Meeting Abstract 25.9  Monday, Jan. 5  Unreliable signals of strength in male slender crayfish (Cherax dispar): costs of enlarged claws and the importance of resources during disputes WILSON, R S*; OLIVER, J; GOLDIZEN, A; BLOMBERG, S; Univ, of Queensland; Univ. of Queensland; Univ. of Queensland; Univ. of Queensland r.wilson@uq.edu.au Unreliable signals of weapon strength are considered problematic […]

Meeting Abstract 25.10  Monday, Jan. 5  The optics and evolution of scallop eyes SPEISER, D.I.*; JOHNSEN, S.; Duke Univ.; Duke Univ. dis4@duke.edu Scallops can possess upwards of one hundred eyes along their valve margins. These eyes contain two distinct retinas and form images by the reflection of light off a concave spherical mirror. It is thought that […]

Meeting Abstract 25.7  Monday, Jan. 5  Stable isotope analysis: a quantitative approach to linking diet and morphological specialization in mantis shrimp DEVRIES, M.S.; Univ. of California, Berkeley msdevries@berkeley.edu Many animals have specialized feeding structures used to consume specific prey types. Mantis shrimp provide an excellent system to study the relationship between morphological and diet specialization, because their […]

Meeting Abstract 25.2  Monday, Jan. 5  Resonant Feathers Enable Sound Production in Machaeropterus deliciosus (Aves) BOSTWICK, Kimberly/S*; ELIAS, Damian; MASON, Andrew; MONTEALEGRE-Z, Fernando; Cornell University; University of British Columbia; University of Toronto Scarborough; University of Bristol ksb6@cornell.edu Male Club-winged manakins produce a unique, sustained, tonal sonation while perched during courtship. The sound is hypothesized to result from […]

Meeting Abstract 25.8  Monday, Jan. 5  Geographic variation in weapon size, strength and colouration among populations of the two-toned fiddler crab (Uca vomeris). BYWATER, CL*; WHITE, C; WILSON, RS; University of Queensland; University of Queensland; University of Queensland c.bywater@uq.edu.au Males of many species possess specialized weapons that are often displayed to resolve territorial disputes without direct physical […]

Meeting Abstract 25.1  Monday, Jan. 5  Evolution of Avian Compound Rhamphothecae: Homology of Simple and Compound Horny Beaks in Birds HIERONYMUS, T.L.*; WITMER, L.M.; Ohio University Department of Biological Science; Ohio University College of Osteopathic Medicine th108702@ohiou.edu The topology of separate elements in avian compound rhamphothecae is strongly similar within different clades, not only in external appearance […]

Meeting Abstract 25.6  Monday, Jan. 5  Divergent head shape variation in European eel: how well does skeletal morphology reflect functional demands? IDE, Celine*; DE SCHEPPER, Natalie; DUMONT, Betsy; HERREL, Anthony; ADRIAENS, Dominique; Ghent University celine.ide@ugent.be The existence of naturally occurring narrow- and broad-headed individuals within the European eel (Anguilla anguilla) populations is since long known. Previous studies […]

Meeting Abstract 25.5  Monday, Jan. 5  Constructional Constraints In Sphyrnid Sharks: Shape Change And Space Utilization Through Phylogeny. MARA, Kyle R.*; MOTTA, Philip J.; PFEIFFENBERGER, Janne A.; University of South Florida, Tampa; University of South Florida, Tampa; University of South Florida, Tampa kmara@mail.usf.edu Constructional constraints are particularly important within spatially limited structures such as the head. The […]

Meeting Abstract 25.4  Monday, Jan. 5  Asymmetry in the human cranio-cervico-omo-clavicular complex suggests connection with bipedalism OSBORN, M.L.*; HOMBERGER, D.G.; Louisana State Univ., Baton Rouge; Louisana State Univ., Baton Rouge mosbor1@lsu.edu The mastoid process and clavicle are larger in humans than in other mammals and have been interpreted as having evolved in connection with upright posture and […]

Meeting Abstract 25.11  Monday, Jan. 5  A heat-conserving ventilator for buildings based on nasal countercurrent exchangers VOGEL, S.; Duke University svogel@duke.edu Respiratory ventilation in warm-blooded animals causes loss of both heat and water. Small mammals and birds commonly minimize such losses cyclic storage and release of heat plus condensation and evaporation of moisture during exhalation and inhalation […]