Sibling effects on the behavior of infant mouse litters (Mus domesticus).

Laviola, Giovanni; Alleva, Enrico

doi:10.1037/0735-7036.109.1.68

Cited by 57 publications

(40 citation statements)

References 58 publications

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“…Some evidence of increased exploration rates comes from the lack of selectivity of the interactions: females that interacted more did so with a greater number of different partners. Moreover, exploration is a male-like behaviour and masculinized females are more exploratory than non-masculinized females [25]. Exploration might trigger higher dispersal rates, and previous studies found that masculinized females are more likely to disperse [5,26].…”

Section: Discussionmentioning

confidence: 99%

Masculinized female yellow-bellied marmots initiate more social interactions

2011

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The presence of male siblings in utero influences female morphology and life-history traits because testosterone transferred among foetuses may masculinize females. Similarly, litter sex composition might alter the display of sexually dimorphic behaviour, such as play and allogrooming, since they are modulated by androgens. We explored whether masculinization alters the frequency of play and sociopositive behaviour in female yellow-bellied marmots (Marmota flaviventris). We found that masculinized juvenile females were more likely to initiate play and allogrooming, but yearling females exhibited higher levels of oestrogen-modulated sociopositive behaviours. Additionally, the more they interacted, the greater number of different partners they interacted with. Our results suggest that masculinization increases the rate of age-dependent social behaviour. This probably works by increasing exploration that predisposes individuals to higher encounter rates. Further support comes from previous findings showing that masculinized females were more likely to disperse. Our study stresses the importance of considering litter sex composition as a fitness modulator.

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Section: Discussionmentioning

confidence: 99%

Masculinized female yellow-bellied marmots initiate more social interactions

2011

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“…Conversely, there is evidence that suggests that prolonged postnatal development affects a wide range of neurobehavioral systems, and not just play. For example, mice (Mus domesticus) have only a rudimentary form of social play compared to rats (Pellis & Pasztor, 1999), although the solitary, locomotor forms of play in mice seem to be as complex as that in rats (Laviola & Alleva, 1995;Pellis & Pellis, 1983;Terranova, Laviola, & Alleva, 1993). Not only do mice have a rudimentary pattern of social play but they also are simpler than rats for a wide range of social and nonsocial cognitive capacities (Whishaw, Metz, Kolb, & Pellis, 2001).…”

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confidence: 97%

Development of play fighting in kindling‐prone (FAST) and kindling‐resistant (SLOW) rats: How does the retention of phenotypic juvenility affect the complexity of play?

Reinhart

Pellis

McIntyre

2004

Developmental Psychobiology

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Rats selectively bred for susceptibility to amygdala kindling (FAST) have been shown to retain neural and behavioral features of the juvenile phase into adulthood. In contrast, rats selectively bred for resistance to amygdala kindling (SLOW) are neurobehaviorally more typically adult. The development of play fighting in male and female rats of both selected lines was studied. Given the apparent association of juvenility and play often noted in the literature for mammals in general, it was predicted that the FAST rats should be more playful and be more likely to retain the juvenile tactics of play that lead to more prolonged and complex patterns of social contact. As expected, FAST rats initiated more playful attacks and were more likely to defend against attacks than SLOW rats as both juveniles and adults. Unexpectedly, however, both selected lines exhibited patterns of defense that reduced the likelihood of complex and prolonged social contact. Importantly, the two selected lines did so by very different means. The FAST rats did so by avoiding contact whereas the SLOW rats did so by responding in an adult-typical manner that blocks contact. That is, the FAST rats exaggerated the changes typically occurring at puberty whereas the SLOW rats, at all ages, responded in a more adult manner. These data suggest that the different components of play fighting do not change uniformly with changes in the neurobehavioral underpinnings of juvenility.

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“…Play behaviour varies among litters as a function of litter size, litter sex ratio, and nutritional state or weight (Caro 1981;Laviola & Alleva 1995;D'Eath & Lawrence 2004;Nunes et al 2004). Such interlitter variability is also correlated with major differences in adult behaviours, including aggressiveness, sexual behaviour, maternal behaviour and behavioural, hormonal and neurochemical responses to stress and novelty (Sharpe et al 1973;Namikas & Wehmer 1978;Laviola & Terranova 1998;D'Eath & Lawrence 2004).…”

Section: Article In Pressmentioning

confidence: 99%