NDLI: Sexual behavior of adult male chimpanzees of the Mahale Mountains national park, Tanzania

Please wait, while we are loading the content...

Sexual behavior of adult male chimpanzees of the Mahale Mountains national park, Tanzania

Content Provider	Springer Nature Link
Author	Nishida, Toshisada
Copyright Year	1997
Abstract	This study, based on 687 hr of focal observations, aims to describe overall patterns of the sexual behavior of the adult male chimpanzees of the Mahale Mountains, to compare the results with previous reports, and to explain the variations between studies. Genital inspection of cycling females by adult males was eight times as frequent as that of lactating females, and twice as frequent as that of pregnant females. Inspection of the genitals of cycling females increased dramatically 7–10 days before the onset of maximal swelling and gradually decreased as the day of ovulation approached. Adult males likely obtained information on the attractivity of females by inspecting their genitals. Mating was usually initiated by male courtship and followed by pelvic thrusts in a dorsoventral posture, performed on, rather than above, the ground, which continued for 7 s. on average, and was typically followed by female squeaking and darting from the male, or by the male grooming the female. Higher-ranking males mated with females in the peri-ovulatory period more frequently than did lower-ranking males. In particular, two alpha males mated with such females more often than did any other adult males. A male who interfered with a mating pair was dominant over the mating male in other agonistic contexts. The duration of intromission was correlated with neither dominance rank nor age. However, when an adult male declined in rank from alpha in 1991 to third in 1992, he showed a significantly shorter duration of intromission. This indicates that for a particular male, the alpha rank guaranteed longer duration of intromission. Allies of alpha males tended to mate with peri-ovulatory females more frequently than expected from their low dominance ranks. The number of mating partners was not correlated with male dominance rank, but was sometimes negatively correlated with male age. Females were significantly more likely to emit a copulatory squeak when mating with younger, rather than older, adult males. Male dominance rank and the rate of female copulatory squeaking were not correlated. Weaning infants regularly interfered with their mothers' mating. Occasionally, unrelated adolescent males and rarely females pushed themselves in between copulating adults. Female choice was indicated when they performed a “penis erection check” or took the initiative in courtship, or on the other hand showed strong reluctance to mate with particular males. Young adult males more often received erection checks than did prime males, while none of the three old adult males did. Courtship initiated by estrous females was not directed to two of the oldest males, the exception of which was the alpha male. The oldest males, except for the alpha, were consistently avoided by many estrous females, both young and old. In response to female reluctance, males behaved violently, however, this was not effective, because other more dominant males came to rescue the female. Neither courtship nor mating was seen between mature sons and their mothers, nor between brothers and sisters.
Starting Page	379
Ending Page	398
Page Count	20
File Format	PDF
ISSN	00328332
Journal	Primates
Volume Number	38
Issue Number	4
e-ISSN	16107365
Language	English
Publisher	Springer-Verlag
Publisher Date	1997-01-01
Publisher Place	Tokyo
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Sexual behavior Chimpanzee Genital inspection Mating Female choice Behavioural Sciences Animal Ecology Evolutionary Biology Zoology
Content Type	Text
Resource Type	Article
Subject	Animal Science and Zoology

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Prevalence of muzzle-rubbing and hand-rubbing behavior in wild chimpanzees in Mahale Mountains National Park, Tanzania

Group unity of chimpanzees elucidated by comparison of sex differences in short-range interactions in Mahale Mountains National Park, Tanzania

Natural history of Camponotus ant-fishing by the M group chimpanzees at the Mahale Mountains National Park, Tanzania

Dynamics of the temporal structures of playing clusters and cliques among wild chimpanzees in Mahale Mountains National Park

Responses of wild chimpanzees (Pan troglodytes schweinfurthii) toward seismic aftershocks in the Mahale Mountains National Park, Tanzania

Parasitology of five primates in Mahale Mountains National Park, Tanzania

An attempted within-group infanticide in wild chimpanzees

Chimpanzee grouping patterns and food availability in Mahale Mountains National Park, Tanzania

Wild chimpanzees can perform social grooming and social play behaviors simultaneously

Sexual behavior of adult male chimpanzees of the Mahale Mountains national park, Tanzania

Similar Documents

Prevalence of muzzle-rubbing and hand-rubbing behavior in wild chimpanzees in Mahale Mountains National Park, Tanzania

Group unity of chimpanzees elucidated by comparison of sex differences in short-range interactions in Mahale Mountains National Park, Tanzania

Natural history of Camponotus ant-fishing by the M group chimpanzees at the Mahale Mountains National Park, Tanzania

Dynamics of the temporal structures of playing clusters and cliques among wild chimpanzees in Mahale Mountains National Park

Responses of wild chimpanzees (Pan troglodytes schweinfurthii) toward seismic aftershocks in the Mahale Mountains National Park, Tanzania

Parasitology of five primates in Mahale Mountains National Park, Tanzania

An attempted within-group infanticide in wild chimpanzees

Chimpanzee grouping patterns and food availability in Mahale Mountains National Park, Tanzania

Wild chimpanzees can perform social grooming and social play behaviors simultaneously

Sexual behavior of adult male chimpanzees of the Mahale Mountains national park, Tanzania