Personnel: Ketchum


James Ketchum

James T. Ketchum

Position: Graduate Student Researcher

Campus Address:
Department of Wildlife, Fish, & Conservation Biology
University of California, Davis
One Shields Avenue
Davis, CA 95616

Phone: (530) 752-5830

Email: spam free email link to James Ketchum


Present: University of California, Davis - Doctoral Student, Graduate Group in Ecology

2003: Centro Interdisciplinario de Ciencias Marinas-IPN, La Paz, Mèxico - M.S. Marine Resources Management

1998: Universidad Autûnoma de Baja California Sur, La Paz, Mèxico - B.S. Marine Biology

Research Interests:

Movements and migratory patterns of sharks in association to biological and physical conditions; habitat use and environmental preferences of pelagic sharks; behavior and modeling of marine predator movements in oceanic islands; design of marine reserves; ultrasonic and satellite tracking and telemetry; remote sensing; oceanography.


Ketchum JT, Hearn A, Espinoza E, and Klimley AP (in prep) Diel and seasonal movements of scalloped hammerhead sharks (Sphyrna lewini) in the Galípagos Islands.

Ketchum JT, Galvín-Magaòa F, and Klimley AP (in prep) Distribution and habitat preferences of whale sharks (Rhincodon typus) in the southwestern Gulf of California.

Richert JE, Jorgensen SJ, Ketchum JT, Mohajerani L, and Klimley AP (submitted) The importance of pìnnacles and seamounts to pelagic fishes and fisheries off the southern Baja California Peninsula. Fisheries Management and Ecology

Hearn A, Ketchum JT, Shillinger G, Klimley AP, and Espinoza E (2008) Programa de investigaciûn y conservaciûn de tiburones en la Reserva Marina de Galípagos. Reporte Anual 2006-7. Fundaciûn Charles Darwin, Santa Cruz, Galípagos, Ecuador 114p.

Sergio F, Caro T, Brown D, Clucas B, Hunter J, Ketchum J, Mchugh K, Hiraldo F (2008) Top predators as conservation tools: ecological rationale, assumptions, and efficacy. Annual Review of Ecology, Evolution, and Sytematics 39:1-19

Hacohen-Domenè A, Galvín-Magaòa F, and Ketchum JT (2006) Abundance of whale shark (Rhincodon typus) preferred prey in the southern Gulf of California, Mexico. Cybium.

Ketchum JT (2005) Leave No Trace for Reefs. Outdoor skills and ethics for coral and rocky reefs. Leave No Trace and National Outdoor Leadership School, Lander. 32p


Ketchum JT, Shillinger G, Hearn A, Klimley AP. Movements and migratory patterns of sharks in the Galípagos Islands using satellite telemetry. Presented at the Argos User's Conference, Annapollis, Maryland, September 2008.

Ketchum JT. Shark movements and biological hotspots: implications for managing marine resources at the Galípagos Islands. Presented at the 10th Annual Bay Area Conservation Biology Symposium, University of California, Davis, February 2008.

Ketchum JT, Hoyos-Padilla M, Klimley AP. Conservaciûn de tiburones y otras especies del Archipièlago Revillagigedo: øun último refugio en el Pacìfico mexicano? Presented at the II Reuniûn Internacional de los Investigadores del Archipièlago Revillagigedo, Instituto Oceanogrífico del Pacìfico, Manzanillo, Colima, August 2007.

Ketchum JT. Seascape species and biological hotspots: A new approach to structure conservation action in the marine environment. Presented at the 9th Annual Bay Area Conservation Biology Symposium, University of California, Berkeley, February 2007.

Ketchum, J.T. and F. Galvín. Distribution and habitat preference of whale sharks (Rhincodon typus) in the Bay of La Paz and nearby oceanic waters. Presented at the IX Congreso de la Asociaciûn de Investigadores del Mar de Cortès and III Simposium Internacional sobre el Mar de Cortès, La Paz, B.C.S., May 2003.

Ketchum, J.T. Utilizaciûn del híbitat y comportamiento alimentario del tiburûn ballena (Rhincodon typus) en la Bahìa de La Paz, B.C.S. Presented at the I Foro de Intercambio Cientìfico sobre Tiburones y Rayas, Guaymas, Sonora, May 2003.

Ketchum, J.T. El tiburûn ballena en el Golfo de California. Presented at the I Semana del Tiburûn en la UNAM, Mèxico D.F., November 2000.

Ketchum, J.T. and A.R. Lozano. Observations on the seasonal occurrences of whale sharks (Rhincodon typus) in the southern Gulf of California. Presented at the American Elasmobranch Symposium: Natural History of the Whale Shark, La Paz, B.C.S., Mèxico, June 2000. 

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