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- W4308679296 abstract "ABSTRACT Many fishes use their tail as the main thrust producer during swimming. This fin's diversity in shape and size influences its physical interactions with water as well as its ecological functions. Two distinct tail morphologies are common in bony fishes: flat, truncate tails which are best suited for fast accelerations via drag forces, and forked tails that promote economical, fast cruising by generating lift-based thrust. This assumption is based primarily on studies of the lunate caudal fin of Scombrids (i.e. tuna, mackerel), which is comparatively stiff and exhibits an airfoil-type cross-section. However, this is not representative of the more commonly observed and taxonomically widespread flexible forked tail, yet similar assumptions about economical cruising are widely accepted. Here, we present the first comparative experimental study of forked versus truncate tail shape and compare the fluid mechanical properties and energetics of two common nearshore fish species. We examined the hypothesis that forked tails provide a hydrodynamic advantage over truncate tails at typical cruising speeds. Using experimentally derived pressure fields, we show that the forked tail produces thrust via acceleration reaction forces like the truncate tail during cruising but at increased energetic costs. This reduced efficiency corresponds to differences in the performance of the two tail geometries and body kinematics to maintain similar overall thrust outputs. Our results offer insights into the benefits and tradeoffs of two common fish tail morphologies and shed light on the functional morphology of fish swimming to guide the development of bio-inspired underwater technologies." @default.
- W4308679296 created "2022-11-14" @default.
- W4308679296 creator A5018198934 @default.
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- W4308679296 date "2022-11-15" @default.
- W4308679296 modified "2023-09-26" @default.
- W4308679296 title "A tale of two fish tails: does a forked tail really perform better than a truncate tail when cruising?" @default.
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- W4308679296 doi "https://doi.org/10.1242/jeb.244967" @default.
- W4308679296 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36354328" @default.
- W4308679296 hasPublicationYear "2022" @default.
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