1. What I learned throughout behavioral observations on Japanese macaques

   • Masayuki Nakamichi

   Editorial 17 February 2021 Pages: 243 - 251

   

2. Population history of chimpanzees introduced to Lake Victoria’s Rubondo Island

   • Josephine N. Msindai
   • Christian Roos
   • Volker Sommer

   Original Article 02 February 2021 Pages: 253 - 265

   

3. Hunting of mammals by central chimpanzees (Pan troglodytes troglodytes) in the Loango National Park, Gabon

   • Harmonie Klein
   • Gaëlle Bocksberger
   • Tobias Deschner

   Original Article Open access 08 January 2021 Pages: 267 - 278

   

4. Female chimpanzees giving first birth in their natal group in Mahale: attention to incest between brothers and sisters

   • Takuya Matsumoto
   • Shunkichi Hanamura
   • Eiji Inoue

   Original Article 14 January 2021 Pages: 279 - 287

   

5. Stability of chimpanzee (Pan troglodytes) urinary reproductive hormones during long-term preservation on filter paper

   • Keiko Mouri
   • Keiko Shimizu

   Original Article 21 September 2020 Pages: 289 - 296

   

6. Human caregivers are integrated social partners for captive chimpanzees

   • Jake A. Funkhouser
   • Jessica A. Mayhew
   • Lori K. Sheeran

   Original Article 09 October 2020 Pages: 297 - 309

   

7. Daily defecation outputs of mountain gorillas (Gorilla beringei beringei) in the Volcanoes National Park, Rwanda

   • Elie Sinayitutse
   • David Modry
   • Winnie Eckardt

   Original Article 22 November 2020 Pages: 311 - 320

   

8. Apes in fiction: does the content of novels reflect primatological knowledge?

   • William C. McGrew

   Original Article 04 February 2021 Pages: 321 - 330

9. Resource partitioning and niche overlap between hoolock gibbon (Hoolock hoolock) and other frugivorous vertebrates in a tropical semi-evergreen forest

   • Sufia Akter Neha
   • Ummay Habiba Khatun
   • Md. Ashraf Ul Hasan

   Original Article 03 February 2021 Pages: 331 - 342

   

10. A comparative assessment of external morphological traits between Macaca munzala, Tawang and Macaca assamensis, Goalpara population in Northeast India

    • Bidyut Sarania
    • Awadhesh Kumar
    • Ashalata Devi

    Original Article 11 November 2020 Pages: 343 - 360

    

11. Seed choice differs by sex in sooty mangabeys (Cercocebus atys)

    • Elise Geissler
    • David J. Daegling
    • W. Scott McGraw

    Original Article 22 September 2020 Pages: 361 - 367

    

12. Effect of bFGF on fibroblasts derived from the golden snub-nosed monkey

    • Xin Liu
    • Hao Wei
    • Baoguo Li

    Original Article 19 November 2020 Pages: 369 - 378

    

13. Maternal care according to offspring sex and maternal physical condition in mantled howler monkeys (Alouatta palliata)

    • Amalia de la Torre
    • Alejandro Coyohua Fuentes
    • Pedro Américo D. Dias

    Original Article 01 February 2021 Pages: 379 - 388

    

14. Taste detection threshold of human (Homo sapiens) subjects and taste preference threshold of black-handed spider monkeys (Ateles geoffroyi) for the sugar substitute isomalt

    • Sofia Pereira
    • Laura Teresa Hernandez Salazar
    • Matthias Laska

    Original Article Open access 03 October 2020 Pages: 389 - 394

    

15. Genetic analysis of an insular population of Sapajus nigritus (Primates: Cebidae) in Rio de Janeiro state, Brazil

    • Diego Mattos Penedo
    • Jorge Luís Azevedo de Armada
    • Denise Monnerat Nogueira

    Original Article 18 January 2021 Pages: 395 - 406

    

16. On the way to systematize habituation: a protocol to minimize the effects of observer presence on wild groups of Leontocebus lagonotus

    • Sara Vicente-Alonso
    • Lidia Sánchez-Sánchez
    • Sara Álvarez Solas

    Original Article 11 January 2021 Pages: 407 - 415

    

17. Agonistic vocalization behaviour in the male ring-tailed lemur (Lemur catta)

    • Laura M. Bolt

    Original Article 18 January 2021 Pages: 417 - 430

    

18. Intraspecific macroscopic digestive anatomy of ring-tailed lemurs (Lemur catta), including a comparison of frozen and formalin-stored specimens

    • Marcus Clauss
    • Jelscha Trümpler
    • Ikki Matsuda

    Original Article Open access 12 November 2020 Pages: 431 - 441

    

19. Chimpanzee culture wars: rethinking human nature alongside Japanese, European, and American cultural primatologists, by Nicolas Langlitz

    • William C. McGrew

    Book Review 09 February 2021 Pages: 443 - 444