Standard weight equations have been proposed for a variety of fishes, including many nongame species. Here, we developed standard weight (W_s) equations for Lake Chubsucker Erimyzon succetta using the traditional regression-line-percentile technique and the newer empirical-percentile method. Length and weight data for 19,727 Lake Chubsuckers from 8 to 42 cm TL and 129 populations were used in the final analysis. These fish were collected from 1977 to 2020 by various agency and university personnel from most known populations across the species’ range in North America. This species is considered vulnerable, imperiled, or extirpated in several Midwestern and northern states, but it appears to be secure in the Southeast. The resulting W_s equations were log₁₀W = −5.0962 + 3.1125 × log₁₀L and log₁₀W = –5.9735 + 3.8828 × log₁₀L −0.1701 × (log₁₀L)² for the RLP and quadratic empirical-percentile method techniques, respectively, where W is weight (g) and L is total length (TL, mm). The regression-line-percentile equation␣exhibited a greater length-related bias especially at the ends of the length spectrum, so we recommend the quadratic empirical-percentile equation␣for this species. We also developed standard length categories for assessing fish population size structure. We propose minimum lengths for five standard length categories of 11, 18, 24, 28, and 35 cm TL for stock, quality, preferred, memorable, and trophy sizes, respectively. Development of a W_s equation␣and standard length categories will aid biologists in assessing condition and size structure of wild Lake Chubsucker populations and those being propagated for supplemental stocking into trophy bass ponds for native forage or in areas with depressed native populations. Additionally, by evaluating this nongame species that occupies the same environments as higher profile game fish species, a more holistic approach of evaluating the overall health of systems can be examined.

中文翻译：

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Lake Chubsucker 建议的标准重量公式和标准长度类别

已经为各种鱼类提出了标准重量方程，包括许多非游戏物种。在这里，我们使用传统的回归线百分位数技术和较新的经验百分位数方法为 Lake Chubsucker Erimyzon succetta开发了标准权重 ( W _s ) 方程。在最终分析中使用了 19,727 只 8 至 42 厘米 TL 和 129 个种群的长度和体重数据。这些鱼是从 1977 年到 2020 年由各种机构和大学人员从北美该物种范围内的大多数已知种群中收集的。该物种在中西部和北部的几个州被认为是脆弱的、濒临灭绝的或灭绝的，但它在东南部似乎是安全的。得到的W¯¯_小号对于 RLP 和二次经验百分位数方法技术，方程分别为 log ₁₀ W = -5.0962 + 3.1125 × log ₁₀ L和 log ₁₀ W = –5.9735 + 3.8828 × log ₁₀ L -0.1701 × (log ₁₀ L ) ²，其中W是重量 (g) 和L是总长度（TL，mm）。回归线百分位数方程␣表现出更大的与长度相关的偏差，尤其是在长度谱的末端，因此我们推荐该物种的二次经验百分位数方程␣。我们还开发了用于评估鱼类种群大小结构的标准长度类别。我们为 11、18、24、28 和 35 厘米 TL 的五个标准长度类别分别提出了库存、质量、首选、难忘和奖杯尺寸的最小长度。W_的发展等式␣和标准长度类别将帮助生物学家评估野生湖鲢鱼种群的状况和大小结构，以及那些被繁殖到用于本地饲料的奖杯鲈鱼池塘或本地种群数量减少的地区的种群的状况和大小结构。此外，通过评估与更高级的猎鱼物种占据相同环境的这种非猎物物种，可以检查评估系统整体健康状况的更全面的方法。