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Keywords: guinea fowl
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Journal Articles
J Exp Biol (2021) 224 (21): jeb242694.
Published: 10 November 2021
... 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...
Includes: Supplementary data
Journal Articles
J Exp Biol (2011) 214 (8): 1369–1378.
Published: 15 April 2011
... to investigate the locomotor biomechanics of helmeted guinea fowl traversing slippery surfaces at variable running speeds (1.3–3.6 m s –1 ). Falls were circumvented when limb contact angles exceeded 70 deg, though lower angles were tolerated at faster running speeds (>3.0 m s –1 ). These prerequisites...
Includes: Multimedia, Supplementary data
Journal Articles
J Exp Biol (2008) 211 (14): 2303–2316.
Published: 15 July 2008
... as demand changes. In order to determine the extent to which synergist muscles are functionally heterogeneous, and whether this heterogeneity is altered with changes in demand, we examined the in vivo function of the lateral (LG) and medial (MG) gastrocnemius muscles of helmeted guinea fowl ( Numida...
Journal Articles
J Exp Biol (2006) 209 (13): 2395–2408.
Published: 01 July 2006
... of guinea fowl running on the level and uphill using both organismal energy expenditure(oxygen consumption) and muscle blood flow measurements. We tested each bird under four conditions: (1) rest, (2) a moderate-speed level run at 1.5 m s –1 , (3) an incline run at 1.5 m s –1 with a 15% gradient and (4...
Journal Articles
J Exp Biol (2006) 209 (11): 2064–2075.
Published: 01 June 2006
...David J. Ellerby; Richard L. Marsh SUMMARY We examined the changes in muscle energy use in guinea fowl running at 1.5 m s -1 either unloaded, or carrying trunk loads equal to 23% of body mass, or loads on their distal legs equal to a total of 5% of body mass. We estimated muscle energy use...
Journal Articles
J Exp Biol (2006) 209 (11): 2050–2063.
Published: 01 June 2006
...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...
Journal Articles
J Exp Biol (2006) 209 (1): 57–65.
Published: 01 January 2006
... physiologically normal levels of bone strain. Two age-matched groups of juvenile guinea fowl Numida meleagris ran on a treadmill set at either 0° (Level group) or 20° (Incline group), for 10 min per day over a 45-day treatment period. Birds running on the 20° inclined treadmill used more-flexed knees than those...
Journal Articles
J Exp Biol (2006) 209 (1): 171–187.
Published: 01 January 2006
.... In this paper, we perturb the running of guinea fowl with an unexpected drop in substrate height (Δ H ). The drop is camouflaged to remove any visual cue about the upcoming change in terrain that would allow an anticipatory response. To maintain stability upon a sudden drop in substrate height and prevent...
Includes: Multimedia, Supplementary data
Journal Articles
J Exp Biol (2005) 208 (17): 3293–3302.
Published: 01 September 2005
... for ground-dwelling birds such as phasianids. We hypothesized that by making use of elastic energy storage and release, the leg muscles could provide the large power outputs needed for achieving high velocities after takeoff. We investigated the performance of the leg muscles of the guinea fowl Numida...
Journal Articles
J Exp Biol (2003) 206 (17): 2941–2958.
Published: 01 September 2003
... performance during steady level locomotion, morphology also affects its capacity and mechanism for altering work output for different locomotor tasks. We investigated the extent of force and energy modulation by two hind limb support muscles of the guinea fowl in response to changes in mechanical demands...