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11 Νοε 2007 · Fish in schools or current-swept habitats can benefit from altered flows using two distinct though not mutually exclusive mechanisms: flow refuging (exploiting regions of reduced flow relative to the earth frame of reference) and vortex capture (harnessing the energy of environmental vortices).
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Oxygen consumption for salmon increases in turbulence (grey)...
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20 Ιουν 2022 · Breaking free from our bias of ‘boat-propeller’ thinking, studies show that substantial thrust in the form of negative pressure generated at the head sucks the fish forward, analogous to lift generated from an airplane wing. The head and undulating body itself can also pump out low pressure regions that create thrust along sections of the body.
24 Μαρ 2016 · Fish move their heads in a way that minimizes pressure up to 50%, establishing a twofold greater sensitivity to an external stimulus than would otherwise be possible .
A lateral line system allows it to detect vibrations and pressure changes in water, helping the fish to respond appropriately to external events. [3] Well developed fins are used for maintaining balance, braking and changing direction. The pectoral fins act as pivots around which the fish can turn rapidly and steer itself.
As a fish moves towards the surface, water pressure decreases and gas inside its swim bladder expands. It normally compensates by re-absorbing gas into its bloodstream, or, in those fish species with swim bladders that connect to their mouths, by burping or venting gas from the mouth.
15 Μαρ 2023 · The deep-bodied (low fineness) pectoral fin swimmers (A. vaigiensis and C. strigosus) were the most efficient at station holding in oscillating, wave-surge water flows. Keywords: Wave surge, Cost of swimming, Respirometry, Maneuvering, Body fineness, Labriform.
If delay lines were implemented in the fish lateral line system, flow-sensitive central units should be found, which respond exclusively to a head-to-tail flow, are tuned to a particular bulk flow velocity, and are insensitive to flow fluctuations.
