The Antarctic toothfish (Dissostichus mawsoni) is an important fishery species widely distributed in the Southern Ocean, especially in areas covered by sea ice. Understanding fish distributions and life cycles, including the transport and survival of eggs and larvae, is essential for the assessment and sustainable management of the fishery. However, owing to difficulties with in situ winter observations, information on the early life stages of D. mawsoni is lacking. Here, we investigated the transport pathways of fish eggs and larvae through a particle tracking study, using satellite-derived ocean surface velocities in the East Antarctic region, which includes important D. mawsoni habitats and exploratory fisheries. Our results indicate that particles released from continental slopes are more likely to be successfully transported to suitable settlement grounds than those released from the BANZARE Bank (the southern region of the Kerguelen Plateau), which is situated further north and has been hypothesized to be a potential spawning ground for D. mawsoni. This study demonstrates successful source–settlement connections in relation to ocean recirculation and suggests important settlement regions for D. mawsoni larvae in the East Antarctic region.

中文翻译：

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南极东部地区南极牙鱼（Dissostichus mawsoni）的卵和幼虫运输路径建模：成功运输连接的新见解

南极齿鱼（Dissostichus mawsoni）是一种重要的渔业物种，广泛分布于南大洋，尤其是在海冰覆盖的地区。了解鱼类的分布和生命周期，包括卵和幼虫的运输和存活，对于渔业的评估和可持续管理至关重要。然而，由于现场冬季观测的困难，缺乏关于D. mawsoni早期生命阶段的信息。在这里，我们通过粒子追踪研究调查了鱼卵和幼虫的运输途径，在南极东部地区使用卫星衍生的海洋表面速度，其中包括重要的D. mawsoni栖息地和探索性渔业。我们的结果表明，从大陆坡释放的颗粒比从位于更北部的 BANZARE 银行（凯尔盖朗高原的南部地区）释放的颗粒更有可能成功地输送到合适的定居点，并被假设为潜在的D. mawsoni 的产卵场。这项研究证明了与海洋再循环相关的成功源-聚落联系，并提出了南极东部地区D. mawsoni幼虫的重要聚居区。