Tomoharu Eguchi
Contact Information:
Department of Ecology
Montana State University, Bozeman
310 Lewis Hall
Bozeman, MT 59717
eguchi@montana.edu
(406) 994-1769
Index
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I am interested in application of statistics in ecological studies, demography, mathematical modeling, and simulations of biological populations. Because my past research has been in marine sciences, I am interested in biological populations in marine ecosystems.
- I recently finished my Ph.D. dissertation on estimating the abundance of the bottlenose dolphin (Tursiops truncatus) along the Atlantic coast of the United States by using a mark-recapture and a Bayesian approach. The project outline can be found in this page. You may download the entire dissertation in the PDF format from here.
- For my past research experience, please see my resume.
- Current Research (This page is password protected.)
Estimating the abundance of the coastal form of bottlenose dolphins along the coast of NC and northern SC. We collected photographic identification data between 8 July 2003 and 10 August 2003.
- Ph.D. research (Estimating abundance of bottlenose dolphins along the Atlantic coast of the United States)
Numerous photo identification studies have been conducted on bottlenose dolphins along the Atlantic coast of the United States. individual identification can be made by looking at nicks and scars on the dorsal fin of a bottlenose dolphin. By conducting a longitudinal study, previously identified dolphins may be re-sighted. Researchers along the coast have been collecting numerous photographs of bottlenose dolphins for many years. Sighting histories of identified bottlenose dolphins can be used as "capture-recapture" data, when capture is thought as obtaining high quality photographs of a bottlenose dolphin. We think these data are useful for estimating the abundance if they were combined together. Because we try to use existing data rather than initiating a new study, we decided to use a Bayesian approach. The dissertation is available in the PDF format. You can download it by chpaters or as a whole:
- Entire thesis
- Front matter
- Chapter 1: Introduction
- Chapter 2: The Bottlenose Dolphin
- Chapter 3: A reanalysis of the change in the abundance of the coastal migratory stock of the bottlenose dolphin during the 1987-1988 epizootic.
- Chapter 4: A statistical method for estimating the abundance of a population with capture-mark-recapture data and a hierarchical Bayes approach
- Chapter 5: Abundance estimates of bottlenose dolphins in inshore waters along the Atlantic coast of the United States using the existing photographic identification data
- Chapter 6: Conclusions
- Literature Cited
- Appendices
- What have I done! (My master's thesis)
For my master's thesis, I studied movements, diving behavior, and morphology of the Pacific harbor seal in the Monterey Bay area, California, with my advisor Dr. James T. Harvey at Moss Landing Marine Laboratories. You may download the entire thesis in the PDF format (To be created). The result of the study will be published soon (hopefully). For now, you can read the abstract and see a typical harbor seal in action.
Last modified: 13 Jan 2004