Subadult (age < 3) Red Drum Sciaenops ocellatus support a valuable recreational fishery, and mortality estimates for young Red Drum are needed for proper management. To obtain these estimates, age‐1 and age‐2 Red Drum were implanted with acoustic transmitters and external Floy tags in two coastal Alabama rivers (Fowl and Dog rivers). Fates of tagged fish were inferred from stationary receiver detections and active relocations over 1 year. These fates were used in a Bayesian multistate model to estimate instantaneous monthly and annual mortality and emigration rates for each river and overall from both rivers. Instantaneous monthly fishing mortality (F) ranged from 0.001 to 0.112 (annual F = 0.414) in Dog River, from 0.001 to 0.126 in Fowl River (annual F = 0.309), and was 0.001–0.054 (annual F = 0.337) overall. Instantaneous monthly natural mortality (M) ranged from 0.001 to 0.002 (annual M = 0.069) in Dog River, from 0.001 to 0.036 (annual M = 0.178) in Fowl River, and from 0.001 to 0.017 (annual M = 0.090) overall. The overall annual estimate of instantaneous total mortality (Z) was 0.435. The median escapement percentage was estimated at 36.3% (95% posterior credible interval = 19.5–56.0%) using M and Z from the overall model. Unfortunately, the error on this estimate was large and inconclusive as to whether the 30% escapement goal for juvenile Red Drum to the adult population from Dog and Fowl rivers is being met. Monthly residency estimates were typically greater than 0.90, and overall annual residency was estimated at 0.716. Fishing mortality estimates from the current study are higher than recent catch curve estimates that did not include young Red Drum. These results demonstrate that young Red Drum need to be accounted for when generating mortality estimates and provide needed data for the Red Drum recreational fishery.

中文翻译：

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通过声遥测估计红鼓死亡率

亚成年（年龄<3）的红鼓鲷鲷鱼支持珍贵的休闲渔业，需要对年轻的红鼓死亡率进行适当的管理。为了获得这些估算值，在两条阿拉巴马州沿海河流（禽河和狗河）中分别植入了1岁和2岁的红鼓，并装有声发射器和外部Floy标签。通过固定接收器检测和1年以上的主动搬迁，可以推断出带标签鱼的命运。这些命运被用于贝叶斯多州模型中，以估算每条河流以及两条河流总体的瞬时月和年死亡率和移民率。每月瞬时捕鱼死亡率（F）为0.001至0.112（每年F  = 在Dog River中为0.414），在Fowl River中为0.001至0.126（年度F  =  0.309），总体为0.001-0.054（年度F  =  0.337）。狗河的瞬时每月自然死亡率（M）为0.001至0.002（年M  =  0.069 ），福尔河的瞬时月自然死亡率为0.001至0.036（年M  =  0.178），总体总体为0.001至0.017（年M  =  0.090）。年度总瞬时瞬时总死亡率（Z）为0.435。使用M和Z估计的中位逃逸百分比为36.3％（后可信区间95％= 19.5-56.0％）从整体模型来看。不幸的是，这个估计的错误是巨大的，并且不确定是否满足了从Dog和Fowl河流到成年人口的幼体Red Drum的30％逃逸目标。每月居住人数估计值通常大于0.90，而总体年度居住人数估计为0.716。当前研究的捕捞死亡率估计值高于最近的捕捞曲线估计值，其中不包括年轻的红鼓。这些结果表明，在计算死亡率时需要考虑年轻的红鼓，并为红鼓休闲渔业提供所需的数据。