Epididymal morphophysiology of adult collared peccaries (Pecari tajacu)

  • Anna Patrycia Martins de Oliveira Universidade Federal do Pará, Instituto de Ciências Biológicas, Laboratório de Reprodução Animal
  • Deise de Lima Cardoso Universidade Federal do Pará, Instituto de Ciências Biológicas, Laboratório de Reprodução Animal
  • Ana Cássia Sarmento Ferreira Instituto Federal do Pará
  • Maria Auxiliadora Pantoja Ferreira Universidade Federal do Pará, Instituto de Ciências Biológicas, Laboratório de Técnicas Histológicas
  • Natália Inagaki de Albuquerque Embrapa Amazônia Oriental
  • Otávio Mitio Ohashi Universidade Federal do Pará, Instituto de Ciências Biológicas, Laboratório de Reprodução Animal
  • Diva Anelie Guimarães Universidade Federal do Pará, Instituto de Ciências Biológicas, Laboratório de Reprodução Animal
Keywords: Epididymis, Spermatozoon, Histology, Morphology, Pecari tajacu

Abstract

A functional understanding of the epididymis makes it possible to increase a species’ fertility, since it facilitates the preservation of gametes for use in assisted reproduction techniques. This study analyzed the histological features of the different regions of the epididymis of the Pecari tajacu and the associated pathologies found in the spermatozoa present in this organ. After an orchiectomy surgery to remove the testicles and epididymis obtained from eight adult animals bred in captivity, fixation and histological processing of samples were carried out. The presence of pseudostratified columnar epithelium with stereocilia was observed in all regions of the epididymis (caput, corpus and caudal). Similarities were noted between the average height of the corpus and caudal epithelium, which differed from that found at the caput (1- proximal: region associated with the efferent ducts; 2- distal: region associated with corpus epididymis). It was also observed that the proximal caput presents a smaller average of the tubules diameter compared to other portions of the epididymis. Regarding pathologies of the spermatozoa, thirteen different types of morphological modifications were observed. Underdeveloped spermatozoa and detached heads were most frequently encountered along the epididymis of the collared peccaries. This study is a pioneer in the area and its data will serve as a basis for comparative research on the reproductive biology of artiodactyls, thus contributing to their conservation and reproduction.

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Published
2016-09-26
How to Cite
Oliveira, A. P., Cardoso, D., Ferreira, A. C., Ferreira, M. A., Albuquerque, N., Ohashi, O., & Guimarães, D. (2016). Epididymal morphophysiology of adult collared peccaries (Pecari tajacu). Brazilian Journal of Veterinary Research and Animal Science, 53(3), 251-259. https://doi.org/10.11606/issn.1678-4456.bjvras.2016.108493