Excessive fishing pressure can induce population declines or complete collapse of fisheries. Unless commercial and recreational fisheries for K‐selected fishes, or those with slow growth and late maturation, are carefully managed, declines in abundance or fishery collapse is probable. Paddlefish Polyodon spathula,are a K‐selected species that experienced historical declines in abundance as a result of habitat degradation and overfishing. Mark‐recapture studies are well‐suited for long‐lived fishes by providing information on population density and vital rates. For sustainable commercial or recreational fisheries targeting species such as the paddlefish, managers require accurate estimates of population vital rates including survival, abundance, and exploitation. We used a Montana Fish, Wildlife & Parks (MFWP) mark‐recapture dataset and modified Jolly‐Seber (POPAN) models to estimate survival, recapture, probability of entry, and abundance of 8,518 tagged paddlefish over a 25‐year period. With many supporting estimates including stable survival (0.92 for females, mean of 0.82 for males), low exploitation rates (means of 2.6% for females and 2.9% for males), and stable abundance estimates (25‐year mean of 12,309 individuals for both sexes), the Fort Peck paddlefish population appears to be stable and well‐managed over the past 25 years. Presently, this is the only study focused on paddlefish in North America that has estimated survival and abundance for both male and female paddlefish using contemporary analyses. This research provided a unique opportunity to highlight that the effort exerted by management agencies to collect long‐term field data is extremely useful to our understanding of fish populations and management.

中文翻译：

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密苏里河上的Fort Peck dle鱼种群生存和丰富度

过度的捕捞压力可能导致人口减少或渔业完全崩溃。除非精心管理K选鱼类的商业和休闲渔业，或那些生长缓慢且成熟较晚的鱼类，否则丰度可能下降或渔业崩溃。匙吻Poly Polyodon spathula，是K选择的物种，由于栖息地退化和过度捕捞而经历了丰度的历史下降。通过提供有关种群密度和生命率的信息，标记捕获研究非常适合长寿鱼类。对于以划桨鱼等物种为目标的可持续商业或休闲渔业，管理人员需要准确估算种群的生存率，包括生存，丰度和开发。我们使用蒙大拿州鱼类，野生动植物和公园（MFWP）标记捕获数据集和改良的Jolly-Seber（POPAN）模型来估计25年期间的8,518个带标记的dle鱼的生存，捕获，进入的可能性和丰富度。有许多支持性估算，包括稳定的生存率（女性为0.92，男性为0.82），低剥削率（女性为2.6％，平均为2。雄性为9％），并且估计的丰度稳定（男女平均25年平均值为12,309人），在过去25年中，Fort Peck dle鱼种群似乎稳定且管理良好。目前，这是北美地区唯一针对鳞甲鱼的研究，使用当代分析估计了雌性鳞甲鱼的生存和丰度。这项研究提供了一个独特的机会，可以强调管理机构为收集长期实地数据而付出的努力对于我们对鱼类种群和管理的理解极为有用。这是北美地区唯一一项针对pad鱼的研究，该研究使用当代分析方法对雌性和dle鱼的生存和丰度进行了估算。这项研究提供了一个独特的机会，可以强调管理机构为收集长期实地数据而付出的努力对于我们对鱼类种群和管理的理解极为有用。这是北美地区唯一一项针对pad鱼的研究，该研究使用当代分析方法对雌性和dle鱼的生存和丰度进行了估算。这项研究提供了一个独特的机会，可以强调管理机构为收集长期实地数据而付出的努力对于我们对鱼类种群和管理的理解极为有用。