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- Gale, Endocrine, CSA, Aaas, Nephrology, Proquest, Csh, Aacr, Ama, Highwire, Rupress, and Jstor
Photoreception and signal transduction in corals: proteomic and behavioral evidence for cytoplasmic calcium as a mediator of light responsiv...
Little is known about how corals sense and respond to light. In this report the proteome of coral is explored using 2D protein electrophoresis in two species, Montastraea cavernosa and Acropora millepora. Multiple protein species have major shifts in abundance in both species when sampled in dayligh...
Anesthetizing solar-powered sea slugs for photobiological studies.
We evaluated the effect of two anesthetics, eugenol and MS-222, on the photosynthetic activity of kleptoplasts and on the behavior of the kleptoplasts-bearing slug Elysia viridis. Anesthetics promoted relaxation of sea slug muscle with no touch reaction in about 6 min. Sea slugs immobilized for 120...
Comparative photobehavior of marine cercariae with differing secondary host preferences.
We studied light as an initiating and orienting cue for swimming in two species of marine cercariae (Trematoda), Euhaplorchis sp. and Probolocoryphe lanceolata, which initially parasitize the same species of benthic snail, but then utilize different second intermediate hosts located in pelagic and b...
Growing pains: development of the larval nocifensive response in Drosophila.
We characterize the nocifensive responses of Drosophila throughout larval development and find dramatic changes in the nature of the behavior. Notably, we find that prior to the third instar, larvae are unable to perform the characteristic "corkscrew-like roll" behavior. Also, we identify an avoidan...
Effects of temperature on hatching time and hatchling proportions in a poecilogonous population of Haminoea zelandiae.
Poecilogony is a relatively uncommon life-history strategy that results in the production of two different larval forms from the same egg mass (e.g., free-swimming lecithotrophic larvae and post-metamorphic, crawling juveniles). In this study, a population of the opisthobranch gastro...
Sperm chemotaxis as revealed with live and synthetic eggs.
We describe can be used to create synthetic eggs for most animal and plant species, including humans. Egg mimics increase the capacity for experimental manipulation and enable realistic studies of sperm behavior even in the absence of female gametes....
Differential fertilization success between two populations of eastern oyster, Crassostrea virginica.
Identification of mechanisms promoting prezygotic reproductive isolation and their prevalence are key goals in evolutionary biology because of their potential role in speciation. In marine broadcast-spawning species, molecular interactions between gamete surface proteins are more important than mati...
Abrupt change in food environment induces cloning in plutei of Dendraster excentricus.
We examine the effects of algal food density and of a change in food density on the incidence of cloning in larvae of the sand dollar Dendraster excentricus. Results indicate that a change in food concentration can induce cloning in plutei. Cultures transferred from a low to a high algal ration at t...
Effects of estradiol and progesterone on the reproduction of the freshwater crayfish Cherax albidus.
We have investigated the role of 17beta-estradiol and progesterone in the reproduction of the crayfish Cherax albidus by using vitellogenin (VTG) as a biomarker. Early-vitellogenic (EV), full-vitellogenic (FV), and non-vitellogenic (NV) females of Cherax albidus were treated with 17beta-estradiol, p...
Methods for karyotyping and for localization of developmentally relevant genes on the chromosomes of the purple sea urchin, Strongylocentrot...
We describe the first successful methods for karyotyping and localizing specific gene loci on chromosomes of Strongylocentrotus purpuratus and those of the phylogenetically related Strongylocentrotus droebachiensis. Both species have 42 chromosomes in their diploid genomes (n = 21). There are 2 larg...