The Department of Animal Anatomy of the Central School of Agriculture, Warsaw

Krysiak, Kazimierz

doi:10.4098/at.arch.60-25

Cited by 1 publication

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“…In cattle it takes place as early as the third month of prenatal development (Bielañski 1962, Johnson et al 1970, Krysiak and OEwie¿yñski 1983. Disturbances in the process of testis descent (cryptorchidism) have been observed in many domestic and wild mammal species (Zhedenov 1965, Amann andVeeramachaneni 2007).…”

Section: Cryptorchidism and Asymmetry Of Testesmentioning

confidence: 99%

Changes of weight and size of European bison testes during postnatal development

et al. 2009

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2009. Changes of weight and size of European bison testes during postnatal development. Acta Theriologica 54: 111-126.The material for this study was obtained from culled European bison (Linnaeus, 1758) originating from both captive breeding and free-ranging populations in Bia³owie¿a and Borecka Forests (north-east Poland), and was mostly collected from November until April. Mass difference between the right and left testis of the same individual up to 30% was considered to be physiological asymmetry, which proved typical of the species. Hypoplasia or atrophy of the testes exceeding 30% in size, were found in 37 males (13.6% of the examined animals; n = 272). Cryptorchidism was recorded in 20 bison culled in Bia³owie¿a Forest at the age over 1 year (10.6% of individuals at the same age; n = 188). We registered the weight of testes of 259 males aged 2 months to 20 years. In the examined males, no distinct predominance in size and weight between the right and left testes was observed. The weight of testes was significantly correlated with age (r = 0.85, p < 0.0001) and body weight (r = 0.93, p < 0.0001). The heaviest testicles belonged to older and sexually mature bulls aged 6-12 years (mean 216 g) and to old ones over 13 years (mean 242 g). Two testis measurements (length and width) were taken from 136 culled males, while two additional measurements (total length with the cauda of epididymis and circumference) from 65 males. The length and width of the testes were moderately correlated with age (r = 0.31 and r = 0.20, p < 0.01) and highly significantly correlated with testis (r = 0.79, p < 0.001) and body weight (r = 0.92, p < 0.001).

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Section: Cryptorchidism and Asymmetry Of Testesmentioning

confidence: 99%