Comparative analysis of maternal care in the high-yawning (HY) and low-yawning (LY) sublines from sprague–dawley rats

作者: Araceli Ugarte , Jose R. Eguibar , Ma. del Carmen Cortés , Bertha A. León-Chávez , Angel I. Melo

DOI: 10.1002/DEV.20497

关键词: OffspringLickingInternal medicinePsychologyOpen fieldMouthingDevelopmental psychologyLactationAnimal modelEndocrinologySprague dawley rats

摘要: High- and low-yawning rats (HY LY) were selectively bred as a function of their spontaneous yawning frequency with the LY subline about 2 yawns/ hr HY 20 yawns/hr. The have more grooming bouts travel longer distances in an open field. dams spent less time nest, retrieved pups faster, show latency to licking mouthing than or outbred Sprague-Dawley (SD) animals. percentage that had atypical retrieving was higher, lower nest quality, produced offspring whose weights those from subline. We also showed pregnant fewer lost at least three during lactation higher SD dams. In conclusion, are motivated take care pups, but ''fine tuning'' maternal is disturbed. 2010 Wiley Periodicals, Inc. Dev Psychobiol

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