The Chimpanzee Mating Pattern
As we know every living creature, just like humans, have their own unique way to mate and reproduce. Some of the mating patterns might depend on the environment, other might be determined by their size of the living creature, other might have evolve over time. In the primate world there is no difference and each primate has their own unique mating tactic. When it comes to the chimpanzee species they have three mating patterns, the opportunistic, the possessive,and the consortship patterns. Each mating pattern has its own benefit and its own cost when it is used.
Chimpanzees live in a fission-fusion societies, which are large and multimale, and multifemale communities. At times their big communities will split into smaller communities with different combination, such as single female and her offsprings, male and female pairs, or small group of both sexes (Klinkova, 2005). The reason why chimpanzees communitie have the need to split is due to lack of resources, so they split in order to cover a bigger area to look for food, but these communities come back together as one again (Klinkova, 2005). This type of society contributes to the different types of mating pattern that chimpanzees exhibit.
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And when females are ready to mate, the skin around her genitalia adapts a pink pigment and it starts to swollen as a sign that she is ready for mating (Klinkova, 2005) . Chimpanzees have their own unique way to express when they are ready to mate or have sex. In case of the females, they tends to display their swollen bottom on the male’s face to show him that she is ready. While males, when they want to have sex or mate, they tend to shake tree branches and display his erect pennis to the female (Matsumoto-Oda,
A Primate’s Memoir, written by Robert Sapolsky, documents the author’s time in Kenya while he studied the various behaviors of a troop of baboons. One of the key aspects of the book was the social rank that developed within the troop. Female baboons have a social hierarchy that is fairly cut and dry. The eldest baboons in the troop are considered the higher-ranking females, and as the baboons get younger, so to follows the string of dominance. The ranking for males was essentially from the strongest baboons to the weakest baboons. The baboon at the top of the social hierarchy was considered the alpha male. This social rank has huge implications for the troop in regards to which baboons mated with each other. If another baboon wanted to become the alpha male, then he would have to challenge the current alpha male to a fight, and win. The baboon’s distinct personality mixed with their instincts are the primary factors for where one lands on the social hierarchy. Another key aspect of the book was the strategies that took place when the baboons wanted to mate with another baboon. Similar to humans, the baboon males tried to impress the female baboons in a way that would make them want to mate. The rank of the male is considered to be one of the greatest factors contributing to what mate they end up with, because there is nothing more impressive than becoming a high-ranking baboon. Also, there were instances of lower-ranking baboons strategizing and forming teams with other baboons to become a higher ranking baboon for the mating possibilities. The baboons in the group are considered a patch-work of different troops, as it is common for one baboon to move to different groups frequently.
There are contrasts in tool kits used by different groups of chimpanzees, which seem to be a result of the environment in which they live as well as information that is shared by the group. For example, in 1973 it was reported that chimpanzees in Gombe did not use hammer stones, but those of Cape Palmas did. We will explore the tool use of Chimpanzees from the wild, including Gombe, Tai National Forest, and the Congo Basin---and contrast those with Chimpanzees in captivity in locations of Zoo’s both in the United States and abroad.
...er after birth than the common Chimpanzee, and unlike sterile and young Chimpanzees, Bonobos who can’t conceive still engage in sexual activities.
Dr. Goodall is a well-known British primatologist who has discovered a substantial amount about primates in her many years of research. She has written numerous books, including one that we will be going into depth about called, “Through a Window.” Her book contains personal experiences, research findings, and even pictures to help the readers visualize her scientific breaking moments from her thirty years with the chimpanzees of Gombe. She states that there is are minor differences, and several similarities between humans and the chimpanzees. We will discuss these differences and similarities through their social behavior, intellectual ability, and emotions. To conclude, examine Goodall’s research to adopt what her findings can tell us about our early ancestors, and whether or not her study coincided to the steps of scientific methodology.
Harms, William. "Professor Finds That Nonhuman Primates Have Evolutionary Reason to Bond with Their Offspring." Professor Finds That Nonhuman Primates Have Evolutionary Reason to Bond with Their Offspring. The University of Chicago Chronicle, 12 July 2001. Web. 24 Mar. 2014.
As our neighboring living families, chimpanzees as well as bonobos have been extensively used as prototypes of the behavior of early hominids. However, In modern years, as statistics on the social behaviors or conduct and ecosystem of bonobos has evidently come to light, a lot of interspecific assessments have been done. Chimpanzees have been described in terms of their intercommunity struggle, meat eating, infanticide, anthropogy, male position-striving, and supremacy over females. Bonobos, for the meantime, have been depicted as the ‘‘creator of love, but not a war’’ ape, categorized by female power-sharing, a deficiency of hostility between either characters or groups, expounded sexual behavior that happens without the restraint of a thin window of fruitfulness, and the usage of sex for communicative determinations. This paper evaluates the indication for this contrast and reflects the reasons that distinct portrayals of the two great apes have advanced.
Primates housed in organizations like zoos and laboratories have developed catastrophic behavior; due to the lack of their natural habitat and the lose of freedom to pursue their own lives. Chimpanzees have directed themself to attempt abnormal and often revolting behavior. During their life in captivity they exibit biting themselves, drinking urine, eating feces, pating genitals, rocking, plucking hair, and fumpling niples (Birkett and Newton-Fisher). Another factor that gives chimpanzees
In primates such as chimpanzees it is imperative to look at their culture to understand their intelligence. Culture in this circumstance means a specific set of behaviors obtained through learning in a population/species. Chimpanzee’s intelligence is quite unique how they interact with their environment and use it to their benefit just like humans. They have the ability to overcome the obstacles of everyday life through learning and the ability to use tools to create a better quality of life. The complexity of their intellect is different from any other animal ever seen. A significant part of chimpanzee intelligence that sets them apart from other primates and puts them closer to humans is the way they exhibit social learning within their culture and interactions within their environment.
Quiatt, D., & Reynolds, V. (1993). Primate behaviour: information, social knowledge, and the evolution of culture. Cambridge [England: Cambridge University Press].
Chimpanzees portray their emotions through a number of facial expressions and mannerisms. Just like humans, they undergo mood swings, jealous rages, and laughter. For instance, Goodall observed during her research that a male gorilla “would threaten [me] with an upward and backward movement jerk of his head…” Some of their emotions are easy to read, while at other times we have to look at multiple places on their faces to understand their feelings. A chimpanzee also uses its facial expressions and sounds to communicate with each other, such as hoots and yells.
A psychological mechanism is defined as an adaptation of human behavior that evolved due to evolutionary pressures. This paper focuses on the psychological mechanism of human mating strategies and the evolution of mate preferences. There are several theories to explain how differences in male and female mating strategies developed. This paper explores the parental investment theory, male mating effort as well as the role of different adaptive problems faced by males and females. The traits that humans find attractive in a partner are the ones that confer a reproductive advantage to the individual (Buss, 1994). Early in the literature there is evidence to support the theory that males and females differ in their mate preferences in such a way that males are unselective while females are choosy (Darwin 1871). However, there are also similarities in what each sex finds attractive. It is important to look at how these mating strategies evolved and why adaptive mate preferences continue to exist.
As stated in the article, “each ape’s social success depends on what other group members are up to, natural selection has favored the capacity for social maneuvers and [superior intelligence]” (2). Natural selection also favors apes because they are not ones to dwell or hold grudges on other apes when they get into feuds. Frans de Waal, a primatologist at the Arnheim Zoo in the Netherlands, shows how natural selection has also promoted the ability to strengthen the relationships of others. In his example, he gives an account of Mama, the most influential female in the colony, who would reconcile other apes after they got into
Chimpanzees are a lot like humans in their behaviours. They are extremely smart since they are able to make and use tools and weapons. The female mothers are very affectionate and protective over the young and the rest of their family. The young chimps are also very dependant on their mother for necessities such as food, shelter and warmth.
Though an interesting point to bring up is that tool usage is not unique to humans and chimpanzees (and other apes), for example ravens have been seen to use sticks in order to get food out of crevices. Chimpanzees in the wild often live in communities where they hunt in groups and share what food they gather with one another. And like in human communication body language and actions like hugging or kissing are very important for chimpanzees (Muir). One of the most astounding similarities though is that it is believed the chimpanzees can feel emotions (like sadness and joy) and that those emotions can influence their actions just like with humans. Those similarities and more are the evidence that chimpanzees and humans are closely related, but there are still many differences between our species’ that affects how humans and chimps settle in their environment.
One of the largest issues in animal sexual reproduction is the conflict of interests between the female and the male of the species. For example, multiple mating has been shown to greatly increase the fertilization rate for the male, but recent studies have shown that multiple mating also benefits the female.