Timing of Birth, Female Reproductive Success and Infant Sex Ratio in Semifree-Ranging Barbary Macaques (Macaca sylvanus)

1984 ◽  
Vol 42 (1) ◽  
pp. 2-16 ◽  
Author(s):  
Andreas Paul ◽  
Dieter Thommen
Keyword(s):  
Reproductive Success ◽  
Sex Ratio ◽  
Macaca Sylvanus ◽  
Female Reproductive Success ◽  
Barbary Macaques ◽  
Infant Sex

The association between rank, mating effort, and reproductive success in male Barbary macaques (Macaca sylvanus)

Primates ◽  
1993 ◽  
Vol 34 (4) ◽  
pp. 491-502 ◽  
Author(s):  
Andreas Paul ◽  
Jutta Kuester ◽  
Angelika Timme ◽  
Joachim Arnemann
Keyword(s):  
Reproductive Success ◽  
Mating Effort ◽  
Macaca Sylvanus ◽  
Barbary Macaques

scholarly journals The Function of Mounts in Free-Ranging Barbary Macaques (Macaca sylvanus)

2021 ◽  
Author(s):  
Simone Anzá ◽  
Bonaventura Majolo ◽  
Federica Amici
Keyword(s):  
Social Relationships ◽  
Sexual Behaviors ◽  
Agonistic Behavior ◽  
Social Bond ◽  
Macaca Sylvanus ◽  
Barbary Macaques ◽  
The Social ◽  
Rank Difference ◽  
Free Ranging ◽  
The Relationship

AbstractGenerally, nonreproductive sex is thought to act as “social grease,” facilitating peaceful coexistence between subjects that lack close genetic ties. However, specifc nonreproductive sexual behaviors may fulfill different functions. With this study, we aimed to test whether nonreproductive mounts in Barbary macaques are used to 1) assert dominance, 2) reinforce social relationships, and/or 3) solve conflicts. We analyzed nonreproductive mounts (N = 236) and postmount behavior in both aggressive and nonaggressive contexts, in 118 individuals belonging to two semi-free-ranging groups at La Montagne des Singes (France). As predicted by the dominance assertion hypothesis, the probability to be the mounter increased with rank difference, especially in aggressive contexts (increasing from 0.066 to 0.797 in nonaggressive contexts, and from 0.011 to 0.969 in aggressive contexts, when the rank difference was minimal vs. maximal). The strength of the social bond did not significantly predict the proportion of mounts across dyads in nonaggressive contexts, providing no support for the relationship reinforcement hypothesis. Finally, in support of the conflict resolution hypothesis, when individuals engaged in postconflict mounts, 1) the probability of being involved in further aggression decreased from 0.825 to 0.517, while 2) the probability of being involved in grooming interactions with each other increased from 0.119 to 0.606. The strength of the social bond between former opponents had no significant effect on grooming occurrence and agonistic behavior after postconflict mounts. Overall, our findings suggest that nonreproductive mounts in Barbary macaques have different functions that are not affected by the strength of the social bond.

Significance of wounding to female reproductive success in Hawaiian monk seals (Monachus schauinslandi) at Laysan Island

1993 ◽  
Vol 71 (3) ◽  
pp. 469-474 ◽  
Author(s):  
Lisa M. Hiruki ◽  
Ian Stirling ◽  
William G. Gilmartin ◽  
Thea C. Johanos ◽  
Brenda L. Becker
Keyword(s):  
Reproductive Success ◽  
Adult Male ◽  
Reproductive Rate ◽  
Lactation Period ◽  
Female Reproductive Success ◽  
Monachus Schauinslandi ◽  
Lower Survival Rate ◽  
Adult Females ◽  
Pup Survival ◽  
Monk Seals

We studied reproductive rate, length of lactation period, pup survival, and mortality of injured and uninjured female Hawaiian monk seals (Monachus schauinslandi) on Laysan Island, northwestern Hawaiian Islands, in 1983 – 1989. The severity and timing of nonfatal injuries were influential in determining their effect on female reproductive success. There was a tendency towards a shorter mean lactation period and lower survival rate of pups for females with major injuries than for uninjured females. Females with minor injuries were similar to uninjured females in terms of reproductive rate, length of lactation, and pup survival. For females injured shortly before the birth of their pup or during lactation, pup survival was lower than for uninjured females, whereas for females injured during the year prior to pupping, measures of reproductive success were not significantly different from those for uninjured females. Immature (aged 4 – 8 years) females entering the reproductive population were injured by adult male seals significantly more often than females aged 0 – 3 years, but at a similar rate to adult females. The major effect of injuries on female reproductive success is an increase in female mortality: 87.5 % of the adult females (n = 16) that died on Laysan Island in 1983 – 1989 sustained injuries from adult male seals.

Female reproductive success in a species with an age-inversed hierarchy

2016 ◽  
Vol 11 (6) ◽  
pp. 433-446 ◽  
Author(s):  
Dorien DE VRIES ◽  
Andreas KOENIG ◽  
Carola BORRIES
Keyword(s):  
Reproductive Success ◽  
Female Reproductive Success
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