Paternal care in New World Primates
Extensive parental care is well developed in several genera of New World primates (genera Callicebus, Aotus, Callimico, Calltthrix, Cebuella, Leontopithecus, Saguinus) including most of the indirect and direct paternal care behaviors described by Kleiman and Malcolm (1981). Paternal care is correlated with a monogamous (and perhaps polyandrous) mating system and a small group size. Additionally, […]
Do mothers prefer helpers? Birth sex-ratio adjustment in captive callitrichines
Parental investment theory predicts that natural selection will favour a parental ability to bias the offspring sex ratio in favour of that which will yield the highest benefit–cost payoff. The local resource enhancement hypothesis posits that in cooperative breeders, parents may favour offspring that will mitigate parental effort by helping to raise younger siblings. Conversely, […]