ISLAND CONSERVATION ACTION IN NORTHWEST MÉXICO C. Josh Donlan1,2, Bernie R. Tershy1,4, Brad S. Keitt1,3, Bill Wood1, José Ángel Sánchez5, Anna Weinstein1, Donald A. Croll1,4, Miguel Ángel Hermosillo5, and José Luis Aguilar6 1 Island Conservation and Ecology Group, P. O. Box 141, Davenport, CA 95107 (831) 469-8651, FAX (831) 469-8651, E-mail:
[email protected] 2 Dept. of Biology, A-316 E.M.S. Building, University of California, Santa Cruz, CA 95064 (831) 459-4581, FAX (831) 459-4882 3 Dept. of Ocean Sciences, A-316 E.M.S. Building, University of California, Santa Cruz, CA 95064 (831) 459-4581, FAX (831) 459-4882 4 Institute of Marine Sciences, A-316 E.M.S. Building, University of California, Santa Cruz, CA 95064 (831) 459-3610, FAX (831) 459-4882 5 Grupo de Ecología y Conservación de Islas A. C., AP 71, Guerrero Negro, Baja California Sur 23940 México 011-52 (115) 7-11-20, FAX 011-52 (115) 7-11-20 6 Departamento de Áreas Naturales Protegidas, Secretaría del Medio Ambiente Recursos Naturales y Pesca, Delegación Baja California. Privada Riviera # 1-A, Conjunto PRONAF, Zona Centro. Ensenada, Baja California 763510 México 011-52 (617) 6-35-10, FAX 011-52-(617) 6-09-77 ABSTRACT INTRODUCTION Introduced mammals are present on many of the over Islands cover 2.7% of the earth’s surface (AMNH 230 islands and islets in northwest México. Introduced mam- 1998). Islands around the world are of critical importance mals threaten many endemic species with extinction: of the to global biodiversity because they are rich in endemic spe- 19 island vertebrate extinctions in northwest México, 18 can cies and important breeding areas for many wide-ranging be attributed to introduced mammals.