Most slugs are hermaphroditic, possessing both male and female sex organs. This makes slugs particularly dangerous as invaders because even a single individual that escapes detection can establish a population in a new environment through self-fertilization. This 11-page fact sheet discusses the slug situation in Florida, including problems with slug identification and taxonomy, as well as the behavior, ecology, and management of slugs. Written by John L. Capinera and Jodi White and published by the UF Department of Entomology and Nematology , June 2011.
http://edis.ifas.ufl.edu/in891