BERGMANN, Philip J *; RUSSELL, Anthony P: Patterns of hindlimb segment growth in various lizards and their relation to lizard ecology. Although numerous functional morphological studies have treated the lizard hindlimb as a unitary structure, correlating its length with numerous performance and ecological variables, a few more recent approaches have accommodated for the segmental nature […]
sessions: Session 54
Life-stage dependent changes and thyroid hormone-mediated plasticity in the retinal ultraviolet photoreceptor cell complement of Atlantic salmon (Salmo salar)
BROWMAN, H.I.*; HOLMQVIST, B.; FORSELL, J.; EBBESSON, L.; ALM, P.: Life-stage dependent changes and thyroid hormone-mediated plasticity in the retinal ultraviolet photoreceptor cell complement of Atlantic salmon (Salmo salar). Several salmonid fishes possess a discrete retinal photoreceptor sensitive to ultraviolet-A (UV) radiation when they are freshwater-resident juveniles (parr). The UV photoreceptor disappears from most of […]
Is the growth of juvenile rainbow trout allometric
SALMINEN, Kristine/A; GIBB, Alice/C: Is the growth of juvenile rainbow trout allometric? Traditionally, juvenile and adult fish have been assumed to show isometric growth. However, very few studies have examined this assumption. In this experiment, a lab reared cohort of rainbow trout, Oncorhynchus mykiss, (mass 0.6-10.9 grams) were used to examine the growth of juvenile […]
Blubber development in bottlenose dolphins (Tursiops truncatus)
STRUNTZ, D.J.; MCLELLAN, W.A.; GAY, D.M.; DILLAMAN, R.M.; PABST, D.A.: Blubber development in bottlenose dolphins (Tursiops truncatus) Blubber, the highly derived, lipid-rich, hypodermis of cetaceans, functions in thermoregulation, metabolic energy storage, buoyancy control, streamlining, and locomotion. It is comprised of adipocytes surrounded by a collagen and elastic fiber matrix. Our goal was to investigate the […]
Too good to be true Testing the relationship between muscle function and attachment site morphology
ZUMWALT, A.C.; LIEBERMAN, D.E.; RUFF, C.B.; Johns Hopkins University, Baltimore, MD; Harvard University, Cambridge, MA; Johns Hopkins University, Baltimore, MD: Too good to be true? Testing the relationship between muscle function and attachment site morphology Muscle attachment sites are bony features that may be indicative of in vivo muscular stresses. Many studies have used these […]
Predicting long bone loading from cross-sectional geometry
POLK, J.D.; LIEBERMAN, D.E.; DEMES, B.; Harvard University; Harvard University; Stony Brook University: Predicting long bone loading from cross-sectional geometry Long bone loading histories are commonly evaluated using midshaft cross-sectional properties. Functional inferences are made by assuming that long bones are deformed like long, straight beams in pure bending, with neutral axes that run through […]
Morphometrics and Biomechanics Functional Implications of Shape Change in the Labridae
FESSLER, J.L.*; WESTNEAT, M.W.; CHERNOFF, B.; Univ. of Illinois, Chicago; Field Museum; Field Museum: Morphometrics and Biomechanics: Functional Implications of Shape Change in the Labridae The Labridae is a large family of marine fishes (>600 sp.) that are diverse in trophic morphology, ecology, and prey capture biomechanics. Although the functional morphology of feeding in adult […]
Hydrostatic Skeletons in the Crustacea
TAYLOR, J.R.A.*; KIER, W.M.; University of North Carolina, Chapel Hill; University of North Carolina, Chapel Hill: Hydrostatic Skeletons in the Crustacea The crustacean molt cycle involves a short phase, ecdysis, in which the animal sheds its rigid exoskeleton and is left with a soft, flexible cuticle inflated with water. During the few days required for […]
Biomechanics and origins of shell coiling
DANIEL, T.L.; GLINOGA, G.P.; WARD, P.D.; Univ. Washington, Seattle; Univ. Washington, Seattle; Univ. Washington,Seattle: Biomechanics and origins of shell coiling Mechanisms driving the origin and early evolution of coiling in molluscan shells remain enigmatic. With the notion that shell form follows from an evolutionary arms race between mollucan prey and their predators, we asked whether […]
Anatomical construction of the horse’s hoof for weightbearing
THOMASON, JJ; MCCLINCHEY, HL; JOFRIET, JC; DICKEY, JP; RUNCIMAN, J; DOUGLAS, JE; Univ. of Guelph, Guelph; Univ. of Guelph, Guelph; Univ. of Guelph, Guelph; Univ. of Guelph, Guelph; Univ. of Guelph, Guelph; Equine Research Centre, Guelph: Anatomical construction of the horse’s hoof for weightbearing The horse�s hoof is constructed to withstand the shock of rapid […]