IUCN Red List Assessment
Red List Category Year Assessed
Least Concern Red List Criteria Version
Hammond, P.S., Bearzi, G., Bjørge, A., Forney, K., Karczmarski, L., Kasuya, T., Perrin, W.F., Scott, M.D., Wang, J.Y., Wells, R.S. & Wilson, B. Reviewer/s
Rojas-Bracho, L. & Smith, B.D. (Cetacean Red List Authority) Justification
Lissodelphis borealis History
is widespread and abundant, with population estimates in the high tens to low hundreds of thousands throughout their North Pacific range. High levels of bycatch during the 1970s and 1980s are estimated to have reduced their population size within the last three generations by an unknown amount, but the most realistic scenarios suggest the decline was 30% or less. The primary threat to this species (high seas driftnet fishing), which caused the population decline, has largely been eliminated since 1993.
Lower Risk/least concern