Thesis (Ph. D.)--Texas A&M University, 2005. / "Major Subject: Entomology" Title from author supplied metadata (automated record created on Apr. 27, 2007.) Vita. Abstract. Includes bibliographical references.

Thesis (M. S.)--Texas A&M University, 2005. / "Major Subject: Entomology" Title from author supplied metadata (automated record created on Apr. 27, 2007.) Vita. Abstract. Includes bibliographical references.

Thesis (PH.D.) -- Syracuse University, 2006 / "Publication number AAT 3251760."

Thesis (Ph. D.)--Oklahoma State University, 2007. / Vita. Includes bibliographical references.

Thesis (Ph. D.)--Oklahoma State University, 2007. / Vita. Includes bibliographical references.

Thesis (M. S.)--Oklahoma State University, 2007. / Vita. Includes bibliographical references.

Thesis (Ph. D.)--Texas A&M University, 2007. / "Major Subject: Entomology" Title from author supplied metadata (automated record created on Oct. 13, 2008.) Vita. Abstract. Includes bibliographical references.

Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2007. / Source: Dissertation Abstracts International, Volume: 69-02, Section: B, page: 0800. Advisers: Susan E. Fahrbach; Gene E. Robinson. Includes bibliographical references. Available on microfilm from Pro Quest Information and Learning.

The literature concerning the metabolism of Daphnia is surveyed and in part re-interpreted to act as a frame for new work. The size factor in relation to reproductive phenomena is analysed in detail. An account is given of the pre-adult growth of Daphnia. based on 207 individuals belonging to 9 species reared in standard conditions. The greatest growth increment does not always occur at the end of the adolescent instar; it may occur at the and of the pre-adolescent instar or, more rarely ever, earlier. The effects of environmental factors on growth and reproduction are reviewed; it is shown that lack of oxygen inhibits the growth of D. magna. A mature female of D. magna can assimilate enough material during each instar to produce eggs with a dry weight at least equal to that of her body after the eggs have been laid. The dry weight of the parthenogenetic eggs of D. magna diminishes by 16--25 per cent during embryonic development. Storage metabolism and energy sources, respiratory metabolism, heart beat rate, caroterold metabolism and osmotic regulation are treated briefly. Some new observations on carotenoid-proteins in Daphnia are presented. The relation between the fat body and the ovary of Chydorua sphaericus is described. Two critical methods of correcting the haemoglobin index and a means of comparing the abilities of intra-specific groups to synthesise haemoglobin are given. Intrinsic factors influencing the ability to synthesise haemoglobin are analysed. Males gain and lose haemoglobin more quickly than females. Specific, racial and age effects are described. The present state of knowledge concerning haem metabolism in Daphnia is reviewed. The thesis concludes with a general summary which indicates the extent and limitations of our knowledge of the metabilism of Daphnia.

The difficulty of obtaining accurate and comparable measurements of the carotenoid content of plant and insect specimens is discussed. The carotenoids present in cabbage and in all stages in the life cycle of P. brassicas. were investigated: the carotenoids in the insect reflected those in the plant; male and female adults of P. brassicae seemed to possess similar amounts of carotenoids. In the plant there was a considerable variation in the carotenoids, both in quantity and in specificity. Age of the plant and season of growth were two factors, probably of several others, which were shown to influence the carotenoid content of the plant. The variation in the plant made it difficult to assess the significance of any variation in the earotenoids present in the insect. Feeding experiments showed that one larva during its life assimilated 77.79ug of b-carotene, which was 57.41% of the total b-carotene ingested. Of the total assimillted at least 66.10ug, that is 84.97%, was , Analysis of the frass indicated that greatest assimilation of p-carotene occurred at the end of the Lit larval stage. Labelling experiments seemed to show that carotenoids were sequestered from the haemolymph by the fat body four hours after ingestion. The carotenoid content of several other species of lepidoptera was determined. The results were often based on very different samples and therefore could not give reliable information about differences in amounts of carotenoid in the different species. However, they showed that earotenoids were present in all species studied. Lutein and b-carotene, two of the major plant carotenoids were found in all species in which individual carotenoids were determined and in all but examples either lutein or b-carotenewas the principal carotenoid in the insect. In species where males and females were available there was no apparent difference in the amount of carotenoids in the two sexes. Total carotenoids per -insect was shown to be positively correlated with the dry weight of the insect. Possible functions of earotenoids in insects are discussed, in particular as a source of vitamin A, in colouration and involvement in olfaction and toxicity.