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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.

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Showing 1 to 10 of 39 (0.062 seconds)
1

Natural survivorship estimates for the West Coast rock lobster Jasus Lalandii obtained using a size-based modelling approach

Johnston, Susan Joy January 1991 (has links)
Natural survivorship for the South African west coast rock lobster resource, Jasus lalandii, is estimated at two locations, Robben Island and Hout Bay. A size-based modelling approach is used, in which the model is fitted, to pristine catch size frequencies. The natural survivorship value for lobsters in the Robben Island region is estimated to be 0.94. The natural survivorship value for Hout Bay lobsters is estimated to be 0.87. The natural survivorship estimates are found to be very sensitive to rock lobster growth rate. The Robben Island estimate decreases from 0.968 for a decrease of 40% in the growth rate, to 0.9 7 for a increase of 40% in the growth rate. These estimates.are compared with those made for lobsters in more northern areas. The implications of these natural survivorship estimates are discussed. A simple, direct method is used to estimate natural survivorship for Robben Island and Hout Bay, and the results are compared to those obtained with the model. Includes bibliographical references (pages 64-68).
Quantitative Resource Ecology
2

Forest policy forest loss and land use cover change in Cameroon /

Mbatu, Richard Sungkekang. January 2006 (has links) (PDF)
Thesis (Ph. D.)--Oklahoma State University, 2006. / Vita. Includes bibliographical references.
3

Use of a tree growth regulator to manage vegetation near overhead power lines

Mathews, Steven, January 2009 (has links) (PDF)
Thesis (M.S.)--Oklahoma State University, 2009. / Vita. Includes bibliographical references.
4

Nesting and feeding ecology of grassland birds in mixed-grass prairie managed with parch-burn techniques

Doxon, Elizabeth Diane, January 2009 (has links) (PDF)
Thesis (Ph.D.)--Oklahoma State University, 2009. / Vita. Includes bibliographical references.
5

Avian response to old world bluestem (Bothriochloa Ischaemum) monocultures in mixed-grass prairie

George, Andrew D., January 2009 (has links) (PDF)
Thesis (M.S.)--Oklahoma State University, 2009. / Vita. Includes bibliographical references.
6

Effects of Juniperus Virginiana encroachment on plant and avian diversity in Oklahoma cross timbers forest

Van Els, Paul. January 2009 (has links) (PDF)
Thesis (M.S.)--Oklahoma State University, 2009. / Vita. Includes bibliographical references.
7

Herbicide control and seed bank dynamics of old world bluestem

Robertson, Scott Gallup. January 2009 (has links) (PDF)
Thesis (M.S.)--Oklahoma State University, 2009. / Vita. Includes bibliographical references.
8

Tree fall gap dynamics in the cross timbers of Oklahoma

Karki, Laxman, January 2007 (has links) (PDF)
Thesis (M.S)--Oklahoma State University, 2007. / Vita. Includes bibliographical references.
9

Plants, grazing, and fire in tallgrass prairie

Allred, Brady W., January 2008 (has links) (PDF)
Thesis (M.S.)--Oklahoma State University, 2008. / Vita. Includes bibliographical references.
10

The effects of disturbance in grassland plant communities

Limb, Ryan Frank. January 2008 (has links) (PDF)
Thesis (Ph. D.)--Oklahoma State University, 2008. / Vita. Includes bibliographical references.

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