Evidence for the existence of mothering styles in guinea pigs (Cavia aperea f. porcellus)

Mothering styles are generally assumed to exist, in particular in the case of primates. However, an experimental procedure to ensure this assumption h as been lacking and, moreover, mothering style was always defined past hoc. The short inter-birth interval and the possibility to cross-foster make th e guinea pig a suitable species that has an advantage over primates for thi s type of study. The maternal behaviour of ten subjects was registered during mothering of f our subsequent litters. To challenge a possible consistency of maternal beh aviour two variables were manipulated: parentage (own young or adopted youn g) and the condition of the mothers (pregnant or non-pregnant). The concordances found suggest that behavioural parameters necessary to cha racterize a mothering style in guinea pigs should contain either locomotor, affiliative or aggressive behaviour. Other behavioural parameters were not found adequate for characterizing mothering styles. As significant concordances of maternal behaviour were found, in spite of t he challenges offered, we conclude that guinea-pig mothers consistently dif fer from each other and hence that 'mothering styles' exist in guinea pigs.