Oliveira M.S.B.,Niversidade Federal do Oeste do Para UFOPA |
Goncalves R.A.,Niversidade Federal do Oeste do Para UFOPA |
Goncalves R.A.,University do Estado do Amapa |
Tavares-Dias M.,University do Estado do Amapa |
Tavares-Dias M.,Laboratorio Of Sanidade Of Organismos Aquaticos
Studies on Neotropical Fauna and Environment | Year: 2016
The present study compared the community of parasites in populations of Triportheus angulatus and T. curtus from a tributary of the Amazon River in northern Brazil. All hosts had one or more parasite species, 862,687 parasites were collected from T. curtus and 302,008 from T. angulatus. Species richness of parasites, Shannon diversity index and evenness index were higher for T. angulatus. The parasite communities of both hosts was similar (99%) and composed by Ichthyophthirius multifiliis, Anacanthorus pitophallus, metacercariae and Procamallanus (Spirocamallanus) inopinatus, with dominance of I. multifiliis. However, low infection level by Piscinodinium pilullare, Dolops sp. and Contracaecum larvae occurred only in T. angulatus, and Spironucleus sp. was found only in T. curtus. There were differences in the prevalence, intensity and mean abundance for some parasites of both hosts. There was aggregated dispersion of parasites in both hosts, but the infection of P. (S.) inopinatus in T. angulatus showed a random dispersion. For T. angulatus and T. curtus, the diversity and abundance of parasites were influenced by the host size. This was the first report of these parasite species for T. curtus, as well as of I. multifiliis, P. pilullare, Dolops sp., P. (S.) inopinatus and Contracecum sp. for T. angulatus. © 2016 Taylor & Francis
PubMed | University do Estado do Amapa and Laboratorio Of Sanidade Of Organismos Aquaticos
Type: Journal Article | Journal: Revista brasileira de parasitologia veterinaria = Brazilian journal of veterinary parasitology : Orgao Oficial do Colegio Brasileiro de Parasitologia Veterinaria | Year: 2015
This study compared the parasite communities of Hoplias malabaricus and Hoplerythrinus unitaeniatus from Amazon river system. Hoplias malabaricus were infected by Ichthyophthirius multifiliis, Piscinoodinium pillulare, Tetrahymena sp., Urocleidoides eremitus, Braga patagonica, metacercariae of Clinostomum marginatum, Procamallanus (Spirocamallanus) inopinatus, larvae of Contracaecum sp. and larvae of Nomimoscolex matogrossensis. Hoplerythrinus unitaeniatus were also infected by these same species of protozoans, nematodes, digeneans and cestodes, except for Tetrahymena sp. and B. patagonica, which were replaced by Argulus pestifer, Urocleidoides sp., Whittingtonocotyle caetei, Whittingtonocotyle jeju and Gorytocephalus spectabilis. For both hosts, I. multifiliis and P. pillulare were the predominant parasites. Most of the parasites presented an overdispersion. Parasite species richness, Brillouin diversity, evenness and Berger-Parker dominance were similar for the two hosts. The length and weight of H. malabaricus showed a positive correlation with the abundance of U. eremitus and Contracaecum sp., while the weight of H. unitaeniatus showed a positive correlation with the abundance of I. multifiliis. The diversity of ectoparasites seemed to be influenced by the behavior of these two hosts. This was shown by the similar parasite communities and was characterized by low species diversity, low evenness and low richness, and by a high prevalence of ectoparasites.
PubMed | Instituto Chico Mendes Of Conservacao Da Biodiversidade Icmbio, Federal University of Pará and Laboratorio Of Sanidade Of Organismos Aquaticos
Type: Journal Article | Journal: Revista brasileira de parasitologia veterinaria = Brazilian journal of veterinary parasitology : Orgao Oficial do Colegio Brasileiro de Parasitologia Veterinaria | Year: 2016
Among Kinetoplastida, the Trypanosoma is the genus with the highest occurrence infecting populations of marine fish and freshwater in the world, with high levels of prevalence, causing influences fish health and consequent economic losses, mainly for fish populations in situation stress. This study investigated infections of Hypostomus spp. by Trypanosoma spp. and leeches, as well as blood parameters of this host in the network of tributaries of the Tapajs River in the state of Par, in the eastern Amazon region in Brazil. Of the 47 hosts examined, 89.4% were parasitized by Trypanosoma spp. and 55.4% also had leeches attached around the mouth. The intensity of Trypanosoma spp. increased with the size of the host, but the body conditions were not influenced by the parasitism. The number of red blood cells, and hemoglobin, mean corpuscular volume (MCV), mean corpuscular hemoglobin concentration (MCHC), mean corpuscular hemoglobin (MCH), total number of leukocytes and thrombocytes showed variations and negative correlation with the intensity of Trypanosoma spp. in the blood of the hosts. The results suggest that the leeches were vectors of Trypanosoma spp. in Hypostomus spp.
PubMed | Federal University of Pará and Laboratorio Of Sanidade Of Organismos Aquaticos
Type: | Journal: Revista brasileira de parasitologia veterinaria = Brazilian journal of veterinary parasitology : Orgao Oficial do Colegio Brasileiro de Parasitologia Veterinaria | Year: 2016
The aim of this study was to investigate the component community of parasite metazoans of Piaractus brachypomus in the lower Amazon River, northern Brazil. From 34 necropsied fish, 27,384 metazoan parasites were collected, such as Anacanthorus spathulatus, Mymarothecium viatorum and Notozothecium janauachensis (Monogenoidea); Spectatus spectatus and Contracaecum sp (Nematoda); Clinostomum marginatum and Dadaytrema oxycephala (Digenea); and Argulus carteri and Ergasilus sp. (Crustacea). The dominant species was S. spectatus followed by monogenoidean species, and there was aggregated dispersion of parasites, except for D. oxycephala and Contracaecum sp., which presented random dispersion. Positive correlation among the abundance of the three monogenoideans species were found, thus indicating that there was no competition between the species of these parasites on the gills of hosts. The abundances of some parasite species showed positive correlations with the size of the hosts, but the condition factor of the fish was not affected by the parasitism levels. It showed that this host had a metazoan community characterized by high species richness of metazoans, low evenness and high diversity of parasites, with prevalence of endoparasites, including larval stages. This was the first record of C. marginatum, A. carteri, Ergasilus sp. and Contracaecum sp. for P. brachypomus.
Pinheiro D.A.,Laboratorio Of Sanidade Of Organismos Aquaticos |
Santos E.F.,Laboratorio Of Sanidade Of Organismos Aquaticos |
Neves L.R.,Laboratorio Of Sanidade Of Organismos Aquaticos |
Tavares-Dias M.,Laboratorio Of Sanidade Of Organismos Aquaticos
Boletim do Instituto de Pesca | Year: 2015
This study evaluated the parasitic infestations in hybrid tambatinga (Colossoma macropomum and Piaractus brachypomus) farmed in net-cage in the State of Amapá, Northern Brazil. The mouth, operculum, gills and gastrointestinal tract of 50 fish were examined to collection of protozoans and metazoans. Of examined fish, 60% had the gills infected by Ichthyophthirius multifiliis (Ciliophora), Piscinoodinium pillulare (Dinoflagellida) and by Mymarothecium boegeri (Monogenoidea). The low parasitic community consisted of high parasitism by protozoans and low parasitism by monogenoideas, which occurred in 10% of the hosts. Thus, there was dominance of I. multifiliis and P. pillulare, both parasites with aggregated dispersion in the hosts. The parasitism found have not effect in the body condition of hosts, because the relative condition factor (Kn) of parasitized (Kn = 0.999 ± 0.008) and non-parasitized (Kn = 1.000 ± 0.018) was similar, probably due to moderate infestation levels. This first study on parasitic infestation levels in hybrids tambatinga from Brazil showed a low species richness of parasites. © 2015, Instytut Technologii Drewna. All rights reserved.