草鱼(Ctenopharyngodon idella)的运动状态和回水利用可以为清除工作提供信息

IF 2.5 3区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES
Sophia M. Bonjour , Robert D. Hunter , James J. Roberts , Travis O. Brenden , Scott F. Colborne , Matthew D. Faust , Christine M. Mayer , Robert Mapes , Richard T. Kraus , Robin D. Calfee , Matthew R. Acre
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引用次数: 0

摘要

草鱼(Ctenopharyngodon idella)在劳伦森五大湖的扩张带来了重大的生态和经济风险。为了抑制草鱼的数量增长,已经加大了对草鱼的抑制力度,但捕获效率仍然很低。管理上的一个挑战是缺乏对这种入侵物种如何利用其在五大湖的新栖息地的了解。本研究旨在确定草鱼行为和回水利用的时空模式,这些模式可以通过管理努力(包括清除)加以利用。在美国俄亥俄州的桑达斯基河,我们使用声波遥测技术来检测草鱼何时出现在易被船电捕鱼清除的区域。使用隐马尔可夫模型对行为状态进行分类,并评估其与环境因素的关系。表现最好的2状态和3状态隐马尔可夫模型包括接近回水作为状态依赖的步长和状态之间的过渡概率的一个因素,在中午和在回水中处于流动性较差状态的概率较高。对于双状态模型,这种流动性较差的状态在较暖的温度下也更为常见。本研究确定的独特的水模式和回水利用为改善管理提供了重要的见解。模型结果表明,目前的清除工作主要集中在河流的主干上,可能会从调整时间和清除装置中受益。这些发现提出了进一步的问题,即未观察到的行为有助于状态分配和足够灵活的适应性管理策略,以解释草鱼行为的个体差异。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Grass carp (Ctenopharyngodon idella) movement states and backwater use can inform removal efforts
Expansion of grass carp (Ctenopharyngodon idella) within the Laurentian Great Lakes poses significant ecological and economic risks. Suppression efforts to remove grass carp have increased to curtail population growth, but capture efficiency remains low. One management challenge is the lack of understanding how this invasive species is using its novel habitats in the Great Lakes. This study aimed to identify spatiotemporal patterns in grass carp behavior and backwater use that could be exploited by management efforts, including removal. We used acoustic telemetry to examine when grass carp occurred in areas vulnerable to removal by boat electrofishing in the Sandusky River, Ohio, USA. Hidden Markov models were used to categorize behavioral states and evaluate their relationships with environmental factors. Best performing 2-state and 3-state hidden Markov models included proximity to backwater as a factor in state-dependent step length and transition probability between states, with a higher probability of being in less mobile states during the middle of the day and in backwaters. For the 2-state model, this less mobile state was also more common during warmer temperatures. Distinct diel patterns and backwater use identified in this study provide critical insights for improving management. Model results suggest that current removal efforts, focused primarily on the mainstem of the river, may benefit from adjustments in both timing and removal gear. The findings raise further questions about unobserved behaviors contributing to state assignment and sufficiently flexible adaptive management strategies to account for individual variation in grass carp behavior.
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来源期刊
Journal of Great Lakes Research
Journal of Great Lakes Research 生物-海洋与淡水生物学
CiteScore
5.10
自引率
13.60%
发文量
178
审稿时长
6 months
期刊介绍: Published six times per year, the Journal of Great Lakes Research is multidisciplinary in its coverage, publishing manuscripts on a wide range of theoretical and applied topics in the natural science fields of biology, chemistry, physics, geology, as well as social sciences of the large lakes of the world and their watersheds. Large lakes generally are considered as those lakes which have a mean surface area of >500 km2 (see Herdendorf, C.E. 1982. Large lakes of the world. J. Great Lakes Res. 8:379-412, for examples), although smaller lakes may be considered, especially if they are very deep. We also welcome contributions on saline lakes and research on estuarine waters where the results have application to large lakes.
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