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Rhesus social behaviour has been described as despotic, in that high-ranking individuals often show little tolerance, and frequently become aggressive towards non-kin. [49] Top-ranking female rhesus monkeys are known to sexually coerce unreceptive males and also physically injure them, biting off digits and damaging their genitals. [50]
The pit of despair was a name used by American comparative psychologist Harry Harlow for a device he designed, technically called a vertical chamber apparatus, that he used in experiments on rhesus macaque monkeys at the University of Wisconsin–Madison in the 1970s. [2]
Diana monkeys have been observed to respond to the most likely reason for the call, typically a human or leopard, based on the situation and respond according to that. If they deem a leopard is the more likely predator in the vicinity they will produce their own leopard-specific alarm call but if they think it is a human, they will remain ...
Humans have been using the rhesus macaque for scientific research since the late 1800s when the theory of evolution gained more acceptance, according to a 2022 research paper by the journal eLife. The first study on the species was published in 1893 and described the “anatomy of advanced pregnancy," according to the eLife paper.
Rhesus monkeys have been proven to differentiate between numbers of apples in a container even when the sizes of the apple slices were manipulated (some larger but fewer slices). While this could be attributed to PIS, the act of comparing groupings of small numbers suggests subitization is likely at play, especially because the experiment broke ...
In one approach testing monkeys, rhesus macaques (Macaca mulatta) are able to "steal" a contested grape from one of two human competitors. In six experiments, the macaques selectively stole the grape from a human who was incapable of seeing the grape, rather than from the human who was visually aware. [ 26 ]
However, a rhesus monkey was cloned in 1999 using what researchers consider a simpler cloning method. In that case, scientists split the embryos, much like what happens naturally when identical ...
The great apes, dolphins, and rhesus monkeys have demonstrated the ability to monitor their own mental states and use an "I don't know" response to avoid answering difficult questions. Unlike the mirror test, which reveals awareness of the condition of one's own body, this uncertainty monitoring is thought to reveal awareness of one's internal ...