The black-lipped pearl oyster (Pinctada margaritifera) is extensively farmed in French Polynesia to produce black pearls. For a sustainable management of marine resources, studying interactions between organisms and environment, and the associated factors and processes that will impact their life cycle and thus modulate population dynamics is a major research priority. Here, we describe black-lipped pearl oyster energy acquisition and use, and its control by temperature and food concentration within the Dynamic Energy Budget (DEB) theory framework. The model parametrization was based on literature data and a specific laboratory experiment. Model validation was carried out thanks to historical in-situ datasets and a dedicated field survey. Three theoretical environmental scenarios were built to investigate the response of the pearl oyster to environmental variations. We successfully modeled a wide range of life-stage-specific traits and processes, especially the delayed acceleration of growth after settlement. Applying the model on field data collected at three different culture sites required only one free-fitted parameter, the half saturation coefficient Xk, which controls how ingestion depends on food density. Xk integrates all variations linked to the trophic environment. Analysis of the kinetics of energy fluxes under theoretical environmental scenarios suggests that temperature variations induce seasonality of reproduction in a species thought to spawn opportunistically throughout the whole year. The major influence of food concentration fluctuations on growth rate and reproductive effort is highlighted. The model showed the lower performances associated with recovery time between food-rich and starvation periods. The implications of these findings in the context of black pearl farming in a changing environment are discussed.

中文翻译：

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环境变异对玛格丽特珠母贝生活史特征的影响：全生命周期 deb 建模方法

黑唇珍珠贝（Pinctada margaritifera）在法属波利尼西亚广泛养殖以生产黑珍珠。对于海洋资源的可持续管理，研究生物与环境之间的相互作用，以及将影响其生命周期并因此调节种群动态的相关因素和过程是一个主要的研究重点。在这里，我们描述了黑唇珍珠贝能量的获取和使用，以及它在动态能量收支 (DEB) 理论框架内通过温度和食物浓度的控制。模型参数化基于文献数据和特定的实验室实验。由于历史原位数据集和专门的现场调查，进行了模型验证。建立了三个理论环境情景来研究珍珠贝对环境变化的响应。我们成功地模拟了广泛的特定于生命阶段的特征和过程，尤其是定居后的延迟加速增长。将该模型应用于在三个不同养殖场所收集的现场数据，只需要一个自由拟合参数，即半饱和系数 Xk，它控制着摄入如何取决于食物密度。Xk 整合了与营养环境相关的所有变化。对理论环境情景下的能量通量动力学的分析表明，温度变化会导致被认为全年随机产卵的物种的繁殖季节性。突出了食物浓度波动对生长速度和繁殖努力的主要影响。该模型显示与食物丰富期和饥饿期之间的恢复时间相关的性能较低。讨论了这些发现在不断变化的环境中黑珍珠养殖的意义。