SOYBEAN AGGLUTININ BINDING BY PRIMARY OLFACTORY AND PRIMARY ACCESSORYOLFACTORY PROJECTIONS IN DIFFERENT FROGS

Comparing eight species of frogs adapted to habitats ranging from aqua tic to arboreal, we observed differences in the affinity of primary ol factory projections to the lectin 'soybean agglutinin'. Particularly p ronounced differences exist between Pipa, a frog that rarely leaves th e water. and Eleutherodactylus, an arboreal species that does not even utilize aquatic environments for reproduction. We interpret these dif ferences as reflecting specializations to the perception of air-borne vs. water-borne odors.