作者: Kelsey J. Wood , Victoria H. Zero , Albyn Jones , Suzy C. P. Renn
DOI: 10.1111/ETH.12227
关键词: Biology 、 Sexual dimorphism 、 Zoology 、 Ecology 、 Dominance (ethology) 、 Aggression 、 Julidochromis 、 Nest 、 Julidochromis marlieri 、 Cichlid 、 Paternal care
摘要: In biparental species, aggression, dominance, and parental care are typically sexually dimorphic. While behavioral dimorphism is often strongly linked to gonadal sex, the environment—either social or ecological—may also influence sex-biased behavior. cichlid fish Julidochromis marlieri, typical environment for breeding pairs consists of large females paired with smaller males. both sexes capable providing territory defense care, larger female provides majority pair, while male remains in nest guarding their offspring. We examine contributions sex relative mate size these behaviors monogamous J. marlieri pairs. Both female-larger male-larger were formed laboratory observed territorial aggression (against conspecifics heterospecifics), care. pairs, intra-pair dominance female-biased, this bias was reversed. For pairing types, presence an intruder amplified differences always attacking greater frequency than its mate. Though less robust, there evidence plasticity sex-bias some egg related inverse direction. Our study suggests that influences aspect can override on individual's The remarkable species makes exciting model could be used address relationship between proximate ultimate mechanisms plasticity.