Black bass Micropterus spp. in North America are commonly targeted by recreational anglers who are participating in catch-and-release angling tournaments. In deeper water bodies, Smallmouth Bass M. dolomieu are often caught from depths greater than 6 m and held in a boat’s live well until they are weighed in. Smallmouth Bass that are caught from such depths typically display symptoms of barotrauma, where the swim bladder becomes overinflated and the fish cannot maintain proper orientation. We examined the effects of three common practices that are used by tournament anglers who hold fish that exhibit symptoms of barotrauma: no treatment, weighted fin clips (rubber-coated weighted alligator clips), and fizzing (venting the swim bladder with a hypodermic needle). After receiving a treatment, the Smallmouth Bass were held in experimental live wells for a period of 3 h and their condition was monitored using reflex action mortality predictors. Condition declined for the Smallmouth Bass that received no treatment, whereas both fin clips and fizzing demonstrated improved fish condition. Fizzing was also found to be a more rapid and effective treatment than fin clips. As the weight and capture depth of fish in the control group increased, there was a significant decrease in final condition, as indicated by reflex impairment. For tournaments that hold fish in live wells prior to release, these results demonstrate that interventions shortly after capture can effectively reduce reflex impairment in Smallmouth Bass that experience barotrauma and that fizzing is more effective than fin clips.

中文翻译：

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垂钓者在抓放钓比赛中对经历气压伤的小口黑鲈的干预比较

黑鲈Micropterus spp。在北美，参加抓放钓比赛的休闲垂钓者通常将目标瞄准。在更深的水体中，小口黑鲈M. dolomieu通常从大于 6 m 的深度捕获并在船的活井中保持直到它们被称重。从这种深度捕获的小口黑鲈通常表现出气压伤的症状，其中鳔变得过度膨胀并且鱼无法保持正确的方向。我们检查了钓鱼比赛垂钓者使用的三种常见做法的影响，这些鱼会出现气压伤症状：不治疗、加重鳍夹（橡胶涂层加重鳄鱼夹）和嘶嘶声（用皮下注射针给鱼鳔排气） . 接受治疗后，小口黑鲈被关在实验活井中 3 小时，并使用反射动作死亡率预测器监测它们的状况。未接受治疗的小嘴黑鲈的状况下降，而鳍夹和嘶嘶声都表明鱼的状况有所改善。还发现嘶嘶声是比鳍夹更快速和有效的治疗方法。随着对照组鱼的重量和捕获深度的增加，最终条件显着下降，如反射障碍所示。对于在释放前将鱼放在活井中的比赛，这些结果表明，捕获后不久的干预可以有效地减少经历气压伤的小口黑鲈的反射障碍，并且嘶嘶声比鳍夹更有效。