Banca de QUALIFICAÇÃO: GABRIEL REZENDE SANTOS

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : GABRIEL REZENDE SANTOS
DATE: 11/12/2024
TIME: 09:00
LOCAL: Mini auditório do ISPA
TITLE:

MORPHOLOGY OF THE LANGUAGE OF Vanellus chilensis WITH A VIEW TO CORRELATION WITH FOOD DIET

KEY WORDS:

Southern Lapwing; anatomy; lingual papillae; nutrition. 

PAGES: 26
BIG AREA: Ciências Agrárias
AREA: Medicina Veterinária
SUBÁREA: Clínica e Cirurgia Animal
SPECIALTY: Clínica Veterinária
SUMMARY:

The Southern Lapwing (Vanellus chilensis), a medium-sized bird typical of South America, inhabits areas near bodies of water and open fields, and has recently adapted to urban environments and deforested areas in the Amazon. Its omnivorous diet includes invertebrates, small vertebrates and vegetation.  The structure of the bird's tongue generally reflects its crucial role in manipulating and ingesting food, being divided into an apex, a body with a papillary crest and a root. However, the morphology of the tongue of this species still has gaps to be filled, which we aimed to study. Macroscopically, the Southern Lapwing tongue showed a visible median groove at the apex and conical papillae on the papillary ridge, facing the tail, with greater thickness on the sides. In the root region, close to the glottis, conical papillae were also observed facing caudally, as well as a stratified epithelial lining, with the presence of keratin in some areas, reinforcing the protection and functionality of the tongue. The body and root of the tongue contained mucous salivary glands, important for lubrication, as well as three compact bones with an obvious medullary canal. Microscopically, the tongue epithelium showed variable keratinization. At the apex, there was a more stratified layer in the median sulcus, while the lateral layers showed significant keratin deposition. The presence of connective and hyaline tissue, as well as vascularization, indicate an adaptation to support the functions of the tongue. In the body, the tubulo-acinous salivary glands produce mucopolysaccharides, which are evident in the Alcian Blue staining test. The glottis, located caudal to the tongue, was lined with non-keratinized stratified sidewalk epithelium, with U-shaped bones and hyaline cartilage, as well as skeletal muscles distributed along its structure. The presence of conical papillae on both the tongue and glottis is an adaptation to facilitate feeding, and the variety of structures and keratinization in specific areas reinforces protection against wear and tear. Contrary to what has been described in previous literature, the presence of taste buds surrounded by desquamation epithelial cells at the base of the papillae was identified. Compared to other birds, the Southern Lapwing has specific anatomical and histological characteristics that reflect its diet and environmental adaptation. Conical papillae, mucous salivary glands and hyaline cartilage are common adaptations among birds with an omnivorous diet, promoting both efficient feeding and structural protection.

COMMITTEE MEMBERS:
Presidente - 1661748 - ERIKA RENATA BRANCO
Interna - 1733442 - ANA RITA DE LIMA
Interna - 2313941 - ELANE GUERREIRO GIESE
Externa ao Programa - 3494995 - ANDREA MAGALHAES BEZERRA - UFRAExterna à Instituição - ELLEN YASMIN EGUCHI MESQUITA - Unama