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Flow field-induced drag forces and swimming behavior of three benthic fish species

Wiegleb, Joschka; Hirsch, Philipp E.; Egger, Bernd; Seidel, Frank 1; Burkhardt-Holm, Patricia
1 Institut für Wasser und Gewässerentwicklung (IWG), Karlsruher Institut für Technologie (KIT)

Abstract:

Modern ethohydraulics is the study of the behavioral responses of swimming fish to flow fields. However, the exact drag forces experienced by fish remain poorly studied; this information is required to obtain a better understanding of the behavioral responses of fish and their current resistance strategies. We measured near-ground frontal drag forces on preserved individuals of three benthic fish species, round goby (Neogobius melanstomus), gudgeon (Gobio gobio) and bullhead (Cottus gobio), in a flow channel. The forces were compared to acoustic Doppler velocity (ADV) measurements and fish tracking data based on video observations of live fish in the flow channel. Overall, we observed drag coefficients (CD) of ∼10$^{-3}$ at Reynolds numbers ∼10$^{5}$. The frontal drag forces acting on preserved fish with non-spread fins ranged from -1.96 mN*g$^{-1}$ (force per fish wet weight, velocity 0.55 m*s$^{-1}$) to 11.01 mN*g$^{-1}$ (velocity 0.85 m*s$^{-1}$). Spreading the fins strongly increased the drag forces for bullhead and round goby. In contrast, the drag forces were similar for gudgeon with spread fins and all fish with non-spread fins. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000123069
Veröffentlicht am 01.09.2020
Originalveröffentlichung
DOI: 10.1016/j.limno.2020.125812
Scopus
Zitationen: 3
Web of Science
Zitationen: 3
Dimensions
Zitationen: 2
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Wasser und Gewässerentwicklung (IWG)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 09.2020
Sprache Englisch
Identifikator ISSN: 0075-9511
KITopen-ID: 1000123069
Erschienen in Limnologica
Verlag Elsevier
Band 84
Seiten Article: 125812
Schlagwörter Drag force, Benthic fish, Bullhead, Gudgeon, Round goby, Flow resistance, Swimming
Nachgewiesen in Web of Science
Dimensions
Scopus
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