Thèse de doctorat : Littérature générale et comparée : Paris 12 : 2003. / Titre provenant de l'écran-titre.

Thesis (M.A.) -- University of Portland, 2008. / Title from PDF t.p. (viewed on Oct. 13, 2008). Includes bibliographical references.

Texte remanié de: Diss.--Theologische Fakultät--Freiburg i. Brsg.--Albert-Ludwigs-Universität, 2006.

There is no abstract available for this thesis.

Thesis (M.A.)--University of Wisconsin--Madison, 1982. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 138-146).

Potsdam, University, Diss., 2003.

The population energetics of two species of amphipods was studied at several depths in Marion Lake, BC. Hyalella azteca was abundant at a depth of 1.0 m, (mean summer standing crop, 1952 animals/m2 but became rare (75 animals/m2 at depths greater than 2.5 m. Growth rates, res- piration rates, and hence energy flow were decreased by the lower ambient temperatures of deeper water, On an annual basis, a mean standing crop of 1.1 Kcal/m2 of Hyalella assimilated 18.1 Kcal/m2 respired 14.1 Kcal/m2 and used 4.0 Kcal/m2 in production of growth, molts and eggs, Approximately 3/4 of the annual energy flow was completed between June and October, The ecological efficiency of Hyalella populations was 10, the net production efficiency, 22%, and the net population growth efficiency, 12%-13%, The mean summer density of Crangonyx remained constant with depth (about 249 animals/m2). Annual energy flow and production were not appreciably affected by lower temperatures in deeper water. On an annual basis, a mean standing crop of 0.7 Kcal/m2 assimilated 7.7 Kcal/m2 respired 6.3 Kcal/m2 and used 1.4 Kcal/m2 in production Crangonyx energy flow was fairly constant throughout the year. The ecological efficiency of Crangonyx was 8%, the net production efficiency, 17%-19%, and the population growth efficiency, 14%-15%. Annually, Hyalella populations assimilated only twice as much and produced about 3 times as much energy as did Crangonyx populations, but during the summer, Hyalella energy flow was 4 times that of Crangonyx. A synthesis of existing data on poikilotherm energetics suggests that life history phenomena are important in determining the relationship between annual population respiration and production. Also, annual production and assimilation were found to be closely related to the mean standing crop of various organisms. / Science, Faculty of / Zoology, Department of / Graduate

This study provides the first quantitative analysis of the littoral and supralittoral arthropod assemblages of sub-Antarctic Marion Island. Seventeen mite species (126 203 individuals) from 11 families were found on the shore at Macaroni Bay. Three families dominated the assemblages in both abundance and diversity: the Hyadesiidae, Ameronothridae and Halacaridae. Six insect species from three orders were found on the shore. Species richness increased from one in the littoral, to four and two species in the Mastodia and Caloplaca zones, respectively. The littoral, chironomid midge, Telmatogeton amphibius was the most abundant insect species, constituting 80% of all insects counted. Arthropod assemblages corresponded closely to the cryptogram dominated zonation patterns previously identified for the Marion Island shore. This clear association between arthropod and cryptogam zonation patterns provided a clear indication of habitat specificity in many of the species, and a quantitative analysis of habitat specificity on a species by species basis supported this tenet. The specificity of most species to the shore, which forms part of the epilithic biotope, is most likely a consequence of the considerable age of this biotope compared to the younger, post-glacial vascular vegetation. Tourist species, i.e. species transient to an assemblage, inflated species richness in zones and the distribution ranges of species across zones. It is suggested that previous, qualitative analyses of shoreline arthropod communities may have overestimated species ranges and richnesses because of the inclusion of tourist species. It is suggested that if a sound understanding of patterns in and processes underlying Antarctic arthropod assemblages is to be achieved, quantitative analyses must be expanded in the region. In this study the spatial patterns of littoral and supralittoral arthropods from sub-Antarctic Marion Island are examined. Primary consumers were by far the most diverse group on the shore, with nine algivore and ten fungivore species from a total of 23 species. Positive species associations were found in the Mastodia and Caloplaca zones and positive abundance covariation in the Verrucaria, Mastodia and Caloplaca zones. There were no negative associations between any taxa, indicating that interspecific interactions on the shore are either minimal or absent. Significant interactions were related to the diversity of the respective habitats, with higher diversity resulting in higher levels of positive associations and abundance covariation. High levels of aggregation clearly demonstrated that species were not randomly distributed within habitats. Intraspecific aggregation was generally higher than interspecific aggregation in the five habitats and if competition was to occur it would most likely be among conspecifics. The absence of suitable biological information for species precluded further analyses of competition. However, if competitive interactions were found to occur between heterospecifics then coexistence would best be explained using the aggregated nature of superior competitors, allowing weaker competitors to coexist in zones. Positive associations between species were attributed to favourable environmental conditions, the availability of limiting resources (e.g. shelter) and the structure of the dominant cryptogram species. Body sizes, spanning five orders of magnitude (0.5 J.1g - 26 mg), were measured for 59 of the approximately 120 invertebrate species on Marion Island. Mass-length and fresh-dry mass relationships were calculated for orders, families and species (for those with sufficient data). A comparison of their slopes indicates that for prediction of body mass it may be useful to use regressions from the lowest taxonomic rank possible. Differences between the mass-length relationship for Marion Island insects (log mass = -4.294 + 3.151 log length) and other relationships on continental assemblages raises the questions as to the applicability of these results. This study should prove useful for estimating body sizes for other, similar taxa in the Antarctic and provide baseline information on an important species trait that seems to be changing with local and global environmental changes. / Dissertation (MSc (Entomology))--University of Pretoria, 2007. / Zoology and Entomology / unrestricted

No description available.

This thesis was designed to determine readers'.perceptions of the Marion Chronicle-Tribune's coverage of the 197E Marion teachers' strike.An attitude questionnaire was sent out to a random sample of the newspaper's subscription list. Of the 972 instruments mailed, 199, or 23.6 percent, were returned properly and used as data.Participants' responses were analyzed by program QUANAL. The analysis produced three subscriber types. Type I was conservative, pro-Chronicle-Tribune; Type II was labor oriented; and Type III was undecided. A multiple regression test of the demographic factors, age, sex, level of education, annual income, whether respondent was labor or management, and the amount of time a respondent read the Chronicle-Tribune daily, yielded no relationship with the reason why a respondent was identified with one of the three types.The researcher concluded that subscribers perceived coverage on the basis of the issues, and not according to what stereotypes they may have held.