Assessing animal individuality:links between personality and laterality in pigs  

作　　者：Charlotte GOURSOT Sandra DUPJAN Ellen KANITZ Armin TUCHSCHERER Birger PUPPE Lisette M.C.LELIVELD 

机构地区：[1]Institute of Behavioural Physiology,Leibniz Institute for Farm Animal Biology(FBN),Wilhelm-Stahl-Allee 2,D-18196 Dummerstorf,Germany [2]Institute of Genetics and Biometry,Leibniz Institute for Farm Animal Biology(FBN),Wilhelm-Stahl-Allee 2,D-18196 Dummerstorf,Germany [3]Behavioural Sciences,Faculty of Agricultural and Environmental Sciences,University of Rostock,Justus-von-Liebig-Weg 6B,Rostock D-18059,Germany

出　　处：《Current Zoology》2019年第5期541-551,共11页动物学报（英文版）

摘　　要：Animal individuality is challenging to explain because individual differences are regulated by multiple selective forces that lead to unique combinations of characteristics.For instance,the study of personality,a core aspect of individuality,may benefit from integrating other factors underlying individual differences,such as lateralized cerebral processing.Indeed,the approach-withdrawal hypothesis(the left hemisphere controls approach behavior,the right hemisphere controls withdrawal behavior),may account for differences in boldness or exploration between left and right hemispheric dominant individuals.To analyze the relationships between personality and laterality we tested 80 male piglets with established laterality patterns for 2 motor functions(tail curling direction and the side of the snout used for manipulation)and a combined classification integrating both motor functions using cluster analysis.We analyzed basal salivary testosterone and cortisol along with their behavior in standardized tests as pre-established indicators of different personality traits(Boldness,Exploration,Activity,Sociability,and Coping).We found that the direction of the single motor biases showed significant associations with few personality traits.However,the combined laterality classification showed more,and more robust,significant associations with different personality traits compared with the single motor biases.These results supported the approachwithdrawal hypothesis because right-biased pigs were bolder and more explorative in a context of novelty.Additionally,right-biased pigs were more sociable than left-biased pigs.Therefore,the present study indicates that personality is indeed related to lateralized cerebral processing and provides insight into the multifactorial nature of individuality.

关 键 词：approach-withdrawal hypothesis COPING emotion HEMISPHERIC dominance motor LATERALIZATION TEMPERAMENT 

分 类 号：S82[农业科学—畜牧学]