1. Socio-sexual factors of troop fission in wild Japanese monkeys (Macaca fuscata yakui) on Yakushima Island, Japan

   • Juichi Yamagiwa

   OriginalPaper Pages: 105 - 120

2. Female life history and mating patterns among the M group chimpanzees of the Mahale national park, Tanzania

   • Hiroyuki Takasaki

   OriginalPaper Pages: 121 - 129

3. Reproductive patterns in mantled howler monkeys: Estrus, mate choice and copulation

   • Clara B. Jones

   OriginalPaper Pages: 130 - 142

4. A behavioral profile for stumptail macaques (Macaca arctoides)

   • Robert T. O'Keeffe
   • Kenneth Lifshitz

   OriginalPaper Pages: 143 - 160

5. New record of predatory behavior by the mandrill in Cameroon

   • Hiroko Kudo
   • Masazumi Mitani

   OriginalPaper Pages: 161 - 167

6. The acquisition of stone-tool use in captive chimpanzees

   • Kyoko Sumita
   • Jean Kitahara-Frisch
   • Kohshi Norikoshi

   OriginalPaper Pages: 168 - 181

7. Comparison of object manipulation among 74 species of non-human primates

   • Takashi Torigoe

   OriginalPaper Pages: 182 - 194

8. Differences in male-female interaction betweenLemur fulvus andL. macaco

   • L. Koenders
   • Y. Rumpler
   • P. Ropartz

   OriginalPaper Pages: 195 - 201

9. A review of attempts to condition operantly alloprimate vocalizations

   • John D. Pierce Jr.

   ReviewPaper Pages: 202 - 213

10. Book reviews

    • Toshisada Nishida
    • Juichi Yamagiwa

    BookReview Pages: 214 - 217