Recruitment sources and spatial patterns of population demographics of spotted bass in a large river-tributary network
Recruitment sources and spatial patterns of population demographics of spotted bass in a large river-tributary network
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DOI：
10.1111/fme.12296
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发表时间：
2018-10-01
影响因子：
2
通讯作者：
Whitledge, Gregory W.
中科院分区：
文献类型：
--
作者：
Abell, Nicholas J.;Oliver, Devon C.;Whitledge, Gregory W.
了解种群特征的空间格局和支持河流鱼类种群的主要纳塔尔环境对渔业管理非常重要。鳍射线微量化学被用来确定纳塔尔环境，年龄估计从部分鳍射线被用来估计增长和死亡率的斑点鲈鱼，Micropterus punctulatus（Rafinesque），在一段的俄亥俄州河（史密斯兰池）和三条支流。俄亥俄州河及其支流间水体Sr：Ca和Ba：Ca的差异反映在鳍线边缘Sr：Ca和Ba：Ca上。在俄亥俄州河中捕获的2岁斑点鲈鱼中有14%来自支流，而在支流中捕获的10%来自俄亥俄州河。斑点鲈鱼在俄亥俄州河达到更大的最大尺寸（L=448.7）比同种在支流（L=324.4），虽然死亡率没有什么不同。虽然86%的斑点鲈鱼收集在其推断的纳塔尔环境，小支流可能是一个补充来源的招聘的斑点鲈鱼股票在史密斯兰池。
Understanding spatial patterns in population characteristics and the principal natal environments supporting riverine fish populations are important for fisheries management. Fin ray microchemistry was used to identify natal environment, and age estimates from sectioned fin rays were used to estimate growth and mortality rates for spotted bass, Micropterus punctulatus (Rafinesque), in a segment of the Ohio River (Smithland Pool) and three tributaries. Differences in water Sr:Ca and Ba:Ca among the Ohio River and tributaries were reflected in fin ray edge Sr:Ca and Ba:Ca. Fourteen percent of spotted bass age 2 captured in the Ohio River originated in tributaries, whereas 10% captured in tributaries originated in the Ohio River. Spotted bass in the Ohio River reached larger maximum size (L=448.7) than conspecifics in tributaries (L=324.4), although mortality rates were not different. Although 86% of spotted bass were collected in their inferred natal environment, small tributaries may be a supplemental source of recruitment for the spotted bass stock in Smithland Pool.