... prevented growing guinea fowl ( Numida meleagris ) from jumping. We compared the jump performance of our treatment group at maturity with that of controls and measured the morphology of the gastrocnemius elastic system. We found that restricted birds jumped with lower jump power and work, yet there were...

... Three-dimensional Numida meleagris X-ray Animation Analyses of avian bipedalism typically focus on steady locomotion. Birds are predominantly studied moving forward over level ground at relatively constant speeds in both kinematic ( Cracraft, 1971 ; Jacobson and Hollyday, 1982 ; Muir et...

... these factors, we measured electromyographic activity in eight hindlimb muscles of the guinea fowl ( Numida meleagris , N =6) during treadmill locomotion at two speeds (0.7 and 1.3 m s −1 ) and three terrain conditions at each speed: (i) level, (ii) repeated 5 cm low-contrast obstacles (<10% contrast, black...

..., J. A. ( 2002 ). Mechanical function of a `hamstring' muscle in running guinea fowl. Physiologist 45 , 311 . Ellerby, D. J., Cleary, M., Marsh, R. L. and Buchanan, C. I. ( 2003 ). Measurement of maximum oxygen consumption in guinea fowl Numida meleagris indicates that birds and mammals...

... fowl Numida meleagris locomotion backpack loading blood flow oxygen consumption energy use load carrying References Buchanan, C. I. ( 1999 ). Muscle function and tendon adaptation in guinea fowl ( Numida meleagris ) trained to run on different slopes. PhD thesis , Northeastern...

...Richard L. Marsh; David J. Ellerby; Havalee T. Henry; Jonas Rubenson SUMMARY We examined the energetic cost of loading the trunk or distal portion of the leg in walking and running guinea fowl ( Numida meleagris ). These different loading regimes were designed to separately influence the energy use...

... Laboratory, The Royal Veterinary College, North Mymms, Herts, AL9 7TA, UK 15 11 2005 © The Company of Biologists Limited 2006 2006 center of mass energy mechanics kinetic energy potential energy initial velocity mass-spring model guinea fowl Numida meleagris ground reaction...

... ). Home range size,breeding behavior, and activities of helmeted guineafowl Numida meleagris in Nigeria. J. West. African. Ornithol. Soc. 5 , 37 -43. Bennet-Clark, H. C. ( 1975 ). The energetics of the jump of the locust Schistocera gregaria. J. Exp. Biol. 63 , 53 -83. Bennet-Clark, H...

... fowl Numida meleagris lateral gastrocnemius (LG) and digital flexor-IV (DF-IV), during level and incline locomotion. During level locomotion, the LG and DF-IV exhibit differing muscle fascicle strain patterns: the LG shortens by 10-15% while developing force,whereas the DF-IV undergoes a stretch...

... animals utilize this strategy, the input impedance of the respiratory system of five anesthetized, supine guinea fowl ( Numida meleagris ) was measured using a forced oscillation technique. The resonant frequency of the respiratory system was 7.12±0.27 Hz ( N =5, mean ± S.E.M.). No statistically...