Distribution of cranial and caudal mesenteric arteries in nutria (Myocastor coypus) / Distribuição das artérias mesentéricas cranial e caudal na nutria (Myocastor coypus)

ABSTRACT

Background: The nutria (Myocastor coypus) is a semi-aquatic rodent, originating from the extreme south of South America, exploited for commercial purposes, in particular the quality of your skin and flesh. The objective of this study was to systematize and describe the cranial and caudal mesenteric arteries in the nutria. Materials, Methods & Results: To perform this study were used a total of 30 specimens of nutria, 15 females and 15 males. To the animals were administered heparin and after thirty minutes Thiopental Sodium, via an intraperitoneal injection, to perform euthanasia. The thoracic cavity was opened ventrally in plastron, the thoracic aorta was cannulated and the system was washed with saline solution. Then the system was filled with latex 603 colored in red and the animals remained immersed in running water for one hour. The skin was removed and then the trunk was transversally sectioned near the last thoracic vertebrae. The abdominal cavity remained closed and formaldehyde was administered via an intraperitoneal injection. The specimens were fixed in formaldehyde for seven days, the abdominal cavity was opened, the viscera were removed in block and the arteries were dissected. Statistical analyses of the results were performed using percentage values. It was observed that the abdominal aorta gave rise to the cranial and caudal mesenteric arteries. The cranial

RESUMO

A nutria (Myocastor coypus) é um roedor semi-aquático de porte médio, originário do extremo sul da América do Sul, mas disseminado em várias partes do mundo, como Estados Unidos e Europa, onde tem sido explorado com fins comerciais, em especial pela qualidade de sua pele e de sua carne. Alimentam-se de capim, raízes e plantas aquáticas. [...]