Sexually dimorphic distribution of opsins in the Lycaena rubidus retina

SISON-MANGUS, Marilou P.; BRISCOE, Adriana D.; University of California, Irvine: Sexually dimorphic distribution of opsins in the Lycaena rubidus retina The distribution of visual pigments in Lycaena rubidus is reported to be sexually dimorphic on the basis of microspectrophotometric measurements (Bernard and Remington 1991). The dorsal region of the male L. rubidus is described to […]

Olfaction in sphyrnid sharks

KAJIURA, stephen m; TRICAS, timothy c; FORNI, jesica b; SUMMERS, adam p; florida atlantic university; university of hawaii at manoa; university of california, irvine; university of california, irvine: Olfaction in sphyrnid sharks Hammerhead sharks (Family Sphyrnidae) are characterized by a unique head morphology in which the olfactory capsules of the cartilaginous neurocranium are laterally expanded. […]

Interspecific differences in Aethia auklet odorants and evidence for chemical signaling and chemical defense

DOUGLAS III, H.D.; Univ. of Alaska Fairbanks: Interspecific differences in Aethia auklet odorants and evidence for chemical signaling and chemical defense Crested and whiskered auklets are closely related plankton-feeding seabirds of the North Pacific. Both species produce volatile citrus-like odorants. I show that the odorants differ in chemical composition. I suggest that these odorants could […]

Ecological requirements determine the expression of a phenotypically plastic color vision trait in three species of Caribbean mantis shrimp within the genus Neogonodactylus (Stomatopoda, Gonodactyloidea)

CHEROSKE, AG; BARBER, PH; CRONIN, TW; Moorpark College; Boston University; Univ. of Maryland, Baltimore County: Ecological requirements determine the expression of a phenotypically plastic color vision trait in three species of Caribbean mantis shrimp within the genus Neogonodactylus (Stomatopoda, Gonodactyloidea). Stomatopods are marine crustaceans that have some of the most intricate color vision systems known. […]

Development of the Weberian apparatus

BIRD, NC; HERNANDEZ, LP; George Washington University; George Washington University: Development of the Weberian apparatus The Weberian apparatus is a novel structure providing a direct route of sound and pressure transmission from the swimbladder to the inner ear via drastic morphological modifications to the anterior four vertebrae. Such modifications include changes in the shape of […]

Why are some genitalia asymmetrical

POLIHRONAKIS, Maxi; University of Connecticut: Why are some genitalia asymmetrical? The fraterna species complex (Coleoptera: Scarabaeidae: Phyllophaga) is currently comprised of approximately 30 taxa with distinct asymmetrical male genitalia as well as species-specific female genitalia. The most striking asymmetry arises between the two parameres located on the posterior portion of the male genitalic capsule. It […]

Why are developmental constraints constraints

AMUNDSON, R; Univ of Hawaii at Hilo: Why are developmental constraints “constraints”? The study of developmental constraints is one of the enduring factors within the late twentieth century research traditions that grew into evo-devo. Developmental constraint has been fruitfully applied in a wide variety of contexts. For many years, an evolutionist�s position on the �adaptation […]

Embedded Molecular Switches, Anti-Cancer Selection, and Effects on Ontogenetic Rates A Hypothesis of Developmental Constraint on Morphogenesis and Evolution

KAVANAGH, K.D.*; Harvard University and Univ. of Helsinki, Finland: Embedded Molecular Switches, Anti-Cancer Selection, and Effects on Ontogenetic Rates: A Hypothesis of Developmental Constraint on Morphogenesis and Evolution The switch between the cell cycle and the progress of differentiation in developmental pathways is prevalent throughout the eukaryotes in all major cell lineages. Disruptions to the […]

Donald Poulson and the Consolidation of Drosophila Developmental Genetics

CROSBY, Kevin C.; BURIAN, Richard M.; WOJCIK, Edward J.; Virginia Polytechnic Institute and State University; Virginia Polytechnic Institute and State University; Virginia Polytechnic Institute and State University: Donald Poulson and the Consolidation of Drosophila Developmental Genetics We examine Donald Poulson�s work on the genetics of early development of Drosophila in the 1930s-1950s. This work, not […]

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