Abstract:

According to reproductive habits and adaptation in the early development stage,the fishes in the Yangtze River,including 8 orders 17 families 90 species,were divided into 13 reproductive guilds,about 393% kinds of the total species in the river.869% species of the Cypriniformes belong to nonguarded type.Most of them are pelagophils,lithophils and phytophils,adapting to dwell between lakes and rivers respectively.Compared with current classification system,species of Acheilognathinae limited to only one reproductive guild,while the species of Gobioninae scatter into five guilds.The different components of reproductive guilds in different fauna are compared.Furthermore,the ecological adaptation of different reproductive guilds and the application on protection of fish resources in the Yangtze River were discussed