Anatomo-Histological Evaluation of Male Reproductive System of the Juvenile Caiman crocodilus yacare

Autor(es)

Takamine, Cristiane Naoko ^{[1, 2]} ; Costa de Carvalho, Hianka Jasmyne ^{[1, 2]} ; Araujo, Michelle Silva ^{[1, 2]} ; Ribeiro, Rafaela Rodrigues ^{[1, 2]} ; Miglino, Maria Angelica ^{[1, 2]} ; Ferraz de-Melo, Alan Peres ^{[3, 4]}

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Sch Vet Med & Anim Sci, Dept Surg, Ave Prof Dr Orlando Marques Paiva 87, Sao Paulo, SP - Brazil

^[2] Ave Prof Dr Orlando Marques de Paiva 87, Sao Paulo, SP - Brazil

^[3] Paulista State Univ Julio Mesquita Filho, Dept Anim Sci, Sao Paulo - Brazil

^[4] Ave Prof Paulo Donato Castellane, BR-14884900 Jaboticabal - Brazil

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF MORPHOLOGY; v. 39, n. 6, p. 1688-1693, DEC 2021.
• Citações Web of Science: 0

Resumo

SUMMARY: The Caiman crocodilus yacare was once close to extinction. Studies about the male reproductive tract may aid in their reproduction and conservation. In this work, after sedation and euthanasia, seven young male C. yacare were submitted to necropsy, and macroscopic evaluation of the reproductive system, while the three others were admitted for histological study. The histological sections were stained with Hematoxylin & Eosin and Masson's Trichrome. After opening the pleuroperitoneal cavity it was possible to identify that the testicles were disposed in pairs and attached to its dorsal surface. The epididymis showed elongated and convoluted shapes and were located at the cranial margin of the testicles, following its medial portion, which was the same portion that the “vas deferens” stems from until the opening of the cloaca. The crocodile phallus presented a tubular shape, with conical appearance, displaying little resistance while maintaining its flexibility, compatible with a fibrocartilaginous tissue. On light microscopic analysis it was possible to observe that the testis was delimited by the tunica albuginea. The seminiferous tubules were contorted, and the interstitial space was filled with interstitial tissue and Leydig cells. The epididymal ductus were covered with non-ciliated pseudostratified epithelium with cells varying between cuboidal and prismatic shapes. The ductus deferens were characterized by a narrow girth shrouded with non- ciliated pseudostratified prismatic epithelium. The phallus of the crocodile was covered with a non-keratinized squamous epithelium surrounded by connective tissue. The findings support anatomic and histologic knowledge Alligatoridae reproductive system, enabling further research in the C. yacare reproduction and conservation. (AU)

• Processo FAPESP: 03/10397-3 - Aspectos macro e microscopico dos orgaos genitais masculinos no jacare (caiman crocodylus yacare - daudin, 1802).
• Beneficiário: Cristiane Naoko Takamine
• Modalidade de apoio: Bolsas no Brasil - Mestrado