Alò Dominique, Correa Cristian, Samaniego Horacio, Krabbenhoft Corey A, Turner Thomas F
Departamento de Ecología, Pontificia Universidad Católica de Chile, Santiago, Chile.
Laboratorio de Ecoinformática, Instituto de Conservación Biodiversidad y Territorio, Universidad Austral de Chile, Valdivia, Los Ríos, Chile.
PeerJ. 2019 Jan 3;7:e6149. doi: 10.7717/peerj.6149. eCollection 2019.
Coastal habitats in Chile are hypothesized to support a number of diadromous fish species. The objective of this study was to document migratory life histories of native galaxiids and introduced salmonids from a wide latitudinal range in Chilean Patagonia (39-48°S). Otolith microchemistry data were analysed using a recursive partitioning approach to test for diadromy. Based on annular analysis of Sr:Ca ratios, a diadromous life history was suggested for populations of native , , and . Lifetime residency in freshwater was suggested for populations of and . Among introduced salmonids, populations of and exhibited patterns consistent with anadromy, whereas the screened population of appeared restricted to freshwater. exhibited variable patterns suggesting freshwater residency and possibly anadromy in one case. The capacity and geographic scope of hydropower development is increasing and may disrupt migratory routes of diadromous fishes. Identification of diadromous species is a critical first step for preventing their loss due to hydropower development.
据推测，智利的沿海栖息地有多种洄游鱼类。本研究的目的是记录智利巴塔哥尼亚广泛纬度范围内（南纬39 - 48°）本地盖纹鲈科鱼类和引入的鲑科鱼类的洄游生活史。使用递归划分方法分析耳石微化学数据以测试洄游性。基于对锶钙比的年轮分析，表明本地的、和种群具有洄游生活史。和种群被认为终生栖息于淡水。在引入的鲑科鱼类中，和种群表现出与溯河洄游一致的模式，而经筛查的种群似乎局限于淡水。表现出可变模式，表明在一种情况下为淡水栖息且可能存在溯河洄游。水电开发的能力和地理范围正在增加，可能会扰乱洄游鱼类的洄游路线。识别洄游鱼类是防止其因水电开发而消失的关键第一步。
