The investigation of the temporal dynamics of marine benthonic populations is an important tool to evaluate whether and how they are responding to environmental changes. Here we compared the population biology and reproduction of Hepatus pudibundus in Ubatuba Bay after a 20-year gap. The first samplings were done in September 1995 − August 1996 (hereafter 1ºP), and the second, in September 2016 − August 2017 (hereafter 2ºP). In both periods, five sites were trawled aboard a shrimp fishing boat. We captured 865 crabs in the 1ºP and 4222 in the 2ºP. The mean individual size of each demographic group, the size at the onset of sexual maturity, and the growth rate of females was lower in the 2ºP. The reproductive and recruitment periods were continuous. Our comparable data on population features taken 20-years apart showed adjustments regarding the sizes and abundance of mature individuals of H. pudibundus of Ubatuba Bay, indicating that this species is resilient to the anthropogenic impacts in the region.

海洋底栖种群时间动态的调查是评估它们是否以及如何响应环境变化的重要工具。在这里，我们比较了肝pat的种群生物学和繁殖相隔20年后，在乌巴图巴湾（Ubatuba Bay）第一次采样于1995年9月至1996年8月（以下称1ºP），第二次采样于2016年9月至2017年8月（以下称2ºP）。在这两个时期中，在虾渔船上拖曳了五个地点。我们在1ºP中捕获了865只螃蟹，在2ºP中捕获了4222只螃蟹。在2ºP中，每个人口组的平均个体大小，性成熟开始时的大小以及女性的生长率均较低。生殖和募集期是连续的。我们相隔20年的人口特征可比数据显示，乌巴图巴湾的pudibundus成熟个体的大小和丰度发生了调整，表明该物种对该地区的人为影响具有弹性。