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Jose Celso De Oliveira Malta - One of the best experts on this subject based on the ideXlab platform.
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biodiversidad de monogenoideos de la pirana roja Pygocentrus nattereri kner 1958 characiformes serrasalmidae en la amazonia central ocurrencia y taxonomia
Neotropical helminthology, 2020Co-Authors: Aprigio Mota Morais, Jose Celso De Oliveira MaltaAbstract:Fue descrita la fauna de parasitos de la clase Monogenoidea en Pygocentrus nattereri capturados en seis lagos inundables del rio Amazonas en la Amazonia Central: Baixio Negro Iauara, Anana, Campina y Maraca, localizados entre las ciudades de Manaus y Coari, Brasil. Fueron adicionadas informaciones a las descripciones originales de las especies ya descritas y fueron citadas nuevas ocurrencias. Fueron capturados 355 P. nattereri durante los meses de marzo, junio, septiembre y diciembre de 2008. Los peces median 15,4 cm ± 3,5 y pesaban 230,9 g ± 2,7. Fueron colectados y determinados, hasta el menor taxon posible 50,987 especimenes de Monogenoidea, divididos en siete generos y 16 especies. Fue encontrada una nueva especie de Anacanthorus sp., sin embargo el numero de individuos fue muy bajo para hacer la descripcion correspondiente. Fue realizado el primer registro de una especie de la familia Gyrodactylidae parasitando P. nattereri. La gran diversidad de especies de Monogenoidea que utilizan a P. nattereri como huesped indica la importancia del rol que esta especie de pez posee para mantener la biodiversidad en los lagos inundables de la Amazonia Central.
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nematofauna of red piranha Pygocentrus nattereri kner 1958 characiformes serrasalmidae from amazonia brazil
Revista Brasileira De Parasitologia Veterinaria, 2019Co-Authors: Aprigio Mota Morais, Melissa Querido Cárdenas, Jose Celso De Oliveira MaltaAbstract:: Between March and October 2008, 355 specimens of Pygocentrus nattereri were collected from the lowland lakes of Central Amazonia, Brazil, to study their nematode fauna. A total of 1.116 specimens of Nematoda were collected, belonging to six species. Procamallanus (Spirocamallanus) inopinatus was the species with the highest parasite indices. Larvae of Anisakis sp. have zoonotic potential and were found parasitizing the intestine and liver of Pygocentrus nattereri. Some of these nematode species were new records for the host P. nattereri. The diversity of nematodes that use P. nattereri as a host indicates the important role of this fish species in the maintenance of these six nematode species in the lowland lakes of Central Amazonia.
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Parasitism by argulids (Crustacea: Branchiura) in piranhas (Osteichthyes: Serrasalmidae) captured in the Caiçara bays, upper Paraguay River, Pantanal, Mato Grosso state, Brazil
Neotropical Ichthyology, 2012Co-Authors: Márcio Fontana, Jose Celso De Oliveira Malta, Ricardo Massato Takemoto, Lúcia Aparecida De Fátima MateusAbstract:In this study, 446 fishes were analyzed: 190 Pygocentrus nattereri, 193 Serrasalmus maculatus, and 63 S. marginatus.They were captured in two bays, upper and lower Caicara, in the upper Paraguay River basin, during one hydrological cycle from May 2008 to April 2009. Six species of Branchiura were found: Dolops bidentata, D. longicauda, Dolops sp., Argulus multicolor, A. chicomendesi, and Dipteropeltis hirundo. All fish species were infested by more than one species of Branchiura and the overall prevalence was 33.4%. The following prevalences were observed: 52.6% in P. nattereri; 20.3% in S. maculatus, and 15.8% in S. marginatus. The relative condition factor (Kn) differed significantly between parasitized and non parasitized individuals only in P. nattereri and S. maculatus. There was no correlation between Kn and abundance of parasites nor between body length (Ls) and intensity of infestation, in all three host species.
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Parasitism by argulids (Crustacea: Branchiura) in piranhas (Osteichthyes: Serrasalmidae) captured in the Caiçara bays, upper Paraguay River, Pantanal, Mato Grosso state, Brazil
Sociedade Brasileira de Ictiologia, 2012Co-Authors: Márcio Fontana, Jose Celso De Oliveira Malta, Ricardo Massato Takemoto, Lúcia Aparecida De Fátima MateusAbstract:In this study, 446 fishes were analyzed: 190 Pygocentrus nattereri, 193 Serrasalmus maculatus, and 63 S. marginatus.They were captured in two bays, upper and lower Caiçara, in the upper Paraguay River basin, during one hydrological cycle from May 2008 to April 2009. Six species of Branchiura were found: Dolops bidentata, D. longicauda, Dolops sp., Argulus multicolor, A. chicomendesi, and Dipteropeltis hirundo. All fish species were infested by more than one species of Branchiura and the overall prevalence was 33.4%. The following prevalences were observed: 52.6% in P. nattereri; 20.3% in S. maculatus, and 15.8% in S. marginatus. The relative condition factor (Kn) differed significantly between parasitized and non parasitized individuals only in P. nattereri and S. maculatus. There was no correlation between Kn and abundance of parasites nor between body length (Ls) and intensity of infestation, in all three host species.Foram analisados 446 peixes: 190 Pygocentrus nattereri, 193 Serrasalmus maculatus e 63 S. marginatus, capturados nas baías Caiçara superior e inferior na bacia do alto rio Paraguai, durante um ciclo hidrológico nos meses de maio de 2008 a abril de 2009. Foram encontradas seis espécies de Branchiura: Dolops bidentata, D. longicauda, Dolops sp., Argulus multicolor, A. chicomendesi e Dipteropeltis hirundo. Todos os peixes estavam parasitados por mais de uma espécie de Branchiura e a prevalência geral foi 33,4%. As prevalências foram: P. nattereri 52,6%, S. maculatus 20,3% e S. marginatus 15,8%. O fator de condição relativo (Kn) diferiu significativamente entre indivíduos parasitados e não parasitados apenas em P. nattereri e S. maculatus. Não houve correlação significativa entre Kn e abundância de parasitos, nem entre comprimento padrão (Ls) e intensidade de infestação, nas três espécies de piranhas analisadas
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Parasitism by argulids (Crustacea: Branchiura) in piranhas (Osteichthyes: Serrasalmidae) captured in the Caiçara bays, upper Paraguay River, Pantanal, Mato Grosso state, Brazil
2012Co-Authors: Márcio Fontana, Jose Celso De Oliveira Malta, Ricardo Massato Takemoto, Lúcia Aparecida De Fátima MateusAbstract:Foram analisados 446 peixes: 190 Pygocentrus nattereri, 193 Serrasalmus maculatus e 63 S. marginatus, capturados nas baías Caiçara superior e inferior na bacia do alto rio Paraguai, durante um ciclo hidrológico nos meses de maio de 2008 a abril de 2009. Foram encontradas seis espécies de Branchiura: Dolops bidentata, D. longicauda, Dolops sp., Argulus multicolor, A. chicomendesi e Dipteropeltis hirundo. Todos os peixes estavam parasitados por mais de uma espécie de Branchiura e a prevalência geral foi 33,4%. As prevalências foram: P. nattereri 52,6%, S. maculatus 20,3% e S. marginatus 15,8%. O fator de condição relativo (Kn) diferiu significativamente entre indivíduos parasitados e não parasitados apenas em P. nattereri e S. maculatus. Não houve correlação significativa entre Kn e abundância de parasitos, nem entre comprimento padrão (Ls) e intensidade de infestação, nas três espécies de piranhas analisadas
Wesley C Warren - One of the best experts on this subject based on the ideXlab platform.
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the piranha genome provides molecular insight associated to its unique feeding behavior
Genome Biology and Evolution, 2019Co-Authors: Manfred Schartl, Helene Volkoff, Mateus C Adolfi, Cornelia Schmidt, Petra Fischer, Patrick Minx, Chad Tomlinson, Susanne Kneitz, Axel Meyer, Wesley C WarrenAbstract:: The piranha enjoys notoriety due to its infamous predatory behavior but much is still not understood about its evolutionary origins and the underlying molecular mechanisms for its unusual feeding biology. We sequenced and assembled the red-bellied piranha (Pygocentrus nattereri) genome to aid future phenotypic and genetic investigations. The assembled draft genome is similar to other related fishes in repeat composition and gene count. Our evaluation of genes under positive selection suggests candidates for adaptations of piranhas' feeding behavior in neural functions, behavior, and regulation of energy metabolism. In the fasted brain, we find genes differentially expressed that are involved in lipid metabolism and appetite regulation as well as genes that may control the aggression/boldness behavior of hungry piranhas. Our first analysis of the piranha genome offers new insight and resources for the study of piranha biology and for feeding motivation and starvation in other organisms.
Áurea Regina Alves Ignácio - One of the best experts on this subject based on the ideXlab platform.
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Semiquantitative determination of total mercury in Pygocentrus nattereri Kner, 1858 and sediment at the plateau of Upper Paraguai River, Brazil
Chemosphere, 2017Co-Authors: Clautenes Maria De Almeida Ferreira, Silvia Gonçalves Egler, Allegra Viviane Yallouz, Áurea Regina Alves IgnácioAbstract:Abstract In this study an environmental assessment of contamination by total mercury (THg) was carried out at the Plateau of the Upper Paraguai River. Total mercury was evaluated in sediment and muscle of the red piranha Pygocentrus nattereri Kner, 1858, a piscivorous species at the top of the food chain consumed for subsistence and commercially. THg concentrations were below national guidelines established by WHO for sediments (100 ng g −1 ) and fish (100–600 ng g −1 ) for most of the sampled sites. Two sites located downstream of artisanal diamond and gold mines had THg concentrations in fish equal or greater than 600 ng g −1 .
Michelle D. Santos - One of the best experts on this subject based on the ideXlab platform.
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First report of larval Spiroxys sp. (Nematoda, Gnathostomatidae) in three species of carnivorous fish from Três Marias Reservoir, São Francisco River, Brazil
2009Co-Authors: Michelle D. Santos, Marcia Cavalcanti De Albuquerque, Cassandra M. Monteiro, Amanda N. Martins, Nicole Brand Ederli, Marilia De Carvalho Brasil-satoAbstract:The objective of this paper was to evaluate the parasitism by nematode larvae at three species of carnivorous fish in the Tres Marias Reservoir, Brazil. It was verified 108 individuals of Pygocentrus piraya (Cuvier, 1819), 168 Serrasalmus brandtii Lutken, 1875, and 112 Cichla kelberi Kullander & Ferreira, 2006. A total of 59 individuals of nematode larvae were found in the three hosts and identified as third stage (L3 or infective larvae of definitive host) Spiroxys sp.. The parasitic indexes were more elevated in the P. piraya and S. brandtii, although the prevalence and abundance of Spiroxys sp. were higher in smaller specimens of S. brandtii. This may be explained since these juveniles feed some arthropods, that serve as intermediate hosts and fish parasitized by larvae of Spiroxys sp. while foraging. Just two individuals of C. kelberi were parasitized by Spiroxys sp. and this rare occurrence was shown to be accidental. This record adds to the current knowledge of this nematode's life cycle and provides evidence that these carnivorous fish serve as paratenic hosts of Spiroxys sp. larvae in that Reservoir.
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Gamidactylus piranhus sp. nov. (Copepoda, Vaigamidae) from the nasal fossae of serrasalmid fishes from the Três Marias Reservoir, Upper São Francisco River, Minas Gerais State, Brazil
Acta Parasitologica, 2008Co-Authors: Vernon E. Thatcher, Michelle D. Santos, Marilia C. Brasil-satoAbstract:Gamidactylus piranhus sp. nov. (Copepoda, Vaigamidae) from the nasal fossae of “San Francisco piranha”, Pygocentrus piraya (Cuvier, 1819) and.White piranha. Serrasalmus brandtii (Lütken, 1875) is described. The new species is similar to the type species of the genus, Gamidactylus jaraquensis Thatcher et Boeger, 1984, but differs from it in the following respects: the cephalothorax is shorter, the free thoracic segments are usually longer, leg 5 is reduced to a simple seta and a spine on the second antennal segment is lacking. Gamidactylus bryconis Varella, 1995 and Gamidactylus hoplius Varella et Malta, 1996, do not closely resemble the new species because they are much larger and both present leg 5 reduced to a double seta.
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Brasergasilus bifurcatus sp. nov. (Copepoda, Ergasilidae, Abergasilinae) from the gills and nasal fossae of serrasalmid fishes from the Três Marias Reservoir, Upper São Francisco River, Minas Gerais State, Brazil
Acta Parasitologica, 2007Co-Authors: Michelle D. Santos, Vernon E. Thatcher, Marilia C. Brasil-satoAbstract:Brasergasilus bifurcatus sp. nov. (Copepoda, Ergasilidae, Abergasilinae) is described. Specimens of the new species were collected from the gills and nasal fossae of the serrasalmid fishes, known as “piranhas”, Pygocentrus piraya (Cuvier, 1819) and “pirambebas”, Serrasalmus brandtii (Lütken, 1875). The fishes were netted in the Três Marias Reservoir (18°12′59″S, 45°17′34″W) of the upper São Francisco River, Minas Gerais State, Brazil. The new species differs from its congeners by the following characters: the specific setation on the antennule; the terminal barb of the antenna; the deeply bifurcate distal segment of the mandible; the chalice-shaped genital complex; a conspicuous external indentation of the second segment of the first endopod and a very short terminal segment of the first exopod.
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Brasergasilus bifurcatus sp. nov. (Copepoda, Ergasilidae, Abergasilinae) from the gills and nasal fossae of serrasalmid fishes from the Três Marias Reservoir, Upper São Francisco River, Minas Gerais State, Brazil
Acta Parasitologica, 2007Co-Authors: Michelle D. Santos, Vernon E. Thatcher, Marilia De Carvalho Brasil-satoAbstract:Brasergasilus bifurcatus sp. nov. (Copepoda, Ergasilidae, Abergasilinae) is described. Specimens of the new species were collected from the gills and nasal fossae of the serrasalmid fishes, known as “piranhas”, Pygocentrus piraya (Cuvier, 1819) and “pirambebas”, Serrasalmus brandtii (Lutken, 1875). The fishes were netted in the Tres Marias Reservoir (18°12′59″S, 45°17′34″W) of the upper Sao Francisco River, Minas Gerais State, Brazil. The new species differs from its congeners by the following characters: the specific setation on the antennule; the terminal barb of the antenna; the deeply bifurcate distal segment of the mandible; the chalice-shaped genital complex; a conspicuous external indentation of the second segment of the first endopod and a very short terminal segment of the first exopod.
Ricardo Massato Takemoto - One of the best experts on this subject based on the ideXlab platform.
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Infective pentastomid larvae from Pygocentrus nattereri Kner (Pisces, Characidae) from the Miranda River, Pantanal, Mato Grosso do Sul State, Brazil, with notes on their taxonomy and epidemiology.
Folia parasitologica, 2013Co-Authors: Suely C. Giesen, Ricardo Massato Takemoto, Frikkie Calitz, Maria De Los Angeles Perez Lizama, Kerstin JunkerAbstract:Abstract: During parasitological surveys of freshwater fish from the Miranda River, Brazil, 199 Pygocentrus nattereri kner (Characidae) were caught. Two pentastomid families, Subtriquetridae Fain, 1961, represented by its single genus Subtriquetra Sambon, 1922, and Sebekidae Sambon, 1922, represented by three genera, were present. Free-living larvae of Subtriquetra subtriquetra (Diesing, 1835) were collected from the swim bladder. Encysted larvae of Alofia Giglioli, 1922 were found in the abdominal cavity, chambers of the heart, musculature, on the surface of the gonads and swim bladder. Some Alofia larvae were moving freely in the swim bladder. Larvae of Sebekia Sambon, 1922 were encysted in the musculature. Some larvae of Leiperia Sambon, 1922 were found encysted in the musculature and on the surface of the pyloric caeca, whereas others occurred free in the abdominal cavity. In some of the latter, the head was buried deep in the wall of the intestine, stomach or ovaries, whereas the rest of their body remained free. Infective pentastomid larvae were present throughout the year with an overall prevalence of 77%. Both prevalence and intensity were higher in members of the Sebekidae than in Su. subtriquetra, possibly due to the latter's mode of transmission and its high pathogenicity. No sex-related, statistically significant differences (p > 0.05) in prevalence or abundance were found. Fish weight and length had significant but weak positive correlations (r ≤ 0.27) with the abundance of pentastomid larvae, possibly reflecting an increased likelihood of prior exposure in older fish. Parasite abundance had no significant effect on host body condition (p ≥ 0.69). A higher prevalence and monthly mean abundance of pentastomids were seen in the dry season and might be due to increased host densities as habitats dry up. Pygocentrus nattereri represents a new intermediate host record for the genera Alofia, Leiperia and Subtriquetra.
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Metazoan endoparasites of Pygocentrus nattereri (Characiformes: Serrasalminae) in the Negro River, Pantanal, Brazil
Revista brasileira de parasitologia veterinaria = Brazilian journal of veterinary parasitology : Orgao Oficial do Colegio Brasileiro de Parasitologia , 2013Co-Authors: Wagner Vicentin, Kelly Regina Ibarrola Vieira, Luiz Eduardo Roland Tavares, Fábio Edir Dos Santos Costa, Ricardo Massato Takemoto, Fernando PaivaAbstract:In the period of October 2007 to August 2008, 152 specimens of Pygocentrus nattereri were caught in the Negro River in the Nhecolândia region, central Pantanal wetland, State of Mato Grosso do Sul, Brazil. The specimens were necropsied and a total of 4,212 metazoan endoparasites were recovered, belonging to 10 taxons: Procamallanus (Spirocamallanus) inopinatus, Philometridae gen. sp., Eustrongylides sp., Brevimulticaecum sp., Contracaecum sp. (Nematoda), Echinorhynchus paranensis (Acanthocephala), Leiperia gracile, Sebekia oxycephala, Subtriquetra sp. 1 and Subtriquetra sp. 2 (Pentastomida). This is the first record of two parasite species from P. nattereri: E. paranensis and L. gracile.
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Parasitism by argulids (Crustacea: Branchiura) in piranhas (Osteichthyes: Serrasalmidae) captured in the Caiçara bays, upper Paraguay River, Pantanal, Mato Grosso state, Brazil
Neotropical Ichthyology, 2012Co-Authors: Márcio Fontana, Jose Celso De Oliveira Malta, Ricardo Massato Takemoto, Lúcia Aparecida De Fátima MateusAbstract:In this study, 446 fishes were analyzed: 190 Pygocentrus nattereri, 193 Serrasalmus maculatus, and 63 S. marginatus.They were captured in two bays, upper and lower Caicara, in the upper Paraguay River basin, during one hydrological cycle from May 2008 to April 2009. Six species of Branchiura were found: Dolops bidentata, D. longicauda, Dolops sp., Argulus multicolor, A. chicomendesi, and Dipteropeltis hirundo. All fish species were infested by more than one species of Branchiura and the overall prevalence was 33.4%. The following prevalences were observed: 52.6% in P. nattereri; 20.3% in S. maculatus, and 15.8% in S. marginatus. The relative condition factor (Kn) differed significantly between parasitized and non parasitized individuals only in P. nattereri and S. maculatus. There was no correlation between Kn and abundance of parasites nor between body length (Ls) and intensity of infestation, in all three host species.
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Parasitism by argulids (Crustacea: Branchiura) in piranhas (Osteichthyes: Serrasalmidae) captured in the Caiçara bays, upper Paraguay River, Pantanal, Mato Grosso state, Brazil
Sociedade Brasileira de Ictiologia, 2012Co-Authors: Márcio Fontana, Jose Celso De Oliveira Malta, Ricardo Massato Takemoto, Lúcia Aparecida De Fátima MateusAbstract:In this study, 446 fishes were analyzed: 190 Pygocentrus nattereri, 193 Serrasalmus maculatus, and 63 S. marginatus.They were captured in two bays, upper and lower Caiçara, in the upper Paraguay River basin, during one hydrological cycle from May 2008 to April 2009. Six species of Branchiura were found: Dolops bidentata, D. longicauda, Dolops sp., Argulus multicolor, A. chicomendesi, and Dipteropeltis hirundo. All fish species were infested by more than one species of Branchiura and the overall prevalence was 33.4%. The following prevalences were observed: 52.6% in P. nattereri; 20.3% in S. maculatus, and 15.8% in S. marginatus. The relative condition factor (Kn) differed significantly between parasitized and non parasitized individuals only in P. nattereri and S. maculatus. There was no correlation between Kn and abundance of parasites nor between body length (Ls) and intensity of infestation, in all three host species.Foram analisados 446 peixes: 190 Pygocentrus nattereri, 193 Serrasalmus maculatus e 63 S. marginatus, capturados nas baías Caiçara superior e inferior na bacia do alto rio Paraguai, durante um ciclo hidrológico nos meses de maio de 2008 a abril de 2009. Foram encontradas seis espécies de Branchiura: Dolops bidentata, D. longicauda, Dolops sp., Argulus multicolor, A. chicomendesi e Dipteropeltis hirundo. Todos os peixes estavam parasitados por mais de uma espécie de Branchiura e a prevalência geral foi 33,4%. As prevalências foram: P. nattereri 52,6%, S. maculatus 20,3% e S. marginatus 15,8%. O fator de condição relativo (Kn) diferiu significativamente entre indivíduos parasitados e não parasitados apenas em P. nattereri e S. maculatus. Não houve correlação significativa entre Kn e abundância de parasitos, nem entre comprimento padrão (Ls) e intensidade de infestação, nas três espécies de piranhas analisadas
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Parasitism by argulids (Crustacea: Branchiura) in piranhas (Osteichthyes: Serrasalmidae) captured in the Caiçara bays, upper Paraguay River, Pantanal, Mato Grosso state, Brazil
2012Co-Authors: Márcio Fontana, Jose Celso De Oliveira Malta, Ricardo Massato Takemoto, Lúcia Aparecida De Fátima MateusAbstract:Foram analisados 446 peixes: 190 Pygocentrus nattereri, 193 Serrasalmus maculatus e 63 S. marginatus, capturados nas baías Caiçara superior e inferior na bacia do alto rio Paraguai, durante um ciclo hidrológico nos meses de maio de 2008 a abril de 2009. Foram encontradas seis espécies de Branchiura: Dolops bidentata, D. longicauda, Dolops sp., Argulus multicolor, A. chicomendesi e Dipteropeltis hirundo. Todos os peixes estavam parasitados por mais de uma espécie de Branchiura e a prevalência geral foi 33,4%. As prevalências foram: P. nattereri 52,6%, S. maculatus 20,3% e S. marginatus 15,8%. O fator de condição relativo (Kn) diferiu significativamente entre indivíduos parasitados e não parasitados apenas em P. nattereri e S. maculatus. Não houve correlação significativa entre Kn e abundância de parasitos, nem entre comprimento padrão (Ls) e intensidade de infestação, nas três espécies de piranhas analisadas
