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首页> 外文期刊>ICES Journal of Marine Science >Modelling drift of pelagic offspring: the importance of egg surveys in providing a realistic model initialization
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Modelling drift of pelagic offspring: the importance of egg surveys in providing a realistic model initialization

机译：对中上层后代漂移进行建模：鸡蛋调查在提供逼真的模型初始化中的重要性

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摘要

Having valid information about the location and dynamics of biological processes is important for coastal management. In this context modelling, the pelagic drift of early life stages has been shown to be an important tool for understanding the spatial scale of population dynamics in marine systems. Often simulated particles are released in hypothetical quantities at assumed spawning grounds with no or few field data to guide the model parametrization. In this study, we combine high-resolution field data and state-of-the-art oceanographic modelling and use a probabilistic approach to construct kernel density distributions of the dispersal of pelagic fish eggs. Specifically, the potential drift of pelagic offspring of cod (Gadus morhua) was investigated in a large, open fjord system in northern Norway by combining field observations of newly spawned cod eggs with simulations of particle movement using a semi-Lagrangian trajectory model with inputs from high-resolution hydrodynamic simulations. The larger part of the distribution of eggs after drift was located in the fjord, suggesting fjord scale recruitment dynamics. Finally, we also examined the drift of eggs released in a uniform distribution and found that lack of egg survey data gave an unrealistically large spread of egg particles within this fjord system.
机译：掌握有关生物过程的位置和动态的有效信息对于沿海管理很重要。在这种情况下，早期生命的浮游漂移已被证明是了解海洋系统人口动态空间尺度的重要工具。通常，模拟粒子在假定的产卵场以假设的数量释放，而没有或只有很少的现场数据来指导模型参数化。在这项研究中，我们结合了高分辨率的现场数据和最新的海洋学模型，并使用一种概率方法构建了中上层鱼类卵扩散的核密度分布。具体而言，在挪威北部的一个大型，开放的峡湾系统中，通过将新产的鳕鱼卵的实地观察与使用半拉格朗日轨迹模型的粒子运动模拟相结合，并利用来自高分辨率流体动力学模拟。漂移后卵的大部分分布在峡湾中，表明峡湾规模的募集动态。最后，我们还检查了以均匀分布释放的卵的漂移情况，发现缺乏卵调查数据会使该峡湾系统中的卵颗粒散布得不切实际。

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