Swimming ability of Schizothoracinae fishes in Yarlung Zangbo River of China

作者：Hongtao Wang, Xutao Jiang, Kejia Liu, Xunchi Pu, Yuanming Wang · 发表于：Journal of Fish Biology · 年份：2024 · DOI：10.1111/jfb.15763 · 被引用次数：9 · 研究领域：Fish Ecology and Management Studies、Fish biology, ecology, and behavior、Physiological and biochemical adaptations

Abstract The Yarlung Zangbo River is a river with abundant hydropower resources but fragile biodiversity in China. As an important benchmark for both research and ecological management, there is still a lack of knowledge about the swimming ability of fishes in the Yarlung Zangbo River. The induced flow velocity ( U ind ), critical swimming speed ( U crit ), and burst swimming speed ( U burst ) of five Schizothoracinae species were tested in this study. Relative swimming ability related to body length and body shape was calculated. The results indicated that the average absolute swimming speeds ( U ind‐a , U crit‐a , and U burst‐a ) of all the experimental fish were 10.20 ± 0.01, 57.58 ± 3.28, and 69.54 ± 2.94 cm/s, respectively, and the corresponding relative U ind , U crit , and U burst related to body length ( U ind‐l , U crit‐l , U burst‐l ) were 1.15 ± 0.07, 5.04 ± 0.26, and 7.23 ± 0.28 BL/s, respectively. Moreover, relative U ind , U crit , and U burst related to body shape ( U ind‐s , U crit‐s , and U burst‐s ) were 0.80 ± 0.13, 2.49 ± 0.51, and 4.32 ± 0.57 cm −2 /s, respectively. No significantly differences in relative swimming speeds existed among five species. Only Oxygymnocypris stewartii was significantly weaker in U burst‐s than Schizothorax o'connori . The body shape showed a stronger relationship with swimming speed than the body length did. Schizothoracinae fish in the Yarlung Zangbo River basin are less sensitive to the water flow and performed weaker U crit ...