Parasitism of Trees by Marmosets in a Central Brazilian Gallery Forest

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Abstract
Common marmosets (C. j. penicillata) living in a central Brazilian gallery forest depend heavily on exudates as a food. The marmosets gnaw holes in the bark of certain tree species and all exudate collection takes place at these holes. Marmosets thus forage as ectoparasites on these trees. In all, 14 spp. of trees [Vochysia pyramidalis, V. tucanorum, V. tomentosa, Callisthene major, Tapirira guianensis, Byrsonima linguistifolia, Qualea dichotoma, Hirtella grisilipes, Salacia elliptica, Richardia sp., Belangera sp.] were parasitized by the marmosets; almost all activity was concentrated on V. pyramidalis, C. major and T. guianensis. Marmosets foraged more on larger trees near the center of the gallery forest. Although Callisthene was utilized in a somewhat different fashion than the other 2 spp., there was no strong difference in preference among the 3 important species. The exudate sources were distributed regularly among the gallery forest.

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