Erratum to: Morphological Characterization and Hydrodynamic Behavior of Shortfin Mako Shark (Isurus oxyrinchus) Dorsal Fin Denticles

Fernandez-Waid, Patricia; Díez, G.; Iñigo, Bidaguren; Izagirre, Urtzi; Ilzarbe, Jesús María Blanco; Soto, Manu

doi:10.1007/s42235-019-0110-8

Cited by 2 publications

(2 citation statements)

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“…Jarduera ohikoenak arraste-indarrek energia erauzteko paper garrantzitsua betetzen dutenak dira; eta, beraz, hori murriztuz gero, delako gailuaren errendimendua handitu liteke. Adibide gisa, gainazal zimurtsuetan, hala nola aurretiaz aipaturiko marrazoen larruan, oinarritutako aplikazioak aipa litezke, zeinetan desplazamendua errazten den, bai eta hura sintetizatzeko egindako garapenak ere [9][10][11][12][13][14]. Hala ere, badira beste aplikazio mota batzuk; balea konkordunen bular-hegalen forman oinarritutakoak, besteak beste.…”

Section: Biomimesiaren Aplikazioak Itsas Energiak Atzemateko Gailuetanunclassified

Aplikazio biomimetikoak itsas energien atzemate-gailuetan

Izquierdo¹,

Vázquez²,

Ilzarbe³

et al. 2021

EKAIA

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Natura inspirazio-iturri gisa aztertzeak itsasotik datorren energiaz baliatzeko makinak diseinatzea eragin du. Dokumentu honek biomimesian oinarrituriko itsas gailuak aztertzen ditu, haien portaeraren ondorioz, energia bereganatzea errazten duten horietan oinarrituz [1]. Azkenik, marrazoen larruazala jariakinaren muga-geruza apurtzea ahalbidetzen duten espikula txikiz osatuta dagoenez, haren mugimenduarekiko erresistentzia murriztuz [2], eta fenomeno honetan oinarrituz, olatuak sortzeko erabiltzen diren olatu kanaletan (waveflumes) energia xahutzeko sistemetan aztertzen den aplikazioa zehaztuko da.

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Section: Biomimesiaren Aplikazioak Itsas Energiak Atzemateko Gailuetanunclassified

Aplikazio biomimetikoak itsas energien atzemate-gailuetan

Izquierdo¹,

Vázquez²,

Ilzarbe³

et al. 2021

EKAIA

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“…Various functions of denticles have been suggested, including protection from parasites and abrasion (Raschi & Tabit, 1992), defense (Raschi & Tabit, 1992), focusing bioluminescent signals (Reif, 1985b), and even holding prey against the body during feeding (Southall & Sims, 2003). Substantial effort has also been directed toward studying the hydrodynamic properties of denticles which have been proposed to include both drag reduction (Bechert, Hoppe, & Reif, 1985; Fernandez‐Waid et al, 2019; Lang, Motta, Hidalgo, & Westcott, 2008; Reif, 1985a), and lift and thrust enhancement (Domel et al, 2018; Oeffner & Lauder, 2012; Wen, Weaver, & Lauder, 2014). Hydrodynamic testing of flexible and rigid foils covered with 3D‐printed biomimetic denticles has provided a better understanding of shark skin hydrodynamics (Domel et al, 2018; Domel, Saadat, et al, 2018; Wen, Weaver, Thornycroft, & Lauder, 2015), but we still lack an understanding of how denticle morphology is related to the flow regime on different areas of the shark body surface.…”

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confidence: 99%

The denticle surface of thresher shark tails: Three‐dimensional structure and comparison to other pelagic species

Popp

White

Bernal

et al. 2020

Journal of Morphology

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Shark skin denticles (scales) are diverse in morphology both among species and across the body of single individuals, although the function of this diversity is poorly understood. The extremely elongate and highly flexible tail of thresher sharks provides an opportunity to characterize gradients in denticle surface characteristics along the length of the tail and assess correlations between denticle morphology and tail kinematics. We measured denticle morphology on the caudal fin of three mature and two embryo common thresher sharks (Alopias vulpinus), and we compared thresher tail denticles to those of eleven other shark species. Using surface profilometry, we quantified 3D-denticle patterning and texture along the tail of threshers (27 regions in adults, and 16 regions in embryos). We report that tails of thresher embryos have a membrane that covers the denticles and reduces surface roughness. In mature thresher tails, surfaces have an average roughness of 5.6 μm which is smoother than some other pelagic shark species, but similar in roughness to blacktip, porbeagle, and bonnethead shark tails. There is no gradient down the tail in roughness for the middle or trailing edge regions and hence no correlation with kinematic amplitude or inferred magnitude of flow separation along the tail during locomotion. Along the length of the tail there is a leading-to-trailing-edge gradient with larger leading edge denticles that lack ridges (average roughness = 9.6 μm), and smaller trailing edge denticles with 5 ridges (average roughness = 5.7 μm). Thresher shark tails have many missing denticles visible as gaps in the surface, and we present evidence that these denticles are being replaced by new denticles that emerge from the skin below.

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Erratum to: Morphological Characterization and Hydrodynamic Behavior of Shortfin Mako Shark (Isurus oxyrinchus) Dorsal Fin Denticles

Cited by 2 publications

References 0 publications

Aplikazio biomimetikoak itsas energien atzemate-gailuetan

Aplikazio biomimetikoak itsas energien atzemate-gailuetan

The denticle surface of thresher shark tails: Three‐dimensional structure and comparison to other pelagic species

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