3,852 research outputs found
Impacts of nutrition quality on host-parasite dynamics in wild wood mice
No full textFactors from the environmental, host, and parasite community levels can all
determine helminth burden in natural populations. In particular, the nutritional
resources available to the host have long been associated with helminths; a large
body of work in the laboratory has shown that both macro-and micro-nutrients play
an important role in host response to infection. However, the relationship among
nutrition, immunity, and helminth infection can depend upon several factors in the
wild including season, host condition, and co-infecting parasites. Co-infection is the
norm in natural populations, and the many parasites present may each have unique
and contradictory relationships with nutrition quality. Recent increase in
anthropogenic influences to the food available to wild animals –either accidental
through urban waste or intentional through supplemental feeders—has therefore
generated a crucial need for understanding the short- and long-term effects of
changes to nutrition quality on disease outcome in natural host-parasite systems. To
date, however, experimental, empirical data is still lacking in these areas particularly
in regards to naturally co-infected populations.
This thesis comprises a combination of statistical analysis and experimental work in
the field and laboratory in a wood mouse (A. sylvaticus) system. I carried out diet
supplementation manipulations for one laboratory and two field experiments
designed to investigate how experimental perturbation to host environment in the
context of resource availability influence the dynamics of both a highly prevalent
nematode, Heligmosomoides polygyrus, and co-infecting parasites within the system.
Making use of historical wood mouse trapping data, I further designed statistical
approaches to determine how much the natural variation in environmental context
affects host-parasite relationships
Using experimental diet supplementation in both a wild and a captive population of
A.sylvaticus, I found that supplemented nutrition quality increased both natural
resistance to H. polygyrus and the efficacy of anthelminthic treatment via increased
host condition and both general and H. polygyrus-specific immune investment. These
results have important consequences for the control of disease and transmission of
helminth infections in natural populations.
I screened wood mouse populations in the wild following diet supplementation for an
additional >10 parasite species including several other gastrointestinal helminths,
gastrointestinal protozoans, ectoparasites, and blood-borne protozoans, bacteria, and
viruses. I show that although supplemented nutrition decreased infection with
helminths and ectoparasites via increased investment in immunity and condition, it
unexpectedly increased infection risk and burden of some blood-borne and intestinal
microparasites. This gives important insight into how nutrition may shape parasite
communities and host fitness in wild populations where co-infection is the norm.
I carried out a long-term field experiment with ongoing nutrition supplementation to
investigate the effects of nutrition supplementation for host infection, reproduction,
and survival over multiple seasons. I found that beyond short-term effects on parasite
infection dynamics, supplemented nutrition drastically alters population dynamics
for wood mouse populations, and the effects of nutrition on immunity within the
population were both season- and cohort- dependent.
Finally, through statistical analysis of six years of trapping data across multiple sites
and seasons, I first show that there were significant drivers of helminth infection
intensity at both the environment and host level. However, by accounting for
spatiotemporal variation, I show further that these drivers varied significantly in
magnitude and direction according to environmental context (i.e. across-years), and
that sampling regime is key for the estimation of biological variation in H. polygyrus
dynamics in a natural population.
These results represent important experimental and statistical insights into the role of
resource availability and environmental context for host-parasite dynamics in the
wild. I discuss these findings and their implications for the study of nutrition quality
and infection dynamics in disease ecology. I also present several avenues of ongoing
and future work to complement insights provided by these experiments
FIT Authors Talks: "The Miracles" with Amy Lemmon
No full textProfessor and Chair of English and Communication Studies Amy Lemmon reads from and talks about her book The Miracles.With lyricism and grace, Amy Lemmon gives us a worldview to live by. The all-too-familiar “wear of sorrow’s rub” is presented alongside the world’s miracles, including the author’s two children. Fearlessly bridging the gap between tradition and artistic innovation, the author moves us forward with her into the unknown, to entertain new relationships with herself, her children, and the world
American Women Writers: Amy M. Clark
No full textA 2011 conversation with the author Amy M. Clark about her life and the inspiration for her work
Dr. Amy Howard – Faculty Author Interview
No full textAmy Howard, executive director of the Bonner Center for Civic Engagement and associated faculty in American studies, discusses her new book, More Than Shelter: Activism and Community in San Francisco Public Housing, published recently by the University of Minnesota Press. Her research and book looks closely at three public housing projects in San Francisco and brings to light the dramatic measures tenants have taken to create communities that mattered to them
Payton, Amy Louise. "Looking Back" radio show on Paytons book on Georgina Stirling.
No full textCBC freelance broadcaster Cathy Porter talking to author Amy Louise Payton about the life of Georgina Stirling, Soprano Premadonna from Twillingate. Payton talks about her interest in the singer and her book on Stirling; Hiram Silk interviews Amy Louise Payton on the program Looking Back about her book Nightingale of the North about Georgina Stirling. Payton talks about Stirling and the history of the Twillingate area
Sparrows can't sing : East End kith and kinship in the 1960s
No full textSparrows Can’t Sing (1963) was the only feature film directed by
the late and much lamented Joan Littlewood. Set and filmed in
the East End, where she worked for many years, the film deserves
more attention than it has hitherto received. Littlewood’s career
spanned documentary (radio recordings made with Ewan MacColl
in the North of England in the 1930s) to directing for the stage
and the running of the Theatre Royal in London’s Stratford East,
often selecting material which aroused memories in local audiences
(Leach 2006: 142). Many of the actors trained in her Theatre
Workshop subsequently became better known for their appearances
on film and television. Littlewood herself directed hardly any material
for the screen: Sparrows Can’t Sing and a 1964 series of television
commercials for the British Egg Marketing Board, starring Theatre
Workshop’s Avis Bunnage, were rare excursions into an area of practice
which she found constraining and unamenable (Gable 1980: 32).
The hybridity and singularity of Littlewood’s feature may answer,
in some degree, for its subsequent neglect. However, Sparrows Can’t
Sing makes a significant contribution to a group of films made in
Britain in the 1960s which comment generally on changes in the
urban and social fabric. It is especially worthy of consideration,
I shall argue, for the use which Littlewood made of a particular
community’s attitudes – sentimental and critical – to such changes and
for its amalgamation of an attachment to documentary techniques
(recording an aural landscape on location) with a preference for nonnaturalistic
delivery in performance
Letter from Amy Narawaki to Mr. and Mrs. A.W. Thomas, December 15, 1971
No full textA holiday letter of greetings on Christmas from Amy Nakawaki [=Emiko Amy Terada] in Stanton, California to Mr. and Mrs. A.W. Thomas in Lawndale, California, which contains basic correspondence.The James H. Osborne Nisei Collection contains mainly correspondence between Emiko and Usami Terada, incarcerees in the Rohwer incarceration camp, McGehee Arkansas, and the Thomas family in Lawndale, California, and photographs of the Teradas and the Thomases. The letters describe the trip from the Santa Anita Temporary Assembly Center to the Rohwer incarceration camp, their lives and conditions in the camp, and their concerns about their properties in Lawndale, California. Also included are photographs taken in the camp, some issues of "The Rohwer outpost," and fliers published during wartime
Writers Talk Featuring Amy Pennington and Social Media Experts
No full textPart one of OSU social media experts Ryan Squire (Medical Center), Debra Jasper (Kiplinger program), and Shaun Holloway (Fisher) discussing the changing landscape of media. Plus, OSU alum Meghan Wynne talks food writing with Urban Pantry author Amy Pennington.The media can be accessed here: http://streaming.osu.edu/knowledgebank/cstw11/Pennington_Amy_Social_Media.mp3Ohio State University. Center for the Study and Teaching of Writin
The racial romance of Amy Levy's "Reuben Sachs"
No full textOn its publication in 1888, Reuben Sachs by Amy Levy (1861-1889) was initially received as being anti-Semitic in both the Jewish and the mainstream presses. Many reviews were scathingly critical, and some singled out the author for special abuse ...Peer reviewedFinal article published
Navigating the Kingdom of night /
No full text"In 2011, Amy T Matthews published End of the Night Girl, a novel which engages creatively with questions of identity politics and the ethics of fictionalising the Holocaust. Navigating the Kingdom of Night is a critical exegesis in which the author contextualises End of the Night Girl in terms of the critical debate surrounding Holocaust fiction."In 2011, Amy T Matthews published End of the Night Girl, a novel which engages creatively with questions of identity politics and the ethics of fictionalising the Holocaust. Navigating the Kingdom of Night is a critical exegesis in which the author contextualises End of the Night Girl in terms of the critical debate surrounding Holocaust fiction.JSTO
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