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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

A Winnipeg constructed wetland: inciting curiosity, facilitating learning and fostering engagement

Macdonald, Ian 15 April 2016 (has links)
In urban areas, traditional lake-style retention ponds do little to remediate pollutants such as sediments, pesticides and fertilizers contained in stormwater. As an alternative, some neighborhoods now feature naturalized constructed wetlands, often located in large open public spaces such as schoolyards. These settings can offer opportunity for physical engagement and education. Can these constructed wetlands function both as stormwater detention facilities and outdoor classrooms? If teachers can foster engagement and curiosity, learning becomes intrinsic - an end in itself rather than a means to short term reward. Landscapes can be a means to this end, providing open-ended and meaningful learning opportunities that can inspire children to learn, play and discover. The intent of this practicum is to redesign an existing, lake-style retention pond adjacent to a south Winnipeg schoolyard, integrating ecological, recreational and educational functions. The pond will be transformed into a functioning wetland ecosystem, community amenity and outdoor classroom. / May 2016
2

Development of a decision support system for pond aquaculture /

Nath, Shree S. January 1996 (has links)
Thesis (Ph. D.)--Oregon State University, 1997. / Typescript (photocopy). Includes bibliographical references (leaves 233-256). Also available online.
3

Nest site characteristics of the Western Pond Turtle, Clemmys marmorata, at Fern Ridge Reservoir, in West Central Oregon /

Holte, Deborah Lyn. January 1998 (has links)
Thesis (M.S.)--Oregon State University, 1998. / Typescript (photocopy). Includes bibliographical references (leaves 102-106). Also available online.
4

Use of an artificial pond and marshes by amphibians and reptiles in West Virginia

Dozeman, Vanessa A. January 2004 (has links)
Thesis (M.S.)--Marshall University, 2004. / Title from document title page. Document formatted into pages; contains vii, 82 p. including illustrations. Includes abstract. Includes bibliographical references (p. 36-38).
5

A comparison of western pond turtle (Actinemys marmorata) movements in perennial and intermittent portions of a Northwestern California river system /

Bondi, Cheryl A. January 1900 (has links)
Thesis (M.A.)--Humboldt State University, 2009. / Includes bibliographical references (leaves 65-69). Also available via Humboldt Digital Scholar.
6

Ověření možnosti dlouhodobě udržitelné akvakultury na Boheľovakých rybnících

ŠINDLER, Martin January 2017 (has links)
The focus of the thesis was verifying the effects of fish breeding in production-oriented fish farming on the ecosystem of fish ponds. The observation was conducted in R1 and R3 Boheľov fish ponds in 2014 and 2016 seasons. The RKK and SGR parameters, the natural fish pond production and the overall production were monitored. The monitored chemical and physical parameters included the developments of the essential parameters at two-week intervals; oxygen, pH, transparency, temperature and insoluble substances. Chlorophyll-a, total phosphorus and total nitrogen were monitored to assess the timely trophy in the ponds. To assess the effects on water organism community zooplankton succession by Cladocera, Copepoda and Rotifera taxonomic orders was monitored at two-week intervals. The monitoring also included periodical checking of the biomass of undesired fish that reached the value of 44,5 kg.ha-1 in the R3 pond. Roach (Rutilus rutilus) was the dominating specie. Control fishing was carried out during the seasons to estimate the actual biomass of carp stock. The total production ranged between 922,1 - 1181,5 kg.ha-1. The RKK level was 2,73 - 3,26. The SGR value of 0,902 %.day-1 was reached in stock C1-2. High carp stock influenced the zooplankton communities. During the observation no occurrence of the intermediate zooplankton was found. The prevailing species of the Cladocera order included Bosmina longirostris, Dafnia galeata and D. parvula. In the Cladocera order there was prevalence of Acanthocyclops trajani and in rotifera order there was prevalence of Brachionus calycifloris, Asplanchna priodonta, Polyartha sp. Spearman's correlation confirmed difference between the total zooplankton in R1 pond compared with R3 pond in both seasons (R3 2014: rho=0,066; pval=0,854; R3 2016 rho=-0,018; pval=0,96). The TSI index showed hypertrophic condition in both ponds. The average values of the index were 78,3 (6,2) in R1 and 75,6 (?3,8) in R3. The lowest average oxygen values, namely 3,2 mg.l-1 (2,0), were in pond R3 in 2016. Taking account of the adverse development of the essential parameters (oxygen and clarity deficits) and the status of the trophy certain limitation of the farming intensity was proposed, namely: reducing the carp stock down to 1/3 including a calculation of the production-related financial loss. Reducing the stock is the only way how to make the fish ponds sustainable. Relevant compensation, in line with the effective European regulations, needs to be addressed hand in hand with the proposed measures.
7

Understanding the community-level impacts of tourism development : the case of Pond Inlet, NWT

Grekin, Jacqueline January 1994 (has links)
This thesis aims to provide a better understanding of the economic and socio-cultural impacts associated with small scale tourism development in the Inuit community of Pond Inlet, Baffin Island. A brief history and economic profile of the community illuminate the reasons underlying its adoption of tourism as a source of income and employment. I then proceed to review past attempts to understand the relationship between tourism and community development. Despite the merits of these studies, they are shown to have largely failed to supply a theoretical framework capable of explaining the underlying factors that influence the scale and nature of the resulting impacts. I then propose that recent theoretical developments, based on the 'flexible specialization' approach, may better assist our attempts to understand the dynamic relationship between tourism and the communities that host it. / The empirical section of the thesis is based on surveys of several key actors: residents, tourists, and the tourist industry. When combined with a simplified multiplier analysis, the findings indicate that the community's current tourism strategy is largely consistent with local economic objectives and that as a result residents support tourism development. Nevertheless, the results suggest certain weaknesses in the current approach to tourism development. They include: the potential for conflicts to develop between local hunters and wildlife watchers; a failure to link tourism to other sectors of the local economy; and difficulties reaching consumers in the context of a restructured travel industry increasingly dominated by computer technology. I then proceed to provide some policy and planning recommendations. This is followed by a brief evaluation of the theoretical approach adopted. I conclude by outlining some areas for future research.
8

Macroinvertebrate colonization and production in new experimental ponds /

Layton, Raymond J., January 1989 (has links)
Thesis (Ph. D.)--Virginia Polytechnic Institute and State University, 1989. / Vita. Abstract. Includes bibliographical references (leaves 126-138). Also available via the Internet.
9

Physical dimensions and hydrologic effects of beaver ponds on Kuiu Island in southeast Alaska /

Beedle, David L. January 1991 (has links)
Thesis (M.S.)--Oregon State University, 1992. / Typescript (photocopy). Includes bibliographical references (leaves 87-90). Also available on the World Wide Web.
10

An ecological study of large aquatic plants in small ponds

Jones, Sara Elizabeth. January 1947 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1947. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 121-128a).

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