Panizzon Paolo, Gismann Jakob, Riedstra Bernd, Nicolaus Marion, Brown Culum, Groothuis Ton
Department of Biological Sciences, Macquarie University, Wallumattagal Campus, Macquarie Park, Culloden Rd 205 BCR, NSW 2000 Sydney, Australia.
Behavioral Biology, Groningen Institute for Evolutionary Life Sciences, University of Groningen, Linnaeusborg (1st floor), Nijenborgh 7, 9747 AG Groningen, The Netherlands.
Behav Ecol. 2024 Mar 6;35(3):arae012. doi: 10.1093/beheco/arae012. eCollection 2024 May-Jun.
Individual differences in laterality and personality are expected to covary, as emotions are processed differently by the two hemispheres, and personality involves emotional behavior. Fish species are often used to investigate this topic due to the large variability in personality and laterality patterns. While some species show a positive relationship between lateralization strength and boldness, others show a negative relationship, and some show no relationship. A new way to assess the robustness of such a relationship is to manipulate both laterality and personality to examine how this affects their relationship. To this end, we conducted a fully factorial design experiment manipulating predation and group size during early development. Results showed that the strength of laterality was influenced by predation threat, while social tendency and boldness were influenced by group size. These findings suggest that early life conditions can have an impact on laterality and social behavior. The relationship between laterality and personality traits, while present, was heavily influenced by the specific trial conditions but not by the different developmental conditions. In summary, the relationship between laterality and behaviors appears to be context-dependent, yet resilient to early environmental manipulations.
由于左右侧性和个性方面的个体差异预计会共同变化，因为两个半球处理情绪的方式不同，而个性涉及情绪行为。鱼类物种常被用于研究这个话题，因为它们在个性和左右侧性模式方面存在很大差异。虽然一些物种显示出侧化强度与大胆之间存在正相关关系，另一些物种显示出负相关关系，还有一些物种则没有关系。评估这种关系稳健性的一种新方法是同时操纵左右侧性和个性，以研究这如何影响它们之间的关系。为此，我们进行了一项完全析因设计实验，在早期发育过程中操纵捕食和群体大小。结果表明，侧化强度受捕食威胁的影响，而社交倾向和大胆程度受群体大小的影响。这些发现表明，早期生活条件会对左右侧性和社交行为产生影响。左右侧性与个性特征之间的关系虽然存在，但很大程度上受特定试验条件的影响，而不受不同发育条件的影响。总之，左右侧性与行为之间的关系似乎取决于具体情境，但对早期环境操纵具有一定的适应性。
