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首页> 外文期刊>North American Journal of Fisheries Management >Influence of Smallmouth Bass Predation on Recruitment of Age-0 Yellow Perch in South Dakota Glacial Lakes
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Influence of Smallmouth Bass Predation on Recruitment of Age-0 Yellow Perch in South Dakota Glacial Lakes

机译：南达科他州冰川湖小嘴鲈捕食对0岁黄河鲈招募的影响

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摘要

We estimated the influence of predation by Smallmouth Bass Micropterus dolomieu on recruitment of age-0 Yellow Perch Perca flavescens in two northeastern South Dakota glacial lakes. We estimated a likely range in consumption of age-0 Yellow Perch using Smallmouth Bass diet information from two time periods when age-0 Yellow Perch constituted high (2008) and low (2012 and 2013) proportions of Smallmouth Bass diets, and bass population size estimates as inputs in a bioenergetics model. The proportion of age-0 Yellow Perch consumed by the Smallmouth Bass populations was determined by comparing estimates of consumption with estimates of age-0 perch production. During 2008, age-0 Yellow Perch constituted between 0% and 42% of Smallmouth Bass diets by weight, whereas during 2012 and 2013, age-0 perch constituted between 0% and 20% of bass diets by weight. Across both lakes and time periods, production of age-0 Yellow Perch ranged from 0.32 to 1.78 kg.ha(-1).week(-1). Estimates of Smallmouth Bass consumption measured during the same intervals ranged from 0.06 to 0.33 kg.ha(-1).week(-1), equating to consumption of between 1% and 34% of the available Yellow Perch biomass. Given current conditions relative to Smallmouth Bass abundance and consumption dynamics and production of age-0 Yellow Perch, it does not appear that Smallmouth Bass predation acts as a singular factor limiting recruitment of age-0 Yellow Perch in our study lakes. However, future research and management initiatives should recognize that the long-term impact of Smallmouth Bass predation is not static and will likely fluctuate depending on environmental (e.g., temperature) and biotic (e.g., trends in macrophyte abundance, predator and prey population structure and abundance, and predatory fish assemblage dynamics) characteristics.
机译：我们估算了南达科他州东北部两个冰川湖中小口鲈微捕食者dolomieu捕食对募集0岁黄鲈Perca flavescens的影响。我们使用小嘴鲈鱼饮食信息估计了两个年龄段的0岁黄鲈的可能消费范围，这两个时间段是0岁黄鲈构成小嘴鲈饮食的高比例（2008年）和低比例（2012年和2013年），以及鲈鱼种群数量估计作为生物能学模型的输入。通过比较消费估算值与0岁鲈鱼产量估算值，可以确定小嘴鲈鱼种群所消耗0岁黄鲈的比例。在2008年期间，0岁黄鲈占体重的Smallmouth Bass饮食的0％至42％，而在2012年和2013年期间，0岁黄鲈占体重的0％至20％的鲈鱼饮食。在整个湖泊和不同时期，0龄黄鲈的产量范围为0.32至1.78 kg.ha（-1）.week（-1）。在相同的时间间隔内测得的小嘴鲈鱼消耗量估计在0.06至0.33 kg.ha（-1）.week（-1）之间，相当于消耗的黄鲈生物量的1％至34％。考虑到当前与小嘴鲈的丰度和消费动态以及0岁黄鲈的产生有关的条件，在我们的研究湖泊中，小嘴鲈的捕食似乎并不能作为限制0岁黄鲈招募的唯一因素。但是，未来的研究和管理计划应认识到，小嘴鲈鱼的长期影响不是一成不变的，它可能会根据环境（例如温度）和生物（例如大型植物的丰度，捕食者和猎物的种群结构以及丰度和掠食性鱼类种群动态）特征。

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