Spermatogenic Cycle Length and Sperm Production in a Feral Pig Species (Collared Peccary, Tayassu tajacu)
Spermatogenic Cycle Length and Sperm Production in a Feral Pig Species (Collared Peccary, Tayassu tajacu)
复制标题
DOI：
10.2164/jandrol.109.008524
复制
发表时间：
2010-03-01
影响因子：
--
通讯作者：
Franca, Luiz R.
中科院分区：
文献类型：
--
作者：
Costa, Guilherme M. J.;Leal, Marcelo C.;Franca, Luiz R.
虽然领野猪（Tayassu tajacu）在整个美洲都有发现，具有很高的驯化和商业开发潜力，但关于这种哺乳动物物种的生殖生物学数据很少。本研究的目的是探讨睾丸结构，生精周期长度，支持细胞效率，生精效率。12个成年peccaries用于生物统计学，组织学和体视学分析，这些peccaries 3接受睾丸内注射H-3-胸苷的精子发生的持续时间的测定。睾丸重量和性腺指数分别为23.7 ± 1.8 g和0.2% ± 0.1%。生精小管体积密度为77.4% +/-1.7%。睾丸间质细胞占睾丸实质的12.8% ± 1.8%，在生精小管叶的周围呈现出独特的细胞结构。减数分裂前，减数分裂，减数分裂后阶段的频率是非常相似的野生和国内公猪。生精周期和整个生精过程（基于4.5个周期）分别持续约12.3 +/- 0.2和55.1 +/- 0.7天。有领野猪每克睾丸每日精子产量约为23.4 +/- 2 x 10（6），与家养野猪和野猪的精子产量相似。本研究中产生的知识可用于繁殖和动物改良计划，并提供了重要的信息，可用于与以前调查的哺乳动物物种的比较生殖生物学。
Although the collared peccary (Tayassu tajacu) is found throughout the Americas, with a high potential for domestication and commercial exploitation, there are few data on the reproductive biology of this mammalian species. The aim of the present study was to investigate testis structure, spermatogenic cycle length, Sertoli cell efficiency, and spermatogenic efficiency. Twelve adult peccaries were used for biometrical, histological, and stereological analyses; 3 of these peccaries received intratesticular injections of H-3-thymidine for the determination of the duration of spermatogenesis. Testis weight and gonadosomatic index were 23.7 +/- 1.8 g and 0.2% +/- 0.1%, respectively. Seminiferous tubule volume density was 77.4% +/- 1.7%. Leydig cells occupied 12.8% +/- 1.8% of the testis parenchyma and presented a peculiar cytoarchitecture in the periphery of the seminiferous tubule lobes. The premeiotic, meiotic, and postmeiotic stage frequencies were very similar to those found for wild and domestic boars. The spermatogenic cycle and entire spermatogenic process (based on 4.5 cycles) lasted approximately 12.3 +/- 0.2 and 55.1 +/- 0.7 days, respectively. Daily sperm production per gram of testis in the collared peccary was approximately 23.4 +/- 2 x 10(6), which is similar to that of domestic and wild boars. The knowledge generated in the present study could be used in reproduction and animal improvement programs and provides important information that may be used for comparative reproductive biology with previously investigated mammalian species.