Douglas L Altshuler
Affiliation: California Institute of Technology
- Resolution of a paradox: hummingbird flight at high elevation does not come without a costDouglas L Altshuler
Section of Integrative Biology, University of Texas, Austin, TX 78712, USA
Proc Natl Acad Sci U S A 101:17731-6. 2004..In contrast to hovering, excess power availability decreased substantially across elevations, thereby reducing the biomechanical potential for more complex flight such as competitive and escape maneuvers...
- Ecology and evolution. Darwin's hummingbirdsDouglas L Altshuler
Department of Bioengineering, California Institute of Technology, Pasadena, CA 91104, USA
Science 300:588-9. 2003
- Kinematics of hovering hummingbird flight along simulated and natural elevational gradientsDouglas L Altshuler
Section of Integrative Biology, University of Texas at Austin, Austin, Texas 78712, USA
J Exp Biol 206:3139-47. 2003..By contrast, increases in wingbeat frequency impose substantial metabolic demands, are only elicited transiently and anaerobically, and cannot be used to generate additional sustained lift at high elevations...
- Of hummingbirds and helicopters: hovering costs, competitive ability, and foraging strategiesDouglas L Altshuler
Section of Integrative Biology, University of Texas, Austin, Texas 78712, USA
Am Nat 163:16-25. 2004..However, the WDL-helicopter dynamics model has been instrumental in calling attention to the importance of comparative wing morphology and related aerodynamics for understanding the behavioral ecology of hummingbirds...
- Flight performance and competitive displacement of hummingbirds across elevational gradientsDouglas L Altshuler
Bioengineering, California Institute of Technology, Pasadena, California 91125, USA
Am Nat 167:216-29. 2006..A minimum value for burst power may be required for successful competition, but other maneuverability features gain importance when all competitors have sufficient muscle power, as occurs at low elevations...
- Short-amplitude high-frequency wing strokes determine the aerodynamics of honeybee flightDouglas L Altshuler
Bioengineering, California Institute of Technology, Pasadena, 91125, USA
Proc Natl Acad Sci U S A 102:18213-8. 2005..We suggest that the peculiar kinematics of bees may reflect either a specialization for increasing load capacity or a physiological limitation of their flight muscles...
- The ecological and evolutionary interface of hummingbird flight physiologyDouglas L Altshuler
Section of Integrative Biology, University of Texas at Austin, Austin, TX 78712, USA
J Exp Biol 205:2325-36. 2002....
- Take-off mechanics in hummingbirds (Trochilidae)Bret W Tobalske
Department of Biology, University of Portland, 5000 North Willamette Boulevard, Portland, OR 97203, USA
J Exp Biol 207:1345-52. 2004..Thus, hummingbirds are capable of modulating their leg and wingbeat kinetics to increase take-off velocity...
- Oxygen consumption rates in hovering hummingbirds reflect substrate-dependent differences in P/O ratios: carbohydrate as a 'premium fuel'Kenneth C Welch
Department of Ecology, Evolution and Marine Biology, University of California, Santa Barbara, CA 93106 9610, USA
J Exp Biol 210:2146-53. 2007..The requirement for less oxygen when oxidizing carbohydrate suggests that carbohydrate oxidation may facilitate hovering flight in hummingbirds at high altitude...
- Phylogenetic systematics and biogeography of hummingbirds: Bayesian and maximum likelihood analyses of partitioned data and selection of an appropriate partitioning strategyJimmy A McGuire
Museum of Vertebrate Zoology, 3101 Valley Life Sciences Building, University of California, Berkeley, CA 94720 3160, USA
Syst Biol 56:837-56. 2007....