Testis developments and puberty in the male Tokara (Japanese native) goat

Shotaro Nishimura, K. Okano, K. Yasukouchi, Takafumi Gotoh, Shoji Tabata, H. Iwamoto

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

In male Tokara (Japanese native) goats, testis development and the onset of puberty were studied histologically and observing sexual behaviour. Testes weight increased from 36 ± 5.4(S.E.) g (n = 5) at 3 months of age to 126±6.3 g (n = 6) at 12 months. The degree of the testis development differed among kids at 3 months of age and only one of four had produced spermatozoa in the testis. Large number of spermatozoa were always present in seminiferous tubules and epididymal ducts from 4 months of age. The diameter of seminiferous tubules increased from 133 ± 9.9 μm (n = 4) at 3 months to 198 ± 1.0 μm (n = 3) at 6 months with little increase thereafter. Mounting and pelvic thrusts onto a teaser doe started at from 9 to 14 weeks of age. Ejaculated semen contained sperm with good motility for the first time from 17 weeks. The male Tokara goat reaches puberty at around 4 months of age but testis development continues to 12 months. (C) 2000 Elsevier Science B.V.

Original languageEnglish
Pages (from-to)127-131
Number of pages5
JournalAnimal Reproduction Science
Volume64
Issue number1-2
DOIs
Publication statusPublished - Dec 1 2000

All Science Journal Classification (ASJC) codes

  • Food Animals
  • Animal Science and Zoology
  • Endocrinology

Fingerprint Dive into the research topics of 'Testis developments and puberty in the male Tokara (Japanese native) goat'. Together they form a unique fingerprint.

  • Cite this