Spatial distribution and abundance of small fishes in Xiaosihai Lake, a shallow lake along the Changjiang (Yangtze) River, China |
| |
| Authors: | Wei Li Tanglin Zhang Zhongjie Li |
| |
| Institution: | (1) The State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, The Chinese Academy of Sciences, Wuhan, 430072, China;(2) Graduate School of the Chinese Academy of Sciences, Beijing, 100039, China; |
| |
| Abstract: | Spatial distribution and abundance of small fishes were studied in autumn 2007 in the Xiaosihai Lake, a shallow lake along
the middle reach of the Changjiang (Yangtze) River. Based on the plant cover, the lake was divided into three major habitats:
Myriophyllum spicatum habitat (MS habitat), Trapa bispinosa habitat (TB habitat), and non-vegetation habitat (NV habitat). A modified pop-net was used for quantitative sampling of small
fishes in the three habitats, and the Zippin’s removal method was used for estimating densities of the small fishes. A total
of 13 species belonging to 5 families were collected, with 11 species in MS habitat, 7 species in TB habitat, and 5 species
in NV habitat. Habitat type had significant effect on the spatial distribution of small fishes. The Shannon-Wiener diversity
index in the MS, TB and NV habitats were 1.28, 0.56 and 0.54, respectively. The total density and biomass of small fishes
were significantly higher in the MS habitat (13.68 ind/m2 and 4.44 g/m2) than in the TB habitat (1.41 ind/m2 and 0.54 g/m2) and the NV habitat (1.08 ind/m2 and 0.40 g/m2), and were not significantly different between the TB habitat and the NV habitat. Water depth had no significant effect on
spatial distribution of the small fishes. It was suggested that vegetation type played an important role in habitat selectivity
of small fishes, and the presence of submersed vegetation should be of significance in the conservation of small fish diversity. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
