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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 12 of 12 for “"sea star"”.
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MORPHOLOGICAL AND ISOZYMAL VARIATION IN THE SEA-STAR ASTERIAS FORBESI(DESOR)
<p>Kinetic studies of the hydrogenation of carbon monoxide to methane and methanol were carried out over iron-titanium alloy catalysts, in a continuous flow fixed bed differential reactor. The catalysts studied included FeTi, Fe(,1.5)Ti and Fe(,2.5)Ti alloys with pure Fe used as a comparison. The …
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Responses to salinity of color polymorphs in two populations of the sea star, Pisaster achraceus
… or location affect the physiology of these sea stars. The three responses analyzed were aerobic respiration, ammonia excretion, and self-righting. The tested variables included two different color morphs (orange and purple) of <em>P. ochraceus</em>, two different locations (open coast and …
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Sea Star Wasting Disease in Pisaster Ochraceus on the Washington Coast and in Puget Sound
… ochraceus </em>is a common west coast sea star whose predation of <em>Mytilus californianus </em>(the California mussel) increases the biodiversity of its intertidal community. Sea star wasting disease is an illness that causes sea star tissues to become necrotic until the creature …
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Gut Patterning In Development And Evolution: A Comparative Differential Transcriptomics Approach
… 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 sea star embryo, focusing …
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Comparative anatomy and biology of two species of the asteroid genus pisaster
… of the diversity of the spinous patterns of this sea star. Following the suggestion of Dr. Jool D. hedgepeth it was decided to make an extensive comparison of the common species of Pisaster.</p><p>Detailed comparison between Pisaster brevispinus and Pisaster ochraceus have been made only by Fisher …
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Purification and characterization of an insulin-stimulated kinase
… amyelin basic protein-kinase (MBP-kinase) from sea-star is able to phosphorylate the insulin-directed site on ACC. Thus, it was interesting to find out whether a mammalian homolog of this kinase existed. Rapid chromatography of supernatant fractions from rat adipose tissue by MonoQ ion exchange …
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Ingestion Rates of Five Species of Pacific Northwest Echinoderm Larvae on Natural and Artificial Particles
… 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 artificial diet …
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Mechanochemical pattern formation in the cellular actomyosin cortex
… in the actomyosin cortex of Patiria miniata sea star oocytes. This is an ideal biological model system for exploring the interactions between biochemical patterning and mechanical deformations in evolving mechanochemical systems in vivo due to their experimental accessibility and wealth of …
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Resolution of the Marthasterias Taxonomic "Disar-star"
Marthasterias glacialis is a sea-star found in the cool-temperate waters of the north-eastern Atlantic as well as along the south-western tip of Africa. The South African Marthasterias population is comprised of two distinct morphotypes, a smooth, spineless rarispina form and a spiny africana form. …
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The maintenance, evolution, and impacts of inducible morphological defenses in Mytilus edulis: Responses to multiple and invasive predators
… thicker shells in response to Carcinus, the seastar Asterias, and the whelk Nucella, and heavier adductor muscles in response to cues from Nucella and Asterias. These induced defenses subsequently protected mussels from Carcinus, but only Asterias exposed mussel were defended from Asterias. …
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Assessment and management of the abalone (haliotis mariae, Wood 1828) stock in the Omani waters
… biology including growth, reproduction, spawning season, sex distribution, maturity stages and size at first maturity.The fishery is restricted to the southern coastline, which is strongly influenced by the monsoon winds, which result in major changes in the environmental conditions and the …
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Population Genomics, Ecology and Conservation of <i>Asterias</i> Sea Stars in the North Atlantic
… assemblage in which they reside (Paine 1966). Sea stars are known to be keystone species in the intertidal community (Paine 1966; Hart 2010; Menge & Sanford 2013), and are therefore of great interest to ecologists and conservation biologists hoping to predict and mitigate impending biodiversity …