The seasonal rate of discharge change as the main trigger synchronizing freshwater fish reproduction in an Amazonian River

This dataset was used in Röpke et al. (2024) in the study 'The seasonal rate of discharge change as the primary trigger synchronizing freshwater fish reproduction in an Amazonian River', published at Reviews in Fisheries and Fish Biology to investigate: 1 Two questions were addressed: 1) Which variables are the proximal cues explaining the final gonadal preparation of fish? 2) In riverine environments, do migratory and non-migratory fish species respond to similar variables? We present two datasets here are: 1- the index of reproduction for the fish assemblage (CRI) and the respective environmental data (CRI and environmental variables.csv) used to perform statistic tests; 2 - data of proportion of individuals ready to reproduce (mature gonads/initiating spawning) by species and sampling events (species reproduction by sampling event.csv) this data were used to the calculus of CRI. A description of each column is presented in each csv file. Sampling methods and CRI calculus can be found in Röpke et al. (2024).

本数据集应用于Röpke等人2024年发表于《鱼类与渔业生物学综述（Reviews in Fisheries and Fish Biology）》的研究《亚马逊河流域淡水鱼类繁殖同步的核心触发因子：径流变化的季节速率》（原英文标题：The seasonal rate of discharge change as the primary trigger synchronizing freshwater fish reproduction in an Amazonian River），该研究旨在解答两个核心问题：1. 哪些变量可作为解释鱼类最终性腺发育准备的近端触发因子？2. 在河流生境中，洄游性与非洄游性鱼类是否会对相似的环境变量产生响应？本次公开的数据集包含两类：1. 用于开展统计检验的鱼类集合繁殖指数（Composite Reproductive Index，CRI）及对应环境数据，对应文件为"CRI and environmental variables.csv"；2. 按物种与采样事件划分的、处于繁殖准备状态（性腺成熟/启动产卵）的个体占比数据，对应文件为"species reproduction by sampling event.csv"，该数据用于CRI的计算。各列的详细说明可参见对应CSV文件。采样方法及CRI的计算过程可参阅Röpke等人2024年的研究。