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Showing 1 to 16 of 16 for “"Feeding experiment"”.
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Studies on secondary metabolites produced by actinomycetes and cyanobacteria
… as well as acetate and methionine. A separate feeding experiment with (2-$\sp{13}$C) pyruvate suggested that the methylaspartate (MeAsp) unit could be derived from pyruvate and acetate.
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Carry-Over Effects in Complex Life Cycles: Linking Larval Food Supply with Juvenile Recruitment Success in Sea Stars
… sea star was reared for 2-3 weeks on a juvenile feeding treatment of unfed, 1 juvenile mussel week-1, 3 juvenile mussels week-1, or 6 juvenile mussels week-1. My main response variables for the juvenile feeding experiment were mussel mass consumed and juvenile growth rate. I predicted that …
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Effects of temperature and food availability on the reproductive ecology of an arid-zone bird
… monitoring breeding, conducting a supplementary feeding experiment (providing breeding pairs with access to either a high supplementation (high supp.) treatment of ~25g of Zophobas morio or a low supplementation (low supp.) treatment of ~5g of Z. morio every day of the breeding attempt), and …
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A comparison of the influence of barn-cured and field-cured alfalfa hay on milk production
A controlled feeding experiment was conducted to compare the influence of barn-cured and field-cured alfalfa hay out from the same field on milk production and liveweight of dairy cows. Twelve Holstein cows were used in this trial. The double-reversal feeding method was followed. Grain was fed at …
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Quantification and characterisation of nutrients in Senegalia Mellifera milled biomas, feed intake and nitrogen balance in female boer goats fed with Senegalia Melifera bush-based feeds
… were added at a level of 5 g per day during feeding time. Eight (8) female Boer goats, with an average initial body mass of 31.5 kg (± 2.5 kg), were used in the feeding experiment. The goats were penned individually in metabolic cages measuring 120 cm long, 54 cm wide and 90 cm above the …
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A ¹⁵N study of the effects of nitrate, ammonium and nitrate plus ammonium nutrition on nitrogen assimilation in Hordeum vulgare
… eight hours after the commencement of the ¹⁵N feeding experiment and prepared for analysis. Xylem sap was also collected for a period of one hour beginning half an hour before each harvest and continuing for half an hour after harvesting. Separate batches of plants were used for harvesting and …
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The Effects of Forebrain Ablations on Some Behaviors in <i>Xenopus Laevis</i>
… <p>3. Escape from shallow water</p> <p>4. Feeding behavior</p> <p>In the habituation experiment no changes were found in the number of responses oer session, the strength of the .responses or in the strength of the initial responses. Certain telencephalon-ablated individuals, however, …
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Chemical Evidence for Dietary Toxin Sequestration in the Asian Snake <i>Rhabdophis tigrinus</i>
… be chemical selectivity to this process. In a feeding experiment with gravid <em>R. tigrinus</em> from various localities, most clutches had been provisioned with moderate to large quantities of bufadienolides. In the provisioned clutches, the most abundant bufadienolide in the unfed hatchlings …
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Predicting Insect Herbivore Distribution Using Climatic and Biotic Variables
… two field observational and two laboratory experimental studies to better understand factors and mechanisms affecting insect herbivore distribution in nature. I examined 1) the climatic and biotic factors influencing the spatial and temporal variation in the density of a dominant salt marsh …
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Tracing the effects of diets in freshwater fish using fatty acid profiles
… over many months. Through the use of controlled feeding experiments, this dissertation explores the efficacy of using fatty acid profiles to both describe and quantify the composition of diets of salmonid species. Much of the work conducted exploring fatty acids in reference to a diet have used …
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Functional connectivity of coral reef fishes in a tropical seascape assessed by compound-specific stable isotope analyses
… (AA) δ13C analysis in otoliths. In a controlled feeding experiment with fish reared on isotopically distinct diets, we showed that essential AAs exhibited minimal trophic fractionation between consumer and diet, providing a δ13C record of the baseline isoscape. We explored the potential for …
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Functional connectivity of coral reef fishes in a tropical seascape assessed by compound-specific stable isotope analyses
… (AA) 13C analysis in otoliths. In a controlled feeding experiment with fish reared on isotopically distinct diets, we showed that essential AAs exhibited minimal trophic fractionation between consumer and diet, providing a 513C record of the baseline isoscape. We explored the potential for …
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Nutrient uptake and exudation patterns of nitrogenous substances and polyphenols in the kelp Ecklonia Maxima (Osbeck) Papenfuss
… kelp Ecklonia maxima (Phaeophyceae) in ex-situ experiments. It was found that exudation of organic materials only rarely followed a straight accumulatory trend ; fluctuations of kelp-derived substances occurred as a net result of pulsating production patterns coupled with differential rates of …
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The effect of supplementary nectar feeders on bird-plant mutualisms in the Cape Fynbos, South Africa
… Cape Peninsula, South Africa. I carried out a feeding experiment with a matched paired design to answer two main questions: (1) Do nectar feeders affect bird abundance and distribution ranges? If so, (2) do these affect their visitation rates to bird-pollinated plants? I conducted bird surveys …
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Isolierung, Strukturaufklärung und Totalsynthese von Naturstoffen aus tropischen Heilpflanzen und Bodenorganismen
… Nepenthis insignis DANSER. Bei Verfütterungsexperimenten wurde (L)-[13C3,15N]-Alanin in die Kannen von sterilen Pflanzen eingebracht und ein Einbau in Plumbagin beobachtet. Die Pflanze verstoffwechselt die Aminosäuren auf den üblichen Abbauwegen und erlaubt so die Verfütterung von Alanin als …
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Impacts of nanoparticles to microbes and invertebrates: from community responses to cellular targets
… that prefers high quality stream water. The feeding behaviour and growth of the invertebrate were affected in a dose-dependent manner. Effects were due to both nanoCuO and ionic copper leached from nanoCuO that adsorbed or accumulated in the shredder body. The feeding behaviour of the …