IUCN Red List Assessment
Red List Category
NT
Near Threatened
Red List Criteria
Version
3.1
Year Assessed
2009
Assessor/s
Cailliet, G.M., Cavanagh, R.D., Kulka, D.W., Stevens, J.D., Soldo, A., Clo, S., Macias, D., Baum, J., Kohin, S., Duarte, A., Holtzhausen, J.A., Acuña, E., Amorim, A. & Domingo, A.
Reviewer/s
Fowler, S.L., Dudley, S., Soldo, A., Francis, M. & SSG Pelagic Shark Red List Workshop participants (Shark Red List Authority)
Contributor/s
Justification
Analysis of longline survey data of mainly juvenile individuals off southern California suggests that the Shortfin Mako (Isurus oxyrinchus) catch per unit effort (CPUE) may be declining slightly. However, recent tagging and tracking data show that it is also highly migratory, both vertically and horizontally, thus making accurate or precise population estimates difficult. There is no evidence to suggest that the eastern north Pacific subpopulation has been sufficiently depleted to warrant “Vulnerable” status at the present time, and this subpopulation is considered Near Threatened as a precautionary measure.
