Historical distribution of Arctic lamprey Lethenteron camtschaticum in Japanese rivers and its change estimated from fishery statistics and fishers’ local ecological knowledge
Historical distribution of Arctic lamprey Lethenteron camtschaticum in Japanese rivers and its change estimated from fishery statistics and fishers’ local ecological knowledge
复制标题
日本河流中北极七鳃鳗的历史分布及其根据渔业统计和渔民当地生态知识估算的变化
DOI：
10.1007/s12562-021-01518-5
复制
发表时间：
2021
影响因子：
1.9
通讯作者：
Yanai Seiji
中科院分区：
文献类型：
--
作者：
Arakawa Hiroaki;Kishi Daisuke;Yanai Seiji
这项研究确定了日本过去和现在捕获北极七鳃鳗的河流的位置和地理特征，并评估了内陆渔民掌握的当地生态知识(LEK)在估计物种分布方面的有效性。我们从20世纪30年代公布的渔业统计数据和直接从内陆渔业合作社(FCS)收集有关北极七鳃鳗渔业收获的信息。在这两种资源之间，历史收成的存在及其南部的界限基本上是一致的。渔获量历史上沿日本海分布在下游坡度较低的较大河流中，南界估计在北纬36.45-37.33°范围内。活跃的渔场数量从历史上的59个减少到目前的14个。南界进一步向北移动至北纬43.13°。渔业局的LEK提供了足够的信息来估计当地河流的空间分布，并显示河流上游的渔业活动有所减少。我们的数据可以作为恢复北极七鳃鳗的基线，并开发一种监测工具，以改善内陆生物多样性的保护。
This study identified the location and geographical characteristics of rivers where Arctic lampreyLethenteron camtschaticumwere captured in the past and present in Japan and evaluated the effectiveness of the local ecological knowledge (LEK) held by inland fishers for estimating species distribution. We collected information about fishery harvests for Arctic lamprey from fishery statistics published in the 1930s and directly from inland fishery cooperatives (FCs). The presence of a historical harvest and its southern limit were largely consistent between the two resources. The fishery harvest was historically distributed in relatively large rivers, with a low downstream gradient, along the Sea of Japan, and the southern limit was estimated to be in the range of 36.45–37.33° N. The number of active FCs decreased from a historical value of 59 to only 14 at present. The southern limit shifted further north to 43.13° N. The LEK from FCs provided sufficient information to estimate the spatial distribution within the local rivers and revealed that a decline in fishery activity had occurred in the upper reaches of rivers. Our data can be used as a baseline for the restoration of Arctic lamprey and to develop a monitoring tool to improve the conservation of inland biodiversity.