How fruit abundance affects the chimpanzee party size: a comparison between four study sites Chie HashimotoShigeru SuzukiTakeshi Furuichi Original Article 18 February 2003 Pages: 77 - 81
Seasonal variation in association patterns of wild spider monkeys (Ateles belzebuth belzebuth) at La Macarena, Colombia Yukiko Shimooka Original Article 19 February 2003 Pages: 83 - 90
Mother–infant relationships and maternal estrogen metabolites changes in macaques (Macaca fuscata, M. mulatta) Massimo BardiKeiko ShimizuSilvana M. Borgognini-Tarli Original Article 18 February 2003 Pages: 91 - 98
Long-term study of the social dynamics of patas monkeys (Erythrocebus patas): group male supplanting and changes to the multi-male situation Hideyuki Ohsawa Original Article 26 February 2003 Pages: 99 - 107
Birth-season variation in Japanese macaques, Macaca fuscata Jack FoodenMitsuru Aimi Original Article 20 February 2003 Pages: 109 - 117
Life history of male Japanese macaques living on Koshima Islet Akio MoriKunio Watanabe Original Article 19 February 2003 Pages: 119 - 126
Scaling of lumbar vertebrae in anthropoids and implications for evolution of the hominoid axial skeleton Masato NakatsukasaYouichi Hirose Original Article 19 February 2003 Pages: 127 - 135
Endocranial cast and morphology of the olfactory bulb of Amphipithecus mogaungensis (latest middle Eocene of Myanmar) Masanaru TakaiNobuo ShigeharaTakehisa Tsubamoto Original Article 14 February 2003 Pages: 137 - 144
Extraordinarily low bone mineral density in an old female chimpanzee (Pan troglodytes schweinfurthii) from the Mahale Mountains National Park Harumoto GunjiKazuhiko HosakaToshisada Nishida Original Article 14 February 2003 Pages: 145 - 149
Bone mineral density in chimpanzees, humans, and Japanese macaques Yasuhiro KikuchiToshifumi UdonoYuzuru Hamada Original Article 13 February 2003 Pages: 151 - 155
Visual preference by chimpanzees (Pan troglodytes) for photos of primates measured by a free choice-order task: implication for influence of social experience Masayuki Tanaka Original Article 22 February 2003 Pages: 157 - 165
Levels of serum brain-derived neurotrophic factor in primates Takuma MoriKeiko ShimizuMotoharu Hayashi Original Article 19 February 2003 Pages: 167 - 169
Behavioral evidence of color vision deficiency in a protanomalia chimpanzee (Pan troglodytes) Atsuko SaitoAkichika MikamiYuusuke Mori Original Article 27 February 2003 Pages: 171 - 176
Perception of shape-from-motion in macaque monkeys and humans Shumpei UnnoReiko KunoAkichika Mikami Original Article 19 February 2003 Pages: 177 - 182
Comparative study of urinary reproductive hormones in great apes Keiko ShimizuToshifumi UdonoOsamu Takenaka Original Article 14 February 2003 Pages: 183 - 190
A model of the biogeographical journey from Proto-pan to Pan paniscus Jo A. Myers Thompson Review Article 18 February 2003 Pages: 191 - 197
A case report of a novel type of stick use by wild chimpanzees Takeshi NishimuraNaobi OkayasuJuichi Yamagiwa Short Communication 13 February 2003 Pages: 199 - 201