@article {1589,
	title = {Tropical rain forest fragmentation, Howler monkeys (Alouatta palliata), and dung beetles at Los Tuxtlas, Mexico},
	journal = {American Journal of Primatology},
	volume = {48},
	number = {4},
	year = {1999},
	note = {Using Smart Source ParsingArticleEnglish},
	pages = {253-262},
	abstract = {In Neotropical rain forests, fresh mammal dung, especially that of howler monkeys, constitutes an important resource used by dung beetles as food and for oviposition and further feeding by their larvae. Tropical rain forest destruction, fragmentation, and subsequent isolation causing reductions in numbers of and the disappearance of howler moneys may result in decreasing numbers of dung beetles, but this has not been documented. In this study, we present information on the presence of howlers and dung beetles in 38 isolated forest fragments and 15 agricultural habitats. Howler monkeys were censused by visual means, while dung beetles were sampled with traps baited with a mixture of howler, cow, horse, and dog dung. Results indicated that loss of area and isolation of forest fragments result in significant decrements in howlers and dung beetles. However, dung beetle abundance was found to be closely related to the presence of howler monkeys at the sites and habitats investigated. Scenarios of land management designed to reduce isolation among forest fragments may help sustain populations of howler monkeys and dung beetles, which may have positive consequences for rain forest regeneration.},
	keywords = {Alouatta-palliata [howler-mo, Animalia-, Arthropoda-, Cebidae-: Primates-, Chordata-, Coleoptera-: Insecta-, Conservation-, dung-beetle (Coleoptera-), Environmental-Sciences), Invertebrata-, Mammalia-, Terrestrial-Ecology (Ecology-, Vertebrata-},
	author = {Estrada, Alejandro and Anzures D. , A. and Coates-Estrada, Rosamond}
}
@article {1591,
	title = {Howler Monkeys Alouatta-Palliata Dung Beetles Scarabaeidae and Seed Dispersal Ecological Interactions in the Tropical Rain Forest of Los Tuxtlas Mexico},
	journal = {Journal of Tropical Ecology},
	volume = {7},
	number = {4},
	year = {1991},
	note = {Using Smart Source ParsingArticleEnglish},
	pages = {459-474},
	abstract = {The dispersal of seeds by howler monkeys (Alouatta palliata) and the activity of dung beetles in modulating the fate of the dispersed seed were studied at Los Tuxtlas, Mexico. Howlers consumed the fruits of 35 species of plants. The seeds of 28 of these were dispersed by the monkeys. The majority (.gtoreq. 90\%) of the seeds dispersed by monkeys were destroyed by rodents. Rapid relocation and burial of dung by dung beetles resulted in accidental relocation and burial of large number of seeds shortly after deposition. Faecal clumps (20 mg) remained on the ground for an average of only 2.5 h (range 1-3 h). Ball rolling beetles transported balls up to 5.0 m from the site of deposition (range 1-5 m). Burrowing and ball-rolling dung beetles buried seeds at depths ranging from 2.5 to > 12.0 cm. The deeper a seed is buried, the less likely it is to be found and eaten by rodents. Eighty percent of the species used by Alouatta as sources of fruit at Los Tuxtlas benefited by the dispersal and post dispersal service provided by howlers and dung beetles respectively. Seasonality in dung beetles abundance in the forest may influence the number of seeds per species escaping post-dispersal predation during the year. Dung beetles play not only an important ecological role in the recycling of matter and energy in the ecosystem, but also in the process of rain forest regeneration.},
	keywords = {Animalia-, Animals-, Arthropoda-, Arthropods-, Cebidae-: Primates-, Chordata-, Chordates-, Coleoptera-: Insecta-, Insects-, Invertebrata-, Invertebrates-, Mammalia-, Mammals-, Nonhuman-Mammals, Nonhuman-Primates, Nonhuman-Vertebrat, Vertebrata-},
	author = {Estrada, Alejandro and Coates-Estrada, Rosamond}
}
