Deviterne D, Desor D, Krafft B
Laboratoire de Biologie du Comportement, U.R.A. 1293 C.N.R.S., Université de Nancy I, France.
Dev Psychobiol. 1990 May;23(4):349-60. doi: 10.1002/dev.420230406.
Variations of two maternal behavior components (time spent with litter and rapidity of pup retrieving) as well as certain physical and developmental characteristics of pups (weight, relative weight gain, and neuromotor maturation) in rats were simultaneously studied in 29 various-sized litters in which interindividual variations were not experimentally amplified. Results showed mothers' behavioral adaptations to litters' characteristics (size and weight). Time spent with young was linked to litter size, whereas rapidity of pup retrieving was related to the pups' physical characteristic. Beyond these adaptive variabilities, residual variations subsisted between mothers. These variations were determinant for differences in pup development for only one component: the time that mothers spent with their litters, while pup retrieving component variations did not have any effect.
在29窝大小各异且个体间差异未通过实验扩大的大鼠中，同时研究了两种母性行为成分（与幼崽相处的时间和找回幼崽的速度）的变化以及幼崽的某些身体和发育特征（体重、相对体重增加和神经运动成熟度）。结果显示，母亲的行为会适应幼崽的特征（大小和体重）。与幼崽相处的时间与窝的大小有关，而找回幼崽的速度与幼崽的身体特征有关。除了这些适应性变化外，母亲之间还存在残余变化。这些变化仅对幼崽发育的一个成分有决定性影响：母亲与幼崽相处的时间，而找回幼崽成分的变化没有任何影响。
