Thesis (M.A.)--University of Canterbury, 2005. / Typescript (photocopy). "June 2005." Includes bibliographical references (p. 156-167). Also available via the World Wide Web.

Thesis (Ph. D.)--University of Wisconsin--Madison, 1959. / Typescript. Vita. Includes (as leaves 22-27): Bovine metabolism of organophosphorus insecticides : metabolism and residues associated with oral administration of dimethoate to rats and three lactating cows / W.C. Dauterman, J.E. Casida, J.B. Knaak, and Tadeusz Kowalczyk. Reprinted from Agricultural and food chemistry, vol. 7, no. 3 (Mar. 1959), p. 188-193. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 57-62).

Thesis (M.S.)--University of Wisconsin--Madison, 1969. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Thesis (M.S.)--University of Nevada, Reno, 2008. / "December, 2008." Includes bibliographical references. Online version available on the World Wide Web.

Thesis (M.A. in anthropology)--Washington State University, May 2009. / Title from PDF title page (viewed on May 28, 2009). "Department of Anthropology." Includes bibliographical references (p. 63-70).

Thèse (M.Sc.) -- Université Laval, 1998. / Bibliogr.: f. 74-80. Publié aussi en version électronique.

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No description available.

Tropical coastal wetlands are under ecological stress, most notably due to accelerated development activities associated with these areas. Consequently, natural resource depletion and environmental problems in the coastal sector are increasingly serious issues, particularly in South and South East Asia, and have significant implications for their traditional resource-user groups. This thesis is primarily based on a detailed investigation of the inter-relationships between environmental change and local perception of change at Koggala, Galle, southern Sri Lanka, where six sample Divisions bordering Koggala Lagoon were selected for in-depth study. Multi-disciplinary techniques from both the natural and the social sciences were employed, focusing on the environmental changes involved and on the perceptions of these changes by local fishing and farming communities. Particular attention was paid to changes in agriculture, to the reconfiguration of a coastal sand bar, and to the development of a Free Trade Zone. Participatory techniques involved the experimental use of group discussions. Visits were made to Malaysia and Thailand for comparative study purposes. Results show that the fringing mangrove complex is currently threatened by a number of factors and that sand mining close to the lagoon outlet has severely disrupted water levels in the lagoon and ultimately rice-farming systems. The fishing community further perceives significant declines in their fish catch, attributing this to the loss of fishery nursery sites and to the seepage of agro-chemicals, some belonging to highly toxic groups, into the lagoon. It is clear that local communities display a high degree of awareness of environmental change, as well as of the causes of this change. Such understanding can be used to develop local-level adaptive planning for wetland management. The use of discussion groups is seen as a novel approach to such wetland management programmes in the tropics.

Made available in DSpace on 2014-06-11T19:27:56Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-02-22Bitstream added on 2014-06-13T19:36:18Z : No. of bitstreams: 1 pascotto_vm_me_botfm.pdf: 1234125 bytes, checksum: 1d563b2c7f6645fcba3865762f9c46c7 (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) / O presente projeto objetivou investigar os efeitos da combinação, em baixas doses, de cinco praguicidas (dieldrin, dicofol, endosulfan, diclorvos e permetrina) sobre o sistema reprodutor de ratas Sprague-Dawley, Wistar e Lewis. Ratas de cada linhagem, com seis semanas de idade, foram randomizadas em três grupos: GI: controle negativo; GII: praguicidas adicionados à ração em doses de NOEL (mg/Kg/dia) - diclorvos (0,23), dicofol (0,5), dieldrin (0,025); endosulfan (0,7), permetrina (5); GIII: praguicidas adicionados à ração em doses de LOEL (mg/Kg/dia) - diclorvos (2,3), dicofol (2,1), dieldrin (0,05), endosulfan (3,8), permetrina (25). A eutanásia foi realizada entre a 10ª e a 12ª semana experimental, na fase de estro. Os parâmetros de avaliação foram: peso de fígado, útero e ovários; análise histológica qualitativa de fígado, útero e ovários; morfometria do endométrio; avaliação do ciclo estral; dosagem de LH, FSH e progesterona; e contagem de folículos ovarianos. Animais das três linhagens tratados com a LOEL apresentaram toxicidade sistêmica, evidenciada pela diminuição de peso corpóreo e aumento de peso de fígado. A análise qualitativa de útero e ovários, assim como a avaliação do ciclo estral e níveis hormonais não indicaram sinais de toxicidade reprodutiva exercida pelas misturas. A contagem de folículos ovarianos indicou ausência de resposta dose dependente e alta variabilidade entre os animais de mesmo grupo experimental. Desta forma concluímos que, embora os resultados tenham mostrado diminuição de algumas populações foliculares nas doses de NOEL e LOEL, este parâmetro não pode ser utilizado isoladamente como indicativo de toxicidade reprodutiva. Estes achados remetem à necessidade de maiores estudos para o esclarecimento dos efeitos destes compostos nas populações foliculares / This project aimed to investigate the effects of the combination, in low doses, of five pesticides (dieldrin, dicofol, endosulfan, dichlorvos and permethrin) on the reproductive system of Sprague- Dawley, Wistar and Lewis rats. Six-weeks-old rats from each strain were randomized into three groups: GI: negative control; GII: pesticides added to the feed at NOEL doses (mg/kg/day) - dichlorvos (0.23), dicofol (0.5), dieldrin (0.025), endosulfan (0.7), permethrin (5), GIII: pesticides added to the feed at LOEL doses (mg / kg / day) – dichlorvos (2.3), dicofol (2.1), dieldrin (0.05), endosulfan (3.8), permethrin (25). Euthanasia was performed between the 10th and 12th experimental week, in the estrous stage. The evaluation parameters were: weight of liver, uterus and ovaries; qualitative histological analysis of liver, uterus and ovaries; endometrium morphometry; estrous cycle assessment; dosage of LH, FSH and progesterone; and counting of ovarian follicles. Animals from all three strains showed systemic LOEL toxicity, as evidenced by decreased body weight and increased liver weight. Qualitative analysis of the uterus and ovaries, as well as estrous cycle and hormone levels evaluations indicated no signs of reproductive toxicity exerted by the mixtures. Counting of ovarian follicles indicated lack of dose-dependent response and high variability among animals from the same experimental group. Hence, we concluded that, although our results have shown a decrease of some follicular populations at the NOEL and LOEL doses, this parameter can not be used alone as an indicator of reproductive toxicity. These findings underscore the need for more studies to clarify the effects of these compounds on follicular populations