Large- and small-scale movement and distribution of acoustically tagged lake sturgeon (Acipenser fulvescens) in eastern Lake Erie

IF 2.4 3区 环境科学与生态学 Q2 BIODIVERSITY CONSERVATION
Jonah L. Withers, Helen Takade-Heumacher, Lori A. Davis, Rachel D. Neuenhoff, S. Albeke, J. Sweka
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引用次数: 1

Abstract

Background Defining the spatial distribution, home range, and movement patterns of lake sturgeon ( Acipenser fulvescens ) is important to managers and decision-makers given the large migration potential and potamodromous behavior exhibited by the species. A remnant population of lake sturgeon remains in the far eastern basin of Lake Erie and although recent efforts have estimated the population size, described the age distribution, and identified a primary spawning site no study to date has examined the spatial distribution or movements of individuals within this population. Between 2014 and 2018, we acoustically tagged 59 adult lake sturgeon, captured in the Buffalo Harbor area, and monitored their large-scale movements throughout Lake Erie with the Great Lakes Acoustic Telemetry System and small-scale movements with a Vemco Positioning System in the Buffalo Harbor area. After dividing Lake Erie into seven sections, we ran a multi-state mark–recapture model to examine the movement rates into and out of the eastern most section of the lake. Within a heavily utilized lake section, in the Buffalo Harbor area, we identified home ranges with our Vemco Positioning System for each season and year using averaged Brownian bridge movement models. Results Although some sturgeon demonstrated large-scale movements, traversing the entirety of Lake Erie, the majority of individuals spent their time in the eastern basin of the lake. Home ranges appeared to vary among seasons, but were consistent across years with lake sturgeon selecting the northeastern, rocky, and shallow area of our array during pre-spawning and spawning seasons and leaving our array, or selecting a trough running along the northwestern portion of our array comprising sand and bedrock, in the summer and fall seasons. Conclusions Documenting these large-scale movements aligns with previous findings that lake sturgeon on either end of the lake are genetically similar and demonstrates lake sturgeon in the eastern basin exhibit strong philopatry. Our small-scale movement models provide managers with spatial reference points, in the form of utilization distributions, indicating heavily used areas by lake sturgeon within seasons. Future studies should examine what parameters are driving site selection in these areas.
伊利湖东部声学标记湖鲟(Acipenser fulvescens)的大规模和小规模运动和分布
背景鉴于湖鲟具有巨大的迁徙潜力和嗜钾行为,确定湖鲟的空间分布、生活范围和运动模式对管理者和决策者来说很重要。伊利湖东部盆地仍有湖鲟的残余种群,尽管最近的工作已经估计了种群规模,描述了年龄分布,并确定了主要产卵点,但迄今为止,没有任何研究对该种群中个体的空间分布或运动进行研究。2014年至2018年间,我们对在布法罗港地区捕获的59只成年湖鲟进行了声学标记,并使用五大湖声学遥测系统监测了它们在整个伊利湖的大规模活动,并使用维姆科定位系统监测了布法罗港区域的小规模活动。在将伊利湖划分为七个部分后,我们运行了一个多州标记-再捕获模型,以检查进出该湖最东部部分的移动速率。在布法罗港(Buffalo Harbor)地区一个利用率很高的湖泊区域,我们使用平均布朗桥运动模型,用Vemco定位系统确定了每个季节和年份的归属范围。结果尽管一些鲟鱼表现出大规模的活动,穿越了整个伊利湖,但大多数个体都在湖的东部流域度过。家域似乎因季节而异,但多年来都是一致的,因为湖鲟在产卵前和产卵季节选择了我们阵列的东北部、岩石和浅水区,然后在夏季和秋季离开我们的阵列,或者选择了一个沿我们阵列的西北部延伸的由沙子和基岩组成的槽。结论记录这些大规模运动与之前的研究结果一致,即湖两端的湖鲟在基因上相似,并表明东部盆地的湖鲟表现出强烈的文献特征。我们的小规模运动模型以利用分布的形式为管理者提供了空间参考点,表明湖泊鲟鱼在季节内大量使用的区域。未来的研究应该检查在这些地区是什么参数在推动选址。
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来源期刊
Animal Biotelemetry
Animal Biotelemetry Agricultural and Biological Sciences-Animal Science and Zoology
CiteScore
4.20
自引率
11.10%
发文量
33
审稿时长
10 weeks
期刊介绍: Animal Biotelemetry is an open access peer-reviewed journal that publishes the results of studies utilizing telemetric techniques (including biologgers) to understand physiological, behavioural, and ecological mechanisms in a broad range of environments (e.g. terrestrial, freshwater and marine) and taxa. The journal also welcomes descriptions and validations of newly developed tagging techniques and tracking technologies, as well as methods for analyzing telemetric data.
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