Parasitic infections in two Benthopelagic fish from Amazon: the Arowana Osteoglossum bicirrhosum (Osteoglossidae) and Oscar Astronotus ocellatus (Cichlidae).

The parasitic fauna of wild Osteoglossum bicirrhosum from central Amazon (Brazil) and wild Astronotus ocellatus from eastern Amazon (Brazil) as well as the host-parasite relationship were evaluated. 87.5% O. bicirrhosum were parasitized only by Gonocleithrum aruanae (Monogenoidea). 92.8% A. ocellatus were parasitized by Ichthyophthirius multifiliis (Ciliophora), Gussevia asota (Monogenoidea), Posthodiplostomum sp. metacercariae (Diplostomidae), Procamallanus inopinatus adults and Contracaecum larvae (Anisakidae). High levels of infection by G. aruanae occurred in O. bicirrhosum while in A. ocellatus the highest levels of infection were caused by helminthes ectoparasites such as G. asota, and endoparasites such as Posthodiplostomum sp., P. inopinatus and Contracaecum sp. There was a significant (p>0.05) negative correlation between the intensity of helminthes species and the relative condition factor (Kn) from A. ocellatus, indicating that these parasites are pathogenic for hosts. The parasite fauna of O. bicirrhosum was scarce, while the parasites for A. ocellatus were mainly helminthes species, including adults and larval forms. Such differences on parasites fauna of both omnivore hosts may due to their history life as well as environmental and biological factors

Parasite diversity in Oxydoras niger (Osteichthyes: Doradidae) from the basin of Solimões River, Amazonas state, Brazil, and the relationship between monogenoidean and condition factor.

This study describes the parasitic fauna of Oxydoras niger from the Coari Lake, tributary of the medium Solimões River, State of Amazonas, Brazil, and the relationship between the number of Monogenoidea and the condition factor. From a total of 27 examined fish, 70.3% were parasitised by at least one parasite species as follows: Ichthyophthirius multifiliis (Protozoa), Chilodonella sp. (Protozoa), Cosmetocleithrum gussevi, C. confusus, C. parvum and Cosmetocleithrum sp. (Monogenoidea), Paracavisona impudica (Acanthocephala), Cucullanus grandistomis (Nematoda), Proteocephalus kuyukuyu (Cestoda) and Dadaytrema sp. (Digenea). Monogenoidea helminthes were the most prevalent parasite when compared to protozoan and intestinal helminthes. This study showed that O. niger has a great parasite diversity composed mainly of monogenoideans followed by acanthocephalan and digenean. This is the first record of Dadaytrema in O. niger from the Brazilian Amazon. There was a positive correlation between the number of monogenoideans and the condition factor (Kn) of fish, and with this mean intensity of infection, fish welfare was not affected

Metazoan and protozoan parasites of freshwater ornamental fish from Brazil.

Annually, 27 million of freshwater ornamental fish have been exported from Brazil for international trade, mainly to the United States and Europe. Most of these fish are originated from Amazonian basin, especially from the states of Amazonas (25.0 million/year) and Pará (1.0 million/year). Small quantity of these fish is from culture. Paracheirodon axelrodi (18 million/year) is the main fish exported, followed by Otocinclus affinis (1.4 million/year), Hemigrammus bleheri (1.1 million/year) and Paracheirodon simulans (0.88 million/year). Ornamental fish exported from Brazil have parasites that are also reported in hosts from the other countries. Parasitic infections represent an important challenge for commercial suppliers of ornamental fish. On this view, low number of parasites may evolve to undesirable and dangerous number compromising the fish health.bitstream/item/211026/1/CPAF-AP-2009-Metazoan-and-protozoan-parasites.pd

Métodos para coleta de parasitos de peixes

Insensibilização dos peixes; Dados biométricos; Sequência de procedimentos para coleta de parasitos de peixe; Detecção e métodos de fixação de parasitos de peixes; Preparação dos reagentes fixadores de parasitos;bitstream/item/46620/1/AP-2011-Metodos-coleta-Circular.pd

Projeto Tec Rede: tecnologias para produção de tambaqui em tanque-rede.

Plano Gerencial. Desempenho produtivo de tambaqui em sistemas de tanque-rede. Sanidade de tambaqui em sistema de tanque-rede e impactos ambientais. Aproveitamento agroindustrial do tambaqui. Ações integradas de comunicação e Transferência de Tecnologia.bitstream/item/142265/1/CPAF-AP-2016-Folder-TEC-REDE-v2.pdf1 Folder

Respostas hematológicas de Arapaima gigas (Pisces: Arapaimidae) parasitados naturalmente por protozoários e metazoários.

O presente estudo comparou os parâmetros sanguíneos de Arapaima gigas Schinz, 1822 de cultivo, parasitados por uma espécie de protozoário e três espécies de helmintos. Em uma das pisciculturas os peixes foram parasitados somente por Ichthyophthirius multifiliis (Ciliophora), enquanto na outra foram parasitados por I. multifiliis, Dawestrema cycloancistrium e Dawestrema cycloancistrioides (Monogenoidea) e Polyacanthorhynchus macrorhynchus (Acanthocephala). Determinou-se a contagem total de eritrócitos , trombócitos e leucócitos (total e diferencial), hematócrito, concentração de hemoglobina, volume corpuscular média (VCM), hemoglobina corpuscular média (HCM), concentração da hemoglobina corpuscular média (CHCM), glicose e proteínas totais. Os peixes parasitados por I. multifiliis, D. cycloancistrium, D. cycloancistrioides e P. macrorhynchus mostraram menores valores de hematócrito, VCM e níveis de glicose, e maior concentração de hemoglobina, HCM, CHCM, número de eritrócitos , monócitos , neutrófilos e eosinófilos totais quando comparados aos peixes parasitados somente por I. multifiliis. Portanto, esses resultados indicam uma resposta desses parâmetr os sanguíneos ao parasitismo em A. gigas