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首页> 外文期刊>North American Journal of Fisheries Management >Comparison of Three Methods for Sampling Panfish in Iowa Impoundments
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Comparison of Three Methods for Sampling Panfish in Iowa Impoundments

机译：IOWA蓄水池中采样三种方法的比较

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摘要

Science-based decision making in fisheries management requires the collection of sampling data with the acknowledgment that all gears have inherent sampling biases. Fyke nets are a common tool for sampling panfish. However, recent evaluations suggest hoop nets are more effective for evaluating these populations. We compared panfish relative abundance, size structure, condition, sampling effort to capture 100 individuals, and sampling precision for small (61 x 122-cm frames) and large (91 x 183-cm frames) fyke nets soaked for 24 h and tandem hoop nets soaked for 72 h during spring and fall. Hoop nets and large fyke nets captured more Bluegills Lepomis macrochirus, Black Crappies Pomoxis nigromaculatus, and White Crappies P. annularis than did small fyke nets, but catch rates for Redear Sunfish L. microlophus were similar among gear types. Bluegills captured in hoop nets were generally longer than those captured in small or large fyke nets, but the length of other panfish was similar among gears. Bluegill size structure was generally largest and Black Crappie size structure was generally smallest in hoop nets compared with that in fyke nets. Relative weight was greater for Bluegills captured in small fyke nets and was higher in the spring than fall. Hoop nets generally captured more panfish with fewer net sets and with greater precision than did small or large fyke nets, providing an additional tool for fisheries biologists for population assessments.
机译：渔业管理中的基于科学的决策需要将采样数据收集到所有档位具有固有的采样偏差的确认。 Fyke网是采样Panfish的常用工具。然而，最近的评估表明箍网对评估这些人口更有效。我们比较了藻鱼的相对丰富，尺寸结构，条件，采样努力，捕获了100个人，以及小（61 x 122-cm框架）和大（91 x 183-cm框架）浸泡24小时和串联箍的比例精度在春天和秋天期间浸泡72小时的网。箍网和大型FYKE网捕获了更多的Bluegills Lepomis Macrochirus，黑色疯狂pomoxis nigromaculatus，并且白色叫做P. Conularis而不是小型Fyke网，但是在齿轮类型中捕获了防晒鲸L.微援助的速率。在箍网中捕获的蓝血灯通常比在小型或大型FYKE网中捕获的蓝血管，但齿轮之间的其他藻的长度相似。 Bluegill尺寸结构通常是最大的，而黑色克拉皮尺寸结构通常在箍网中最小，而在Fyke网上比较。对于在小型FYKE网中捕获的蓝血管，相对重量更大，春季比秋天更高。箍网通常捕获更多的Panfish，净套装较少，比小或大型Fyke网更精确，为渔业生物学家提供了额外的人口评估工具。

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