Community Structure and Biodiversity Analysis of Fish in Shentou Spring Region

LIANG Wen-ming;ZHANG Da-wei;ZHANG Yuan;CUI Song-lin;Shanxi Scientific Experiment Centre of Aquaculture Breeding;Fisheries Research Institute of Shanxi Province;

LIANG Wen-ming%ZHANG Da-wei%ZHANG Yuan%CUI Song-lin%Shanxi Scientific Experiment Centre of Aquaculture Breeding%Fisheries Research Institute of Shanxi Province

Shentou Spring;;fish resources survey;;fish community structure;;environmental factor;;biodiversity

Field surveys of fish resources were conducted in 4 sampling points by trapping, electric fishing, and anglers in Shentou Spring region in June and August of 2016 in order to understand the current situation of fish communities and to conserve its biodiversity. During the surveys, a total of 4 307 individual fishes, weighing 21.81 kg in all, were sampled, including 16 species belonging to 5 orders, 7 families and 14 genera: 6 species in Cyprinidae, accounting for 37.5% of the total; 4 species in Cobitidae, accounting for25.0% of the total; 2 species in Gobiidae, accounting for 12.5% of the total; 1 species each in Cyprinodontidae, Gasterosteidae, Eleotridae and Salmonidae, altogether accounting for 25.0% of the total. The relative importance index(IRI)analysis showed that Triplophysa dalaica, minnow Phoxinus lagowskii, stone moroko Pseudorasbora parva and crucian carp Carassius auratus were the dominant species. The analysis of richness index(R), evenness index(J')and diversity index(H')revealed that the fish community structure was characterized by the relatively unitary and simple composition of species, weak stability and vulnerable biodiversity in Shentou Spring region, primarily due to the main factors affecting the biodiversity of the local fishes including natural environmental conditions and human activity. The establishment of aquaculture germplasm resources conservation area is suggested to protect and recover the biodiversity of fishes in Shentou Spring region.