Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 21 for “"Echinoderm"”.
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The behavior of planktotrophic echinoderm larvae;: mechanisms, regulation, and rates of suspension feeding
Thesis (Ph. D.)--University of Washington.
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Ingestion Rates of Five Species of Pacific Northwest Echinoderm Larvae on Natural and Artificial Particles
Ingestion rates for five species of echinoderm larvae, the sea stars Dermasterias imbricata, Pisaster ochraceus, and Evasterias troschelii, the sea urchin Strongylocentrotus purpuratus, and the sand dollar Dendraster excentricus, were investigated by assigning larvae to three natural and one …
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Paleoecology and Systematics of the Echinoderm Faunas of the Middle-Ordovician Platteville and Lower-Galena Groups of North-Central Illinois and South-Central Wisconsin
Made available in DSpace on 2014-12-11T18:10:06Z (GMT). No. of bitstreams: 1 7412074.pdf: 8939592 bytes, checksum: f091b514718b3cf29bd4cee19a1224ff (MD5) Previous issue date: 1973
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Taphonomy, palaeoecology and taxonomy of an ophiuroid-stylophoran obrution deposit from the Lower Devonian Bokkeveld Group, South Africa
… and faunal counts, without damaging the delicate echinoderm fossils. Furthermore, the ability to digitally analyse the fossil-rich bed has revealed an echinoderm assemblage composed of over 700 articulated ophiuroids dominated by a proposed new genus and species Gamiroaster tempestatis, over 145 …
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Sequence Stratigraphy of Middle-Mississippian Carbonates of the Southern Appalachians: Tuscumbia Limestone, Tuscumbia, AL
… facies and one subfacies were identified: F1: echinoderm, bryozoan mudstone/wackestone facies and Fla: muddy echinoderm chert, F2: echinoderm, bryozoan packstone/grainstone facies, F3: echinoderm, spicule cherty mud facies, and F4: fine-grained quartz sandstone facies. Fland Fla are interpreted …
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Gut Patterning In Development And Evolution: A Comparative Differential Transcriptomics Approach
… the GRN for embryonic gut specification in two echinoderm species, the sea urchin Strongylocentrotus purpuratus and the sea star Patiria miniata, has been studied with the purpose of acquiring further knowledge on the process of gut patterning in the sea urchin larva and to compare it with the …
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A revision of helicoplacoids and other early Cambrian echinoderms of North America
… contain the remains of several species of echinoderms, including helicoplacoids, the eocrinoids Gogia, Lepidocystis, and Kinzercystis, and the edrioasteroids Camptostroma and Stromatocystites. Camptostroma roddyi Ruedemann, 1933 is a large echinoderm from the Lower Cambrian Kinzers …
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Depositional history and diagenesis of the upper Mission Canyon and lower Charles Formations (Mississippian), Billings County, North Dakota
… in the identification of seven lithotypes: echinoderm wackestone-packstone, dolomudstone, dolomitic echinoderm wackestone, grainstone, skeletalpeloidal carbonate, laminated carbonate, and anhydrite. The stratigraphic distribution of lithotypes is consistent throughout the study area. …
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The geology and hydrocarbon potential of the Dawson Bay Formation carbonate unit (Middle Devonian), Williston Basin, North Dakota
… lithofacies are: lithofacies B (brachiopod-echinoderm wackestones and mudstones), lithofacies C (stromatoporoid boundstones, wackestones, and mudstones), lithofacies D (gastropod-ostracod-brachiopod-echinoderm wackestones and mudstones), and lithofacies F (cryptalgal boundstone and …
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High-Resolution Sequence Stratigraphy of Paleogene, Nontropical Mixed Carbonate/Siliciclastic Shelf Sediments, North Carolina Coastal Plain, U. S. A.
… shoreface and shallow shelf); bryozoan and echinoderm grainstones/packstones (storm reworked middle shelf); and fine skeletal wackestones and planktonic marls (slightly storm-winnowed to sub-wave base, deeper shelf). Paleogene deposition on this high-energy, open-shelf was characterized by a …
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Depositional environments and diagenesis of the Ratcliffe interval, Madison group (Mississippian), Williston Basin, North Dakota
… of six major facies: 1) brachiopod-bryozoan-echinoderm wackestone/packstone, 2) peloid packstone/wackestone, 3) oolite-peloid packstone, 4) laminated mudstone, 5) quartz siltstone packstone, and 6) anhydrite-dolomite mudstone. These facies were deposited in a regressive setting.</p> <p>The …
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Paleozoology of cores from the Tyler Formation (Pennsylvanian) in North Dakota, U.S.A.
… 2 ostracodes, 2 malacostracans, 1 insect, and 1 echinoderm. Chordates include 1 "nonmarine" shark, at least 1 paleoniscoid fish, and 1 possible crossopterygian fish. A new genus and species of eocarid malacostracan is described and represents the first report of the family Tealliocarididae from. …
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Reproductive success in Antarctic marine invertebrates
… members of the Antarctic benthos. Three common echinoderms and one nemertean were sampled from sites adjacent to the British Antarctic Survey’s Rothera Research Station, Adelaide Island, on the West Antarctic Peninsula between 1997-2001. Reproductive patterns were determined by histological …
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The sedimentology of the cambrian clastic sediments of Northwest Scotland
… rippled tempestites interbedded with fairweather echinoderm grainstones. The Salterella Grit is a 0-15m thick coarsening upwards sequence of muds and quartzarenites interpreted as having been deposited as tidal sandridges which went through active and moribund stages of development before being …
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Diagenesis and porosity development of the Mission Canyon and Charles Formations (Mississippian), Treetop and Whiskey Joe Fields, North Dakota
… the separation of rocks into six lithotypes: 1) echinoderm wackestone, 2) dolomudstone, 3) neomorphic wackestone, 4) intraclast bioclast wackestone packstone, 5) laminated mudstone, and 6) anhydrite which represent sublittoral, littoral, and supralittoral depositional environments. </p><p> …
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CHARACTERIZATION OF THE EUKARYOTIC TRANSLATION INITIATION FACTOR 4E (eIF4E) FAMILY MEMBERS IN THE ZEBRAFISH (Danio rerio)
… genomes currently available, as well as those of echinoderm, tunicate and cephalocordate, has allowed a glimpse of the origins and evolution of the eIF4E family in vertebrates. All deuterostomes have one representative from each class of eIF4Es. Early deuterostomes such as sea urchins, tunicates, …
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Towards Deep-Sea Toxicology: Experimental Approaches With Echinoderms
… to<br/>contamination and disturbance. Echinoderms are integral components of deep-sea benthic<br/>communities and, by virtue of their abundance, they contribute significantly to deep-sea<br/>biogeochemical processes. As such, echinoderms can be considered relevant target organisms …
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Mechanical Design of Selected Natural Ceramic Cellular Solids
… capability. Even though the skeleton of echinoderm is made up of single-crystal calcite, the structure fractures in a conchoidal manner rather than along the clipping plane, which can continuously fracture the fragments into small pieces and enhance energy dissipation.
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Post-larval development in deep-sea echinoderms
… ontogenesis of thirty species of deep-sea echinoderms, belonging to three classes (Ophiuroidea, Asteroidea and Echinoidea), is described using scanning electron microscopy. The life history of Ophiocten gracilis is also examined as a case study for future research on post-larval organisms. …
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Multiscale Structures and Mechanics of Biomineralized Lattices in Hexactinellid sponges and Echinoderms
… marine animals (i.e., Hexactinellid sponges and Echinoderms) for systematic structural-mechanical study. Their biomineralized lattice skeletons exhibit three representative types of multiscale structures: 1) multiscale hierarchical structure: skeleton of Hexactinellid sponge such as Euplectella …
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