Red List Category Year Assessed
Vulnerable Red List Criteria
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
In the north Atlantic, Shortfin Mako (Isurus oxyrinchus
) have likely undergone a decline in abundance (estimates based on logbook records ranging between 33 and 50%, demographic modeling suggesting a decline between 20 and 80%). In the northeast Atlantic landings data are not available for some countries, but the species is taken as a bycatch of the pelagic fishery. The area around the Strait of Gibraltar is thought to be a nursery area; most specimens caught there are juveniles. This area is heavily fished by the swordfish longline fleet. European Union (EU) vessels fishing for small pelagic species off the west coast of Africa are also known to take unquantified elasmobranch bycatch, including Shortfin Mako. There is no evidence of overfishing in the south Atlantic although data there are sparse and pelagic fishing pressure high. In the southwest Atlantic, Shortfin Mako is caught as bycatch in the pelagic longline fishery targeting mainly swordfish and tuna. Logbooks and landing data presented by, Brazil and Uruguay at ICCAT’s Sharks Sub-committee meeting in July 2007, show a decreasing trend in the catch per unit effort (CPUE) values since 2003. Given the apparent decline in abundance in the north Atlantic, the trends of the CPUE values in the southwest Atlantic and high fishing pressure from pelagic fleets throughout the Atlantic, this species is assessed as Vulnerable in the Atlantic.