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Multi-assay approach shows species-associated personality patterns in two socially distinct gerbil species
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Multi-assay approach shows species-associated personality patterns in two socially distinct gerbil species
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Multi-assay approach shows species-associated personality patterns in two socially distinct gerbil species
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Journal Article
Multi-assay approach shows species-associated personality patterns in two socially distinct gerbil species
2024
Overview
We aimed to investigate whether two closely related but socially distinct species of gerbils differ in personality patterns. Using a suit of multivariate repeated assays (docility test, dark-light emergence test, startle test, novel object test, elevated platform test, and stranger test), we assessed contextual and temporal consistency of docility, boldness, exploration, anxiety, and sociability in the solitary midday gerbil, Meriones meridianus , and social Mongolian gerbil, M . unguiculatus . We revealed contextually consistent and highly repeatable sex-independent but species-specific personality traits. Species differed in temporal repeatability of different behaviours, and contextual consistency was more pronounced in solitary M . meridianus than in social M . unguiculatus . This finding contradicts the social niche specialization hypothesis, which suggests that personality traits should be more consistent in more social species. Instead, we hypothesize that social complexity should favour more flexible and less consistent behavioural traits. The habituation effect indicative of learning abilities was weak in both species yet stronger in social M . unguiculatus , supporting the relationship between the sociality level and cognitive skills. In both species, only a few different behavioural traits covaried, and the sets of correlated behaviours were species-specific such that the two species did not share any pair of correlated traits. Between-species differences in personality traits, habituation, and behavioural syndromes may be linked to differences in sociality. The lack of prominent behavioural syndromes is consistent with the idea that context-specific individual behavioural traits might be favoured to allow more flexible and adequate responses to changing environments than syndromes of correlated functionally different behaviours.
Publisher
Public Library of Science,Public Library of Science (PLoS)
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