Vol. 41 No. 1, January 2000

Stallmann, Robert R.; Froehlich, Jeffery W.: Primate Sexual Swellings as Coevolved Signal Systems..........1
Key Words: Sexual swellings; Sexual conflict; Sexual selection; Mate choice; Multiple mating.

Vasey, Paul L.; Gauthier, Carole: Skewed Sex Ratios and Female Homosexual Activity in Japanese Macaques: An Experimental Analysis..........17
Key Words: Japanese macaques; Homosexual behavior; Sex ratios.

Passamani, Marcelo; Rylands, Anthony B.: Feeding Behavior of Geoffroy's Marmoset ( Callithrix geoffroyi) in an Atlantic Forest Fragment of South-eastern Brazil..........27
Key Words: Callithrix geoffroyi; Geoffroy's Marmoset; Diet; Feeding ecology; Atlantic forest.

Torii, Ryuzo; Hosoi, Yoshihiko; Masuda, Yoshiyuki; Iritani, Akira; Nigi, Hideo: Birth of the Japanese Monkey ( Macaca fuscata) Infant Following In-vitro Fertilization and Embryo Transfer..........39
Key Words: IVF(in-vitro fertilization); ET(embryo transfer); Japanese monkey.

Signer, E. N.; Anzenberger, G.; Jeffreys, A. J.: Chimaeric and Constitutive DNA Fingerprints in the Common Marmoset ( Callithrix jacchus)..........49
Key Words: DNA fingerprinting; Marmosets; Blood chimaerism; Constitutive DNA.

Brown, Gillian R.; Dixson, Alan F.: The Development of Behavioural Sex Differences in Infant Rhesus Macaques ( Macaca mulatta)..........63
Key Words: Sex differences; Infant development; Rhesus macaques.

Ljungberg, Tomas; Westlund, Karolina: Impaired Reconciliation in Rhesus Macaques with a History of Early Weaning and Disturbed Socialization..........79
Key Words: Rhesus macaques; Aggresive behaviors; Reconciliation; Early separation; Social behaviours.

Short Communications

Sankar, Venkatachalam; Prakash, Seppan; Muthusamy, Rathinasamy; Kamakshi, Krishnaswami: Dracunculiasis in a South Indian Bonnet Monkey..........89
Key Words: Dracunculiasis ; Guinea worm disperse; Parasites; Bonnet monkey; Macaca radiata.

Sicotte, Pascale: A Case Study of Mother-son Transfer in Mountain Gorillas..........93
Key Words: Gorilla g.Beringei; Female transfer; Infanticide; Male immigration; Post-transfer aggression; Stranger fear.

Hashimoto, Chie; Furuichi, Takeshi; Tashiro, Yasuko: New Evidence of Ant Dipping Using Wands and Meat Eating by Wild Chimpanzees in the Kalinzu Forest, Uganda..........103
Key Words: Pan troglodytes; Tool use; Ant dipping; Meat eating; Culture.

Vervaecke, Hilde; Van Elsacker, Linda: Sexual Competition in a Group of Captive Bonobos ( Pan paniscus)..........109
Key Words: Harassment; Sexual interactions; Bonobo; Pan paniscus.

Book Review..........117