Endangered and Threatened Wildlife and Plants: Proposed Rule To List the Maui's Dolphin as Endangered and the South Island Hector's Dolphin as Threatened Under the Endangered Species Act

Résumé

We, NMFS, propose to list the Maui's dolphin (Cephalorhynchus hectori maui) as endangered and the South Island Hector's dolphin (C. hectori hectori) as threatened under the Endangered Species Act (ESA). We have reviewed the best available scientific and commercial data and completed a comprehensive status review for these two subspecies of Hector's dolphin (C. hectori). The Maui's dolphin faces serious demographic risks due to critically low abundance, a low population growth rate, a restricted range, low genetic diversity, and ongoing threats such as bycatch in commercial and recreational gillnets. We have determined Maui's dolphin is currently in danger of extinction throughout its range and, therefore, meets the definition of an endangered species. The relatively more abundant and more widely distributed South Island Hector's dolphin has experienced large historical declines and is expected to continue to slowly decline due to bycatch and other lesser threats, such as disease and impacts associated with tourism. We have determined that this subspecies is not currently in danger of extinction throughout all or a significant portion of its range, but is likely to become so within