Insights into Daily Dynamics of Fish Migration during Spring in the Konda River
Hydrology and temperature are known as key drivers for fish migration in floodplain-channel systems of large rivers. The Lower Irtysh contains valuable species of whitefish and sturgeon. Thus, along the Konda River, a complex study was carried out in order to investigate fish migration in spring, wi...
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| Format: | Article |
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MDPI AG
2023-12-01
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| Series: | Diversity |
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| Online Access: | https://www.mdpi.com/1424-2818/15/12/1211 |
| _version_ | 1797381370030325760 |
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| author | Andrey A. Chemagin Martin Schletterer |
| author_facet | Andrey A. Chemagin Martin Schletterer |
| author_sort | Andrey A. Chemagin |
| collection | DOAJ |
| description | Hydrology and temperature are known as key drivers for fish migration in floodplain-channel systems of large rivers. The Lower Irtysh contains valuable species of whitefish and sturgeon. Thus, along the Konda River, a complex study was carried out in order to investigate fish migration in spring, with a focus on daily and monthly dynamics. To estimate the number of fish passing up- and downstream, a hydroacoustic system with a scanning beam frequency of 455 kHz was deployed in May 2017. The survey revealed the presence of three peaks in migration activity, as well as differences between a location close to the shore and another in the main channel. Regression analysis revealed a high degree of reliability of the influence of water temperature on the number of migrating fish (<i>p</i> < 0.001). The dataset also showed a daily rhythm of fish migration. An analysis of the daily variation in the illumination index and the intensity of fish migration revealed the presence of noticeable and high correlations for upstream (RS = 0.55; <i>p</i> < 0.05) and downstream migration (RS = 0.71; <i>p</i> < 0.001), respectively. Our data underline the importance of temperature as a trigger for fish migration and reveal diurnal patterns related to illumination. |
| first_indexed | 2024-03-08T20:50:28Z |
| format | Article |
| id | doaj.art-214fd3bd2c864048aab4a7faba25d825 |
| institution | Directory Open Access Journal |
| issn | 1424-2818 |
| language | English |
| last_indexed | 2024-03-08T20:50:28Z |
| publishDate | 2023-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Diversity |
| spelling | doaj.art-214fd3bd2c864048aab4a7faba25d8252023-12-22T14:03:51ZengMDPI AGDiversity1424-28182023-12-011512121110.3390/d15121211Insights into Daily Dynamics of Fish Migration during Spring in the Konda RiverAndrey A. Chemagin0Martin Schletterer1Tobolsk Complex Scientific Station of Ural Branch of the Russian Academy of Sciences (UrB RAS), Akademika Yuriya Osipova Street. 15, 626150 Tobolsk, RussiaInstitute of Hydrobiology and Aquatic Ecosystem Management, University of Natural Resources and Life Sciences, Vienna (BOKU), Gregor-Mendel-Straße 33, 1180 Vienna, AustriaHydrology and temperature are known as key drivers for fish migration in floodplain-channel systems of large rivers. The Lower Irtysh contains valuable species of whitefish and sturgeon. Thus, along the Konda River, a complex study was carried out in order to investigate fish migration in spring, with a focus on daily and monthly dynamics. To estimate the number of fish passing up- and downstream, a hydroacoustic system with a scanning beam frequency of 455 kHz was deployed in May 2017. The survey revealed the presence of three peaks in migration activity, as well as differences between a location close to the shore and another in the main channel. Regression analysis revealed a high degree of reliability of the influence of water temperature on the number of migrating fish (<i>p</i> < 0.001). The dataset also showed a daily rhythm of fish migration. An analysis of the daily variation in the illumination index and the intensity of fish migration revealed the presence of noticeable and high correlations for upstream (RS = 0.55; <i>p</i> < 0.05) and downstream migration (RS = 0.71; <i>p</i> < 0.001), respectively. Our data underline the importance of temperature as a trigger for fish migration and reveal diurnal patterns related to illumination.https://www.mdpi.com/1424-2818/15/12/1211fish migrationhydroacoustic surveywater temperatureilluminationfloodplain |
| spellingShingle | Andrey A. Chemagin Martin Schletterer Insights into Daily Dynamics of Fish Migration during Spring in the Konda River Diversity fish migration hydroacoustic survey water temperature illumination floodplain |
| title | Insights into Daily Dynamics of Fish Migration during Spring in the Konda River |
| title_full | Insights into Daily Dynamics of Fish Migration during Spring in the Konda River |
| title_fullStr | Insights into Daily Dynamics of Fish Migration during Spring in the Konda River |
| title_full_unstemmed | Insights into Daily Dynamics of Fish Migration during Spring in the Konda River |
| title_short | Insights into Daily Dynamics of Fish Migration during Spring in the Konda River |
| title_sort | insights into daily dynamics of fish migration during spring in the konda river |
| topic | fish migration hydroacoustic survey water temperature illumination floodplain |
| url | https://www.mdpi.com/1424-2818/15/12/1211 |
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