Relationships between uterine and fetal traits in rabbits selected on uterine capacity1

Argente, M. J.; Santacreu, M. A.; Climent, A.; Blasco, A.

doi:10.2527/2003.8151265x

Cited by 43 publications

(45 citation statements)

References 24 publications

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“…This result is probably related to the less competition for available uterine space and a better vascular supply (Duncan, 1969;Bruce & Abdul-Karim, 1973;Argente et al, 2003). Likewise, the increase in blood supply was associated with a higher availability of uterine space.…”

Section: Resultsmentioning

confidence: 80%

“…In mice, Wirth-Dzieciolowska (1987) obtains the same result in the late stages of gestation. The increase in the number of blood vessels reaching the implantation site is associated with a better nutrient supply and consequently, a better fetal development (Argente et al, 2003). Duncan (1969), Bruce and Abdul-Karim (1973) and Argente et al (2003) in rabbits and Vallet and Christenson (1993) in pigs.…”

Section: Resultsmentioning

confidence: 99%

“…According to their status, the fetuses were classified as alive or dead. In the implantation site, the presence of maternal placenta only or within atrophic fetal placenta was also considered as a dead fetus (Argente et al, 2003). There were 55 and 84 lives fetuses in nulliparous and primiparous respectively.…”

Section: Experimental Design and Measurementmentioning

confidence: 99%

“…The number of blood vessels that receive each live fetus was calculated in order to evaluate the vascular supply according to Argente et al (2003). Live fetuses were classified as receiving less-than or equal to 4 blood vessels (≤ 4) and greater-than or equal to 5 blood vessels (≥ 5).…”

Section: Experimental Design and Measurementmentioning

confidence: 99%

“…Finally, the number of blood vessels arriving at each implantation site, seems to have an important effect on fetal and placental development, as well as on fetal survival (Mocé et al, 2004;Argente al., 2003). Poor blood supply is associated with lower fetal and placentae weight and higher probability of death (Argente et al, 2003). These factors were studied generally for the same parity.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Characterization of Local Algerian Population of Rabbit: Factors Influencing Fetal and Placental Development

Belabbas¹,

ImenIlès²,

Baziz³

et al. 2013

JAS

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The objective of our work was to study the effect of parity the parity of the does, the intra uterine position and vascularization of the fetuses and their number per horn on, available uterine space and placentae development in the rabbit at two stages (nulliparous and primiparous). To this aim, twenty rabbit does of locally Algerian population were distributed in two groups of 10 each (nulliparous and primiparous). The does were mated and slaughtered on 24 th day of gestation. In the group of fetuses receiving poor blood supply (≤ 4 blood vessels), the individual weight and the crown-rump were lower (-24.4 and -12.6% respectively; p < 0.05) compared to those with higher number of blood vessels (≥ 5). The intra uterine position affects significantly the individual weight of maternal placenta and the heavier one was located in the oviduct. Significant interaction between parity and the number of blood vessels was recorded for the individual weight of fetal placenta (p < 0.05). Available uterine space was lower in the primiparous, in the middle position and in the class of fetuses with lower blood supply. In primiparous, the horns with 5 or 6 fetuses presented a better vascularization than those with the same number in nulliparous (+25%). The fetal weight and crown-rump decreased when the number of fetus per horn increased (p<0.05). A significant interaction was recorded between the parity and the number of fetus per horn for the weight of maternal placenta (+ 15% and + 30% respectively in the horn within 3 or 5 fetuses in nulliparous; p < 0.05). Available uterine space was greater in nulliparous compared to the primiparous and decreased when the number of fetus per horn increased. These results suggest that available uterine space and fetal development at 24 th of pregnancy are affected respectively by parity of the rabbit and the vascularization of the implantation site.

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Section: Resultsmentioning

confidence: 80%

Section: Resultsmentioning

confidence: 99%

Section: Experimental Design and Measurementmentioning

confidence: 99%

Section: Experimental Design and Measurementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Characterization of Local Algerian Population of Rabbit: Factors Influencing Fetal and Placental Development

Belabbas¹,

ImenIlès²,

Baziz³

et al. 2013

JAS

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Differential development of body equilibrium among littermates in the newborn rabbit

Muciño

Bautista

Jiménez

et al. 2008

Developmental Psychobiology

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Interest is growing among psychobiologists and behavioral ecologists in the role of sibling relations in shaping individual development and life histories. In litters of domestic rabbits Oryctolagus cuniculus the heaviest pups at birth are more likely to survive the critical first postnatal week, they compete more effectively with littermates for milk and well-insulated positions in the litter huddle, and are the heaviest at weaning. Here we report that high birth weight pups are also better able to maintain body equilibrium. Testing pups' ability to maintain equilibrium when placed on a 15 degrees ramp for 2 min each day during the first postnatal week, we found that pups showed a continual daily improvement in their ability to maintain balance while moving on the ramp, rarely lost balance by postnatal day 8, and that heavier pups could maintain balance better and earlier than their lighter littermates. Better ability to maintain body equilibrium, however achieved, may help explain heavier pups' advantage in competing for vital resources such as milk and in gaining access to better-insulated positions in the litter huddle. It also provides further support for the usefulness of birth weight, not only as an absolute measure but also relative to the weight of other littermates, as a predictor of different developmental trajectories, behavioral and physiological, among same-age siblings in this mammal.

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The effect of siblings on early development: A potential contributor to personality differences in mammals

Hudson

Bautista

Reyes-Meza

et al. 2011

Developmental Psychobiology

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Although most mammals grow up in the company of same or different age sibs (or half sibs), surprisingly little attention has been given to how relations among them might influence the development of individual differences in morphology, physiology, and behavior. Here we review evidence from our work on domestic and wild European rabbits, and more recently on laboratory rats, mice, and domestic cats, supporting the proposition that in mammals early sibling relations contribute to the development of individual differences in these three domains and thereby to long-term behavioral differences of the kind we might consider part of an animal's behavioral style or personality. First we report a consistent and marked negative relation between litter size and individuals' body mass at birth and weaning, as well as marked within-litter differences in prenatal body mass and placental efficiency. We then report individual differences in preweaning behaviors associated with these morphological variables such as position occupied in the litter huddle and development of motor ability, as well as physiological differences in thermoregulation, immune parameters, and endocrine indicators of stress. Finally, we report first evidence from wild rabbits that early relations among littermates may have long-term consequences for individual differences in behavioral style. We conclude that in mammals, individual differences in early growth, physiology and behavior potentially important for the development of animal personality, are shaped to an appreciable extent by early sibling relations and that this little-researched field deserves closer attention.

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Relationships between uterine and fetal traits in rabbits selected on uterine capacity1

Cited by 43 publications

References 24 publications

Characterization of Local Algerian Population of Rabbit: Factors Influencing Fetal and Placental Development

Characterization of Local Algerian Population of Rabbit: Factors Influencing Fetal and Placental Development

Differential development of body equilibrium among littermates in the newborn rabbit

The effect of siblings on early development: A potential contributor to personality differences in mammals

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