Ascent Behaviors of Nine-spined Sticklebacks in Orifices and on Overflow Weirs of Fishways
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- Yamashita Kei
- Hiro Photo Co., Ltd.
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- Nakano Mitsunori
- Faculty of Bioresources and Environmental Sciences, Ishikawa Prefectural University
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- Chono Shunsuke
- Faculty of Bioresources and Environmental Sciences, Ishikawa Prefectural University
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- Fujihara Yoichi
- Faculty of Bioresources and Environmental Sciences, Ishikawa Prefectural University
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- Ichion Eiji
- Faculty of Bioresources and Environmental Sciences, Ishikawa Prefectural University
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Abstract
<p> Experiments on the ascent behaviors of nine-spined sticklebacks (Pungitius sp. 1) were conducted in a submerged orifice weir and on an overflow weir in an experimental flume. The ascent behaviors of the fish were identified using a high-speed camera to measure the ground speeds and ascent routes of sticklebacks. The flow velocities in and around the orifice and on and around the overflow weir were measured using a three-dimensional velocity meter and particle tracking velocimetry. Stickleback swimming speed in the ascent route was calculated based on ground speeds and flow velocities. In the experiments with the orifice weir, most sticklebacks passed the middle area of the orifice, where flow velocity was relatively slow. Conversely, in the experiments with the overflow weir, most sticklebacks passed over the weir, where flow velocity was relatively fast. In the experiments with the orifice and with the overflow weir, the swimming speeds of sticklebacks were 8–39 and 9–21 times their body lengths, respectively. The results indicate that many sticklebacks ascend in areas where flow velocities were faster than their burst speed, which is defined as 10 times their body lengths.</p>
Journal
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- Journal of Rainwater Catchment Systems
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Journal of Rainwater Catchment Systems 25 (2), 1-7, 2020
Japan Rainwater Catchment Systems Association
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Details 詳細情報について
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- CRID
- 1390571240018047360
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- NII Article ID
- 130008105719
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- NII Book ID
- AA11657953
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- ISSN
- 21866228
- 13438646
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- NDL BIB ID
- 030300963
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed