Daily sperm production and testicular morphometry in goats according to external scrotal conformation

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• 作者：A.A.N.  ; Machado Junior^a ;   ; ^{machadojunior2@yahoo.com.br} ; A.C.  ; Assis Neto^b ; A.  ; Sousa Junior^c ; D.J.A.  ; Menezes^d ; F.R.  ; Alves^a ; A.L.  ; Sousa^e ; M.A.M.  ; Carvalho^f
• 关键词：Bipartite scrotum ; Histometry ; Sperm production ; Goat
• 刊名：Animal Reproduction Science
• 出版年：2011
• 出版时间：August 2011
• 年：2011
• 卷：127
• 期：1-2
• 页码：73-77
• 全文大小：216 K

文摘

The present study aimed to compare testicular histology and the testicular cell population as well as spermatogenic efficiency in goats with different scrotal conformations. Eighteen goats were divided into 3 groups: Group I ?goats without bipartition of the scrotum, Group II ?animals with bipartition of the scrotum up to 50 % of the testicular length, Group III ?goats with scrotal bipartition more than 50 % of the testicular length. In goats in Groups I, II and III, the values for the volume density of seminiferous epithelium were 68.9 ¡À 0.6 % , 71.5 ¡À 2.8 % and 73.4 ¡À 4.7 % (P < 0.05), the height of the seminiferous epithelium were 60.2 ¡À 4.9 ¦Ìm, 61.0 ¡À 5.0 ¦Ìm and 73.1 ¡À 6.6 ¦Ìm (P < 0.05), total length of seminiferous tubules found for Groups I, II and III were 2091.9 ¡À 27 m, 2172.5 ¡À 24.1 m, and 2340.1 ¡À 14 m (P < 0.05), number of Sertoli and Leydig cells were 1.8 ¡À 0.4 ¡Á 10⁹ and 1.4 ¡À 0.1 ¡Á 10⁹, 2.2 ¡À 0.4 and 2.2 ¡À 0.7 ¡Á 10⁹, and 2.5 ¡À 0.1 10⁹ and 2.3 ¡À 0.5 10⁹ (P < 0.05) and daily sperm production observed were 2.1 ¡À 0.3 ¡Á 10⁹, 2.8 ¡À 0.4 ¡Á 10⁹, and 3.1 ¡À 0.7 ¡Á 10⁹ (P < 0.05). In conclusion, goats with greater scrotal bipartition have a greater capacity to produce reproductive cells that is reflected in a greater reproductive potential.