Laboratorio Of Aquicultura E Pesca

Macapá, Brazil

Laboratorio Of Aquicultura E Pesca

Macapá, Brazil
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Wanderson Pantoja M.F.,Laboratorio Of Aquicultura E Pesca | Ligia Neves R.,Laboratorio Of Aquicultura E Pesca | Marcia Dias R.D.,Laboratorio Of Aquicultura E Pesca | Marcia Dias R.D.,Federal University of Amapá | And 4 more authors.
Revista MVZ Cordoba | Year: 2012

Objective: This study describes the parasitic fauna and relative condition factor (Kn) in Nile tilapia Oreochromis niloticus L. (Cichlidae) from fish farms in the State of Amapá. Material and methods: 123 fish from four fish farms in the state of Amapá, Brazil were necropsied for parasitological and Kn analysis. Results: 64.2% of the examined fish, had the gills infected with Cichlidogyrus tilapiae Paperna, 1960 (Monogenoidea: Dactylogyridae); Ichthyophthirius multifiliis Fouquet, 1876 (Protozoa: Ciliophora), Trichodina Ehrenberg, 1830 and Paratrichodina africana Kazubski & El-Tantawy, 1986 (Protozoa: Trichodinidae). The highest prevalence found corresponded to Monogenoidea C. tilapiae while the lowest corresponded to Trichodinidae. However, I. multifiliis was the parasite that presented the greatest intensity and abundance. The differences found in the infection rates of the different fish farms due to causes further discussed. The parasitism did not influence the relative condition factor (Kn) of fish. This was the first record of P. africana in Brazil and occurred in the Eastern Amazon. Conclusions: In Brazil, Lamproglena sp. is an emerging parasite in the Southern and Southeastern regions, but this crustacean was not found in the Nile tilapia in the State of Amapá. The parasitic infections in Nile tilapia farmed in Brazil are caused by protozoan, monogenoidea, crustacea and digenea species, and the regional differences on their prevalence and intensity rates are discussed in this study.


Costa I.C.,Federal University of Amapá | Rodrigues R.F.,Federal University of Amapá | Almeida F.B.,Federal University of Amapá | Favacho H.A.,Federal University of Amapá | And 6 more authors.
Latin American Journal of Pharmacy | Year: 2014

Nanoemulsions are heterogeneous translucent systems, with intrinsic characteristics that make then in the spotlight of new product candidates for pharmacy, cosmetic and food industries. Surfactants have a main role in nanoemulsion stabilization, which is often associated to similarity among hydrophile- lipophile (HLB) values of oil phase and surfactants mixture. Jojoba oil is a natural raw material for pharmacy industry with economic significance and great potential for nanobiotechnology. The present study describes the development of jojoba oil based nanoemulsions. Measurement of mean droplet size confirmed nanoemulsion formation, in addition to a characteristic bluish reflection expected for this formulation type. Best formulations achieved were nanoemulsions with HLB value of 10 (235.0 nm) and 11 (240.0 nm). This data suggest that HLB value of jojoba oil may be in the zone of 10-11. To our knowledge, these are the first efforts for HLB characterization and nanoemulsion development of formulations with jojoba oil.


The present study provides the first investigation on the ecological aspects of the parasites M. lippincottianus from the Amazonian basin, as well as the parasite-host relationship. 76 out of the examined fish (98.7%) were parasitized by at least one species of parasites. A total of 8,774 parasites were collected, being Ichthyophthirius multifiliis, Anacanthorus jegui, Dadayius pacupeva, Digenea gen. sp. (metacercariae), Procamallanus (Spirocamallanus) inopinatus, Procamallanus (Spirocamallanus) sp., Spinoxyuris oxydoras, Contracaecum sp. larvae, Dolops longicauda and Hirudinea gen. sp. Ichthyophthirius multifiliis was the dominant species, followed by A. jegui. Among the endoparasites, S. oxydoras and D. pacupeva were predominant. The mean diversity of parasites was HB = 0.96 ± 0.32 and there was aggregate distribution pattern. A positive correlation of body weight with the abundance of I. multifiliis and S. Oxydoras was observed, whereas a negative correlation of body weight with abundance of the Contracaecum sp. larvae was found. The relative condition factor (Kn) was not negatively affected by parasites, and a positive correlation between Kn and abundance of I. multifiliis, S. oxydoras and D. pacupeva was found. This study is the first one to record I. multifiliis, D. longicauda and A. jegui parasitizing M. lippincottianus, as well as the first record of D. pacupeva and S. oxydoras in the Amazonas river system.


Bittencourt L.S.,Federal University of Amapá | Pinheiro D.A.,Laboratorio Of Aquicultura E Pesca | Cardenas M.Q.C.,Instituto Oswaldo Cruz | Fernandes B.M.,Instituto Oswaldo Cruz | And 2 more authors.
Revista Brasileira de Parasitologia Veterinaria | Year: 2014

This study provides the first investigation on acquisition of parasites in invasive O. niloticus by parasite species of native Cichlidae from the Igarapé Fortaleza basin, Northern Brazil. There were examined 576 specimens of 16 species of native cichlids and invasive O. niloticus collected in the main channel and the floodplain area of this tributary of Amazon River. The invasive O. niloticus was poorly parasitized having only Ichthyophthirius multifiliis, Trichodina centrostrigeata, Paratrichodina africana, Trichodina nobilis (Protozoa) and Cichlidogyrus tilapiae (Monogenoidea), and this host has not acquired any parasite species common to the native ichthyofauna region. In contrast, species of native cichlids showed rich fauna of parasites with predominance of Monogenoidea species, larvae and adults of Nematoda, Digenea, Cestoidea and Acanthocephala, besides four species of Protozoa and four Crustacea. However, only T. nobilis was acquired by native fish, the Aequidens tetramerus, which is a new host for this exotic Trichodinidae. In O. niloticus, well established in the region, the small number of helminth species may be associated with its rusticity, good adaptation in the new environment and also the presence of native parasites with relative specificity, but without ability to complete its life cycle in this invasive host of this ecosystem.


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.


Neves L.R.,Laboratorio Of Aquicultura E Pesca | Pereira F.B.,Federal Rural University of Rio de Janeiro | Tavares-Dias M.,Laboratorio Of Aquicultura E Pesca | Luque J.L.,Federal Rural University of Rio de Janeiro
Journal of Parasitology | Year: 2013

Parasite infracommunities were studied in 202 specimens of Astronotus ocellatus collected from a freshwater lake in the State of Amapá, northern Brazil. Relationships between some host attributes (i.e., ontogeny, sex, and body size) and parasite infections were analyzed, but the primary focus was the seasonal variation in the parasite fauna. In total, 6,308,912 parasites belonging to 11 different taxa were found. Protozoa were the most abundant and dominant taxa, but monogeneans, trematode metacercariae, and nematode larvae were also prevalent and abundant. Fish ontogeny had a weak influence on parasite infection rates; juveniles were more parasitized by Dolops nana and Posthodiplostomum sp. The abundances of all parasite species were weakly correlated with host body size (low r2 values), except D. nana, Contracaecum sp., and Posthodiplostomum sp., which exhibited no correlation between abundance and host body size. Prevalence and abundance were different between flood and drainage seasons for all parasite species, except for D. nana and the 2 metacercarial species. Astronotus ocellatus may represent a link in food-web transmissions for parasites because it is used both as definitive and intermediate host. The parasite fauna of A. ocellatus was composed primarily of ectoparasites, and this could be considered typical of fishes that inhabit lentic waters. Seasonality was a strong determinant in the parasite community structure. © American Society of Parasitologists 2013.


Martins M.L.,Federal University of Santa Catarina | Marchiori N.,Empresa de Pesquisa Agropecuaria e Extensao Rural de Santa Catarina EPAGRI | Bittencourt L.S.,Laboratorio Of Aquicultura E Pesca | Tavares-Dias M.,Laboratorio Of Aquicultura E Pesca
Brazilian Journal of Biology | Year: 2016

A new species of Tripartiella is described from the gills of the wild saddle cichlid Aequidens tetramerus in north Brazil. Wet smears of skin and gills of examined fish were air-dried at room temperature and impregnated with Klein’s dry silver method for examination of the adhesive disc’s structures and denticles. Total prevalence of parasitism was 65%. This ciliate is characterized as a small-sized trichodinid, body diameter 37.03 ± 4.9 μm, adhesive disc 30.50 ± 2.71 μm, denticulate ring 13.28 ± 0.8 μm and 24 ± 2.0 denticles. Taxonomic and morphometric data for the new species are discussed. © 2016, Instituto Internacional de Ecologia. All rights reserved.


Santos E.F.,Laboratorio Of Aquicultura E Pesca | Tavares-Dias M.,Laboratorio Of Aquicultura E Pesca | Pinheiro D.A.,Laboratorio Of Aquicultura E Pesca | Neves L.R.,Laboratorio Of Aquicultura E Pesca | And 2 more authors.
Acta Amazonica | Year: 2013

The purpose of this paper was to evaluate the parasitic fauna and the host-parasite relationship in Colossoma macropomum farmed in cages of Matapi River, municipally of Santana, State of Amapá, in eastern Amazon, Brazil. Of 60 specimens of tambaqui examined, 96. 7% were parasitized by protozoans Ichthyophthirius multifiliis (Ciliophora) and Piscinoodinium pillulare (Dinoflagellida), monogenoideans Mymarotheciun boegeri and Anacanthorus spathulatus (Dactylogyridae), and leeches Glossiphoniidae gen. sp. (Hirudinea). The higher infestation levels were caused by protozoans I. multifiliis and P. pillulare, while the lower infestation levels were caused by leeches. No effects of parasitic infestation rates on fish health were observed. The relative condition factor (Kn) was not correlated with the intensity of parasites found. This was the first record of I. multifiliis and P. pillulare in C. macropomum farmed in cages in the Brazilian Amazon.


The Oxydoras niger Valenciennes, 1821 (Doradidae) is an endemic fish from the South America rivers basins (Amazonas, São Francisco, Essequipo and Orinoco Rivers) that is used as food by some Amazon people. The aim of this work was to study the effects of parasitism by protozoans and metazoans in the hemogram and the leukocytes features of O. niger collected in the Solimões River basin, Amazonas State, Brazil. Fish (70.3%) were parasitized by Ichthyophthirius multifiliis (Protozoa), Chilodonella sp. (Protozoa), Cosmetocleithrum spp. (Monogenoidea), Paracavisona impudica (Acanthocephala), Cucullanus grandistomis (Nematoda), Digenea and Cestoda, but the highest abundance was of monogenoideans species. This association of parasites caused a significant (p<0.05) increase in hemoglobin concentration and mean corpuscular hemoglobin concentration (MCHC). In blood smears of parasitized and non-parasitized fish were found lymphocytes, monocytes, neutrophils, PAS-positive granular leukocytes (PAS-GL) and eosinophils, but only neutrophils had its increase influenced by parasitism, while lymphocytes had a significant (p<0.05) decrease. This was the first study on blood parameters of O. niger in Amazon and the results may be used for comparison in others studies about this fish species.


PubMed | Empresa de Pesquisa Agropecuaria e Extensao Rural de Santa Catarina, Laboratorio Of Aquicultura E Pesca and Federal University of Santa Catarina
Type: Journal Article | Journal: Brazilian journal of biology = Revista brasleira de biologia | Year: 2016

A new species of Tripartiella is described from the gills of the wild saddle cichlid Aequidens tetramerus in north Brazil. Wet smears of skin and gills of examined fish were air-dried at room temperature and impregnated with Kleins dry silver method for examination of the adhesive discs structures and denticles. Total prevalence of parasitism was 65%. This ciliate is characterized as a small-sized trichodinid, body diameter 37.03 4.9 m, adhesive disc 30.50 2.71 m, denticulate ring 13.28 0.8 m and 24 2.0 denticles. Taxonomic and morphometric data for the new species are discussed.

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