GIBB, AC; O’NEILL, MW; KRAUS, NJ; Northern Arizona University; NAU; St. Norberts College: Chemical denervation: Using botulinum toxin to test functional hypotheses in teleost fishes Techniques currently used for testing hypotheses in functional morphology, such as transecting nerves, tendons or ligaments, are highly invasive and may cause unintended structural damage, thereby yielding misleading functional results. […]
year: 2005
Resource defense and juvenile hormone The challenge hypothesis extended to insects
SCOTT, M.P.; University of New Hampshire: Resource defense and juvenile hormone: The challenge hypothesis extended to insects As predicted for vertebrates by the challenge hypothesis, the endocrine system of invertebrates can respond to social stimuli to modulate aggression. Vertebrate aggression is promoted by testosterone; juvenile hormone (JH) serves an analogous function in burying beetles. Hemolymph […]
Maternal condition, yolk corticosterone and sex-specific modulation of offspring phenotype experimental studies in a wild bird
LOVE, OP*; WYNNE-EDWARDS , KE; WILLIAMS, TD; Simon Fraser University; Queen\\\’s University; Simon Fraser University: Maternal condition, yolk corticosterone and sex-specific modulation of offspring phenotype: experimental studies in a wild bird �Maternal effects� translate environmental conditions experienced by parents to offspring and can directly influence offspring phenotype. In particular, maternal condition at the time of […]
Females Deposit More Yolk Androgens Into Eggs Sired By Less Attractive Males A Contradiction To The Differential Allocation Hypothesis
NAVARA, KJ; HILL, GE; MENDON�A, MT; Auburn University, Auburn, AL: Females Deposit More Yolk Androgens Into Eggs Sired By Less Attractive Males: A Contradiction To The Differential Allocation Hypothesis? Female birds have been found to allocate androgens differentially within and among clutches, and it has been suggested that this is a strategy employed by those […]
Ecological Patterns and Phenotypic Plasticity in the Temperature Set-Points of the Heat-Shock Response
BARUA, D*; HECKATHORN, SA; Univ. of Toledo: Ecological Patterns and Phenotypic Plasticity in the Temperature Set-Points of the Heat-Shock Response The evolutionarily conserved and ubiquitous heat-shock response (HSR) protects cellular components from damage. Analyzing results from diverse organisms, with growth temperatures spanning the range of temperatures known to sustain life, we show strong positive linear […]
Does Female Reproductive Investment Constrain Growth and Promote Male-Larger Sexual Size Dimorphism in Yarrows Spiny Lizard, Sceloporus jarrovii
COX, R. M.*; JOHN-ALDER, H. B.; Rutgers University; Rutgers University: Does Female Reproductive Investment Constrain Growth and Promote Male-Larger Sexual Size Dimorphism in Yarrow�s Spiny Lizard, Sceloporus jarrovii? Energetic trade-offs between reproduction and growth are central assumptions of life-history theory, but the implications of such trade-offs for sexual size dimorphism (SSD) are largely unexplored. We […]
Comparing nonlinear patterns in development using information theory growth in American coots and metabolism in Canada geese
CLARK, M. E.*; REED, W. L.; BOONSTRA, T. ; North Dakota State University; North Dakota State University; North Dakota State University: Comparing nonlinear patterns in development using information theory: growth in American coots and metabolism in Canada geese. Many biological processes exhibit highly nonlinear patterns that are difficult to compare using conventional statistical methods. Sigmoidal […]
The role of COE genes in the evolution of the metazoan nervous system
MATUS, D.Q.; LEE, P.N.; BROWNE, W.E.; MARTINDALE, M.Q.; University of Hawaii / Kewalo Marine Laboratory; University of Hawaii / Kewalo Marine Laboratory; University of Hawaii / Kewalo Marine Laboratory; University of Hawaii / Kewalo Marine Laboratory: The role of COE genes in the evolution of the metazoan nervous system We are interested in the evolution […]
The evolution of insect engrailed genes, and its implications for our understanding of gene family evolution
PEEL, A.D.; AKAM, M.E.; University of Cambridge, U.K.; University of Cambridge, U.K.: The evolution of insect engrailed genes, and its implications for our understanding of gene family evolution. A number of insect orders, including Diptera, Lepidoptera & Blattodea, have been shown to contain species that possess two engrailed genes. Conspecific engrailed genes typically group together […]
Knock-down of Hox3zerknllt in a representative insect results in complete eversion of the embryo Evolution of embryogenesis and of gene function
PANFILIO, K.A.; LIU, P.Z.; KAUFMAN, T.C.; University of Cambridge, UK; Indiana University, Bloomington; Indiana University, Bloomington: Knock-down of Hox3/zerkn�llt in a representative insect results in complete eversion of the embryo: Evolution of embryogenesis and of gene function The Hox3 locus in insects has diverged significantly from the canonical role of Hox genes in segmental specification […]
