Population dynamics of <i>Turbo militaris</i> (Gastropoda: Turbinidae) on rocky shores in a subtropical marine park: implications for management

Understanding the relative impacts of harvesting across an area such as a marine park is vital if the goals of fisheries management are to be met. Given their accessibility, densities of targeted intertidal turbinids should be relatively simple to quantify; however, natural spatial and temporal variability in these populations has hampered this effort. This study aimed to quantify short-term population dynamics of <i>Turbo militaris</i> in relation to current zoning regulations and accessibility. While our results reflected the variability found by other studies, we also detected significantly lower densities at a headland where harvesting is known to occur, and found a trend towards denser aggregations at more remote locations. Importantly, we found that densities at some locations were so low that current fisheries bag limits may be ineffective for protecting populations at local scales. Comparisons between study sites suggest a combination of no-take zoning and inaccessibility may provide the most effective protection for this species. However, a greater understanding of the wider impacts of harvesting, and processes affecting recovery, are essential to ensure sustainable management of this fishery.

若要达成渔业管理的既定目标，明确捕捞活动在诸如海洋公园（marine park）等区域内的相对影响至关重要。鉴于目标潮间带钟螺科（Turbinidae）物种易于被观测接触，对其种群密度进行量化本应相对简单；但这类种群自然存在的空间与时间变异性却给该工作带来了阻碍。本研究旨在结合现行区划管理制度与栖息地可及性特征，量化强壮钟螺（*Turbo militaris*）的短期种群动态。尽管本研究结果印证了其他研究所发现的变异性特征，但我们也在一处已知存在捕捞活动的海岬区域观测到了显著更低的种群密度，同时发现栖息地越偏远，种群聚集密度越高的趋势。尤为关键的是，部分区域的种群密度极低，以至于现行渔业捕捞限额制度或许无法在局地尺度上为该种群提供有效保护。对研究样地的对比分析显示，禁捕区划与栖息地难以抵达的双重条件，或许能为该物种提供最为有效的保护。不过，若要保障该渔业的可持续管理，仍需进一步深入理解捕捞活动的全域影响以及影响种群恢复的各类过程。

搜集汇总

背景与挑战

背景概述

该数据集聚焦于亚热带海洋公园中Turbo militaris（一种腹足类螺类）的种群动态研究，旨在评估捕捞活动对种群密度的影响。研究发现，捕捞活动导致某些地点种群密度显著降低，当前渔业管理措施（如捕捞限额）可能不足以保护局部种群，建议结合禁捕区和区域难以到达性来提供更有效保护。数据集包含相关图像文件，发布于2015年，关键词涉及密度、管理、捕捞等主题。