Abundance and Distribution of Sympatric Gibbons in a Threatened Sumatran Rain Forest Timothy G. O'BrienMargaret F. KinnairdMohamed Rusmanto OriginalPaper Pages: 267 - 284
Densities, Distributions, and Seasonal Movements of Gorillas and Chimpanzees in Swamp Forest in Northern Congo John R. PoulsenConnie J. Clark OriginalPaper Pages: 285 - 306
Distribution, Population Structure and Habitat Use of Microcebus berthae Compared to Those of Other Sympatric Cheirogalids Dorothea SchwabJörg U. Ganzhorn OriginalPaper Pages: 307 - 330
Elevational Ranges of Lemurs in the Humid Forests of Madagascar Steven M. GoodmanJörg U. Ganzhorn OriginalPaper Pages: 331 - 350
Population Sizes and Distribution of Primates in the Lower Tana River Forests, Kenya G. M. KarereN. O. OgugeM. A. Suleman OriginalPaper Pages: 351 - 365
Fruit Choice by Woolly Monkeys in Tinigua National Park, Colombia Pablo R. Stevenson OriginalPaper Pages: 367 - 381
Birth Seasonality in Alouatta caraya in Northern Argentina M. KowalewskiG. E. Zunino OriginalPaper Pages: 383 - 400
Factors Affecting Reproduction and Mortality Among Baboons in the Okavango Delta, Botswana D. L. CheneyR. M. SeyfarthJ. B. Silk OriginalPaper Pages: 401 - 428
Juveniles Outrank Higher-Born Females in Groups of Long-Tailed Macaques with Minimal Kinship Bernard ChapaisCarole Gauthier OriginalPaper Pages: 429 - 447
Urinary Progestogen and Estrogen Excretion During Pregnancy in Eulemur macaco flavifrons, E. rubriventer, and Hapalemur griseus occidentalis Patricia GerberPierre MoissonMichael Heistermann OriginalPaper Pages: 449 - 463
Antiphonal Responses to Loud Contact Calls Produced by Saguinus oedipus Kerry JordanDaniel WeissBob McMurray OriginalPaper Pages: 465 - 475
Female Genito-genital Rubbing in a Group of Captive Chimpanzees Stephanie Firos Anestis OriginalPaper Pages: 477 - 488
Effect of Removal from the Family Group on Feeding Behavior by Captive Callithrix jacchus Maria Emília YamamotoFívia de Araújo Lopes OriginalPaper Pages: 489 - 500
Book Review: Intelligence of Apes and Other Rational Beings. By Duane M. Rumbaugh and David A. Washburn; Yale University Press, New Haven, CT. xvii + 326 pp., 2003, US$35.00 (hardback) Benjamin B. Beck BookReview Pages: 501 - 503