Peri-puberty in male Criollo horses – testicular development, histology of the seminiferous epithelium and epididymal sperm

Gregory, Joana; Esmeraldino, Anamaria Telles; Moraes, Louise; Luz, D Vianna; McManus, Concepta; Gregory, Ricardo Macedo; Mattos, R.C.; Jobim, Mariana

doi:10.21836/pem20130302

Cited by 3 publications

(3 citation statements)

References 3 publications

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“…Testicular growth occurs gradually and proportional to body growth from the 12th month of life until puberty (NADEN et al, 1990). In Crioulos foals, the first epididymal sperm was reported at 16 months of age, when the testicular volume reached 16 cm 3 and testicular weight of 23 grams (GREGORY, 2013). The number of Sertoli cells, weight and testicular size increase with age, stabilizing when the stallion reaches sexual maturity, about 4-5 years in most breeds (THOMPSON, 1979).…”

Section: Resultsmentioning

confidence: 99%

Body and testicular biometry of Crioulo stallions

2022

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Brazilian Association of Crioulo Horse Breeders (ABCCC) establishes minimal and maximal body biometrics evaluation; although, nothing is mentioned about testicular measurements. Body and testicular growth are associated and related to age. We described data regarding body and testicular biometry of Crioulo stallions, with a comparative study between young and adult categories. Evaluation was performed in 56 stallions, Crioulo breed, split in: youngsters (3 and 4 years-old, n=16) and adults (above 5 years-old, n=40). Body biometry included weight, height, cannon bone and chest circumference, body score condition and neck fat accumulation. Testicular biometry included height, length, width, volume, combined volume and daily sperm output (DSO). Statistical analyses included descriptive statistic, Pearson correlation, comparison between means by Kruskal Wallis, being P < 0.05 considered significant. There was no significant difference between the parameters of body and testicular biometrics between categories young and adult. In relation to height, the average was very close to the lower limit established, while chest and cannon bone circumference were above the minimum recommended by ABCCC. Cannon bone circumference presented a positive correlation with height. Most of stallions presented excessive body fat, with a body score condition above 8 (scale 1-9). Neck fat accumulation presented a positive correlation with body score condition. Testicular height, length, width and volume presented a positive correlation between the ipsi and contralateral testicle, total testicular volume and DSO. In conclusion, no difference in the body and testicular biometric evaluation was observed between young and adult Crioulo stallions. Testicular and body growth are associated and also related to age, so our finding suggested that after 3-4 years-old most of Crioulo stallions have already reached maximum growth.

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Section: Resultsmentioning

confidence: 99%

Body and testicular biometry of Crioulo stallions

2022

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“…Interestingly, almost all terms in German publications were defined in detail, with only one exception (i 1 , Fig. 3A, Patan-Zugaj et al 2013). In English publications, approximately the same number of authors have given the definitions either in written form or with a figure (10 and 12 out of 79, respectively).…”

Section: Definition Of Measuresmentioning

confidence: 99%

“…An example is the word toe/Zehe. It is often used for the Pars dorsalis of the cornified hoof capsule as in "toe length" (Hampson et al 2010, Stachurska et al 2011, Lewis et al 2014, "toe height" (Holroyd et al 2013) or "Zehenlänge" (Patan-Zugaj et al 2013, Thieme et al 2015b). In the anatomical sense, the toe length would be the distance between Articulatio metacarpo-(metatarso-)phalangea and the dorsodistal tip of the hoof capsule.…”

Section: Anatomical and Language Correctnessmentioning

confidence: 99%