Sexual coercion and courtship by male western gorillas
@article{Breuer2015SexualCA, title={Sexual coercion and courtship by male western gorillas}, author={Thomas Breuer and Andrew M. Robbins and Martha M. Robbins}, journal={Primates}, year={2015}, volume={57}, pages={29-38} }
Sexual coercion and courtship are possible explanations for why male primates may direct agonistic behavior towards females. If so, then in species where females exhibit mate choice by transferring between males: (a) females who are not lactating (potential migrants) should receive more agonistic behavior than other females, (b) males should exhibit more agonistic behavior towards females during intergroup encounters than when no rival males are nearby, and (c) males should show more herding…
13 Citations
Intersexual conflict influences female reproductive success in a female-dispersing primate
- BiologyBehavioral Ecology and Sociobiology
- 2019
It is found that females are faced with the dilemma of staying with a silverback at the end of his tenure and risk higher infant mortality versus dispersing and suffering reproductive delays and lower birth rates, showing that female reproductive strategies, namely dispersal, used to counter the effects of sexual coercion by males are not sufficient to overcome the negative consequences of male behavior.
Female dispersal patterns influenced by male tenure duration and group size in western lowland gorillas
- BiologyBehavioral Ecology and Sociobiology
- 2020
It is found that the duration of male tenure and the size of the group influences female transfer decisions, and secondary dispersal by females is a rare behavior, believed to be a counterstrategy against sexual coercion by males, reduces feeding competition, assists in predator avoidance, and facilitates mate choice.
No evidence for female kin association, indications for extragroup paternity, and sex‐biased dispersal patterns in wild western gorillas
- Biology, PsychologyEcology and evolution
- 2021
This study on habituated western gorillas shed light on the dispersal dynamics and reproductive behavior of this polygynous species and challenge some of the previous results based on unhabituated groups.
Infant survival in western lowland gorillas after voluntary dispersal by pregnant females
- BiologyPrimates
- 2020
These observations are the first to show that wild female western lowland gorillas can transfer voluntarily while pregnant without incurring infanticide by a new silverback, and highlight the behavioural plasticity shown by female gorillas in response to sexual coercion by males.
The context of sexual coercion in orang-utans: when do male and female mating interests collide?
- BiologyAnimal Behaviour
- 2021
Neither kin selection nor familiarity explain affiliative biases towards maternal siblings in wild mountain gorillas
- PsychologybioRxiv
- 2022
Evolutionary theories predict that sibling relationships will reflect a complex balance of cooperative and competitive dynamics. In most mammals, dispersal and death patterns mean that sibling…
Adult–adult play in captive lowland gorillas (Gorilla gorilla gorilla)
- PsychologyPrimates; journal of primatology
- 2022
It is likely that under particular physiological or socio-ecological conditions, adult-adult play may be manifested as an "unconventional" part of gorilla social behaviour.
Variation between species, populations, groups and individuals in the fitness consequences of out-group conflict
- PsychologyPhilosophical Transactions of the Royal Society B
- 2022
Out-group conflict is rife in the natural world, occurring from primates to ants. Traditionally, research on this aspect of sociality has focused on the interactions between groups and their…
Variation in the social organization of gorillas: Life history and socioecological perspectives
- Environmental ScienceEvolutionary anthropology
- 2018
Five ultimate causes for the variability in social organization within and among gorilla populations are reviewed: human disturbance, ecological constraints on group size, risk of infanticide, life history patterns, and population density.
Intraspecific gestural laterality in chimpanzees and gorillas and the impact of social propensities
- Biology, PsychologyBrain Research
- 2017
References
SHOWING 1-10 OF 82 REFERENCES
The function of male aggressive displays towards females in mountain gorillas
- Psychology, BiologyPrimates
- 2007
There was an association between female appeasement reactions and male displays, which suggests that males display to create occasions for the females to confirm their subordinance to them, suggesting that male displays are not a form of courtship aggression aimed at influencing mating in the short term.
Sexual conflict in a polygynous primate: costs and benefits of a male-imposed mating system
- BiologyBehavioral Ecology and Sociobiology
- 2013
Benefits to males and costs to females of female defense polygyny in wild hamadryas baboons, cercopithecoid primates in which females are coercively transferred among social units by males are demonstrated, revealing that takeovers increase the chance of infant mortality while delaying subsequent conception.
Male Takeovers Are Reproductively Costly to Females in Hamadryas Baboons: A Test of the Sexual Coercion Hypothesis
- BiologyPloS one
- 2014
It is suggested that the male’s aggressive herding is the main contributor to the abducted females’ immediate reproductive cost, as they are associated with an increase in the time they take to conceive and a lengthening of the inter-birth intervals.
Immigration costs for female chimpanzees and male protection as an immigrant counterstrategy to intrasexual aggression
- Psychology, BiologyAnimal Behaviour
- 2008
Sexual coercion in animal societies
- SociologyAnimal Behaviour
- 1995
Abstract In a wide range of animal species, males coerce females to mate with them, either by physically forcing them to mate, by harassing them until they mate or by punishing persistent refusal to…
Male coercion and the costs of promiscuous mating for female chimpanzees
- Biology, PsychologyProceedings of the Royal Society B: Biological Sciences
- 2007
It is shown that male aggression is targeted towards the most fecund females, is associated with high male mating success and is costly for the victims, and sexual coercion is the probable primary function of male aggression against females.
The Function of Male Agonistic Displays in Ursine Colobus Monkeys (Colobus vellerosus): Male Competition, Female Mate Choice or Sexual Coercion?
- Biology, Psychology
- 2010
The male–male competition hypothesis received the greatest support, with some support for the female mate choice hypothesis, and behaviours that appeared sexually coercive were observed, but the function of male displays did not seem to be sexual coercion.
A High Aggression Strategy for Smaller Males
- PsychologyPloS one
- 2012
If intruders are more likely to flee than retaliate, small males may benefit from attacking intruders before these have had an opportunity to assess the resident and/or the resource.
Influence of male morphology on male mating status and behavior during interunit encounters in western lowland gorillas.
- BiologyAmerican journal of physical anthropology
- 2008
The mechanisms through which males with more exaggerated traits could obtain a mating advantage, namely male-male fights or female mate choice are discussed.