Coureaud G, Schaal B, Coudert P, Rideaud P, Fortun-Lamothe L, Hudson R, Orgeur P
Laboratoire de Comportement Animal, INRA/CNRS, URA 1291, Station de Physiologie de la Reproduction, Nouzilly, France.
Reprod Nutr Dev. 2000 Jan-Feb;40(1):19-32. doi: 10.1051/rnd:2000117.
This study was aimed at characterising the impact of immediate postnatal sucking on pup survival and development. The interactive effects of postnatal success with the day 0 weight of pups, the nest-access regimen (controlled or free) or parity of females was investigated. Pups (n = 900) were categorised according to their initial ingestion of colostrum. In primiparous does: (1) pup mortality between d0-d10 was higher for unsuccessful than for successful early suckers; (2) lighter d0-weight reduced survival for unsuccessful but not for successful pups; (3) free nest-access of females annihilated the survival advantage fostered by the initial sucking success. In secondiparous does, these impacts waned. Finally, whatever the does' parity, only d0-weight influenced pup weight-gain between d0-21. Thus, pup survival seemed to depend (at least in primiparae) on their ability to suck right after birth, and to display a pattern of energy saving without being disturbed by the females' nest entries.
本研究旨在描述产后即刻吸吮对幼崽存活和发育的影响。研究了产后成功与幼崽出生日体重、巢穴进入方式（控制或自由）或母鼠胎次之间的交互作用。根据幼崽初乳摄入量对900只幼崽进行分类。在初产母鼠中：（1）出生后0至10天，初乳摄入不成功的幼崽死亡率高于成功的早期吸吮者；（2）出生日体重较轻会降低初乳摄入不成功幼崽的存活率，但对成功幼崽没有影响；（3）母鼠自由进入巢穴消除了初乳吸吮成功带来的存活优势。在经产母鼠中，这些影响减弱。最后，无论母鼠胎次如何，只有出生日体重影响出生后0至21天幼崽的体重增加。因此，幼崽的存活似乎（至少在初产母鼠中）取决于它们出生后立即吸吮的能力，以及在不被母鼠进入巢穴干扰的情况下表现出节能模式的能力。
