Canadian freshwater fish and their metazoan parasites (multiple sources)

Data on host use by parasites were obtained from 7 Canadian freshwater systems, either large lakes or rivers, in which most fish species have been surveyed for parasites. Only fish species for which at least 5 individuals have been examined per locality are included, because estimates of parasite infection level were inaccurate for smaller samples. All species of internal and external metazoan parasites were considered, which include the following groups: nematodes, acanthocephalans, cestodes, trematodes, monogeneans, leeches, copepods and branchiurans. When a species of internal worm occurred among sampled fish as both larval and adult forms, the two forms were treated as functionally distinct species; this convention is justified because larval and adult worms often have different modes of transmission, infect different fish species, and different organs within fish. This collection of data sets is part of the NCEAS hosted online Interaction Web Database at http://www.nceas.ucsb.edu/interactionweb/index.html.

本数据集收录了寄生物宿主利用相关数据，数据来源于7处加拿大淡水水域（涵盖大型湖泊与河流），上述水域内多数鱼类物种均已针对寄生物完成调查。仅纳入每个采样点至少检测5尾个体的鱼类物种，因样本量偏小时，寄生物感染水平的估算结果准确性不足。本数据集纳入所有内外后生动物寄生物（metazoan parasites）物种，涵盖以下类群：线虫（nematodes）、棘头虫（acanthocephalans）、绦虫（cestodes）、吸虫（trematodes）、单殖吸虫（monogeneans）、蛭类（leeches）、桡足类（copepods）以及鳃尾类（branchiurans）。当某类内部蠕虫在采样鱼类中同时存在幼虫与成虫形态时，将二者视为功能上独立的物种；该处理方式具备合理性，原因在于幼虫与成虫通常具有不同的传播途径、宿主范围，且寄生于鱼类体内的不同器官。本数据集集合隶属于由国家生态分析与综合中心（National Center for Ecological Analysis and Synthesis, NCEAS）托管的在线相互作用网络数据库，其网址为http://www.nceas.ucsb.edu/interactionweb/index.html。