Desenvolvimento embrionário e fetal de catetos (pecari tajacu linnaeus, 1758)

Detalhes bibliográficos
Ano de defesa: 2021
Autor(a) principal: Araújo Júnior, Hélio Noberto de
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Federal Rural do Semi-Árido
Brasil
Centro de Ciências Agrárias - CCA
UFERSA
Programa de Pós-Graduação em Ciência Animal
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Link de acesso: https://repositorio.ufersa.edu.br/handle/prefix/6757
Resumo: Given the importance of the information on intrauterine development in tayassuids, the objective of this study was to describe the external morphology of embryos and fetuses of collared peccaries raised in captivity. Two concepts were used for each gestational age and newborns. On the first third of gestation, there is a marked body curvature, brain vesicles, somites, internal organs, crystalline placoid, auricular protrusion, limb buds. At the 25th day post-copulation (dpc), the embryos had a crown-rump length (CCR) of (10.20 ± 0.85 mm), weighing (0.16 ± 0.02 g); at 30 dpc CCR (13.78 ± 0.08 mm), weighing (0.36 ± 0.02 g); and at 40 dpc CCR (22.12 ± 0.04 mm), weighing (1.37 ± 0.02 g). On the second gestational third, fetuses had lost their body curvature, with greater anatomical definition, such as: skeletal formation, external ear, nostrils, eyelids, tactile hair, closure of cranial sutures. In addition, at 50 dpc, the dorsal scent gland and genital tubercle differentiation were visualized, with CCR (59.66 ± 0.66 mm), weighing (12.36 ± 0.79 g); at 60 dpc, CCR (80.12 ± 4.12 mm), weighing (32.74 ± 2.27 g); at 70 dpc, CCR (110.40 ± 1.23 mm), weighing (83.79 ± 3.20 g); at 80 dpc, CCR (137.01 ± 2.06 mm), weighing (187.69 ± 17.20 g); and at 90 dpc, CCR (150.80 ± 4.24 mm), weighing (211.02 ± 10.11 g). In the final third of gestation, the organs were completely formed, with skin darkening, opening of the eyelids, dental eruption, development of the dorsal odorous gland, external sexual organs, and gender attachments. At 100 dpc it presents CCR (156.75 ± 2.33 mm), weighing (257.63 ± 1.65 g); and at 120 dpc CCR (209.65 ± 18.03 mm), weighing (399.40 ± 48.79 g). The neonates, on the other hand, had CCR (266.10 ± 6.22 mm), weighing (913.05 ± 10.82 g). The data made it possible to determine the neonatal growth, allowing a more reliable estimation, considering the utilization of a real gestational age. This study also provides information that may contribute to the adequate reproductive management, and it furthermore aggregates in the use of reproductive biotechnologies of the species