The image to the left is Two Trout and Reflection by Neil Welliver
 

Jeffrey A. Walker

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Publications available in Adobe Acrobat (PDF) format
     
 
2007
 Walker, J.A. A general model of functional constraints on phenotypic evolution. American Naturalist,170: 681-689. More...
 
2005
Walker, J. A., Ghalambor, C. K., Griset, O. L., McKenney, D. and Reznick, D. N. Do faster starts increase the probability of evading predators? Functional Ecology 19, 808-815.
 
2004
 Walker, J. A. Kinematics and performance of median and paired fins as control surfaces. IEEE Journal of Oceanic Engineering 29, 572-584.
 
2004
 Westneat, M. W., Thorsen, D. H., Walker, J. A. and Hale, M. E. Structure, function and neural control of pectoral fins in fishes. IEEE Journal of Ocean Engineering 29, 674-683.
 
2004
 Walker, J. A. Dynamics of pectoral fin rowing in a fish with an extreme rowing stroke: the threespine stickleback (Gasterosteus aculeatus). Journal of Experimental Biology, 207: 1925-1939.
 
2004
 Ghalambor, C. K., D. N. Reznick, and J. A. Walker. Constraints on adaptive evolution: the functional trade-off between reproduction and fast start escape performance in the guppy (Poecilia reticulata). American Naturalist, 164:38-50
 
2003
 Ghalambor, C. K., J. A. Walker, and D. N. Reznick. Multi-trait selection, adaptation, and constraints on the evolution of burst swimming performance. Integrative and Comparative Biology, 43:431-438.
 

2002

 

 Walker, J.A. and M. W. Westneat. Kinematics, dynamics, and energetics of rowing and flapping propulsion. Integrative and Comparative Biology, 42:1032-1043
 
2002
 Walker, J. A. Rotational lift: Something different or more of the same? Journal of Experimental Biology, 205:3783-3792.
 
2002

Walker, J. A. Functional morphology and virtual models: Physical constraints on the design of oscillating wings, fins, legs, and feet at intermediate Reynolds numbers. Integrative and Comparative Biology, 42:232-242
 

2002

 

 Ramamurti, R., W. C. Sandberg, R. Löhner, J. A. Walker, and M. W. Westneat. Fluid dynamics of flapping aquatic flight in the bird wrasse: 3-D unsteady computations with fin deformation. Journal of Experimental Biology, 205:2997-3008.
 

2002

 

 Walker, J.A and M.W. Westneat. Performance limits of labriform propulsion and correlates with fin shape and motion. Journal of Experimental Biology 205:177-187.
 
2000

Walker, J.A. The ability of geometric morphometric methods to estimate a known covariance matrix. Systematic Biology, 49:686-696.
 
2000
 Walker, J.A. and M.A. Bell. Net evolutionary trajectories of body shape evolution within a microgeographic radiation of threespine sticklebacks. Journal of Zoology, 252:293-302.
 
2000
 Walker, J.A. Does a rigid body limit maneuverability? Journal of Experimental Biology 203:3391-3396
 
2000
 Walker, J.A. and M.W. Westneat. Mechanical performance of aquatic rowing and flying. Proceedings of the Royal Society of London, Series B, 267:1875-1881
 
1998
 Walker, J.A. Estimating velocities and accelerations of animal locomotion: A simulation experiment comparing numerical differentiation algorithms. Journal of Experimental Biology, 201:981-985
 
1997
 Walker, J.A. and M.W. Westneat. Labriform propulsion in fishes: Kinematics of flapping aquatic flight in the bird wrasse, Gomphosus varius (Labridae). Journal of Experimental Biology, 200, 1549Ð1569
 
1997
 Westneat, M.W. and J.A. Walker. Motor patterns of labriform locomotion: Kinematic and electromyographic analysis of pectoral fin swimming in the labrid fish Gomphosus varius (Labridae). Journal of Experimental Biology, 200, 1881Ð1893
 
1997
 Walker, J.A. Ecological morphology of lacustrine threespine stickleback Gasterosteus aculeatus L. (Gasterosteidae) body shape. Biological Journal of the Linnean Society, 61:3-50

 

 

morphometric keywords: geometric morphometrics, procrustes, relative warps, deformation, shape, size, multivariate, principal components analysis, allometry
biomechanics keywords: locomotion, swimming, flying, fluid dynamics, blade-element model, fin, wing, efficiency, energetics, turning, review, comparative method
fish keywords: body shape, stickleback, guppy, poecilia, gasterosteus, wrasse
functional ecology and evolution keywords: ecomorphology, adaptive evolution, convergence, niche, anti-predator, plankton, benthic, limnetic, steady swimming, cruising, constraints, trade-offs, facilitations, G matrix, quantitative genetics, Lande, Arnold, direction of evolution, bias, predators, prey, evolvability, life-history, behavior, diversity, models