Numerous stocking evaluations of pellet‐reared advanced‐fingerling (80–120 mm TL) Largemouth Bass Micropterus salmoides have assessed the contribution of stocked fish to the wild population, but few studies have quantified longer‐term (1–2 years) survival. Hatchery researchers have developed spawning Florida Largemouth Bass Micropterus salmoides floridanus (hereafter, "Florida Bass") out of season (i.e., in fall), allowing for a similar‐sized product to be stocked earlier in the spring. Managers are interested in whether poststocking survival is improved by new culture techniques and whether survival can be affected by conditioning (acclimating to the natural environment) the fish before stocking. In this study, we stocked 11 small (<100 ha) lakes in central Florida with pellet‐reared advanced‐fingerling (mean 105 mm TL) Florida Bass that were spawned out of season, and we conducted mark–recapture population estimates at 1 and 2 years poststocking to assess survival. In the second year of the study, four lakes were stocked a second time with two treatments of Florida Bass (naïve and conditioned) to test for the effects of conditioning the fish on survival within the stocked lakes in 0.1‐ha predator‐limited enclosures for 7 d. At 1 year poststocking, survival ranged from 0.0% to 8.2% (values were <2.5% for all but one lake) and averaged 1.8%. At 2 years poststocking, survival ranged from 0.0% to 2.4% and averaged 0.9%. From the restocked lakes in year 2, we found no effect of conditioning (P = 0.57) on the number of stocked Florida Bass that were caught at 1 year poststocking, and survival ranged from 0.1% to 1.5% for the naïve treatment and 0.2% to 1.4% for the conditioned treatment. Despite improved culture techniques and the attempt to acclimate the stocked fish to the wild, survival averaged <2% at 1 year poststocking. Knowledge of projected Florida Bass survival can help managers make informed stocking decisions that are more likely to meet their desired outcome.

中文翻译：

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小佛罗里达湖中饲养的佛罗里达大嘴鲈鱼高级成鱼的生存

大量对颗粒养殖的高级成鱼（80–120 mm TL）大嘴鲈鱼小鳍金枪鱼的放养评估评估了放养鱼类对野生种群的贡献，但很少有研究量化长期（1-2年）生存。孵化场的研究人员已经开发出产卵的佛罗里达大嘴鲈鱼Micropterus salmoides floridanus（以下称“佛罗里达鲈鱼”）过时（即秋季），从而可以在春季早些时候库存类似尺寸的产品。管理者关注的是新养殖技术是否能改善放养后的存活率，以及放养前对鱼的适应（适应自然环境）是否会影响存活率。在这项研究中，我们在佛罗里达州中部放养了11个小型（<100公顷）湖泊，这些鱼类带有过时产卵的先进捕捞（平均105毫米TL）佛罗里达鲈鱼，我们在1和1时进行了标记捕获人口估计。放养后2年评估生存率。在研究的第二年，第二次放养了四个湖泊，对佛罗里达州的巴斯进行了两次处理（幼稚和适应），以测试养护鱼类对放养湖泊中0生存的影响。1公顷捕食者限定的外壳，持续7天。放养1年后，存活率范围为0.0％至8.2％（除一个湖泊外，其他所有物种的生存率均<2.5％），平均为1.8％。放养2年后，存活率从0.0％到2.4％不等，平均为0.9％。从第2年放养的湖泊中，我们没有发现调节的影响（P  = 0.57），即在放养1年后被捕捞的佛罗里达鲈鱼的数量，对于幼稚的治疗，生存率为0.1％至1.5％；对于经过条件处理的治疗，生存率为0.2％至1.4％。尽管改良了养殖技术，并尝试使放养的鱼适应野外，但放养后一年的平均成活率不到2％。了解佛罗里达鲈鱼的预计生存情况可以帮助管理人员做出更明智的放养决策，从而更有可能实现预期的结果。