IUCN Red List Assessment
Red List Category Year Assessed
Endangered Red List Criteria
Compagno, L.J.V., Kyne, P.M. & Domingo, A. Reviewer/s
Valenti, S.V & Fowler, S.L. (Shark Red List Authority) Contributor/s Justification
The Sharpfin Houndshark (Triakis acutipinna
) is an extremely rare shark, known only from a limited region of inshore continental Ecuador (the Province of Manabí). It is poorly known, and its exact distribution is uncertain. Since it was originally described from Isla de la Plata 40 years ago, the only other known records are rare landings from coastal gillnet fisheries in the nearby coastal fishing port of Daniel López (less than 39 km from Isla de la Plata). Its entire known extent of occurrence, as with the majority of the Ecudorian coastline, is subjected to effectively unregulated small-scale artisanal fisheries. These fisheries land various species of shark, and in some cases they target sharks (including houndsharks). A reduction in landings in small-scale coastal fisheries has been noted in recent years. It is unknown if the species is also taken in other inshore artisanal fisheries. Despite the lack of catch statistics and specimens of the species, the Sharpfin Houndshark's estimated extent of occurrence is considerably less than 5,000 km², as presently known. The population size is considered to be less than 2,500 individuals on the basis of very few records within a restricted area (with no evidence for genetically or geographically distinct populations), and a continuing decline in the number of mature individuals is suspected on the basis of continued unregulated exploitation throughout its known range. An assessment of catches and sampling of inshore fisheries should be a priority, to determine its exact extent of occurrence. If such sampling expands the species? known distribution, then this assessment would need to be revisited.