Buck effect on rabbit oestrous: vulva colour, vaginal lumen cells and ovarian follicle populations

Ola, Safiriyu Idowu; Oyegbade, M. O.

doi:10.4995/wrs.2012.1081

Cited by 8 publications

(8 citation statements)

References 33 publications

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“…This behavior in morphometric dynamics of the ovary in relation to the color of the vulva can signal the effect that the weaning stimulus has and the different way in which does respond depending if they are primiparous or multiparous. Furthermore, the intense red of the vulva of the second and third parturition females suggest that they were receptive to males, as shown in previous studies (Díaz et al;Cano et al, 2005;Ola & Oyegbade, 2012).…”

Section: Discussionsupporting

confidence: 76%

Macroscopic Morphometric Analysis of Genital Organs of Rabbit does with Differing Parturitions at 24 Hours Post-weaning

et al. 2013

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SUMMARY:The purpose of this study was to analyze the macroscopic morphometry of the ovaries, uterus and vagina in rabbit does in the first, second and third parturition at 24 hours post-weaning in order to determine if there are differences between parturitions. Weaning of the litter was performed at 30 days post-partum and 24 hours later the does were euthanized. Right and left ovaries, uterine horns-cervix and vagina were removed, and the length of each one was measured. Significant differences were found in the average of the right ovary length between the first group with respect to second and third parturition group (P ≤ 0.05 and P ≤ 0.01). Also, left ovary length was different between the first and second with respect to third parturition group (P <0.001). Average total ovary length increased significantly as the number of parturitions increased in second and third parturition groups (P ≤ 0.01 and P≤0.001). The weight of the left and right ovaries was higher in does in their second and third parturition when compared to those in their first (P≤ 0.5; P≤ 0.01). The average total ovary weight increased significantly as the number of parturitions in second and third parturition groups (P≤0.001). The length of the left and right uterine horn-cervix of the rabbits after second and third parturition decreased when compared to that of females in their first parturition (P≤ 0.05; P≤0.001). The average total uterine horns-cervix length decreased significantly as the number of parturitions in second and third parturition groups (P≤0.001). Furthermore, vagina length in females in their third parturition was greater than that of first and second parturition (P≤ 0.01).The color of the vulva of the majority of females in their first parturition (3/4) was pale pink while. In contrast, the majority of females in their second parturition (3/4) had their vulva intensely red. All of the females (4/4) in the third parturition group had their vulva intensely red. We conclude that in female rabbits the macroscopic morphometric characteristics of ovaries, uterus and vagina, at 24 hours post-weaning vary according to the number of parturitions.

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Section: Discussionsupporting

confidence: 76%

Macroscopic Morphometric Analysis of Genital Organs of Rabbit does with Differing Parturitions at 24 Hours Post-weaning

et al. 2013

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“…35 Researchers proposed that visual stimuli, in conjunction with acoustic and olfactory stimuli, with an intact male may play a role in ovulation in rabbits. 36 In our study, female rabbits were in complete isolation from male rabbits throughout both experiments. Whether pheromones play a role in the induction of ovulation in rabbits remains unclear.…”

Section: Discussionmentioning

confidence: 99%

In vivo imaging in the rabbit as a model for the study of ovulation-inducing factors

2014

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The study of factors responsible for eliciting ovulation in rabbits has been hampered by the lack of a suitable method of monitoring the ovaries in vivo. Ovarian imaging by ultrasound biomicroscopy was used in two experiments designed to determine the effects of seminal plasma on the ovulatory response in rabbits. In Experiment 1, female rabbits were group-housed and treated intramuscularly with saline, gonadotropin releasing hormone (GnRH), or seminal plasma of llamas or rabbits (n = 4 to 6 per group). Rabbits were euthanized eight days later to evaluate the ovarian response by ultrasound biomicroscopy ex situ. No differences among groups were detected in the proportion of rabbits that ovulated or in the number and size of corpora lutea. The high incidence of ovulation in the negative control group was unexpected, and confounded determination of an ovulation-inducing effect of seminal plasma. In Experiment 2, female rabbits were caged individually, and treated as in Experiment 1 (n = 5 to 7 per group). The ovarian response was evaluated in vivo by transcutaneous ultrasound biomicroscopy. Ovulation and formation of corpora lutea were detected only in rabbits given GnRH. A preovulatory surge in plasma luteinizing hormone concentration and a post-ovulatory rise in plasma progesterone concentration were detected only in rabbits treated with GnRH. Surgical translocation of the ovaries to a subcutaneous position enabled longitudinal assessment of the ovulatory response by ultrasound biomicroscopy. Results clearly documented the effect of physical/social interaction on ovulation in rabbits, and did not support the hypothesis that seminal plasma elicits ovulation in rabbits.

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“…In rabbits, 'male effect' appears to slightly improve doe reproductive performance [20]. However, significant effects were only found in does at first lactation [21] and published data have been contradictory [44,45], hampering consistent conclusions.…”

Section: Social Interaction Seems Not Influencing Reproductive Physiology In Farm Female Doementioning

confidence: 99%

Assessment of Biostimulation Methods based on Chemical Communication in Female Doe Reproduction

Villamayor¹,

Gullón²,

Yáñez³

et al. 2022

Preprint

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Biostimulation is an animal management practice that helps improve reproductive parameters by modulating animal sensory systems. Chemical signals, mostly known as pheromones, have a great potential in this regard. This study was conducted to determine the influence of short-term female rabbit exposure to different conditions, mainly pheromone-mediated, on reproductive parameters of inseminated does. Groups of 60 females/each were exposed to 1) female urine, 2) male urine, 3) seminal plasma and 4) female-female interaction, just before artificial insemination, and compared to isolated females controls (female-female separated). The following reproductive parameters were analyzed for each group: receptivity (vulvar color), fertility (calving rate), prolificacy and number of born alive and dead kits &frasl; litter. Our results showed that the biostimulation methods employed in this experiment did not significantly improve any of the analyzed parameters. However, female doe exposure to urine, especially to male urine, slightly increased fertility levels when compared to the rest of the experimental conditions. Female-female interaction before artificial insemination, which is a common practice in rabbit farms, did not have any effect, which suggests its removal to avoid unnecessary animal management and time cost. On the other hand, fertility ranges were lower for animals with pale vulvar color whereas no differences were noticed among the other three colours which measure receptivity (pink, red, purple), thus suggesting that these three colours could be grouped together. Additionally, equine chorionic gonadotropin injection could be replaced with various biostimulation methods, therefore reducing or replacing current hormonal treatments, and contributing to animal welfare and to a natural image of animal production.

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Buck effect on rabbit oestrous: vulva colour, vaginal lumen cells and ovarian follicle populations

Cited by 8 publications

References 33 publications

Macroscopic Morphometric Analysis of Genital Organs of Rabbit does with Differing Parturitions at 24 Hours Post-weaning

Macroscopic Morphometric Analysis of Genital Organs of Rabbit does with Differing Parturitions at 24 Hours Post-weaning

In vivo imaging in the rabbit as a model for the study of ovulation-inducing factors

Assessment of Biostimulation Methods based on Chemical Communication in Female Doe Reproduction

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