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首页> 外文期刊>North American Journal of Fisheries Management >A Comparison of Sampling Gears for Capturing Juvenile Silver Carp in River-Floodplain Ecosystems
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A Comparison of Sampling Gears for Capturing Juvenile Silver Carp in River-Floodplain Ecosystems

机译：捕捉河流生态系统中少年银鲤鱼的采样齿轮的比较

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摘要

Effective management and monitoring programs require confidence regarding basic biological sampling. Gear comparisons are often required to determine the most effective techniques. Such is the case for populations of invasive Asian carps Hypophthalmichthys spp., which have recently occurred in large numbers throughout sections of the Mississippi River basin. We tested five gears (mini-fyke nets, beach seine, purse seine, pulsed-DC electrofishing, and gill net) that targeted juvenile (age 0) Silver Carp H. molitrix at sites along the Illinois River during 2014 and 2015 to determine the most effective ones for age-0 Silver Carp. We considered the most cost-effective gear to be the one that provided the largest catch at a minimal expenditure of labor. Mini-fyke nets were the most effective at collecting large numbers of age-0 Silver Carp, followed in decreasing order by beach seines, pulsed-DC electrofishing, purse seines, and gill nets. The smallest Silver Carp were caught in beach seines and the largest were caught in gill nets, and there was considerable variation in size distributions among gears. However, when we considered cost-effectiveness in terms of labor hours for each gear, both beach seines and mini-fyke nets had similar and overlapping labor expenditures. Gill nets and purse seines were not cost-effective, as they required more labor and had lower overall catch rates.
机译：有效的管理和监测计划需要对基本生物取样的信心。通常需要齿轮比较来确定最有效的技术。这种侵入性亚洲鲤鱼次耳疗症的案例是最近在密西西比河流域的各个部分发生的大量发生。我们测试了五个齿轮（迷你Fyke网，海滩，Purse Seine，Pulsed-DC电捕捉和鳃网），其在2014年和2015年期间沿着伊利诺伊州河沿着伊利诺伊州河沿岸的少年（年龄0）Silver Carp H. Molitrix来确定最有效的Age-0 Silver Carp。我们认为最具成本效益的齿轮是提供最大劳动力的最大捕获的装备。 Mini-Fyke网是收集大量龄-0银鲤鱼最有效的，随后逐渐减少海滩街道，脉冲直流电泳，钱包和鳃网。最小的银色鲤鱼被捕获在海滩赛道中，最大的速度夹在鳃网中，齿轮之间的尺寸分布相当大。然而，当我们考虑每个齿轮的劳动力时代的成本效益时，海滩都有类似和重叠的劳动力支出。 Gill网和Purse Seines没有成本效益，因为它们需要更多的劳动力，并且整体捕获率较低。

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