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 8 of 8 for “"Host age"”.
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Human antibody-mediated immunity against infection and parasite fecundity in Schistosoma mansoni and Schistosoma haematobium infection
… using a mathematical modelling approach. Age intensity and serology profiles of sub-cohorts were reproduced to good approximation by incorporating explicitly defined exposure and immunity functions, fitted to field data, into an age- and sex-structured S. mansoni transmission model. …
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Individual, Social, and Environmental Factors Associated with Patterns of Parasitic Infection in Capuchin Monkeys (Cebus imitator)
… parasites are acquired and transmitted by their hosts in wild, natural populations is integral to understanding how similar processes may have shaped host-parasite co-evolutionary relationships over time. However, parasitological studies in humans and in non-human primates have produced …
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Spatial variability in modern brachiopod assemblages: paleoecological and geochemical implications
… serve as analogues for ancient brachiopod assemblages. The paleoclimatic utility of delta18O in the phosphatic phase of lingulid brachiopod shells requires valve secretion in equilibrium with seawater, an assumption tested (and rejected) when analyzed at scales ranging from millimeters to …
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The causes and consequences of variation in the cloacal microbiome of tree swallows (Tachycineta bicolor)
Animals are ecological landscapes that host communities of microbes often referred to as microbiomes. These microbes can be transferred between individuals when they come into contact, such as during mating. Microbes that reside in or on any aspect of a host that becomes exposed to the reproductive …
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Annual cycle and morphology of lice parasitizing two sympatric African small mammals (Micaelamys namaquensis and Elephantulus myurus)
Host-parasite relationships are complex because hosts use certain mechanisms (grooming, immune response) to get rid of the parasites while parasites try to evade these mechanisms. At the same time, these mechanisms are energetically costly to the host and can lead to poor body condition which in …
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Intestinal helminth infections, distributions, and associations with health parameters of spring-migrating female Lesser Scaup in the upper Midwest
… million set by the North American Waterfowl Management Plan. Although many factors have been identified as possible contributors to the decline, the Spring Condition Hypothesis proposes reduced recruitment resulting from females in reduced condition as the most influential cause. Since 2002, …