Banca de DEFESA: ANDREA MAGALHAES BEZERRA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE : ANDREA MAGALHAES BEZERRA
DATA : 17/07/2019
HORA: 09:00
LOCAL: auditório ISPA
TÍTULO:

Oropharingeal morphology and smell gland in wild muçuã (Kinosternon scorpioides scorpioides Linnaeus, 1766)

PALAVRAS-CHAVES:

Taste bud; Scent gland; Mucous gland; Marajó Island; Kinosternidae; Microridges; Microvilli; mud turtle.

PÁGINAS: 50
GRANDE ÁREA: Ciências Agrárias
ÁREA: Medicina Veterinária
RESUMO:

The muçuã, as the Kinosternon scorpioides scorpioides is known, is the only representative of the Kinosternidae family in Brazil. It is a chelonium with a 15 cm long carapace length as an adult. Its carapace has three longitudinal keels and the plastron is articulated, being able to move and completely or partially close the carapace. Semiaquatic habit, his diet in free life includes a wide variety of food of plant and animal origin, being considered omnivorous or generalist opportunist. However, to withstand summer drought, when climatic and food conditions are unfavorable, the muçuã remains buried beneath the soil, in a state of low metabolism and consuming energy reserves, in a mechanism known as “estivação”. Another peculiarity of the muçuã is to secrete a substance that exudes a strong and characteristic odor produced by scent glands, which is intended to repel predators, but can also be used as a sexual attraction. In spite of the bad smell that exudes, the species is appreciated as a delicacy in the cuisine of the northern region of Brazil, where the disorderly exploitation has caused substantial decline in natural populations. The present study aimed to describe the morphological aspects of the oropharyngeal cavity and the mucilage smell gland. The animals were collected in naturally occurring areas, in the Marajó Meso-region in the state of Pará / Brazil. Light microscopy revealed that almost all of the lining epithelium of the oropharyngeal cavity is of the nonkeratinized mucosal stratified type, containing many mucosal cells and numerous mucus glands along all lingual epithelium, palate and floor of the oral cavity, except for the region next to the ranifoteca, which is constituted by stratified keratinized squamous epithelial tissue containing several gustatory buds. Scanning electron microscopy showed that all the epithelium of the oropharyngeal cavity presented pores, grooves, micro villi and micro crests. All four specimens analyzed, regardless of sex, were found in four glands, two axillary pairs and two inguinal pairs, structurally similar to each other. Each gland consisted of a single lobe secretory holocrine secretion containing cells formed by two types of secretory vacuoles. Type 1 flushed red, were the largest and most frequent, and were positive for Schiff's Periodic Acid (PAS), suggesting to be a glycoprotein complex and type 2, translucent, smaller and smaller number and negatives for SBP, suggesting a lipid constitution. The secretion produced was carried by a single duct through a bony canal existing in the bridge that connects the carapace to the plastron and excreted by an outer pore located in the respective shield that gives name to the gland. Although the openness to captive breeding provided by legislation is extremely important, it is necessary to develop research that fills the gaps of knowledge about the species and that makes possible its creation for production.

MEMBROS DA BANCA:
Presidente - 1733442 - ANA RITA DE LIMA
Interno - 388501 - WASHINGTON LUIZ ASSUNCAO PEREIRA
Externo ao Programa - 1550251 - FERNANDA MARTINS HATANO
Externo ao Programa - 2297518 - ANA SILVIA SARDINHA RIBEIRO
Externo à Instituição - DIVA ANELIE GUIMARÃES - UFPA
Externo à Instituição - VERONICA REGINA LOBATO DE OLIVEIRA BAHIA - UFPA
Externo à Instituição - JOSÉ LEDAMIR SINDEAUX NETO - UFRA