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    The long-term impact of infant rearing background on the behavioural and physiological stress response of adult common marmosets (Callithrix jacchus)

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    Authors
    Ash, Hayley; orcid: 0000-0002-2743-2183
    Smith, Tessa E.
    Buchanan-Smith, Hannah M.
    Publication Date
    2020-12-26
    
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    Abstract
    Although triplet litters are increasing in captive colonies of common marmosets, parents can rarely rear more than two infants without human intervention. There is however much evidence that early life experience, including separation from the family, can influence both vulnerability and resilience to stress. The current study investigated the behavioural and hypothalamic pituitary adrenal (HPA) axis response to the routine stressor of capture and weighing in adult common marmosets (Callithrix jacchus), reared as infants under 3 different conditions: family reared twins (n = 6 individuals), family reared animals from triplet litters where only 2 remain (2stays: n = 8) and triplets receiving supplementary feeding from humans (n = 7). In the supplementary feeding condition, infants remained in contact with each other when they were removed from the family. There were no significant differences (P > 0.5) in cortisol level or behaviour between the rearing conditions. In all conditions, salivary cortisol decreased from baseline to post capture, which was accompanied by increases in agitated locomotion. Familyreared 2stays demonstrated significant cortisol decreases from baseline to post capture (post 5 min.: P = 0.005; post 30 min.: P = 0.018), compared to the other conditions. Family reared twins displayed significantly more behavioural changes following the stressor than the other conditions, including significant increases in scent marking (post 5 min. and post 30 min.: P = 0.028) and significant decreases in inactive alert (post 5 min.: P = 0.042), calm locomotion (post 5 min.: P = 0.028; post 30 min.: P = 0.046) and proximity to partner (post 5 min.: P = 0.046). There were increases in behaviour suggesting reduced anxiety, including significantly more exploration post capture in supplementary fed triplets (post 5 min.: P = 0.041), and significantly more foraging post capture in family reared 2stays (post 5 min. .: P = 0.039). However, as differences between rearing conditions were minimal, supplementary feeding of large litters of marmosets at this facility did not have a major effect on stress vulnerability, suggesting that this rearing practice may be the preferred option if human intervention is necessary to improve the survival of large litters.
    Citation
    Applied Animal Behaviour Science, volume 234, page 105169
    Publisher
    Elsevier
    URI
    http://hdl.handle.net/10034/624133
    Type
    article
    Description
    From Elsevier via Jisc Publications Router
    History: accepted 2020-11-22, epub 2020-12-26, issue date 2021-01-31
    Article version: AM
    Publication status: Published
    Funder: National Centre for the Replacement, Refinement and Reduction of Animals in Research; FundRef: https://doi.org/10.13039/501100000849; Grant(s): NC/K500434/1
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