Analysis of species and taxonomic diversities of fish inhabiting Dongping Lake,downstream of Yellow River
In order to describe the species composition and taxonomic diversity of fish inhabiting Dong-ping Lake,downstream of Yellow River,the species composition was analyzed and the taxonomic di-versity and G-F diversity indexes were calculated based on the survey data of fish resources from 1979 to 1980 and the survey data of fish from 2020 to 2021.In total,55 species belonging to 39 genera,15 families and 8 orders of fish were recorded from 1979 to 1980,and 41 species belonging to 39 genera,15 families and 7 orders of fish were recorded from 2020 to 2021,among them fish species in Cyprini-formes were absolutely dominant.From 1979 to 1980 and from 2020 to 2021,the average taxonomic difference index(Δ+)of fish inhabiting Dongping Lake was 77.19 and 79.39,the taxonomic difference variation index(Λ+)was 581.9 and 561.5,the family diversity index(F index)was 5.05 and 4.15,the genus diversity index(G index)was 3.70 and 3.65,and the standardized G-F index was 0.27 and 0.12 respectively.Fish diversity of Dongping Lake displayed an overall downward trend.Fish germ-plasm resources protection and habitat restoration of Dongping Lake should be strengthened.
NETL
NSTL
万方数据
