Impact of Caudal Fin Shape on Thrust Production of a Thunniform Swimmer

Matta, Alexander; Pendar, Hodjat; Battaglia, Francine; Bayandor, Javid

doi:10.1007/s42235-020-0020-9

Cited by 21 publications

(9 citation statements)

References 47 publications

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“…By using synthetic fins of increasing length, we mimicked the elongation process observed during regeneration, whereas the use of different widths allowed us to reproduce the effect of narrowing the caudal fins. We predicted that modifying the geometry and biomechanical properties of the stump would alter the hydrodynamic forces acting on the forming tissue (Dagenais and Aegerter, 2021;Feilich and Lauder, 2015;Low and Chong, 2010;Lucas et al, 2017;Matta et al, 2020;Valdivia y Alvarado and Youcef-Toumi, 2005), and thus modulate the structure of the regenerated appendage. Therefore, varying the surface area of the caudal fin through the ablation of specific fin rays should induce changes in the bifurcation pattern and final length of the rays after regeneration.…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic stress and phenotypic plasticity of the zebrafish regenerating fin

Dagenais

Blanchoud

Pury

et al. 2021

Journal of Experimental Biology

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Understanding how extrinsic factors modulate genetically encoded information to produce a specific phenotype is of prime scientific interest. In particular, the feedback mechanism between abiotic forces and locomotory organs during morphogenesis to achieve efficient movement is a highly relevant example of such modulation. The study of this developmental process can provide unique insights on the transduction of cues at the interface between physics and biology. Here, we take advantage of the natural ability of adult zebrafish to regenerate their amputated fins to assess its morphogenic plasticity upon external modulations. Using a variety of surgical and chemical treatments, we are able to induce phenotypic responses to the structure of the fin. Through the ablation of specific rays in regenerating caudal fins, we generate artificially narrowed appendages in which the fin cleft depth and the positioning of rays bifurcations are perturbed compared to normal regenerates. To dissect the role of mechanotransduction in this process, we investigate the patterns of hydrodynamic forces acting on the surface of a zebrafish fin during regeneration by using particle tracking velocimetry on a range of biomimetic hydrofoils. This experimental approach enables us to quantitatively compare hydrodynamic stress distributions over flapping fins of varying sizes and shapes. As a result, viscous shear stress acting on the distal margin of regenerating fins and the resulting internal tension are proposed as suitable signals for guiding the regulation of ray growth dynamics and branching pattern. Our findings suggest that mechanical forces are involved in the fine-tuning of the locomotory organ during fin morphogenesis.

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Section: Introductionmentioning

confidence: 99%

Hydrodynamic stress and phenotypic plasticity of the zebrafish regenerating fin

Dagenais

Blanchoud

Pury

et al. 2021

Journal of Experimental Biology

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“…On the other hand, inspired by seal, we incorporate the fish’s caudal fin with deformation ability. According to [ 10 , 33 , 34 ], during one flapping cycle, the caudal fin of robotic fish generates both thrust and drag. In order to increase the mean driving force, the caudal fin is designed to rise its area during the time slice that generates thrust, and reduce the area during the time slice that produces drag.…”

Section: Methodsmentioning

confidence: 99%

“…It was found that the lunar caudal fin, most similar to a fusiform swimmer, had the largest thrust, followed by the elliptical fin. The rectangular caudal fin generally generated the least thrust [ 8 , 9 , 10 ]. Similar conclusions can also be found in [ 11 , 12 , 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Thrust Improvement of a Biomimetic Robotic Fish by Using a Deformable Caudal Fin

et al. 2022

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In nature, live fish has various deformable fins which are capable to promote the swimming speed, efficiency, stability, and thrust generation. However, this feature is rarely possessed by current man-made biomimetic robotic fishes. In this paper, a novel deformable caudal fin platform is proposed to improve thrust generation of biomimetic robotic fish. First, the design of the deformable caudal fin is given, which includes a servo motor, a gear-based transmission mechanism, fin bones, and silica membrane. Second, an improved Central Pattern Generator (CPG) model was developed to coordinately control the flapping of the tail and the deformation of the caudal fin. More specifically, three deformation patterns, i.e., conventional nondeformable mode, sinusoidal-based mode, instant mode, of the caudal fin are investigated. Third, extensive experiments are conducted to explore the effects of deformation of the caudal fin on the thrust generation of the biomimetic robotic fish. It was found that the instant mode of the caudal fin has the largest thrust, which sees a 27.5% improvement compared to the conventional nondeformable mode, followed by the sinusoidal-based mode, which also sees an 18.2% improvement. This work provides a novel way to design and control the deformation of the caudal fin, which sheds light on the development of high-performance biomimetic robotic fish.

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“…To test this hypothesis, we set out to modify the biomechanical properties of the stump and assess whether it alters the regenerated fin and the bony rays. Indeed, geometrical changes are expected to alter the hydrodynamic forces acting on the surfaces of the appendage, including the region of forming tissue (Dagenais and Aegerter, 2021;Feilich and Lauder, 2015;Low and Chong, 2010;Lucas et al, 2017;Matta et al, 2020;Valdivia y Alvarado and Youcef-Toumi, 2005).…”

Section: Modulating the Biomechanical Properties Of Regenerated Finsmentioning

confidence: 99%

Hydrodynamic stress and phenotypic plasticity of the zebrafish regenerating fin

Dagenais

Blanchoud

Pury

et al. 2021

Preprint

View full text Add to dashboard Cite

Understanding how extrinsic factors modulate genetically encoded information to produce a specific phenotype is of prime scientific interest. In particular, the feedback mechanism between abiotic forces and locomotory organs during morphogenesis to achieve efficient movement is a highly relevant example of such modulation. The study of this developmental process can provide unique insights on the transduction of cues at the interface between physics and biology. Here, we take advantage of the natural ability of adult zebrafish to regenerate their amputated fins to assess its morphogenic plasticity upon external modulations. Using a variety of surgical and chemical treatments, we are able to induce phenotypic responses to the structure of the fin. In particular, fin cleft depth and the bifurcation of the bony rays are modulated by the surface area of the stump. To dissect the role of mechanotransduction in this process, we investigate the patterns of hydrodynamic forces acting on the surface of a zebrafish fin during regeneration by using particle tracking velocimetry on a range of biomimetic hydrofoils. This experimental approach enables us to quantitatively compare hydrodynamic stress distributions over flapping fins of varying sizes and shapes. As a result, viscous shear stress acting on the tip of the fin and the resulting internal tension are proposed as suitable signals for guiding the regulation of ray growth dynamics and branching pattern. Our findings suggest that mechanical forces are involved in the fine-tuning of the locomotory organ during fin morphogenesis.

show abstract

Impact of Caudal Fin Shape on Thrust Production of a Thunniform Swimmer

Cited by 21 publications

References 47 publications

Hydrodynamic stress and phenotypic plasticity of the zebrafish regenerating fin

Hydrodynamic stress and phenotypic plasticity of the zebrafish regenerating fin

Thrust Improvement of a Biomimetic Robotic Fish by Using a Deformable Caudal Fin

Hydrodynamic stress and phenotypic plasticity of the zebrafish regenerating fin

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