Data from: Metabolic traits of westslope cutthroat, introduced rainbow trout and their hybrids in an ecotonal hybrid zone along an elevation gradient

AbstractIn the Upper Oldman River, Alberta, introduced non-native hatchery rainbow trout hybridize with native westslope cutthroat trout, resulting in a hybrid swarm. Rainbow trout dominate at low elevations (<1250 m) in the river mainstem, cutthroat in high elevation tributaries (>1400 m), and hybrids are numerically dominant in the mid-elevation range. We hypothesized that metabolism of rainbow trout would exceed that of cutthroat trout, and that the elevation gradient in genetic makeup would be mirrored by a gradient in metabolic traits, with intermediate traits in the hybrid dominated ecotone. Metabolic traits were measured and regressed against the genetic makeup of individuals and elevation. Rainbow trout had higher oxygen consumption rates (OCR), higher white muscle lactate dehydrogenase (LDH) and citrate synthase (CS) activity, and higher plasma acetylcholinesterase (AchE) than cutthroat trout. Hybrids had intermediate OCR and AchE, but LDH activity as high as rainbow trout. While hybrid zones are usually modeled as a balance between cross species mating and selection against hybrids, ecotonal hybrid zones, where hybrids proliferate in intermediate habitats and have traits that appear well suited to ecotonal conditions, have been proposed for some plants and animals, and may have important implications for resource management and conservation.
Usage notesRasmussen et al data fileThe data set contains a number of measurements of metabolic traits measured on field caught fish (oxygen consumption rate, white muscle LDH and CS, and plasma acetylcholinesterase, together with the genotypes (pure rainbow trout, pure cutthroat trout or hybrid) body size data and the elevation of the site at which each was captured. These were the data used to generate the models presented in the paper.Rasmussen et al data file.xls

【摘要】在加拿大阿尔伯塔省老曼河上游，引入的非原生孵化场虹鳟（rainbow trout）与本土西部切喉鳟（westslope cutthroat trout）发生杂交，形成杂交群（hybrid swarm）。干流低海拔区域（<1250米）以虹鳟占绝对优势，高海拔支流（>1400米）则以西部切喉鳟为主，而中海拔区间的种群数量优势者为杂交个体。本研究假设虹鳟的代谢水平高于西部切喉鳟，且遗传组成的海拔梯度会对应代谢性状的海拔梯度，即杂交个体占优的生态交错带（ecotone）中存在中间型代谢性状。研究人员对代谢性状进行了测定，并将其与个体的遗传组成及采样海拔进行回归分析。结果显示，虹鳟的氧消耗率（oxygen consumption rate, OCR）、白肌乳酸脱氢酶（lactate dehydrogenase, LDH）活性、柠檬酸合酶（citrate synthase, CS）活性以及血浆乙酰胆碱酯酶（acetylcholinesterase, AchE）水平均高于西部切喉鳟。杂交个体的OCR和AchE水平处于中间状态，但其LDH活性与虹鳟相当。尽管杂交带（hybrid zone）通常被建模为物种间杂交与对杂交个体的选择之间的平衡，但已有研究针对部分动、植物提出了生态交错带型杂交带的概念——此类杂交带中杂交个体在中间生境中大量繁衍，且其性状恰好适配交错带的环境条件，该类型杂交带可能对资源管理与保护工作具有重要意义。

【使用说明】拉斯穆森等（Rasmussen et al）数据集文件
本数据集包含对野外捕获鱼类的多项代谢性状测定数据：包括氧消耗率、白肌LDH与CS活性、血浆乙酰胆碱酯酶水平，同时附带个体的基因型信息（纯合虹鳟、纯合西部切喉鳟或杂交个体）、体型数据以及个体采样点的海拔信息。本数据集即为生成论文中所呈现模型的原始数据。
数据集文件：Rasmussen et al data file.xls