Friday, November 30, 2018

Some articles on psychology of animals

The mating preferences of female fruitflies are strongly influenced by the existing preferences they observe in other females, generating traditions that are repeatedly passed on to others and spread in the population
The intense selection of chickens for production traits (egg laying) is thought to cause undesirable side effects & changes in behavior due to trade-offs from energy expenditure; contrary to expectations, productive hens show increased cognitive skills

Males reversed their initial preference for larger females in the presence of a conspecific audience male because they recognized the audience male as a competitor and tried to deceive that male about their real mating preference
A female fish that today doesn't need males to clone itself copulates with other species' males to stimulate embryonic development. Those males do that probably because the interactions of a sexual male and the female are observed by conspecific females and make that male more attractive
Sumatran orangutan mothers suppressed alarm calls up to 20 min until the model was out of sight in function of perceived danger for themselves & for an infant, suggesting high-order cognition
Chimpanzees appear to perceive similarity in primate faces in a similar way to humans. Information about perceptual similarity is likely prioritized over the potential influence of previous experience
Is birth attendance a uniquely human feature? New evidence suggests that Bonobo females protect and support the parturient
Prolonged transport and cannibalism of mummified infant remains by a Tonkean macaque mother

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