TL;DR: The domestic guinea pig living under seminatural conditions is slow to adapt to its new environment, however, they are able to maintain themselves as a society, though a weakly organized one.
Abstract: 2. The domestic guinea pig living under seminatural conditions is slow to adapt to its new environment. Once the animals become accustomed to a situation, however, they are able to maintain themselves as a society, though a weakly organized one. 3. Guinea pigs are predominantly crepuscular, avoiding direct sunshine and darkness. 4. Their social behavior under semi-natural conditions is chiefly characterized as follows: a) Allelomimetic behavior, with the young following the adults and the males following the females. b) Et-epimeletic behavior, when the young whistle loudly in the absence of adults and the adults whistle for attention supplied by the human caretaker. c) Sexual behavior, which matures early and is frequently expressed by the males as they follow both estrus and anestrus females. d) Agonistic behavior among the males which fight vigorously, particularly in the presence of estrus females. Females are less antagonistic but display a weak and flexible social hierarchy.
TL;DR: For instance, this paper found that White Leghorn (WL) chickens would show less synchronized behaviour than the ancestor, the red jungle fowl (RJF), and that red junglefowl were more synchronized during perching and a tendency for the same behaviour.
TL;DR: Interactions between chimpanzees and zoo visitors were documented and it was found that the two species imitated each other at a similar rate, corresponding to almost 10% of all produced actions.
Abstract: Imitation is a cornerstone of human development, serving both a cognitive function (e.g. in the acquisition and transmission of skills and knowledge) and a social–communicative function, whereby the imitation of familiar actions serves to maintain social interaction and promote prosociality. In nonhuman primates, this latter function is poorly understood, or even claimed to be absent. In this observational study, we documented interactions between chimpanzees and zoo visitors and found that the two species imitated each other at a similar rate, corresponding to almost 10% of all produced actions. Imitation appeared to accomplish a social–communicative function, as cross-species interactions that contained imitative actions lasted significantly longer than interactions without imitation. In both species, physical proximity promoted cross-species imitation. Overall, imitative precision was higher among visitors than among chimpanzees, but this difference vanished in proximity contexts, i.e. in the indoor environment. Four of five chimpanzees produced imitations; three of them exhibited comparable imitation rates, despite large individual differences in level of cross-species interactivity. We also found that chimpanzees evidenced imitation recognition, yet only when visitors imitated their actions (as opposed to postures). Imitation recognition was expressed by returned imitation in 36% of the cases, and all four imitating chimpanzees engaged in so-called imitative games. Previously regarded as unique to early human socialization, such games serve to maintain social engagement. The results presented here indicate that nonhuman apes exhibit spontaneous imitation that can accomplish a communicative function. The study raises a number of novel questions for imitation research and highlights the imitation of familiar behaviours as a relevant—yet thus far understudied—research topic.
TL;DR: It is concluded that the results are consistent with the hypothesis that one factor which may produce social facilitation is mutual mimicry of goal-directed behavior, and that this factor may act independently of competition.
Abstract: 1 This experiment represents an attempt to distinguish effects of social facilitation which may be caused by mutual mimicry of goal-directed behavior, and those which may be caused by competition 2 Unfamiliarity should interfere with mutual mimicry but should intensify competition 3 Sixteen dogs of five different breeds were run in familiar and unfamiliar pairs as well as alone 4 Dogs run repeatedly with the same unfamiliar animal showed no important differences in either mutual mimicry or social facilitation as compared with runs with familiar animals 5 Dogs run with a different animal on each day showed lessened mutual mimicry and social interference amounting to 73 % 6 It is concluded that the results are consistent with the hypothesis that one factor which may produce social facilitation is mutual mimicry of goal-directed behavior, and that this factor may act independently of competition 7 As a further hypothesis, it is proposed that this factor may exist in any species which shows allelomimetic behavior, and that it may modify the effects of competition in such species 8 Certain comparisons with human situations are discussed