Browsing FAS Scholarly Articles by Keyword "fish"
Now showing items 1-13 of 13
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A biorobotic model of the suction-feeding system in largemouth bass: the roles of motor program speed and hyoid kinematics
(The Company of Biologists, 2016)The vast majority of ray-finned fishes capture prey through suction feeding. The basis of this behavior is the generation of subambient pressure through rapid expansion of a highly kinetic skull. Over the last four decades, ... -
Challenging zebrafish escape responses by increasing water viscosity
(The Company of Biologists, 2012)Escape responses of fishes have long been studied as a model locomotor behavior in which hypothesized maximal or nearmaximal muscle power output is used to generate rapid body bending. In this paper we present the results ... -
The effect of fin ray flexural rigidity on the propulsive forces generated by a biorobotic fish pectoral fin
(The Company of Biologists, 2010)A biorobotic pectoral fin was developed and used to study how the flexural rigidities of fin rays within a highly deformable fish fin affect the fin’s propulsive forces. The design of the biorobotic fin was based on a ... -
Escaping Flatland: three-dimensional kinematics and hydrodynamics of median fins in fishes
(The Company of Biologists, 2008)Fish swimming has often been simplified into the motions of a two-dimensional slice through the horizontal midline, as though fishes live in a flat world devoid of a third dimension. While fish bodies do undulate primarily ... -
Escaping the flow: boundary layer use by the darter Etheostoma tetrazonum (Percidae) during benthic station holding
(The Company of Biologists, 2011)Aquatic habitats characterized by directional water flow (lotic environments) pose numerous challenges to their inhabitants, including the constant threat of dislodgement and downstream transport. As a result, many organisms ... -
Fish biorobotics: kinematics and hydrodynamics of self-propulsion
(The Company of Biologists, 2007)As a result of years of research on the comparative biomechanics and physiology of moving through water, biologists and engineers have made considerable progress in understanding how animals moving underwater use their ... -
The hydrodynamics of eel swimming: I. Wake structure
(The Company of Biologists, 2004)Eels undulate a larger portion of their bodies while swimming than many other fishes, but the hydrodynamic consequences of this swimming mode are poorly understood. In this study, we examine in detail the hydrodynamics of ... -
The mechanical scaling of coasting in zebrafish (Danio rerio)
(The Company of Biologists, 2005)Many fish species span two or three orders of magnitude in length during the growth from larvae to adults, and this change may have dramatic consequences for locomotor performance. We measured how the performance of coasting ... -
Non-invasive measurement of instantaneous forces during aquatic locomotion: a case study of the bluegill sunfish pectoral fin
(The Company of Biologists, 2007)Swimming and flying animals generate unsteady locomotive forces by delivering net momentum into the fluid wake. Hence, swimming and flying forces can be quantified by measuring the momentum of animal wakes. A recently ... -
Rajiform locomotion: three-dimensional kinematics of the pectoral fin surface during swimming in the freshwater stingray Potamotrygon orbignyi
(The Company of Biologists, 2012)Rajiform locomotion in fishes is dominated by distinctive undulations of expanded pectoral fins. Unlike other fishes, which typically interact with the fluid environment via multiple fins, undulating rays modulate a single ... -
A robotic fish caudal fin: effects of stiffness and motor program on locomotor performance
(The Company of Biologists, 2011)We designed a robotic fish caudal fin with six individually moveable fin rays based on the tail of the bluegill sunfish, Lepomis macrochirus. Previous fish robotic tail designs have loosely resembled the caudal fin of ... -
Speed-dependent intrinsic caudal fin muscle recruitment during steady swimming in bluegill sunfish, Lepomis macrochirus
(The Company of Biologists, 2008)There are approximately 50 muscles that control tail fin shape in most teleost fishes, and although myotomal muscle function has been extensively studied, little work has been done on the intrinsic musculature that controls ... -
Undulatory locomotion of flexible foils as biomimetic models for understanding fish propulsion
(The Company of Biologists, 2014)An undulatory pattern of body bending in which waves pass along the body from head to tail is a major mechanism of creating thrust in many fish species during steady locomotion. Analyses of live fish swimming have provided ...