Suction power output and the inertial cost of rotating the neurocranium to generate suction in fish

Journal of Theoretical Biology
Sam Van WassenberghTyler Skorczewski

Abstract

To expand the buccal cavity, many suction-feeding fishes rely on a considerable contribution from dorsal rotation of the dorsal part of the head including the brains, eyes, and several bones forming the braincase and skull roof (jointly referred to as the neurocranium). As the neurocranium takes up a large part of the total mass of the head, this rotation may incur a considerable inertial cost. If so, this would suggest a significant selective pressure on the kinematics and mass distribution of the neurocranium of suction feeders. Here, an inverse dynamic model is formulated to calculate the instantaneous power required to rotate the neurocranium, approximated by a quarter ellipsoid volume of homogeneous density, as well as to calculate the instantaneous suction power based on intra-oral pressure and head volume quantifications. We applied this model to largemouth bass (Micropterus salmoides) and found that the power required to rotate the neurocranium accounts for only about 4% of the power required to suck water into the mouth. Furthermore, recovery of kinetic energy from the rotating neurocranium converted into suction work may be possible during the phase of neurocranial deceleration. Thus, we suggest that only a negligible...Continue Reading

References

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Dec 24, 2013·The Journal of Experimental Biology·Ariel L Camp, Elizabeth L Brainerd

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Citations

Jun 24, 2015·Proceedings of the National Academy of Sciences of the United States of America·Ariel L CampElizabeth L Brainerd
Sep 16, 2016·Proceedings. Biological Sciences·Timothy E HighamDavid N Reznick
Nov 4, 2016·The Journal of Experimental Biology·M J McHenryS N Patek
Apr 27, 2018·The Journal of Experimental Biology·Egon HeissSam Van Wassenbergh
Sep 22, 2018·Biology Open·Yordano E JimenezElizabeth L Brainerd
Sep 20, 2020·The Journal of Experimental Biology·Ariel L CampElizabeth L Brainerd
Jun 7, 2018·The Journal of Experimental Biology·Ariel L CampElizabeth L Brainerd

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