The deep-sea red and blue shrimp Aristeus antennatus is a commercially valuable species that occurs in the northwestern Mediterranean Sea where ripe females have been found in fishing areas. In the Palamós harbor, a local management plan restricts fishing in certain locations to sustain the resource. However, little is known about the dispersal of larvae; specifically, it is not known how far larvae are transported from spawning locations and if there could be mixing of larvae between different fishing areas. The objective of this study was to estimate the spawning sites of larvae collected at 35 sampling stations, evaluate uncertainty in the estimates, and determine if larvae could be exchanged between fishing areas. The spawning sites of larvae were estimated by backward simulation of larval trajectories using a 3-dimensional coupled hydrodynamic and Lagrangian transport model. The backtracked larvae were assigned temperature-dependent stage durations based on a literature review of similar species. Results of model simulations indicated that the median distances from sampling to spawning locations were 11 and 38 km when shortest and longest pelagic durations (PD) were implemented, respectively. Sensitivity studies of backward trajectories showed that distance estimates could vary by as much as 27, 3, and 8 km due to differences in simulated PD, sub-grid-scale turbulence, and advection, respectively. Larvae from 13 of the 35 sampling stations were tracked back to multiple fishing grounds, suggesting that mixing of larvae from different fishing areas could occur. For example, for the sampling stations within the restricted area of Palamós, 35% of simulated larvae came from the restricted area itself, and 0.9% and 10% of larvae came from neighboring areas to the north and south, respectively. These results suggest that larval transport may connect subpopulations of A. antennatus across different fishing areas, an idea that may help inform regional management plans.

深海红蓝虾Aristeus天线是一种具有商业价值的物种，出现在地中海西北部，在那里的捕鱼区发现了成熟的雌性。在帕拉莫斯港，当地管理计划限制在某些地点捕鱼以维持资源。然而，人们对幼虫的传播知之甚少。具体而言，不知道幼体从产卵地点运输多远，以及不同捕捞区之间是否可能存在幼体混合。本研究的目的是估计在 35 个采样站收集的幼虫的产卵地点，评估估计的不确定性，并确定是否可以在捕鱼区之间交换幼虫。幼虫的产卵地点是通过使用 3 维耦合水动力和拉格朗日传输模型对幼虫轨迹进行反向模拟来估计的。根据对类似物种的文献综述，回溯的幼虫被分配了与温度相关的阶段持续时间。模型模拟结果表明，在实施最短和最长远洋持续时间 (PD) 时，从采​​样到产卵地点的中位距离分别为 11 和 38 公里。后向轨迹的敏感性研究表明，由于模拟 PD、亚网格尺度湍流和平流的差异，距离估计值可能会分别相差 27、3 和 8 公里。来自 35 个采样站中的 13 个的幼体被追踪到多个渔场，这表明来自不同捕捞区的幼体可能发生混合。例如，对于Palamós禁区内的采样站，35%的模拟幼虫来自禁区本身，0. 9% 和 10% 的幼虫分别来自北部和南部的邻近地区。这些结果表明幼虫运输可能连接亚群A.跨越不同捕鱼区的触角，这一想法可能有助于为区域管理计划提供信息。