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Resumen del producto
Perez-Lezama, E.L., E.A., Chávez Ortiz, B., Shirasago Germán & M., Obeso Nieblas
(2011).
Demographic model of a sea lion breeding colony in the southern Gulf of California.
Current Development in Oceanography.
2(1): 1-16.
Demographic model of a sea lion breeding colony in the southern Gulf of California
Edgar Leonardo Perez-Lezama, Ernesto Aarón Chávez Ortiz, Bernardo Shirasago Germán y Maclovio Obeso Nieblas
The California sea lion (Zalophus californianus) is the most abundant pinniped in northwestern Mexico. Five cohorts at the breeding colony on a small island (Los Islotes) in the Gulf of California were tagged and monitored over their lifespan to create data for demographic modeling. Changes in demographic characteristics from 1979 through 2004 were analyzed. Estimates of growth rate, length-weight relationships, and mortality coefficient per age and sex groups are provided. A 25-year simulation period showed a deficit in the number of pups with respect to adult females arriving at the colony. This analysis of the population dynamics provides an accuracy that was not possible in previous studies.
Palabras clave: Zalophus californianus; pinniped; Population dynamics; Body growth; sea lion; breeding colony
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