Laboratory of Animal Germplasm Conservation - LCGA, Universidade Federal Rural do Semi-Árido - UFERSA, Mossoró, RN, Brazil.
Anim Reprod Sci. 2012 Oct;134(3-4):191-6. doi: 10.1016/j.anireprosci.2012.08.026. Epub 2012 Aug 23.
The aim of this research was to study the individual variation with regard to the morphometry of the testes evaluated by ultrasonography and semen characteristics and to verify the existence of relationship between these variables in collared peccaries. In addition, the testes of the animals were evaluated by histology in order to determine the proportion occupied by the seminiferous tubules. A total of 52 ejaculates were obtained from ten adult specimens that had been restrained by anesthesia. The testicular measurements (length, height, and width) were performed by ultrasonography, and the testicular volume was calculated according to Lambert's formula. The scrotal circumference was measured by encircling the thickest portion of the testicle with a graduated nylon tape. The semen was collected by electroejaculation. Testicular fragments were analyzed through classic histology for the determination of the area occupied by the seminiferous tubules. The results show a great amount of individual variation with regard to testicular morphometry and semen characteristics. No significant correlations were obtained between testicular measurements and semen characteristics. The histometric analysis revealed that 67.8% of the testes are occupied by seminiferous tubules. Results show that the measurement of testicular dimensions does not serve as an indicator of the quality of semen obtained by electroejaculation in collared peccaries, as there is no correlation between testicular morphometry and semen characteristics in this species that presents large variations among individuals.
本研究旨在研究通过超声评估睾丸形态学和精液特征的个体差异，并验证这些变量在颈带野猪之间的关系。此外，还通过组织学评估动物的睾丸，以确定生精小管所占的比例。从 10 只被麻醉束缚的成年个体中获得了总共 52 次精液。通过超声测量睾丸的（长、高和宽），并根据 Lambert 公式计算睾丸体积。通过用带刻度的尼龙带环绕睾丸最厚部分来测量阴囊周长。通过电刺激射精收集精液。通过经典组织学分析睾丸碎片，以确定生精小管所占的区域。结果表明，睾丸形态学和精液特征存在大量个体差异。睾丸测量值和精液特征之间没有获得显著相关性。组织学分析显示，67.8%的睾丸被生精小管占据。结果表明，在颈带野猪中，睾丸尺寸的测量不能作为电刺激射精获得的精液质量的指标，因为在这种个体之间存在大量变异的物种中，睾丸形态学和精液特征之间没有相关性。
