Social experience shape behavioural individuality and within-individual stability

Individual repeatability characterises many behaviours. Repeatable behaviour may result from repeated social interactions among familiar group members, owing to adaptive social niche specialisation. In the context of aggression, in species like field crickets, social niche specialisation should also occur when individuals repeatedly interact with unfamiliar individuals. This would require the outcome of social interactions to have carry-over effects on fighting ability and aggressiveness in subsequent interactions, leading to long-term among-individual differentiation. To test this hypothesis, we randomly assigned freshly emerged adult males of the southern field cricket Gryllus bimaculatus to either a solitary or social treatment. In the social treatment, males interacted with a same-sex partner but experienced a new partner every three days. After three weeks of treatment, we repeatedly subjected treated males to dyadic interactions to measure aggression. During this time, we also con...

许多行为具有个体重复性特征。由于适应性社会生态位特化，熟悉群体成员间的重复社会互动可能导致可重复行为的产生。在攻击行为的语境下，对于如田蟋等物种，当个体与不熟悉的个体重复互动时，社会生态位特化也应发生。这需要社会互动的结果对后续互动中的战斗能力和攻击性产生遗留效应，从而导致长期的个体间分化。为验证这一假设，我们将新羽化的双斑蟋（Gryllus bimaculatus）成年雄性随机分配至单独处理组或社会处理组。在社会处理组中，雄性与同性伙伴互动，但每三天更换一次新伙伴。经过三周处理后，我们让处理组雄性重复进行二元交互以测定其攻击性。在此期间，我们还进行了...