Abstract:
Lateralization is the functional control of certain behaviors in the brain being processed by either the left or right hemisphere. Behavioral asymmetries can occur at an individual and population level, although population-level lateralization is less common amongst solitary species, whereas social species can benefit more from aligning and coordinating their activities. We assessed laterality (individual and population) through turning biases in the eusocial Damaraland mole rat, Fukomys damarensis. We considered factors such as breeding status (queen or subordinate), environment (wild-caught or captive), sex (male or female), colony and body mass. All individuals together demonstrated significant left-turning biases, which was also significant at the population level. Wild-caught animals were more strongly lateralized, had a wider spread over a laterality index and lacked the population-level left-turning bias as compared to captive mole rats. Subordinate animals were more lateralized than queens, demonstrating social status differences in turning biases for social mole rats. This emphasizes the importance of animal handling and context when measuring and interpreting behavioral asymmetries.
Description:
DATA AVAILABILITY STATEMENT :
Data is contained within the article.
SUPPLEMENTARY MATERIALS : FIGURE S1: The emmeans comparisons of absolute laterality (absolute value of the laterality index) between queens and subordinates (SUB), where arrows represent comparisons, and arrows which do not overlap represent significant comparisons; FIGURE S2: The emmeans comparisons of absolute laterality (absolute value of the laterality index) between wild-caught (W) and captive (C) individuals, where arrows represent comparisons, and arrows which do not overlap represent significant comparisons.
