Jeffrey A Walker

Summary

Affiliation: University of Maine
Country: USA

Publications

  1. ncbi request reprint Does a rigid body limit maneuverability?
    J A Walker
    Department of Zoology, Field Museum of Natural History, Chicago, IL 60605, USA
    J Exp Biol 203:3391-6. 2000
  2. ncbi request reprint Dynamics of pectoral fin rowing in a fish with an extreme rowing stroke: the threespine stickleback (Gasterosteus aculeatus)
    Jeffrey A Walker
    Department of Biological Sciences, University of Southern Maine, 96 Falmouth Street, Portland, ME 04103, USA
    J Exp Biol 207:1925-39. 2004
  3. ncbi request reprint Rotational lift: something different or more of the same?
    Jeffrey A Walker
    Department of Biology, University of Southern Maine, 96 Falmouth St, Portland 04103, USA
    J Exp Biol 205:3783-92. 2002
  4. ncbi request reprint Ability of geometric morphometric methods to estimate a known covariance matrix
    J A Walker
    Department of Zoology, Field Museum of Natural History, Roosevelt Road at Lake Shore Drive, Chicago, Illinois 60605, USA
    Syst Biol 49:686-96. 2000
  5. pmc Mechanical performance of aquatic rowing and flying
    J A Walker
    Department of Zoology, Field Museum of Natural History, Chicago, IL 60605, USA
    Proc Biol Sci 267:1875-81. 2000
  6. ncbi request reprint Performance limits of labriform propulsion and correlates with fin shape and motion
    Jeffrey A Walker
    Department of Biology, University of Southern Maine, 96 Falmouth Street, Portland, ME 04103
    J Exp Biol 205:177-87. 2002
  7. pmc Body fineness ratio as a predictor of maximum prolonged-swimming speed in coral reef fishes
    Jeffrey A Walker
    Department of Biological Sciences, University of Southern Maine, Portland, Maine, United States of America
    PLoS ONE 8:e75422. 2013
  8. ncbi request reprint A general model of functional constraints on phenotypic evolution
    Jeffrey A Walker
    epartment of Biology, University of Southern Maine, Portland, Maine, 04103, USA
    Am Nat 170:681-9. 2007
  9. ncbi request reprint Constraints on adaptive evolution: the functional trade-off between reproduction and fast-start swimming performance in the Trinidadian guppy (Poecilia reticulata)
    Cameron K Ghalambor
    Department of Biology, University of California, Riverside, California 92521, USA
    Am Nat 164:38-50. 2004
  10. doi request reprint An integrative model of evolutionary covariance: a symposium on body shape in fishes
    Jeffrey A Walker
    Department of Biology, University of Southern Maine, Portland, ME 04103, USA
    Integr Comp Biol 50:1051-6. 2010

Detail Information

Publications11

  1. ncbi request reprint Does a rigid body limit maneuverability?
    J A Walker
    Department of Zoology, Field Museum of Natural History, Chicago, IL 60605, USA
    J Exp Biol 203:3391-6. 2000
    ..Agility, the rate of turning, is related to maneuverability. The median- and pectoral-fin-powered turns of O. meleagris are slow relative to the body- and caudal-fin-powered turns of more flexible fish...
  2. ncbi request reprint Dynamics of pectoral fin rowing in a fish with an extreme rowing stroke: the threespine stickleback (Gasterosteus aculeatus)
    Jeffrey A Walker
    Department of Biological Sciences, University of Southern Maine, 96 Falmouth Street, Portland, ME 04103, USA
    J Exp Biol 207:1925-39. 2004
    ..The results indicate that the mechanical efficiency of pectoral fin rowing is low (0.1-0.3) relative to a flapping mechanism and possibly relative to axial undulation at comparable speeds...
  3. ncbi request reprint Rotational lift: something different or more of the same?
    Jeffrey A Walker
    Department of Biology, University of Southern Maine, 96 Falmouth St, Portland 04103, USA
    J Exp Biol 205:3783-92. 2002
    ....
  4. ncbi request reprint Ability of geometric morphometric methods to estimate a known covariance matrix
    J A Walker
    Department of Zoology, Field Museum of Natural History, Roosevelt Road at Lake Shore Drive, Chicago, Illinois 60605, USA
    Syst Biol 49:686-96. 2000
    ....
  5. pmc Mechanical performance of aquatic rowing and flying
    J A Walker
    Department of Zoology, Field Museum of Natural History, Chicago, IL 60605, USA
    Proc Biol Sci 267:1875-81. 2000
    ..The predictions of the model are supported by observed patterns of behavioural variation among rowing and flapping vertebrates...
  6. ncbi request reprint Performance limits of labriform propulsion and correlates with fin shape and motion
    Jeffrey A Walker
    Department of Biology, University of Southern Maine, 96 Falmouth Street, Portland, ME 04103
    J Exp Biol 205:177-87. 2002
    ....
  7. pmc Body fineness ratio as a predictor of maximum prolonged-swimming speed in coral reef fishes
    Jeffrey A Walker
    Department of Biological Sciences, University of Southern Maine, Portland, Maine, United States of America
    PLoS ONE 8:e75422. 2013
    ..Our results suggest that the widespread hypothesis that a more optimal fineness increases endurance-swimming performance via reduced drag should be limited to fishes that swim with rigid bodies. ..
  8. ncbi request reprint A general model of functional constraints on phenotypic evolution
    Jeffrey A Walker
    epartment of Biology, University of Southern Maine, Portland, Maine, 04103, USA
    Am Nat 170:681-9. 2007
    ..Finally, it is shown that genetic covariances between m-p traits and performance traits are a function of the F matrix, but a G matrix that includes these covariances cannot be used to model functional constraints effectively...
  9. ncbi request reprint Constraints on adaptive evolution: the functional trade-off between reproduction and fast-start swimming performance in the Trinidadian guppy (Poecilia reticulata)
    Cameron K Ghalambor
    Department of Biology, University of California, Riverside, California 92521, USA
    Am Nat 164:38-50. 2004
    ..This functional trade-off between reproduction and swimming performance reveals how different aspects of the phenotype are integrated and highlights the complexity of adaptation at the whole-organism level...
  10. doi request reprint An integrative model of evolutionary covariance: a symposium on body shape in fishes
    Jeffrey A Walker
    Department of Biology, University of Southern Maine, Portland, ME 04103, USA
    Integr Comp Biol 50:1051-6. 2010
    ....
  11. ncbi request reprint Fluid dynamics of flapping aquatic flight in the bird wrasse: three-dimensional unsteady computations with fin deformation
    Ravi Ramamurti
    Laboratory for Computational Physics and Fluid Dynamics, Naval Research Laboratory, Washington, DC 20375 5344, USA
    J Exp Biol 205:2997-3008. 2002
    ....