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 7 of 7 for “"Ammonia excretion"”.
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Responses to salinity of color polymorphs in two populations of the sea star, Pisaster achraceus
… 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 inland straits) in Washington State, and three salinities (22, 30, …
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An energy budget for the South African abalone Haliotis Midae
… efficiency, respiration rate and rate of ammonia excretion, each of which were measured as functions of wet body mass. Each aspect was studied using animals from two sites subject to different temperature regimes. One of these was on the western Cape coast, off Marcus Island (at 14° C) and …
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Benz(a)anthracene in benthic marine environments : bioavailability, metabolism, and physiological effects on the polychaete Neries virens
… was also measured. Growth, oxygen consumption, ammonia excretion, adenylate nucleotide pools, and mixed function oxygenase activity of the worms were also monitored. The presence of worms and the mode of introduction had significant effects on the fate of BA in this system. In experiments with …
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Excretory nitrogen metabolism in the Chinese soft-shelled turtle, pelodiscus sinensis
… feeding, salinity stress, emersion and acute ammonia toxicity, on nitrogen metabolism and excretion in the Chinese soft-shelled turtle Pelodiscus sinensis. Pelodiscus sinensis is ureogenic and primarily ureotelic in freshwater. Our results reveal that a major portion of the urea was excreted …
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Nutritional ecology of Agalma okeni and other siphonophores from the epipelagic western North Atlantic Ocean
… 3°C ranged from 2 - 86 μ1 02/mg protein-hr, and ammonia excretion ranged from 0.1 - 3.3 μg NH4/mg protein-hr. The cystonects Rhizophysa filiformis and Bathyphysa sibogae had low rates of respiration and excretion, while calycophores of the genus Sulculeolaria had the highest rates. For most …
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Rh Glycoprotein as an Ammonia Transport Molecule
Fish use their gills to excrete ammonia in order to eliminate nitrogenous waste. We hypothesize that this mechanism is accomplished by one or more transport proteins in the Rh glycoprotein (RhxG) family. Longhorn sculpin (Myoxocephalus octodecemspinosus) cDNA was amplified using polymerase chain …
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Comparative ecology and physiology of four South African mussel species with notes on culture potential
… compares rates of filtration, respiration and ammonia excretion, as well as absorption efficiencies and subsequent scope for growth in the four mussel species. All species maintain a relatively steady scope for growth over the ration levels 1-7 mg 1- . However, rates are the highest in M. …