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- W2030671770 abstract "Coping efficiently with novelty is essential for survival. Although ageing is a universal process, its impact on exploration, gathering information and assessing potential risks in novel and stressful situations is still not well understood. In the mound-building mouse, Mus spicilegus, the dispersal process involves two age classes (2-month-old and overwintered 6-month-old individuals). We compared exploration and risk-taking behaviour of four age groups of these mice in both sexes: young and overwintered dispersers and two older groups (12-month-old and 24-month-old animals) to investigate long-term age-related effects. Responses of these animals to novelty and anxiogenic situations were tested by three different tests: open field, elevated plus-maze and novel object exploration test. As expected, 2-month-old individuals displayed a low level of freezing and a high exploration of aversive places and of a novel object. This risk-taking profile may enable young individuals to disperse efficiently. At 6 months old, although no change was found in males, females already showed signs of anxiety, indicating a sex difference in anxiety development in this species. When 12 months old, both sexes were risk-averse and displayed strong emotional responses. We thus conclude that ageing processes lead to an increase in anxiety in the mound-building mouse. Against all expectations, 24-month-old females and males showed a similar profile to 2-month-old individuals revealing that ageing and anxiety may present a U-shaped relationship. Because the relationship between ageing and anxiety may be nonlinear, a multiple-point approach might be systematically applied in ageing research." @default.
- W2030671770 created "2016-06-24" @default.
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- W2030671770 date "2014-11-01" @default.
- W2030671770 modified "2023-09-30" @default.
- W2030671770 title "U-shaped relationship between ageing and risk-taking behaviour in a wild-type rodent" @default.
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- W2030671770 doi "https://doi.org/10.1016/j.anbehav.2014.08.018" @default.
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