@article{fdi:010066706, title = {{K}nocking on heaven's door : are novel invaders necessarily facing naive native species on islands ?}, author = {{G}erard, {A}. and {J}ourdan, {H}erv{\'e} and {M}illon, {A}. and {V}idal, {E}ric}, editor = {}, language = {{ENG}}, abstract = {{T}he impact of alien predator species on insular native biota has often been attributed to island prey naivete (i.e. lack of, or inefficient, anti-predator behavior). {O}nly rarely, however, has the concept of island prey naivete been tested, and then only a posteriori (i.e. hundreds or thousands of years after alien species introduction). {T}he presence of native or anciently introduced predators or competitors may be crucial for the recognition and development of adaptive behavior toward unknown predators or competitors of the same archetype (i.e. a set of species that occupy a similar ecological niche and show similar morphological and behavioral traits when interacting with other species). {H}ere, we tested whether two squamates endemic to {N}ew {C}aledonia, a skink, {C}aledoniscincus austrocaledonicus, and a gecko, {B}avayia septuiclavis, recognized and responded to the odor of two major invaders introduced into the {P}acific islands, but not yet into {N}ew {C}aledonia. {W}e chose one predator, the small {I}ndian mongoose {H}erpestes javanicus and one competitor, the cane toad {R}hinella marina, which belong respectively to the same archetype as the following two species already introduced into {N}ew {C}aledonia in the nineteenth century: the feral cat {F}elis catus and the golden bell frog {L}itoria aurea. {O}ur experiment reveals that geckos are naive with respect to the odors of both an unknown predator and an unknown competitor, as well as to the odors of a predator and a competitor they have lived with for centuries. {I}n contrast, skinks seem to have lost some naivete regarding the odor of a predator they have lived with for centuries and seem "predisposed" to avoid the odor of an unknown potential competitor. {T}hese results indicate that insular species living in contact with invasive alien species for centuries may be, although not systematically, predisposed toward developing adaptive behavior with respect to species belonging to the same archetype and introduced into their native range.}, keywords = {{NOUVELLE} {CALEDONIE}}, booktitle = {}, journal = {{P}los {O}ne}, volume = {11}, numero = {3}, pages = {e0151545 [14 p.]}, ISSN = {1932-6203}, year = {2016}, DOI = {10.1371/journal.pone.0151545}, URL = {https://www.documentation.ird.fr/hor/fdi:010066706}, }