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Sperm competition: mating system, not breeding season, affects testes size of primates
Investigating the potential for breeding seasonality to confound the relation between testes size and mating system in primates finds no confounding effect, apparently supporting the difficulty of defence hypothesis but the sample by no means allows a firm conclusion.
16 – Sperm Competition in Mammals
Strategies of emigration and transfer by primates, with particular reference to gorillas.
- A. Harcourt
- BiologyZeitschrift fur Tierpsychologie
- 26 April 2010
Detailed data is presented on individuals' movements into and out of breeding units for the gorilla and the reasons for the observed sex differences in frequency of movement are discussed.
Human density as an influence on species/area relationships: double jeopardy for small African reserves?
Small reserves are especially likely to lose species. Is that because the reserves are small, or because small reserves are located in especially adverse landscapes? It seems that the question has…
Species–area relationships of primates in tropical forest fragments: a global analysis
Summary 1 While in general the tropics and large-bodied tropical forest mammals are poorly understood, the effects of fragmentation on tropical forest and the tropical mammalian order of…
Reproduction in wild gorillas and some comparisons with chimpanzees.
- A. Harcourt, D. Fossey, K. Stewart, D. Watts
- BiologyJournal of reproduction and fertility. Supplement
The observed differences between the species in courtship and mating behaviour can be related to differences in the number of males available to and competing for oestrous females: in the loose multi-male chimpanzee community there is more advantage to males in initiating copulation and mating frequently and efficiently, and to females in advertising oestrus, than in the relatively stable one-male mating system of the gorilla.
Social relationships between adult male and female mountain gorillas in the wild
- A. Harcourt
- PsychologyAnimal Behaviour
- 1 May 1979
Stag Parties Linger: Continued Gender Bias in a Female-Rich Scientific Discipline
Analysis of 21 annual meetings of the American Association of Physical Anthropologists reveals that within the subfield of primatology, women give more posters than talks, whereas men give more talks than posters.
Functions of Wild Gorilla 'Close' Calls. I. Repertoire, Context, and Interspecific Comparison
The call repertoire, the age-sex distribution of frequencies of call-types, the contexts in which the calls are given, and the most detailed description yet of any great ape's within-group vocalisations are described, suggest two main contexts of production, namely situations of potential separation and potentially agonistic situations.
Gorilla Society: Conflict, Compromise, and Cooperation Between the Sexes
Societies develop as a result of the interactions of individuals as they compete and cooperate with one another in the evolutionary struggle to survive and reproduce successfully. Gorilla society is…