FEUERBACHER, ERICA N*; DICKINSON, MICHAEL H: Effects of ambient light level on free-flight behavior of Drosophila melanogaster. Natural populations of organisms experience several orders of magnitude differences in ambient light level through the course of the day. Both spatial and temporal visual resolution depend on light level, suggesting that light level and organisms? ability to […]

TAMMERO, Lance; DICKINSON, Michael: A characterization of the response to visually simulated object approach in Drosophila As a fly approaches an object, image expansion occurring across the fly’s retina and a fly is faced with the choice of either avoiding the object or landing on it. To quantify the dynamics of the fly’s response to […]

WANG, J.H*; CAIN, S.D.; LOHMANN, K.J.: The identification and characterization of magnetically sensitive neurons in Tritonia diomedea Numerous behavioral studies show that diverse organisms use the earth’s magnetic field for orientation and navigation. Despite over three decades of interest in this behavioral phenomenon, little is known about the neural mechanisms that underlie this ability. In […]

BOLES, L.C.*; LOHMANN, K.J.: The effects of attached magnets on the orientation of displaced spiny lobsters Many animals use the Earth�s magnetic field as a cue during orientation and navigation. However, relatively little is known about how these animals, particularly invertebrates, actually detect magnetic fields. Spiny lobsters, Panulirus argus have a magnetic compass sense and […]

CAIN, SD; BALTZLEY, MJ: The Distribution of Neurotransmitters Controlling the Foot Cilia of the Sea Slug Tritonia diomedea The nudibranch mollusc Tritonia diomedea, which is known to orient to water currents and the Earth’s magnetic field, primarily locomotes using ciliary action of cells that cover the surface of the foot. The activity of these cilia […]

WYETH, R.C.*; WILLOWS, A.O.D.: Field behavior of the nudibranch mollusc, Tritonia diomedea: a baseline for the neuroethology of orientation and navigation. Animals use a variety of senses to navigate through their environment. How do they integrate multiple senses to direct movement? The nudibranch Tritonia diomedea is an excellent candidate for investigating mechanisms of sensory integration […]

FARLEY, R.D.: Striking Developmental Changes in the First Molt of Newborn Scorpions The scanning electron microscope is used for the first time to compare structures in the first and second stadia. In the buthid Centruroides vittatus (Mexico, southern U.S.) and all other scorpions, the newborn climb up on their mother’s back and remain there without […]

STEWART, J.R.*; BRASCH, K.R.: Placental Ultrastructure of a Predominantly Lecithotrophic Squamate Reptile Virginia striatula is a viviparous snake with a complex pattern of embryonic nutrition. Nutrients for embryonic development are provided by large yolked eggs, supplemented by placental transfer. Placentation in this species is surprisingly elaborate for a predominantly lecithotrophic squamate reptile. The embryonic–maternal interface […]

SMITH, Kathleen K; VAGLIA, Janet: Early development of the cranial neural crest, neural tube and paraxial mesoderm in marsupials. Marsupial mammals are highly altricial at birth when compared to most other amniotes, yet the neonate must possess adaptations to allow it to independently travel to, identify and attach to the teat, suckle and process food […]

DICKINSON, A.J.G.*; CROLL, R.P.: Early Development and Cell Fate Specification of the Larval Nervous System and Musculature of the Prosobranch Mollusc Ilyanassa obsoleta Molluscs have served as important models for understanding early developmental cleavage programs. While the cell lineages of the prosobranch Ilyanassa obsoleta have been thoroughly investigated, the origins and mechanisms in which individual […]