Octopus insularis, despite being widely fished from Brazil to Mexico, has only recently been described as a different species from the sympatric Octopus vulgaris complex in the tropical Atlantic, where its occurrence is determined by different environmental factors. Using a 10-year time series from Brazil, we modeled how topographic aspects and oceanographic variables affected the landings of O. insularis. For that we used a locally weighted scatterplot smoothing (LOESS) technique and residual autocovariate-boosted regression trees (RAC-BRTs). In addition to the octopus landing per unit effort (LPUE) being driven by the seafloor structure, we also observed that it was directly related to the temperature and inversely related to chlorophyll. Higher LPUEs were observed in warmer years. Although the relationship between LPUE and chlorophyll or temperature has not yet been explained under laboratorial conditions, the higher catches observed at higher temperatures may be both a result of the local fishing dynamics and a warning toward the possibility of future niche expansion, due to climate change. If the latter is confirmed, octopus fisheries in parts of the South Atlantic would need to adapt to a smaller, and thus cheaper, body-sized species.

中文翻译：

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海洋因素导致的海岛章鱼年际捕捞变化（Leite & Haimovici 2008）

八达通insularis，尽管来自巴西被广泛捕捞到墨西哥，最近才被描述为同域不同的物种普通章鱼热带大西洋，在其发生是由不同的环境因素决定的复杂。使用来自巴西的 10 年时间序列，我们模拟了地形方面和海洋变量如何影响O的着陆。 岛国. 为此，我们使用了局部加权散点图平滑 (LOESS) 技术和残差自协变量增强回归树 (RAC-BRT)。除了由海底结构驱动的章鱼每单位努力（LPUE）着陆之外，我们还观察到它与温度直接相关，与叶绿素呈负相关。在温暖的年份观察到更高的 LPUE。虽然在实验室条件下尚未解释 LPUE 与叶绿素或温度之间的关系，但在较高温度下观察到的较高捕获量可能既是当地捕捞动态的结果，也是对未来生态位扩张可能性的警告，由于气候变化. 如果后者得到证实，南大西洋部分地区的章鱼渔业将需要适应体型更小、因此更便宜的物种。