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Because of few available data on semen parameters in small breed dogs, the study aimed to analyse semen and measure testes of dogs < 10.0 kg bodyweight. Semen was collected from 41 fertile stud dogs which were divided based on bodyweight: group 1 < 5.0 kg, and group 2 between 5.1 and 10.0 kg. Median values for ejaculate volume (group 1: x ̃ 1.2 mL; group 2: x ̃ 2.2 mL), total sperm output (group 1: x ̃ 110.7 x 106; group 2: x ̃ 215.1 x 106) and testicular volume (group 1: left testicle x ̃ 2.8 mL, right testicle x ̃ 2.7 mL ; group 2: left testicle x ̃ 5.5 mL, right testicle x ̃ 5.0 mL) were lower in group 1 compared to dogs of group 2 (P = 0.001; P = 0.001; both testes: P < 0.001). There was no difference in sperm concentration (P = 0.985). Based on these results introduction of an additional weight group to the commonly used reference values is recommended, since values for ejaculate volume, total sperm output and testicular dimensions for dogs < 5.0 kg bodyweight differed significantly from values of dogs with a bodyweight from 5.1 to 10.0 kg.
This article was published in the following journal.
Name: Reproduction in domestic animals = Zuchthygiene
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Animals which have become adapted through breeding in captivity to a life intimately associated with man. They include animals domesticated by man to live and breed in a tame condition on farms or ranches (e.g., horses, cattle, sheep) and those raised or kept for pleasure and companionship (e.g., dogs, cats, horses).
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Scattering of a beam of electromagnetic or acoustic RADIATION, or particles, at small angles by particles or cavities whose dimensions are many times as large as the wavelength of the radiation or the de Broglie wavelength of the scattered particles. Also know as low angle scattering. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed) Small angle scattering (SAS) techniques, small angle neutron (SANS), X-ray (SAXS), and light (SALS, or just LS) scattering, are used to characterize objects on a nanoscale.
A condition characterized by the complete absence of SEMEN. This disorder should be differentiated from AZOOSPERMIA, absence of sperm in the semen.
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