Analysis of the re colonization of San Benito Archipelago by Guadalupe fur seals (Arctocephalus townsendi)

Guadalupe fur seals (Arctocephalus townsendi) have shown significant population growth and successful re-colonization at the San Benito Archipelago (SBA), with an annual growth rate of 21.6% from 1997 to 2007, reaching a total of 2,227 individuals. This study reveals that SBA's colony exhibits similar reproductive biology and food preferences compared to the Guadalupe Island population, primarily consuming three squid species (Loligo opalescens, Onychoteuthis banksii, Dosidicus gigas). The research also highlights differences in maternal care strategies between the two colonies, suggesting varying nursing-foraging behaviors. Additionally, the SBA colony's proximity to key feeding areas may contribute to its growth potential, with no apparent limitations on reproductive space or food resources.

Esperon Rodriguez, M., & Gallo Reynoso, J. P. (2012). Analysis of the re colonization of San Benito Archipelago by Guadalupe fur seals (Arctocephalus townsendi). Latin American Journal of Aquatic Research, 40(1), 213–223. https://doi.org/10.3856/vol40-issue1-fulltext-20