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首页> 外文期刊>North American Journal of Fisheries Management >Estimating Regional Fishing Mortality for Freshwater Systems: a Florida Largemouth Bass Example
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Estimating Regional Fishing Mortality for Freshwater Systems: a Florida Largemouth Bass Example

机译：估计淡水系统的区域捕捞死亡率：佛罗里达大嘴鲈鱼的例子

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摘要

Species-specific harvest regulations in recreational fisheries are commonly applied regionally to protect stocks from overharvest and satisfy a diverse set of anglers. While setting regulations is a complex task and may incorporate the best available social and biological information, fisheries managers commonly obtain directed fishing mortality estimates within a single lake and then assume similar rates among other systems when setting regional harvest regulations. Thus, there is a need to assess regional levels of fishing mortality for informed use of regionally applied regulations. We implemented a practical method for assessing catch and harvest for a recreational fishery across a broad spatial region. We used a passive tag-reward study design and a regional management regulation area for Florida Largemouth Bass Micropterus salmoides floridanus in central Florida as our case study. The estimated fishing mortality rate included both harvest and deaths due to catch and release. We found overall regional fishing mortality for Florida Largemouth Bass in central Florida was relatively low. From the 247 dart tags returned, the mean annual instantaneous total fishing mortality rate was 0.11 (95% credible interval = 0.08-0.15). We also found fishing mortality rates did not vary with lake size or fish total length. Our study design did not provide mortality estimates for any specific lake due to a low number of tagged fish per lake, but the method could be used to elucidate the effectiveness of regulations that are applied at a regional scale.
机译：休闲渔业中特定物种的捕捞法规通常在区域内应用，以保护种群免于过度捕捞并满足各种垂钓者的需求。虽然制定法规是一项复杂的任务，并且可能会结合最佳的社会和生物学信息，但是渔业管理人员通常会在单个湖泊中获得定向的捕鱼死亡率估算，然后在制定区域收获法规时在其他系统中采用相似的比率。因此，有必要评估区域捕捞死亡率水平，以便在适当情况下使用区域适用的法规。我们实施了一种实用的方法来评估广阔空间区域中休闲渔业的捕捞和收获。我们使用了被动标签奖励研究设计和佛罗里达州中部的佛罗里达大嘴鲈鱼小鲑鱼的区域管理法规区域作为案例研究。估计的捕捞死亡率包括收获和因捕捞和释放造成的死亡。我们发现佛罗里达州中部的佛罗里达大嘴鲈鱼的总体区域捕鱼死亡率相对较低。从返回的247个飞镖标签中，平均年度瞬时总捕鱼死亡率为0.11（95％可信区间= 0.08-0.15）。我们还发现，捕鱼死亡率不会随湖泊大小或鱼类总长而变化。由于每个湖中标记鱼的数量较少，我们的研究设计未提供任何特定湖泊的死亡率估算，但该方法可用于阐明在区域范围内实施的法规的有效性。

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