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首页> 外文会议>Hugh C. Becker Memorial Muskie Symposium >Long-Term Mark-Recapture Data to Assess Muskellunge Population Characteristics: Application to Two Illinois Reservoirs
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Long-Term Mark-Recapture Data to Assess Muskellunge Population Characteristics: Application to Two Illinois Reservoirs

机译：长期标记重新捕获数据以评估Muskellunge人口特征：适用于两个伊利诺伊州水库

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Accurate estimates of growth and mortality are important for management of recreational fisheries. Accurate age estimates often require the sacrifice of fish; thus, assessments of growth and mortality rates of trophy fishes such as Muskellunge Esox masquinongy often lack sufficient data. Mark—recapture history can be used as a nonlethal alternative to estimate growth and mortality in fishes. To determine the utility of this approach, we used data from a 17-year Muskellunge mark-recapture program conducted on two Illinois reservoirs (Kinkaid Lake and North Spring Lake). Von Bertalanffy parameter estimates by sex, lake, and tag type (passive integrated transponder andT-bar anchor tags) were obtained using a novel modification of the Fabens growth model and compared to von Bertalanflfy growth estimates using known- or scale-aged fish. Mortality was calculated using both age- and length-based methods. Fabens growth model estimates of asymptotic length (Z, ) and growth coefficient (K) were within 6% (<62 mm) and 23% (<0.11) of corresponding von Bertalanffy growth model parameter estimates from known- or scale-aged fish by lake and sex. Provided that all sizes of fish are sampled, 4 years of mark-recapture data with more than 100 recaptures were foundto be sufficient to produce reliable parameter estimates. Growth parameters differed between male fish tagged with passive integrated transponder orT-bar anchor tags but did not differ by tag type for females. Differences in Muskellunge growth and mortality rates between the two study lakes suggest that changing from a regionally applied minimum length limit to lake-specific minimum length limits may be warranted. Our results highlight the feasibility of mark-recapture data as a nonlethal technique to estimate population-specific growth and mortality rates for Muskellunge and the potential value of this approach in facilitating lake-specific Muskellunge management.
机译：准确的增长和死亡率估计对娱乐渔业的管理是重要的。准确的年龄估计通常需要牺牲鱼类;因此，评估奖杯鱼类的生长和死亡率，如Muskellunge Esox Masquinongy往往缺乏足够的数据。 Mark-Recapture历史可以用作非致命的替代品来估计鱼类的生长和死亡率。要确定此方法的效用，我们将在两个伊利诺伊州储层（Kinkaid Lake和North Spring Lake）上进行的17年穆斯凯内格标志 - 重新捕获程序的数据。使用GRABES生长模型的新改性获得性别，湖泊和标签类型（被动集成转发器ANDT-BAR锚标签）的VON Bertalanffy参数估计，并与使用已知或规模老化的鱼类的Von Bertalanflfy生长估计相比。使用基于年龄和长度的方法计算死亡率。 FABENS生长模型渐近长度（Z，）和生长系数（k）的估计在6％（<62mm）内，相应的von Bertalanffy生长模型参数估计来自已知或规模的鱼的23％（<0.11）湖和性。此外，所有尺寸的鱼类都是采样的，发现4年的标记 - 重新捕获数据超过100次重新返回，足以产生可靠的参数估计。使用被动集成应答器ORT-BAR锚标标签标记的雄性鱼类之间的生长参数不同，但是对女性的标签类型没有不同。两项研究湖泊之间的Muskellunge增长和死亡率的差异表明，可能需要从区域施加的最小长度限制改变到湖泊的最小长度限制。我们的结果突出了标志 - 重新捕获数据作为非致命技术的可行性，以估算麝香山的人口特异性的生长和死亡率以及这种方法促进湖泊特定的麝香杂耍管理的潜在价值。

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