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What can commercial fishery data in the Great Lakes reveal about juvenile sea lamprey (Petromyzon marinus) ecology and management?
Journal of Great Lakes Research ( IF 2.2 ) Pub Date : 2021-04-24 , DOI: 10.1016/j.jglr.2021.03.023
John B. Hume , Gale A. Bravener , Shane Flinn , Nicholas S. Johnson

The Laurentian Great Lakes of North America support a large and profitable freshwater fishery, but one continuously beset by parasitism from the invasive sea lamprey (Petromyzon marinus). Despite being the life stage that inflicts damage to the fishery, therefore necessitating a bi-national control program, our knowledge of juvenile sea lamprey ecology is poor and their response to control efforts are not assessed. Incidental capture of juvenile sea lamprey by commercial fishers is one means to collect data on this enigmatic life stage, and in Lake Huron such data have been collated since 1967. Here, we explore incidental captures of juvenile sea lamprey and their hosts from northern Lake Huron between 1987 and 2017 (n = 33,246 observations) to address four objectives. Firstly, we document collection efforts by fishers to provide historical context to the dataset. Secondly, we pose and test a series of questions related to fishery encounter, host selection, growth, distribution, and sex ratio to highlight how these types of data can be informative regarding juvenile sea lamprey ecology. Results presented here could be used to develop biological hypotheses to be addressed in future work. Thirdly, we directly assessed whether juvenile sea lamprey capture data could be useful in corroborating trends observed in adult sea lamprey abundance and wounding, as well as in identifying abundance and wounding hotspots. Lastly, we summarize research and outreach efforts that have benefited from the capture of juvenile sea lamprey in recent years.



中文翻译:

五大湖地区的商业渔业数据可以揭示出关于少年海七rey鱼(Petromyzon marinus)的生态和管理的哪些信息?

北美的洛朗山脉大湖支持大型且有利可图的淡水渔业,但其中之一一直受到入侵海鳗(Petromyzon marinus)的寄生虫的困扰。尽管这是对渔业造成损害的生命阶段,因此有必要制定一项双向控制计划,但我们对少年七lamp鳗生态学的了解很差,并且未评估其对控制措施的反应。商业渔民偶然捕捞七彩海鳗是收集这个神秘生活阶段数据的一种方法,在休伦湖,此类数据自1967年以来就已经整理。在这里,我们探讨了从休伦湖北部偶然捕捞的七彩海鳗及其宿主。 1987年至2017年之间(n = 33,246个观测值)以解决四个目标。首先,我们记录了渔民的收集工作,以便为数据集提供历史背景。其次,我们提出并测试了一系列与渔业遭遇,寄主选择,生长,分布和性别比有关的问题,以突出这些类型的数据如何为有关少年海鳗的生态学提供信息。本文介绍的结果可用于建立生物学假设,以在未来的工作中加以解决。第三,我们直接评估了少年海鳗的捕获数据是否可以用于证实在成人海鳗的丰度和创伤中观察到的趋势,以及在确定丰度和创伤热点方面。最后,我们总结了近年来从捕获少年海鳗中受益的研究和拓展工作。

更新日期:2021-04-24
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