Banca de QUALIFICAÇÃO: KADIGNA CARLA SILVA COSTA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : KADIGNA CARLA SILVA COSTA
DATA : 15/06/2016
HORA: 14:00
LOCAL: Auditório do Departamento de Morfologia
TÍTULO:

MORFOFUNCTIONAL ANALYSIS OF THE TESTIS AND SPERMATOGENIC PROCESS OF BAT Artibeus planirostris (CHIROPTERA:PHYLLOSTOMIDAE)

PALAVRAS-CHAVES:

Bats, Reproductive biology, Spermatogenic process.

PÁGINAS: 20
GRANDE ÁREA: Ciências Biológicas
ÁREA: Morfologia
SUBÁREA: Histologia
RESUMO:

The bats act in different ways in regulating ecosystems. Given the scarcity of studies on their reproductive biology, particularly in males, this study aimed to quantify the spermatogenic process of the bat Artibeus planirostris, as well their seasonal variations, by morphometric and morphological analysis of the testes. The animals were collected in the year of 2014 between the dry (n=9) and rainy seasons (n=9), on the central campus of the Federal University of Rio Grande do Norte (Natal-RN, Brazil). After euthanasia, the testes were collected and histologically processed for embedding in historesin and analyzed under light microscopy. The results obtained on morphometry were compared using the Kruskal-Wallis test or the t test, considering a significance level of 5% (p<0.05). Considering the two seasons, the animals showed an averaged Gonadossomatic Index (GSI) of 0.47%, and the seminiferous tubules represented about 94% of testicular parenchyma, the remainder being represented by the intertubule. The seminiferous tubules were represented by about 28% of lumen, 60% of seminiferous epithelium and 5% tunica propria. Only the lumen changed significantly between the seasons evaluated, with the higher percentage found in the rainy season. The tubular diameter and the seminiferous epithelium height had averages of 140μm and 43μm, respectively. It was obtained a tubular length per gram of testis of 66m, and a Tubulessomatic Index (TSI) of 0.42%. The percentage of Leydig cells and lymphatic vessels in the intertubule was significantly higher in the dry season compared to the rainy season, while the connective tissue percentage in the intertubule was higher in the rainy season. The percentage of lymphatic vessels in the testes was significantly higher in the dry season, while the percentage of connective tissue in the testes was higher in the rainy season, as well its volume in testicular parenchyma (p<0.05). The Leydigosomatic index (ILS) was higher in the dry season. It can be concluded that Artibeus planirostris presented testicular pattern similar to other mammals, high GSI, TSI, LSI and tubular length per gram of testis. The results revealed important data about the gonadal dynamics of these animals in the evaluated seasons.

MEMBROS DA BANCA:
Presidente - 1718086 - DANIELLE BARBOSA MORAIS
Interno - 1076490 - FERNANDO VAGNER LOBO LADD
Interno - 1672446 - SIMONE ALMEIDA GAVILAN LEANDRO DA COSTA