Alguns aspectos biométricos do aparelho genital externo de jumentos doadores de sêmen da raça Pêga

Translated title of the contribution: Some biometric aspects of the external genital tract from donkey Pêga breed semen donors

Igor Frederico Canisso, Giovanni Ribeiro de Carvalho, Erotides Capistrano da Silva, Aline Luciana Rodrigues, Pedro Game Ker, José Domingos Guimarães

Research output: Contribution to journalArticlepeer-review


The present study was performed with six Pêga breed donkeys, weight from 231 to 326kg (272±34.9). The breeders were divided into the adult group (J1, J2 e J3, 15 years old average) and the young group (J4, J5 e J6, 3.5 years old average).. The donkeys presented normal rates of fertility at natural mating. After breeding soundness evaluation all animals were considered capable for reproduction. A hundred eight semen collections were realized, and the donkeys presented normal seminal parameters for the specie. From August/2006 to February/2007, after semen collection each donkey was submitted to three or four measurements of the extern genital tract (both right and left side) for: testis length (LT - cranio caudal); testis height (TH - dorso ventral) and thickness of spermatic funiculum (FUN - third part). The biometric data from biometric testis were used to calculate the testis indices (TI) and testis volume (TV). The TI observed was 7.4 (5.9 a 9.6) and TV was 155.5±14.4, 149.3±14.9 respectively left and right. The average FUN was 25.3±3.3mm (20.3 a 30.8mm) to the right and 24.6±1.5mm (22 a 26mm) to the left side. The donkeys presented lesser TI than those proposed for the stallions, but the asinine were more efficient for sperm production than the average reported to stallions. The testis volume associated with IT can be used as an additional tool to estimate the normality of the breeder's testis. The measurement in vivo of spermatic funiculum can be used as a new component for the breeding soundness evaluation of donkeys. The genital extern tract biometric values can support routine breeding evaluation and can be applied to news studies.

Translated title of the contributionSome biometric aspects of the external genital tract from donkey Pêga breed semen donors
Original languagePortuguese
Pages (from-to)2556-2562
Number of pages7
JournalCiencia Rural
Issue number9
StatePublished - 2009
Externally publishedYes


  • Biometric
  • Testicular indices
  • Volume

ASJC Scopus subject areas

  • Animal Science and Zoology
  • Agronomy and Crop Science
  • veterinary(all)


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