Vol. 42 No. 4, October 2001

Brun, B.; Djlelati, R.; Rumpler, Y.; Koehl, C.; Fabre, M.: Seasonal Ultrastructural Modifications of the Seminiferous Epithelium in Two Eulemur species: E. fulvus and E. macaco ..........281 Key Words: Eulemur ; Reproductive activity; Spermatogenesis; Seasonal variations.

Miyamoto, Sachiko; Chen, Yang; Kurotori, Hidetoshi; Sankai, Tadashi; Yoshida, Takashi; Machida, Takeo: Monitoring the Reproductive Status of Female Gorillas (Gorilla gorilla gorilla) by Measuring the Steroid Hormones in Fecal Samples ..........291 Key Words: Female reproductive status; Gorilla gorilla gorilla ; Fecal steroid; Estradiol-17ß; Progesterone.

Grunau, Thalia; Kuester, Jutta: Dominance Style in Female Guerezas (Colobus guereza Rüppell 1835)..........301 Key Words: Colobus guereza ; Colobinae; Female relations; Dominance style; Rank relations; Egalitarian relationships.

Stanford, Craig B.: The Subspecies Concept in Primatology: The Case of Mountain Gorillas ..........309 Key Words: Gorilla gorilla ; Taxonomy; Subspecies; Ecology; Genatics; Bwindi.

Stoinski, Tara S.; Beck, Benjamin B.: Spontaneous Tool Use in Captive, Free-ranging Golden Lion Tamarins (Leontopithecus rosalia rosalia) ..........319 Key Words: Callitrichidae; Tool use; Social transmission; Environmental complexity; Extractive foraging.

Voros, J.; Mahaney, W. C.; Milner, M. W.; Krishnamani, R.; Aufreiter, S.; Hancock, R. G. V.: Geophagy by the Bonnet Macaques (Macaca radiata) of Southern India: A Preliminary Analysis ..........327 Key Words: Geophagy; Soil consumption; Primates; Bonnet macaques; Macaca radiata.

Elder, Christopher M.; Menzel, Charles R.: Dissociation of Cortisol and Behavioral Indicators of Stress in an Orangutan (Pongo pygmaeus) during a Computerized Task ..........345 Key Words: Cortisol; Behavior; Stress; Computer; Primate; Orangutan.

Sakamaki, Tetsuya; Itoh, Noriko; Nishida, Toshisada: An Attempted Within-group Infanticide in Wild Chimpanzees ..........359 Key Words: Chimpanzee; Infanticide; Sexual selection; Intervention; Female coalition; Mahale Mountains.

Yoshida, Takashi; Matsumuro, Mie; Miyamoto, Sachiko; Muroyama, Yasuyuki; Tashiro, Yasuko; Takenoshita, Yuji; Sankai, Tadashi: Monitoring the Reproductive Status of Japanese Monkeys (Macaca fuscata) by Measurement of the Steroid Hormones in Fecal Samples ..........367 Key Words: Menstrual cycle; Pregnancy; Fecal steroid; Japanese monkey.

Moro, Makoto; Torii, Ryuzo; Ishii, Hajime; Tanioka, Yoshikuni; Inada, Yoichi; Kojima, Masami; Tsujii, Hirotada: Novel Hyperprolactinemia and Hyperprolactinemic Anovulation Model Using the Cynomolgus Monkeys (Macaca fascicularis) ..........375 Key Words: Hyperprolactinemia; Anovulation; Laparoscopy; Cynomolgus monkey.

Short Communications

Poulsen, John R.; Clark, Connie J.: Predation on Mammals by the Grey-cheeked Mangabey Lophocebus albigena ..........391 Key Words: Lephocebus albigena; Predation; Carnivory; Mangabeys; Cameroon.

Guimarães, Vanessa da Oliveira; Strier, Karen B.: Adult Male-infant Interactions in Wild Muriquis (Brachyteles arachnoides hypoxanthus) .........395 Key Words: Muriquis; Brachyteles arachnoides hypoxanthus; Male-infant interactions; Male philipatry; Paternity uncertainty.

Research Report

Srivastava, Arun; Das, Jayanta; Biswas, Jihosuo; Buzarbarua, Pranab; Sarkar, Prabal; Bernstein, Irwin S.; Mohnot, Surendra Mal: Primate Population Decline in Response to Habitat Loss: Borajan Reserve Forest of Assam, India .........401 Key Words: Conservation; Assam; India; Primates; Forest degradation.

Book Reviews ..........407

Note ..........411

Cumulative Contents, Author Index, Scientific Name Index, and Subject Index for Volume 42 (2001) ..........413