https://repositorio.ufra.edu.br/jspui/handle/123456789/23 Programa de Pós-Graduação em Saúde e Produção Animal na Amazônia - Belém 2026-10-16T05:37:35Z https://repositorio.ufra.edu.br/jspui/handle/riufra/2919 Título: Ocorrência de mixosporídeos em (Mylossoma duriventre) e possíveis implicações fisiológicas na região de Santarém-PA Autor(es): PACHECO, Acácio Heitor Barros Abstract: Mylossoma duriventre (pacu manteiga) is a species widely distributed in the Amazon Basin, of food and ornamental importance in the Northern region. This study aimed to characterize morphologically, histopathologically, and molecularly the myxosporidia that infect M. duriventre from the Santarém-PA region, evaluating their tissue distribution and possible physiopathological implications. One hundred and twenty specimens acquired at the Santarém-PA Fish Market between December 2024 and October 2025 were used, subjected to necropsy, histopathological, molecular, and phylogenetic analyses, as well as biometrics. The laboratory procedures were performed at the Laboratory of Morpho-molecular Integration and Technologies (LIMT) of the Federal Rural University of the Amazon (UFRA, Belém campus). Parasitized tissues were processed for histology, electron microscopy, and molecular biology. Based on spore morphology, representatives of the genera Sphaeromyxa, Myxobolus, Henneguya, and Ortholinea were identified, distributed in different organs, including the kidney, gills, and urinary bladder. Histological analyses revealed tissue alterations compatible with myxozoan infection, especially in the gills, suggesting potential local functional impairment. However, no parasitic structures or histopathological alterations were observed in the gonads of the analyzed individuals. Therefore, it is recommended that future studies include experimental designs and physiological biomarkers capable of directly and quantitatively evaluating possible interactions between parasitism and the reproductive performance of M. duriventre. 2026-07-06T00:00:00Z https://repositorio.ufra.edu.br/jspui/handle/riufra/2917 Título: Utilização de pericárdio bovino preservado em glicerina na capsuloplastia em cães jovens portadores de displasia coxofemural Autor(es): DAVID, Maridelzira Betânia Moraes Abstract: This paper speaks about the experimental utilization of the bovine pericardium, preserved in environment temperature in 98% glycerin, associated to the pleatment of articular capsule, in corrective surgery to coxofemural displasy and luxations of degree III and IV in young dog. The clinic avaliation was realized in equall periods, what permited to be evident the function recupered of affected member, confirmed for radiograph exams, when was observed the formation bony tissue in dorsal acetabular labrum, co- operating amplificating acetabulum and intra articular space normalization, this surgical technique is indicating, because the small cost and to be acessible of clinic and ambulatory of clinic and ambulatory of small animals. 2026-09-11T00:00:00Z https://repositorio.ufra.edu.br/jspui/handle/riufra/2916 Título: Morfologia cardíaca de Ardea alba. Autor(es): FEIO, Júlia Vaz Abstract: Ardea alba (Linnaeus, 1758), known as the great white heron, is the most common heron on the planet. It has a long neck, black legs and yellow beak, with a body covered in white feathers. It has a circulatory system similar to that of mammals, but a larger heart compared to the coelomic cavity. In several species, the heart has fibrous rings that serve to stabilize the ostia against contractile deformation, called the cardiac skeleton – composed of connective tissue with intercalated parts of cartilage or bone. This study aimed to describe the cardiac anatomy of the species, generating scientific knowledge about the particularities of this Amazonian avifauna. For this purpose, 10 specimens of great white heron were used, coming from the environmental police battalion and the mangal-das-garças park. Before extracting the heart, in situ and ex situ photodocumentation was carried out. The material was then processed for light microscopy, scanning electron microscopy, and immunohistochemistry, in addition to 3D scanning. The species presented a heart tilted slightly to the right and an aortic arch that emerged from the cardiac base and followed the right antimere, with other structures similar to those of mammals. Light microscopy allowed defining the cardiac layers, presence of Purkinje fibers, and intercalated discs. Cartilage at the base of the heart was identified at the valves, valves, and fibrous skeleton. Differential staining marked the cartilage as predominantly elastic. Scanning electron microscopy provided ample visualization of the cartilage pieces that support the aortic base. However, immunohistochemistry was negative for desmin staining. Finally, the colored and 3D organ provided better didactic identification of the structures present at the heart base. Thus, it was possible to determine that the great white heron has a different aorta orientation than that found in mammals, but, like other species, it also has cardiac cartilage in its heart, although the type identified is unusual in the literature. It has large cartilaginous pieces, compared to the size of the organ, and did not present desmin marking in the cardiac tissue, the latter possibly being related to the antibody that was used. 2025-12-02T00:00:00Z https://repositorio.ufra.edu.br/jspui/handle/riufra/2915 Título: Diversidade e ecologia parasitária de Propimelodus eigenmanni (Siluriformes: Pimelodidae), capturado na baía do Marajó, Pará Autor(es): ALVES, Gabrielly Pantoja Abstract: South America is home to one of the world’s richest fish faunas, with more than 6,000 described fish species, of which approximately 2,400 are found in the Amazon Basin, considered the region with the greatest biodiversity on the planet. Fishing, in addition to representing an important economic and food-related activity, also highlights the ecological relevance of fish, which serve as hosts for a wide range of parasitic fauna. Thus, this study aims to describe the diversity and parasitic ecology of Propimelodus eigenmanni captured on Jutuba Island, Marajó Bay, Pará, Brazil. A total of 100 specimens of P. eigenmanni (52 ♂ and 48 ♀) were analyzed, and the helminths found were quantified for analysis of ecological indices of parasitism and processed for observation under light microscopy and scanning electron microscopy. The prevalence of parasitism was 99%, with a total of 3,239 parasites found. The following helminths were identified: Dichelyne (D.) jutubensis, Spirocamallanus delirae (adults and larvae), Spirocamallanus rarus, larvae of Anisakis sp. and Hysterothylacium sp., and Cestoda (proglottids). The study presents an important taxonomic contribution to the biodiversity and parasitic ecology of Amazonian fish, including the description of Dichelyne (D.) jutubensis, which highlights the importance of parasitic taxonomy as fundamental too for understanding the parasite-host-environment relationship. 2026-08-26T00:00:00Z