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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Bautista, Amando Rödel, Heiko G. Monclús, Raquel Juárez-Romero, Margarita Cruz-Sánchez, Eliseo Martínez-Gómez, Margarita Hudson, Robyn |
| Description | Author Affiliation: Bautista A ( Centro Tlaxcala de Biología de la Conducta, Universidad Autónoma de Tlaxcala-Universidad Nacional Autónoma de México, Mexico. Electronic address: abopup@gmail.com.); Rödel HG ( Laboratoire d'Ethologie Expérimentale et Comparée E.A. 4443 (LEEC), Université Paris 13, Sorbonne Paris Cité, Villetaneuse F-93430, France.); Monclús R ( Laboratoire d'Ethologie Expérimentale et Comparée E.A. 4443 (LEEC), Université Paris 13, Sorbonne Paris Cité, Villetaneuse F-93430, France); Juárez-Romero M ( Centro Tlaxcala de Biología de la Conducta, Universidad Autónoma de Tlaxcala-Universidad Nacional Autónoma de México, Mexico.); Cruz-Sánchez E ( Maestría en Ciencias Biológicas, Universidad Autónoma de Tlaxcala, Mexico.); Martínez-Gómez M ( Centro Tlaxcala de Biología de la Conducta, Universidad Autónoma de Tlaxcala-Universidad Nacional Autónoma de México, Mexico); Hudson R ( Insituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico. Electronic address: rhudson@biomedicas.unam.mx.) |
| Abstract | In mammals, body mass at birth is an important predictor of early postnatal growth and survival. Within litters, heavier young are more successful in competing for limited resources and show higher rates of growth and survival than their lighter sibs. In the present study, we investigated the contribution of two aspects of the intrauterine environment to within-litter differences in birth mass, growth and survival in the rabbit (Oryctolagus cuniculus): implantation site along the uterine horns and number of adjacent male fetuses. We used unilaterally ovariectomized mothers in order to infer relative sites of implantation from the birth order of pups from the single functional uterine horn. Pups from the extremities of the horn were significantly heavier at birth and weaning than their siblings from more central positions and had a higher probability of survival. The effect on body mass was still apparent 3 weeks after weaning in pups that had occupied positions at the ovarian end of the horn. The number of adjacent male fetuses did not affect individuals' growth or survival, and there were no differences between females and males. There were also no significant interactions between the different variables considered, indicating that the effects of implantation site on individuals' birth mass, growth and survival relative to littermates were independent of number of male neighbors, sex or litter size. Our study clearly demonstrates that in the rabbit, the site of implantation along the uterine horns is a major contributor to individual differences among littermates in early postnatal growth and survival. |
| File Format | HTM / HTML |
| ISSN | 00319384 |
| Volume Number | 138 |
| e-ISSN | 1873507X |
| Journal | Physiology & Behavior |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2015-01-01 |
| Publisher Place | United States |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Animals, Newborn Litter Size Rabbits Research Support, Non-u.s. Gov't Body Weight Ovariectomy Birth Order Weaning Male Sex Characteristics Embryo Implantation Journal Article Pregnancy Discipline Physiology Growth & Development Embryology Animals Uterus Survival Analysis Fetus Female Physiology Discipline Behavioral Neuroscience |
| Content Type | Text |
| Resource Type | Article |
| Subject | Experimental and Cognitive Psychology Behavioral Neuroscience |
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