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首页> 外文期刊>North American Journal of Fisheries Management >Mortality, Dispersal, and Habitat Use of Stocked Juvenile Muskellunge in Two Western North Carolina Rivers
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Mortality, Dispersal, and Habitat Use of Stocked Juvenile Muskellunge in Two Western North Carolina Rivers

机译：在北卡罗来纳河西方北卡罗来纳河河的库存少年麝香山的死亡率，分散和栖息地使用

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The Muskellunge Esox masquinongy is a highly sought-after sport fish that is native to the Tennessee River drainage of western North Carolina. After the extirpation of Muskellunge from North Carolina in the 1950s, the North Carolina Wildlife Resources Commission began a stocking program to re-establish the species and produce viable Muskellunge fisheries in North Carolina. Although stocking efforts have created a Muskellunge fishery in, for example, the French Broad River (where the species was native), there is little evidence of success in North Carolina sections of the New River (where the species was not native). Possible mechanisms inhibiting stocking success are unclear because there is relatively little information available on the juvenile life stage of the Muskellunge, especially in the southern portion of its distribution. We addressed the perceived differences in recruitment between the two fisheries by using telemetry to investigate dispersal, mortality, and habitat use by stocked juvenile Muskellunge. Fifty hatchery-reared, age-0 Muskellunge (282-307 mm TL) were tagged prior to stocking in the New River (fall 2013) and French Broad River (fall 2014). Three months after stocking, known survival of tagged fish was 4% in the New River and 29% in the French Broad River; the survival probability after 3 months was estimated at 9% (range = 4-17%) in the New River and 37% (range = 25-56%) in the French Broad River. Extended survival in the French Broad River was 14% at 252 d poststocking. High dispersal was observed, with maximum individual dispersal of 67.4 km in the New River and 55.5 km in the French Broad River. Habitat suitability analyses indicated that juvenile Muskellunge in the FBR selected shallow nearshore areas with low water velocity, fine substrate, and substantial cover in the form of woody debris and overhanging vegetation. Information on the survival and behavior of stocked Muskellunge can facilitate efforts to successfully manage these fisheries.
机译：Muskellunge Esox Masquinongy是一个备受追捧的体育鱼，原产于西北卡罗莱纳州田纳西河排水。北卡罗来纳州野生动物资源委员会从北卡罗来纳州从北卡罗来纳灭绝后，开始了一项储存计划，重新建立了物种，在北卡罗来纳州生产可行的穆斯克别墅渔业。虽然库存努力已经在例如法国宽阔的河流中创造了麝香植物渔业（物种是本地人），但新河北卡罗来纳州的北卡罗来纳州部分成功的证据很少（物种不是本地人）。抑制库存成功的可能机制尚不清楚，因为在麝香的少年生命阶段上有相对较少的信息，特别是在其分布的南部。我们通过使用遥测来调查分散，死亡率和栖息地使用库存少年Muskellunge来解决两次渔业之间的招聘差异。在新河流放养之前（2013年秋季）和法国宽河（2014年秋季）之前标记了五十岁的孵化器饲养了岁月（282-307毫米TL）。在股票后三个月，新的河流中已知的被标记的鱼生存率为4％，法国宽阔的河流中有29％;在新河中估计3个月后的存活概率为9％（范围= 4-17％），在法国宽河中达到37％（范围= 25-56％）。法国宽河的延长生存率为252米的宽阔的河流占地14％。观察到高分散，最大单独的分散在新河中67.4公里，法国宽阔的河流55.5公里。栖息地适用性分析表明，FBR中的少年麝香术在浅近岸区域，具有低水速，精细基板和木质碎片形式的实质封面和悬垂植被。有关库存Muskellunge的生存和行为的信息可以促进成功管理这些渔业的努力。

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