红水河干流鱼类组成和分类多样性研究

Based on the fish lists compiled from the investigations of the fish composition in the main stream of the Hongshui River in 2009 and 2018, the fish taxonomic diversity index and G - F diversity index were calculated. In 2009, 86 fish species were collected, belonging to 6 orders, 17 families and 62 genera. In 2018, there were 62 fish species in total, belonging to 6 orders, 14 families and 49 genera. The average taxonomic distinctness index (Δ + ) of the fish in the main stream of the Hongshui River in 2009 and 2018 was 63.8 and 62.9 respectively; the family diversity index (F index) was 7.69, the genus diversity index (G index) was 4.07, and the family - genus diversity index (G - F index) was 0.47. In 2018, the family diversity index (F index) of the fish in the main stream of the Hongshui River was 6.21, the genus diversity index (G index) was 3.70, and the family - genus diversity index (G - F index) was 0.40. Compared with 2009, the G - F diversity index of the fish in the main stream of the Hongshui River in 2018 showed a downward trend.

以 2009 年和 2018 年红水河干流调查的鱼类组成编制的鱼类名录为依据，计算鱼类分类多样性指数和.G-F 多样性指数。2009 年采集到 86 种鱼类，隶属于 6 目 17 科 62 属。2018 年共有鱼类 62 种，隶属于 6 目 14 科.49 属。2009 年和 2018 年红水河干流鱼类平均分类差异指数（Δ + ）分别为 63.8 和 62.9；科多样性指数（F 指数）为.7.69，属多样性指数（G 指数）为 4.07，科属多样性指数（G-F 指数）为 0.47。2018 年红水河干流鱼类科多样性指.数（F 指数）为 6.21，属多样性指数（G 指数）为 3.70，科属多样性指数（G-F 指数）为 0.40。与 2009 年相比，2018.年红水河干流鱼类 G-F 多样性指数呈下降趋势。