Navegando por Assunto "Aequidens plagiozonatus"

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Acesso aberto (Open Access)
An anatomopathological study of hepatic coccidiosis (Calyptospora sp.) in the Acará-pixuna, Aequidens plagiozonatus Kullander, 1984 from the Brazilian state of Pará
(2013-02) VIDEIRA, Marcela Nunes; SILVA, Michele Velasco Oliveira da; TORTELLY, Rogério; MENEZES, Rodrigo Caldas; SÃO CLEMENTE, Sérgio Carmona de; MATOS, Edilson Rodrigues
The present study focuses on the anatomopathological alterations provoked by parasitism by Calyptospora sp. in 40 specimens of Aequidens plagiozonatus collected in Pará, Brazil. Examinations of the fresh material by compression of the hepatopancreas and histological sections showed immature forms and oocysts characteristic of the genus Calyptospora, in addition to a large quantity of melanomacrophagic centers spread throughout the organ. No significant inflammation of the hepatic tissue was observed. The melanomacrophagic centers and the compression of the hepatocytes are part of the response of the host to the parasite. This study represents the first record of parasitism by Calyptospora in A. plagiozonatus.
Acesso aberto (Open Access)
Estudo morfológico de microparasitas em Aequidens plagiozonatus Kullander 1984 (Osteiththyes: Cichlidae)
(Universidade Federal do Pará, 2010-12-22) VIDEIRA, Marcela Nunes; MATOS, Edilson Rodrigues; http://lattes.cnpq.br/7895814591867510
The ornamental fish market has been growing gradually in recent years and the increasing pressure on the banks of natural fishery resources, seeks to find alternatives to the continued production of fish through aquaculture or is the search for new features or even slightly, such as fish Aequidens plagiozonatus, common name cará pixuna. Based on this knowledge is important to perform studies characterizing the parasitological profile of these species of fish in order to verify and control the spread of parasites that cause imbalance in aquatic ecosystems. The objective this study was to provide a better understanding the bioecology, through a survey of actions caused by parasitic microparasites (microsporídios, myxosporídios e coccidios) emphasizing the morphology of these organisms. For this, five collections were made, totaling 100 specimens, which were autopsied and having their organs. Parasitized organs were removed fragments, fixed and processed for light microscopy. Hepatosomatic index were calculated and the prevalence of the parasite specimens for each group of parasites analyzed, giving the enfaze microparasites. From the observations made were 3 phyla were found: Myxozoa, Microsporidia and Apicomplexa. We observed the first occurrence of mixosporidiose urinary bladder of this species. We also observed the occurrence of multiparasitism and the multifocal localization of some parasites. The prevalence of microsporidia in the studied was 100%, 18% myxosporeans, Apicomplexa 45%. These data represent an important contribution to the study sanitary fish A. plagiozonatus in the region, since any activity that involves the extraction of natural resources should be managed through planning and management measures to allow the equilibrium of ecosystems, promoting sustainable use of its resources and guaranteeing the preservation of the system, so that it can prevent the spread and transfer of disease by means of aquatic animals. Keywords: Fish, Ictioparasitology, Aequidens plagiozonatus, microparasites.