ELLERBY, DJ; ASKEW, GN; ALTRINGHAM, JD; University of Leeds; University of Leeds; University of Leeds: Pectoralis muscle power modulation in small birds Most vertebrates are able to modulate the power output of their muscles by recruiting motor units with different intrinsic properties (i.e. fast or slow fibres). In many small birds the pectoralis muscles, the […]

HAMILTON, JL*; RITTER, DA; GOSLOW, GE; Brown University, Providence, RI: Muscle activity patterns during swimming in Thick-billed murres (Uria lomvia) Birds in the Family Alcidae use their wings for propulsion in air and also in water, a medium that is 800x denser and 70x more viscous. As part of a larger project investigating how Alcids […]

HOOGENDYK, T.A.*; CARR, J.A.; HENRY, H.T.; RUBENSON, J.; MARSH, R.L.; Northeastern University, Boston, Massachusetts: Mechanical and neural determinants of differences in fascicle strain between functionally distinct compartments in M. Iliofibularis during terrestrial locomotion in guinea fowl (Numida meleagris). Although the gross morphology of M. Iliofibularis (IF) in Galliformes is suggestive of an architecturally simple two-joint […]

YOO, E.H.; MCGUIGAN, M.P.; BIEWENER, A.A.; Harvard University, Concord Field Station; Harvard University, Concord Field Station; Harvard University, Concord Field Station: In vivo strain and activation patterns of an ankle extensor in pygmy goats (Capra hircus) during incline versus level locomotion When animals move at different gaits and different slopes, their leg muscles change function […]

RICHARDS, C. T.; BIEWENER, A. A.; Harvard University; Harvard University: In vivo dynamic force-length properties in the Xenopus laevis plantaris muscle In vivo plantaris activation and length were recorded by sonomicrometry and electromyography (EMG). Measurements of force were obtained from a calibrated stain gauge transducer fastened to the Achilles tendon. Peak force and strain were […]

DIMOULAS, PM; HENRY, H; RUBENSON, J; MARSH, RL; Northeastern University; Northeastern University; Northeastern University; Northeastern University: Homogenous activation patterns of the anatomically compartmentalized semimembranosus muscle in Bufo marinus Locomotor muscles in vertebrates may be compartmentalized in several ways: anatomically, neuromuscularly, and functionally. We examined whether the anatomically compartmentalized semimembranosus muscle (SM) in the toad Bufo […]

CARR, JA; ELLERBY, D; HOOGENDYK, TA; RUBENSON, J; MARSH, RL; Northeastern University; Northeastern University; Northeastern University; Northeastern University; Northeastern University: Differential Strain in an Architecturally Complex Muscle Understanding the mechanical function of muscles with extensive origins and insertions is challenging. The Iliotibialis lateralis pars postacetabularis (ILPO) is the largest muscle in the hindlimb of the […]

BOUGHTON, R.K.*; BOWMAN, R; KEARNS, L; SCHOECH, S.J; Univ. of Memphis; Archbold Biological Station; Archbold Biological Station; Univ. of Memphis: Variation between suburban and wildland populations in nestling immune response of Florida Scrub-Jays Aphelocoma coerulescens In past years, a suburban population of Florida Scrub-Jays has produced fewer fledglings and fledglings of lighter mass per breeding […]

REICH, K.J.*; BJORNDAL, K.A.; BOLTEN, A.B.; University of Florida; University of Florida; University of Florida: Tracking Ontogenetic Shifts in Diet and Habitat of Juvenile Sea Turtles with Stable Isotopes With the exception of loggerheads (Caretta caretta), little is known about the habitat use and diet of juvenile sea turtles. Stable 13C and 15N isotope analyses […]

RIMKUS, Todd*; GOUVEIA, Michelle; GOMERO, Boloye; Marymount University; Marymount University; Marymount University: The effects of passive integrated transponder tag implantation on the growth of hatchling painted turtles (Chrysemys picta) The technology of passive integrated transponder (PIT) tags has allowed the marking of field specimens with certainty of identification after recapture. The effects of PIT tag […]