Effects of breed, age, season, and multiple ovulations on cyclic, PGF2α-induced, and postpartum estrus characteristics in Spanish jennies

Marı́n, C.; Galisteo, I.; Pérez-Rico, A.; Galisteo, J.

doi:10.1016/j.theriogenology.2015.11.015

Cited by 17 publications

(20 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the incidence of double ovulation in this study was lower than that reported in spontaneous (51.7%) and PGF2α-induced cycles (56.5%) in Andalusian jennies [30]. It is interesting to note that single ovulation occurred with equal frequency on both ovaries, as also reported by other authors [30,34]. Similar to that reported by Taberner et al [34], a minimally greater frequency of ovulation for the left ovary was found (42.5% vs. 32.5%), but the difference was not significant.…”

Section: Discussioncontrasting

confidence: 84%

“…Double ovulation in jennies was similar to that reported in Catalonian jennies (42.45%) [34] and in the Asinina de Miranda jennies (36.36%) [38]. However, the incidence of double ovulation in this study was lower than that reported in spontaneous (51.7%) and PGF2α-induced cycles (56.5%) in Andalusian jennies [30]. It is interesting to note that single ovulation occurred with equal frequency on both ovaries, as also reported by other authors [30,34].…”

Section: Discussionsupporting

confidence: 81%

“…In this study, in which 26 donor jennies and 124 cycles were used, the average ovulation rate per jenny was 1.26 ± 0.04. This finding was slightly lower than the reported average in spontaneous (1.57 ± 0.06) and prostaglandin F2 alpha (PGF2α)-induced (1.56 ± 0.10) estrus of Andalusian jennies [30]. These small differences could be explained by other factors (such as feeding management, donor age, reproductive status, season of the year, and the use of drugs to induce ovulation) that can affect the incidence of multiple ovulations, as reported in mares [22,[31][32][33] and donkeys [30,34].…”

Section: Discussioncontrasting

confidence: 56%

See 2 more Smart Citations

Factors Affecting Embryo Recovery Rate, Quality, and Diameter in Andalusian Donkey Jennies

Dorado

Bottrel

Ortiz

et al. 2020

Animals

View full text Add to dashboard Cite

Embryo transfer and the vitrification of embryos could be used for the conservation and recovery of endangered donkey breeds. It is important to develop techniques that optimize recovery rates and the cryotolerance of donkey embryos. This study evaluates factors affecting the recovery rate, quality, and diameter of embryos obtained from donor jennies as a starting point for the use of vitrification and embryo transfer in the conservation of the Andalusian donkey. A total of 100 embryos were recovered out of 124 estrous cycles (80.6%). The donor jenny affected the rates of positive flushings (PFR; p = 0.040) and embryo recovery (ERR; p < 0.05) as well as embryo quality (p = 0.004). ERR was also affected by the number of flushings (p < 0.001), donor age (p < 0.05), successive cycle within donor (p < 0.001), and jacks (p < 0.05). Number of flushings (p < 0.001) and jack (p < 0.05) had a significant effect on PFR, whereas the day of flushing influenced the developmental stage (p < 0.001), embryo quality (p < 0.05), and diameter of embryos (p < 0.001). The number of flushings significantly influenced the diameter (p = 0.038) and embryo developmental stage (p = 0.001), whereas the developmental stage was statistically different between herds (p = 0.020). The factors influencing the success of this assisted reproductive technique were donor jenny, donor age, successive cycle within donor, day of flushing, number of flushings, and jack. The identification of these key points is crucial to achieve a higher efficiency of embryo transfer and vitrification processes, before considering their application in the conservation of endangered donkey breeds.

show abstract

Section: Discussioncontrasting

confidence: 84%

Section: Discussionsupporting

confidence: 81%

Section: Discussioncontrasting

confidence: 56%

See 1 more Smart Citation

Factors Affecting Embryo Recovery Rate, Quality, and Diameter in Andalusian Donkey Jennies

Dorado

Bottrel

Ortiz

et al. 2020

Animals

View full text Add to dashboard Cite

show abstract

“…The jennies raised in southern Wisconsin had a lower proportion of ovulation in December (64%) than in the other months (82% to 100%) (Ginther et al, 1987). However, Perez‐Marin et al found that higher ovulation rates happened from September to January in Spanish jennies (Perez‐Marin et al, 2016). There was a higher incidence of anovulation associated with the dry season of tropical jennies in central Ethiopia, and the incidences of single ovulations were 52%, 77.8% and 62.5% during the dry, short rainy and long rainy seasons (Lemma et al, 2006).…”

Section: Discussionmentioning

confidence: 99%

“…Age maybe a factor affecting the duration of oestrus signs that old jennies (11–17 years) showed longer IOI than younger jennies (3–5 years) (Perez‐Marin et al, 2016). In Asinina de Miranda jennies, older animals also displayed longer IOI (Quaresma & Payan‐Carreira, 2015).…”

Section: Discussionmentioning

confidence: 99%

Characteristics of follicular dynamics and reproductive hormone profiles during oestrous cycles of jennies over an entire year

Yang

Li³

et al. 2021

Reprod Domestic Animals

View full text Add to dashboard Cite

Although donkeys have been domesticated for over 6,000 years, limited information is available concerning their reproductive physiology, especially under intensive rearing conditions. The aims of this experiment were to study follicular dynamics and reproductive hormone variation in jennies during the inter‐ovulatory interval in different seasons. A total of 12 continuous cycles of six Dezhou Black (DB) donkey jennies were examined in four different seasons. The diameters of the six largest follicles of each jenny were measured daily by ultrasonography, and blood samples were collected at fixed times for reproductive hormone assays. The results demonstrated that most jennies displayed regular oestrous cycles in all seasons. The follicular dynamics were similar in Spring, Summer and Winter, while the jennies had longer oestrous cycles with delayed follicular deviation and dominant selection in Autumn. At least two follicular waves were observed in each oestrous cycle, throughout the study, but two jennies presented oestrous cycles with three follicular waves in the Autumn. The numbers of follicular waves were consistent with the numbers of FSH surges. Oestrous characteristics of the jennies in a large herd were also analysed. The results showed that the rates of regular oestrous cycles were 83.1% (265/319), 89.6% (215/240), 80.2% (235/293) and 77.1% (178/231), with 26.4% (70/265), 19.5% (42/215), 22.1% (52/235) and 23.0% (41/178) double ovulation rates in Spring, Summer, Autumn and Winter, respectively. The results presented may be useful for donkey farms in the design of breeding strategies.

show abstract

Key Aspects of Donkey and Mule Reproduction

Canisso

Panzani

Miró

et al. 2019

Veterinary Clinics of North America: Equine Practice

View full text Add to dashboard Cite

Effects of breed, age, season, and multiple ovulations on cyclic, PGF2α-induced, and postpartum estrus characteristics in Spanish jennies

Cited by 17 publications

References 22 publications

Factors Affecting Embryo Recovery Rate, Quality, and Diameter in Andalusian Donkey Jennies

Factors Affecting Embryo Recovery Rate, Quality, and Diameter in Andalusian Donkey Jennies

Characteristics of follicular dynamics and reproductive hormone profiles during oestrous cycles of jennies over an entire year

Key Aspects of Donkey and Mule Reproduction

Contact Info

Product

Resources

About