As live release black bass (Micropterus spp.) tournaments increase in popularity, stress associated with live-well confinement may result in increased mortality rates. Variation in number of bass in tournament angler live-wells is common due to a suite of factors (e.g., regulations, number of anglers per boat, angler success), but the effect on delayed tournament mortality relative to other environmental factors is unknown. Largemouth bass Micropterus salmoides were collected and tagged following tournament weigh-ins (n = 80) and monthly electrofishing events (n = 15) in 2018 and 2019 at Brushy Creek Lake, Iowa, USA. A Cormack-Jolly-Seber model in Program MARK was used to evaluate the duration of reduced post-tournament survival (0–7 day) and the effects of number of bass per live-well (1–15 individuals) compared to environmental covariates (air and water temperature) and bass total length on post-tournament survival. Models indicated bass survival was reduced for three days following tournament capture and was negatively related to water temperature, number of bass in live-well, and number of initial tournament mortalities. Largest effects of all covariates on tournament survival occurred at high water temperatures but were reduced at cooler water temperatures. Daily survival probability ranged from 0.9792 (95 % CI: 0.9757, 0.9822) at 5.71 °C to 0.8927 (95 % CI: 0.8720, 0.9103) at 28.79 °C on day of tournament capture. Survival also decreased from 0.9819 (95 % CI: 0.9592, 0.9921) with one bass in the live-well to 0.9632 (95 % CI: 0.4167, 0.9990) with fifteen bass in the live-well. However, the effect number of bass in a live-well has on overall tournament survival is likely minimal due to the infrequency ten or more bass were confined per live-well. Our study provides information on the effect number of bass in a live-well has on post-release tournament survival while providing management insights to improve post-tournament survival for recreational bass fisheries.

随着现场释放黑鲈（Micropterus spp.）锦标赛越来越受欢迎，与现场隔离相关的压力可能会导致死亡率增加。由于一系列因素（例如，规定、每艘船的垂钓者数量、垂钓者成功率），锦标赛垂钓者生活井中鲈鱼数量的变化很常见，但与其他环境因素相关的延迟锦标赛死亡率的影响尚不清楚。大口黑鲈Micropterus salmoides在 2018 年和 2019 年在美国爱荷华州 Brushy Creek 湖举行的锦标赛称重 (n = 80) 和每月电钓活动 (n = 15) 之后，收集并标记了它们。与环境协变量相比，Program MARK 中的 Cormack-Jolly-Seber 模型用于评估赛后存活率降低的持续时间（0-7 天）以及每个活井（1-15 个人）的低音数量的影响（空气和水温）和低音总长度对赛后生存的影响。模型表明，捕获锦标赛后三天的鲈鱼存活率降低，并且与水温、活井中的鲈鱼数量和初始锦标赛死亡率呈负相关。所有协变量对锦标赛生存率的最大影响发生在高水温下，但在较低水温下降低。每日生存概率范围为 0。9792 (95 % CI: 0.9757, 0.9822) 在 5.71 °C 到 0.8927 (95 % CI: 0.8720, 0.9103) 在 28.79 °C 在比赛捕获当天。存活率也从 0.9819 (95 % CI: 0.9592, 0.9921) 在活井中有 1 条鲈鱼降低到 0.9632 (95 % CI: 0.4167, 0.9990)，在活井中有 15 条鲈鱼。然而，由于每个 live-well 限制了十个或更多低音的频率，所以 live-well 中的低音数量对整体锦标赛生存率的影响可能很小。我们的研究提供了关于活井中鲈鱼数量对释放后锦标赛生存率的影响的信息，同时提供了管理见解，以提高休闲鲈鱼渔业的赛后生存率。9921）在活井中有 1 个低音到 0.9632（95 % CI：0.4167，0.9990），在活井中有 15 个低音。然而，由于每个 live-well 限制了十个或更多低音的频率，所以 live-well 中的低音数量对整体锦标赛生存率的影响可能很小。我们的研究提供了关于活井中鲈鱼数量对释放后锦标赛生存率的影响的信息，同时提供了管理见解，以提高休闲鲈鱼渔业的赛后生存率。9921）在活井中有 1 个低音到 0.9632（95 % CI：0.4167，0.9990），在活井中有 15 个低音。然而，由于每个 live-well 限制了十个或更多低音的频率，所以 live-well 中的低音数量对整体锦标赛生存率的影响可能很小。我们的研究提供了关于活井中鲈鱼数量对释放后锦标赛生存率的影响的信息，同时提供了管理见解，以提高休闲鲈鱼渔业的赛后生存率。