Meeting Abstract 59.6 Jan. 7 Crocodylian Phylogeny & Cranial Ecomorphology SADLEIR, R.W.; Univ. of Chicago, Field Museum rsadleir@uchicago.edu Conflicting phylogenetic signals, character homoplasies, and character atavisms typify crocodylian phylogeny. Most phylogenetic ambiguity involves Gavialis and Tomistoma, for whom a secondary signal showing 70% of the characters supporting incongruent topologies is associated with their slender skull. Slender-snout skulls […]
year: 2007
Are radular tooth characters of the gastropod Conus informative for taxonomy and phylogeny
Meeting Abstract 59.1 Jan. 7 Are radular tooth characters of the gastropod Conus informative for taxonomy and phylogeny? KOHN, A.J.*; MEYER, C.P.; Univ. of Washington, Seattle; Univ. of California, Berkeley kohn@u.washington.edu Conus radular teeth are independently operating, hypodermic needle-like structures that inject paralytic neuropeptides to overcome prey. We tested the hypotheses that 1) they are sufficiently complex […]
A Systematic Revision of the Agriochoeridae (Cetartiodactyla Oreodontoidea)
Meeting Abstract 59.4 Jan. 7 A Systematic Revision of the Agriochoeridae (Cetartiodactyla: Oreodontoidea) LUDTKE, JA; San Diego State University joshualudtke@gmail.com Oreodonts, despite being a common component of Tertiary North American terrestrial faunas, lack a firm phylogenetic placement within Cetartiodactyla. Most workers agree that they are an early diverging`group, but disagreement exists as to whether oreodonts are more […]
Thermogenic capacity in wintering and migratory shorebirds is driven by body mass-related changes in organ size
Meeting Abstract 58.1 Jan. 6 Thermogenic capacity in wintering and migratory shorebirds is driven by body mass-related changes in organ size V�ZINA, F.*; JALVINGH, K.M.; DEKINGA, A.; PIERSMA, T.; NIOZ; NIOZ; NIOZ; NIOZ, University of Groningen fvezina@nioz.nl Cold acclimatization in birds involves an array of metabolic adjustments resulting in increased shivering endurance and improved cold tolerance. These […]
The influence of photoperiod on pulsatile urea excretion in the gulf toadfish Opsanus beta
Meeting Abstract 58.6 Jan. 6 The influence of photoperiod on pulsatile urea excretion in the gulf toadfish Opsanus beta WALSH, PJ*; BARIMO, JF; MCDONALD, MD; University of Ottawa; Portland State University; University of Miami pwalsh@uottawa.ca The gulf toadfish Opsanus beta (Batrachoididae) is one of the few teleosts to maintain a functional ornithine-urea cycle (O-UC) during adult life […]
Seasonal changes in the reproductive organs and body condition of northern redbacked voles (Clethrionomys rutilus) in coastal, southcentral Alaska
Meeting Abstract 58.5 Jan. 6 Seasonal changes in the reproductive organs and body condition of northern redbacked voles (Clethrionomys rutilus) in coastal, southcentral Alaska NAY, L.A.I.; STEVENSON, K.T.*; VAN TETS, I.G.; Kotzebue High School, Kotzebue, AK; University of Alaska Fairbanks/ University of Alaska Anchorage; University of Alaska Anchorage ftkts2@uaf.edu Arvicoline rodents (voles and lemmings) are small, non-hibernating […]
Lactating hares are limited by the capacity of the alimentary tract
Meeting Abstract 58.4 Jan. 6 Lactating hares are limited by the capacity of the alimentary tract VALENCAK, T.G.**; RUF, T.; Veterinary Univ. Vienna; Veterinary Univ. Vienna Teresa.valencak@vu-wien.ac.at Traditionally, animals were considered to be mainly limited by food availability in their environment. However, studies on mammals and birds over the past two decades have clearly demonstrated that, even […]
Differences in organ mass and hematology between male and female Spotted Salamanders (Ambystoma maculatum) during the reproductive season
Meeting Abstract 58.2 Jan. 6 Differences in organ mass and hematology between male and female Spotted Salamanders (Ambystoma maculatum) during the reproductive season. FINKLER, M.S.; Indiana Univ., Kokomo mfinkler@iuk.edu Spotted salamanders display pronounced sexual dimorphisms in body size, metabolism, migratory behavior, and whole-animal performance during the reproductive season. Here, I investigated potential differences in heart, liver, gonad, […]
Causal association between organ masses and aerobic metabolism in the diamondback water snake
Meeting Abstract 58.3 Jan. 6 Causal association between organ masses and aerobic metabolism in the diamondback water snake BOBACK, S.M.*; SECOR, S.M.; University of Alabama sboback@ua.edu Organ mass variation has been interpreted to be an underlying source of inter-individual variation in metabolic rate. We addressed this hypothesis by exploring the relationship between organ mass and aerobic metabolism […]
Patterns of fin ray curvature of Myoxocephalus octodecimspinosus, the longhorn sculpin during substrate-contact and swimming
Meeting Abstract 57.1 Jan. 6 Patterns of fin ray curvature of Myoxocephalus octodecimspinosus, the longhorn sculpin during substrate-contact and swimming TAFT, Natalia K.; University of Massachusetts Amherst natashak@bio.umass.edu The pectoral fins of benthic fished are used for substrate contact behaviors as well as during swimming. Morphological specializations of the fin rays are correlated with this functional flexibility […]
