Banca de QUALIFICAÇÃO: LENILDA TEIXEIRA DA SILVA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : LENILDA TEIXEIRA DA SILVA
DATA : 09/06/2016
HORA: 14:00
LOCAL: Auditório do Departamento de Morfologia
TÍTULO:

Morphological adaptations of the digestory tract of neotropical fish Steindachnerina notonota (Characiformes, Curimatidae) to the detritivore feeding habit

PALAVRAS-CHAVES:

Morphology. Detritivory. Ilyophago fish. Digestory tract. Piabussú.

PÁGINAS: 82
GRANDE ÁREA: Ciências Biológicas
ÁREA: Morfologia
SUBÁREA: Histologia
RESUMO:

Detritivory is the common freshwater fish, especially in the Neotropics, and although small percentage of species are detritivores, these compose more than 50% of the total biomass ichthyofaunal, and ecological importance as a link in the food chain. The objective of this study consists of analyzing the morphological adaptations of the digestory tract of Steindachnerina notonota. Thus, 10 adult specimens were used, necropsied to macroscopic observations of the digestory tract. All structures were analyzed with the aid of a stereomicroscope. The organs were fixed in 10% formalin and submitted to hematoxylin and eosin staining, and PAS - periodic acid Schiff (gill rakers, epibranquiais organs, esophagus, stomach, midgut (pyloric caeca, proximal segment, middle segment and distal segment), and hindgut. The specimens analyzed had total length of 8,66 ± 3,38 cm, standard length of 6,74 ± 1,95 cm, and weight 11,72 ± 11,59 g. The mouth is terminal, presents particular complex bucopharyngeal, absent from tooth and tongue, and has three types of formats of gill rakers with mucous cells and taste buds. The epibranquial organs and other regions of the digestive tract have the layers of mucosa, submucosa, muscular and serous. How high degree of digestory adaptation, possess the epibranquiais organs in the form of expanded primitive saccule with its peculiarities, a mechanical stomach with highly developed musculature in the pylorus, and a very long and coiled intestine, which internally has exclusive helical fold. The morphological aspects of digestory tract of S. notonota are correlated to detritivore-ilyophago specialized feeding habit.

 

 

 

MEMBROS DA BANCA:
Interno - 1076490 - FERNANDO VAGNER LOBO LADD
Interno - 1544854 - NAIANNE KELLY CLEBIS
Presidente - 2477216 - NAISANDRA BEZERRA DA SILVA FARIAS