> 外文OA文献 >Spatial distribution of Illex argentinus in San Matias Gulf (Northern Patagonia, Argentina) in relation to environmental variables: A contribution to the new interpretation of the population structuring
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Spatial distribution of Illex argentinus in San Matias Gulf (Northern Patagonia, Argentina) in relation to environmental variables: A contribution to the new interpretation of the population structuring

机译：与环境变量有关的圣马蒂亚斯海湾（阿根廷北巴塔哥尼亚）阿根廷黑Il的空间分布：对人口结构的新解释的贡献

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摘要

Traditionally, it was assumed that major spawning activity of Illex argentinus occurs in discrete pulses along the outer-shelf/slope off Argentina/southern Brazil during late-fall/winter and that early life stages develop near the Brazil–Malvinas Confluence (BMC). However, a novel hypothesis of the population structuring of the species was proposed that states that coastal waters may be important as spawning and feeding grounds. Here, we analyzed the spatial distribution of Illex argentinus inside San Matias Gulf based on the position of the CPUE of jiggers in order to improve the knowledge of the population structuring in coastal regions. Squids were mainly concentrated on the northern region of the gulf where favorable oceanographic conditions (e.g. water stratification, chlorophyll-a concentration peaks) to feeding and spawning are present. These results provided empirical evidences that individuals of I. argentinus use Argentinean coastal waters, particularly San Matias Gulf, as permanent feeding and spawning grounds which supports the new hypothesis.
机译：传统上，假定在秋季/冬季期间，阿根廷伊利克斯羊的主要产卵活动是沿着沿阿根廷/巴西南部外架/斜坡的离散脉动发生的，并且早期生命阶段在巴西-马尔维纳斯汇合处（BMC）附近发展。但是，有人提出了该物种种群结构的新假说，指出沿海水域可能是重要的产卵场和觅食场。在此，我们根据跳虫的CPUE的位置分析了圣马蒂亚斯海湾内阿根廷鸢尾的空间分布，以提高对沿海地区人口结构的了解。鱿鱼主要集中在海湾的北部地区，那里存在有利于觅食和产卵的海洋条件（例如，水分层，叶绿素a浓度峰值）。这些结果提供了经验证据，表明阿根廷鸢尾花个体使用阿根廷沿海水域，特别是圣马蒂亚斯海湾作为永久性的觅食和产卵场，这支持了新的假设。

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