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Movement, home range, and depredation of invasive lionfish revealed by fine-scale acoustic telemetry in the northern Gulf of Mexico
Marine Biology ( IF 2.1 ) Pub Date : 2020-07-04 , DOI: 10.1007/s00227-020-03728-4
Kristen A. Dahl , William F. Patterson

Fine-scale movement dynamics of adult invasive lionfish may inform the spatial scale of negative impacts to local food webs, the design and efficacy of ongoing removal efforts, and the speed at which lionfish may spread into new habitats, but have not previously been characterized. An acoustic Vemco positioning system (VPS) was used to track fine-scale (<10 m) movements of adult lionfish (288–395 mm total length; n = 20) tagged in situ at artificial reefs off Destin, Florida (USA). We estimated the spatial scale of movement, activity patterns, and individual home ranges, as well as whether these variables were affected by lionfish size or density. Lionfish were tracked up to 89 days and had 95% kernel utilization distribution (KUD) home ranges between 158 and 4051 m 2 . Daily distances moved (range 93–807 m) exceeded previous estimates, and 40% of tagged lionfish were tracked moving to reefs up to 2 km from initial tagging locations. Movement pattern and velocity data revealed two (10%) tagged lionfish were consumed by fast-moving predators, while another two emigrated outside the array. Acoustic detection of the remaining tagged fish ended prematurely following two hurricanes that passed over the array, which may implicate the storms in displacing tagged fish, causing tag loss, or contributing to lionfish mortality. Overall, results suggest invasive lionfish have larger home ranges and display greater movement than reported previously which has important implications for artificial reef management in Florida, and elsewhere, in response to the lionfish invasion.

中文翻译:

墨西哥湾北部精细声学遥测显示入侵狮子鱼的运动、栖息地和掠夺

成年入侵狮子鱼的精细运动动态可能会告知对当地食物网的负面影响的空间尺度、正在进行的清除工作的设计和效果,以及狮子鱼可能扩散到新栖息地的速度,但以前没有被描述过。声学 Vemco 定位系统 (VPS) 用于跟踪在佛罗里达州德斯廷 (Destin) 附近人工鱼礁原位标记的成年狮子鱼(总长度为 288-395 毫米;n = 20)的精细(<10 m)运动。我们估计了运动的空间尺度、活动模式和个体家庭范围,以及这些变量是否受狮子鱼大小或密度的影响。狮子鱼的追踪时间长达 89 天,并且在 158 到 4051 m 2 之间具有 95% 的内核利用率分布 (KUD) 家庭范围。每天移动的距离(范围 93-807 m)超过了之前的估计,40% 的标记狮子鱼被追踪到从初始标记位置移动到 2 公里的珊瑚礁。运动模式和速度数据显示,两条 (10%) 标记的狮子鱼被快速移动的捕食者吃掉,而另外两条则迁移到阵列外。在两次飓风掠过阵列后,对剩余标记鱼的声学检测过早结束,这可能意味着风暴取代了标记鱼,导致标记丢失或导致狮子鱼死亡。总体而言,结果表明,入侵狮子鱼的栖息地范围更大,活动范围也比之前报道的要大,这对佛罗里达州和其他地方的人工鱼礁管理具有重要意义,以应对狮子鱼的入侵。运动模式和速度数据显示,两条 (10%) 标记的狮子鱼被快速移动的捕食者吃掉,而另外两条则迁移到阵列外。在两次飓风掠过阵列后,对剩余标记鱼的声学检测过早结束,这可能意味着风暴取代了标记鱼,导致标记丢失或导致狮子鱼死亡。总体而言,结果表明,入侵狮子鱼的栖息地范围更大,活动范围也比之前报道的要大,这对佛罗里达州和其他地方的人工鱼礁管理具有重要意义,以应对狮子鱼的入侵。运动模式和速度数据显示,两条 (10%) 标记的狮子鱼被快速移动的捕食者吃掉,而另外两条则迁移到阵列外。在两次飓风掠过阵列后,对剩余标记鱼的声学检测过早结束,这可能意味着风暴取代了标记鱼,导致标记丢失或导致狮子鱼死亡。总体而言,结果表明,入侵狮子鱼的栖息地范围更大,活动范围也比之前报道的要大,这对佛罗里达州和其他地方的人工鱼礁管理具有重要意义,以应对狮子鱼的入侵。在两次飓风掠过阵列后,对剩余标记鱼的声学检测过早结束,这可能意味着风暴取代了标记鱼,导致标记丢失或导致狮子鱼死亡。总体而言,结果表明,入侵狮子鱼的栖息地范围更大,活动范围也比之前报道的要大,这对佛罗里达州和其他地方的人工鱼礁管理具有重要意义,以应对狮子鱼的入侵。在两次飓风掠过阵列后,对剩余标记鱼的声学检测过早结束,这可能意味着风暴取代了标记鱼,导致标记丢失或导致狮子鱼死亡。总体而言,结果表明,入侵狮子鱼的栖息地范围更大,活动范围也比之前报道的要大,这对佛罗里达州和其他地方的人工鱼礁管理具有重要意义,以应对狮子鱼的入侵。
更新日期:2020-07-04
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