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| Registros recuperados: 111 | |
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| OLIVEIRA,Marcos Sidney Brito; SILVA,Luís Maurício Abdon; PRESTES,Luiza; TAVARES-DIAS,Marcos. |
| ABSTRACT Length and weight data are useful in fisheries management and standard results of fish monitoring programs. Length-weight relationship (LWR) is used for estimating the weight corresponding to a given length, and the condition factor is used to compare the body condition, fatness or health of fish populations. This study aimed to estimate the LWR and the condition factor for 12 freshwater fish species from the Igarapé Fortaleza basin, a tributary of the Amazonas River system in the State of Amapá, eastern Amazon (Brazil). The coefficient of determination, the allometric condition factor and the allometric coefficient varied among species, and were compared with populations elsewhere. In 83.3% of the species, the allometric coefficient remained... |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Allometry; Brazil; Freshwater fish; Growth pattern. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672020000100008 |
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| GONÇALVES,Bianca Barata; OLIVEIRA,Marcos Sidney Brito; BORGES,William Felix; SANTOS,Gracienhe Gomes; TAVARES-DIAS,Marcos. |
| ABSTRACT This study investigated the diversity of metazoan parasites in Colossoma macropomum from the Jari River, in the eastern Amazon, northern Brazil. We collected a total of 4966 parasites from 34 fishes, including monogeneans (Anacanthorus spathulatus, Mymarothecium boegeri, Notozothecium janauachensis and Linguadactyloides brinkmanni), nematodes (Spectatus spectatus larvae, Contracaecum sp. larvae andProcamallanus (Spirocamallanus) inopinatus), digeneans (Cladorchiidae metacercariae), acanthocephalans (Neoechinorhynchus buttnerae), crustaceans (Ergasilus turucuyus, Argulus multicolor, Perulernaea gamitanae and Braga patagonica), mites and leeches. The dominance was of monogenean species, found in the gills of the hosts. The parasites exhibited high... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aggregation; Diversity; Endoparasites; Freshwater fish. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672018000300211 |
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| TAVARES-DIAS,Marcos; OLIVEIRA,Marcos Sidney Brito; GONÇALVES,Raissa Alves; NEVES,Lígia Rigor. |
| ABSTRACT Assessment of biodiversity is fundamental for the understanding of ecological interactions, but fish parasites were neglected in biodiversity estimates for a long time. The aim of this paper was to investigate the diversity of parasites in Satanoperca jurupari in the Amazon River system in Brazil. Of the fish examined, 90.0% were parasitized by one or more species of protozoans and metazoans, and a total of 3,110,094 parasites were collected. Ichthyophthirius multifiliis, Piscinoodinium pillulare, Sciadicleithum juruparii, Clinostomum marginatum, Posthodiplostomum sp., Genarchella genarchella, Argulus multicolor and Ergasilus coatiarus were found. However, I. multifiliis and P. pillulare were the most prevalent, abundant and dominant parasites,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aggregation; Cichlidae; Freshwater fish; Parasites. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672017000200155 |
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| MACHADO-EVANGELISTA,Mariana; ESGUÍCERO,André Luiz Henríques; ARCIFA,Marlene Sofia; PEREIRA,Thiago Nilton Alves. |
| The conservation of diverse and well-distributed fish taxa, as the genus Leporinus, relies intrinsically on the knowledge of the ecological attributes of its representatives. Aiming to increase this knowledge, studies on diet and ecomorphology are ideal to provide important information about species ecology. Thus, this study aimed to analyze aspects of feeding ecology of L. reticulatus, from the upper Rio Juruena, Mato Grosso State, Brazil. The diet of specimens in different ontogenetic stages was compared, as well as their teeth morphology and ecomorphological attributes. Leporinus reticulatus presented omnivorous diet, with higher consumption of invertebrates by smaller specimens (younger ones), and gradual introduction of plant items in larger specimens... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Neotropical ichthyofauna; Freshwater fish; Trophic ecology; Ontogenetic morphological variation. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672015000400383 |
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| Tavares-Dias,Marcos; Affonso,Elizabeth Gusmão; Oliveira,Sarah Ragonha; Marcon,Jaydione Luiz; Egami,Mizue Imoto. |
| The aim of this study was not only to determine the red blood cells parameters, thrombocyte and leukocyte counts in farmed Brycon amazonicus (matrinxã), to compare these parameters among Bryconinae species from literature, and also to investigate the presence of special granulocytic cells in these fish. The results of the blood cells parameters here established for farmed B. amazonicus, a species of great economic importance in Brazilian aquaculture, could help a better understanding of the blood features in natural populations of this Amazon species. Blood parameters varied between Bryconinae species investigated, mainly the red blood cell counts, hemoglobin, hematocrit and mean corpuscular volume (MCV). The presence of the blood granulocytes, neutrophils... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Leukocytes; Freshwater fish; Blood; Amazon; Brycon amazonicus; Bryconinae. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672008000400026 |
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| TAVARES-DIAS,Marcos; ALVES GONÇALVES,Raissa; BRITO OLIVEIRA,Marcos Sidney; RIGÔR NEVES,Ligia. |
| ABSTRACT This study investigated the parasitic fauna of Cichlasoma bimaculatum of a tributary from the Amazon River system, northern Brazil. The prevalence of infection was 94.6 % and, in total, 428 267 parasites, such as Ichthyophthirius multifiliis, Piscinoodinium pillulare (Protozoa), Gussevia arilla (Monogenoidea), Posthodiplostomum sp. (Digenea) and Procamallanus (Spirocamallanus) inopinatus (Nematoda) were collected. However, the dominance was mainly of I. multifiliis, while P. (S.) inopinatus was the parasite species with the lower levels of prevalence and abundance of infection. These parasite species showed an aggregated dispersion pattern. The parasitic fauna was characterized by the presence of few species of parasites with high prevalence and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aggregation; Endoparasites; Freshwater fish; Infection. |
| Ano: 2017 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2017000200006 |
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| Silva, Andréa Fernanda Lourenço da; Universidade Federal da Grande Dourados; Russo, Márcia Regina; Universidade Federal da Grande Dourados - UFGD; Ramos, Lucimara de Araújo; Universidade Federal da Grande Dourados - UFGD; Rocha, Aryadne Simões; Universidade Estadual de Mato Grosso do Sul. |
| We evaluated the growth and diet composition of hybrid surubim larvae (Pseudoplatystoma corruscans x P. reticulatum) produced in two fish farming by using different systems of feeding with natural plankton: M I, larvae are transferred to fertilized fish pond for being freely fed with natural plankton; M II, larvae are remained inside laboratory in glass fiber boxes and plankton are gathered with a plankton net and offered in a controlled way. It was collected 10 individuals daily during the feeding period with live plankton for 20 days. After the biometry, stomachs were opened and the food items identified and quantified by the volumetric method. The items were represented by algae, protozoa, microcrustacean, insect larvae and surubim fragments... |
| Tipo: Estudos morfológicos |
Palavras-chave: Ecologia larviculture; Freshwater fish; Diet 2.05.03.00-8 Ecologia aplicada. |
| Ano: 2013 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/15359 |
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| Sousa, Fabricio Barros de; Universidade Federal Rural da Amazônia; Soares, Maria Gercilia Mota; Instituto Nacional de Pesquisas da Amazônia; Prestes, Luiza; Universidade do Estado do Amapá. |
| Fish is the main source of protein in the Amazon and fishing is one of the most important sources of income for the Amazonian population. Serrasalmus spilopleura is a species that have been increasingly consumed by riverside communities, although it is only occasionally commercialized at regional markets. Therefore, this work sought to generate information about the population biology of S. spilopleura captured in floodplain lakes, Jaitêua and São Lourenço, in Manacapuru, Amazonas State. The population parameters were estimated by analyzing the distribution of the length frequency with the help of the ELEFAN I routine of the FISAT II program. The weight/length relationship was estimated by linear regression, longevity by Taylor’s method, rate of natural... |
| Tipo: Population dynamics of fish |
Palavras-chave: 2.05.00.00-9 growth; Mortality; Freshwater fish; Weight/length relationship; ELEFAN Ecologia. |
| Ano: 2013 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/15749 |
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| Ohara, Willian Massaharu; Queiroz, Luiz Jardim de; Zuanon, Jansen; Torrente-Vilara, Gislene; Vieira, Fabíola Gomes; Doria, Carolina da Costa. |
| Biological collections preserve the biodiversity of a nation. The fish collection of the Universidade Federal de Rondônia, recently established, contains about 41% of freshwater fish species known to occur in Brazil, and 24% of South America. The biological material is distributed into 1,067 species, 21,963 lots and 149,192 specimens, gathered during five years of work. From this collection, 99% of the lots have georeferenced location, and 94% of the species were sampled in the Madeira River basin, the largest tributary in flow, drainage area and sediment discharge of the Amazonas River basin. Among the 1,008 species collected in the Madeira River basin, 80% were reviewed by Brazilian, North American and French experts, and represents the highest richness... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazil; Freshwater fish; Madeira River basin; High species richness Zoologia Brazi; Freshwater fish; Madeira River basin; High species richness Zoologia. |
| Ano: 2015 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/26920 |
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| Tavares-Dias, Marcos; Empresa Brasileira de Pesquisa Agropecuária; Neves, Ligia Rigôr; Empresa Brasileira de Pesquisa Agropecuária; Pinheiro, Douglas Anadias; Universidade Federal do Amazonas; Oliveira, Marcos Sidney Brito de; Universidade do Estado do Amapá; Marinho, Renata das Graças Barbosa; Universidade Federal do Amapá. |
| This work is the first study on parasitic fauna of Curimata cyprinoides Linnaeus, 1766 (Curimatidae) and the host-parasite relationship. The total of 154,740 parasites such as Ichthyophthirius multifiliis (Ciliophora), trophozoite of Spironucleus sp. (Hexamitidae), Urocleidoides sp. (Monogenoidea), Digenea gen. sp. and Polymorphus sp. (Polymorphidae) were collected. The component community showed low diversity (HB = 0.004 ± 0.020) and parasite species richness (1.4 ± 0.6). However, I. multifiliis and Urocleidoides sp. were prevalent and with higher intensity on the host population and also aggregated the distribution pattern. The occurrence of these ectoparasites in C. cyprinoides may be a consequence of its alimentary diet. Positive correlation between... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sanidade de Animais Aquáticos ecology; Gills; Freshwater fish; Monogenoidea; Protozoans. |
| Ano: 2013 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/19649 |
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| Borges, William Felix; Oliveira, Marcos Sidney Brito de; Santos, Gracienhe Gomes; Tavares-Dias, Marcos. |
| The aim of this study was to investigate the parasites fauna of Ancistrus leucostictus, Hypostomus ventromaculatus, Ancistrus sp. and Hemiancistrus sp. from the Igarapé Fortaleza River (Amapá State, Brazil), besides making a checklist of the parasite species in Loricariidae from Brazil. A total of 53 fishes were collected from November 2013 to August 2014. In the hosts, a total of 1,559 parasites of seven taxa were collected: Unilatus unilatus, Trinigyrus mourei, undetermined metacercariae, Genarchella gernachella, Raphidascaris (Sprentascaris) sp., Gorythocephalus elongorchis and Proteocephalus sp. Ectoparasite species were frequent in the examined Loricariidae species, which also had larval stages of endoparasites. The hosts with the highest sampled... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Armored catfish ectoparasites; Freshwater fish; Loricariidae.. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/40621 |
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| Vasconcelos, Huann Carllo Gentil; Tavares-Dias, Marcos. |
| Host-parasite interactions between crustaceans and six fish species (Psectrogaster falcata, Ageneiosus ucayalensis, Acestrorhynchus falcirostris, Hemiodus unimaculatus, Serrasalmus gibbus and Geophagus proximus) from a reservoir in eastern Amazon, northern Brazil, were investigated. Eight hundred and seventy-eight parasites belonging to three crustacean species, Excorallana berbicensis, Argulus chicomendesi and Ergasilus turucuyus, which parasitized the hosts’ mouth, gills and tegument, were collected from 295 fish and examined. High infestation levels were caused by E. berbicensis on the body surface of the hosts. Excorallana berbicensis showed aggregate dispersion, except in S. gibbus, while E. turucuyus showed random dispersion in A. falcirostris. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Body condition; Ectoparasites; Environment; Freshwater fish; Infestation. |
| Ano: 2016 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/29601 |
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| Dias, Marcos Tavares. |
| This paper describes the first study on parasite diversity in Auchenipterus nuchalis Spix & Agassiz, 1829 (Auchenipteridae). In 31 fish caught in a tributary of the Amazon River, 10,708 parasites were collected, such as Ichthyophthirius multifiliis, Piscinoodinium pilullare, Cosmetocleithrum striatuli, metacercariae of Posthodiplostomum sp, and larvae and adults of Procamallanus (Spirocamallanus) inopinatus. These parasite species showed aggregated dispersion, except for C. striatuli, which had a uniform dispersion. The component community of parasites showed a low Brillouin diversity (0.67 ± 0.27), low species richness (3.5 ± 0.8) and low evenness (0.43 ± 0.17), and it was characterized by the presence of species with high prevalence and abundance.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Parasitologia Brazil; Diversity; Freshwater fish; Parasites. Zoologia. |
| Ano: 2017 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/32836 |
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| Silva, Marlene Rodrigues da; Universidade Estadual de Maringá; Natali, Maria Raquel Marçal; Universidade Estadual de Maringá; Hahn, Norma Segatti; Universidade Estadual de Maringá. |
| the esophagus, stomach and intestine of Satanoperca pappaterra using histological techniques. The species presents detritivore-invertivore feeding habit and is widely distributed in Neotropical continental waters. The esophagus is short, the stomach is small with saccular form and the intestine is long. The histological sections were stained using hematoxylin/eosin and Periodic Acid Schiff. Throughout the digestive tract, the gastric wall is composed by four different tunicae: mucosa, submucosa, muscularis externa and serosa, besides distinct intrinsic innervation represented by the submucosal and myenteric ganglionated plexuses. Depending on the organ, several characteristics were peculiar such as the external muscle layer of the esophagus that permeates... |
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Palavras-chave: Freshwater fish; Cichlidae; Histological methods; Digestive tract. |
| Ano: 2012 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/8956 |
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| TAVARES-DIAS,MARCOS; NEVES,LIGIA R.. |
| ABSTRACT The community composition of parasites was characterized in Astronotus ocellatus from a tributary of the Amazon River, northern Brazil. The prevalence was 87.9%, and a total of 526,052 parasites were collected, with a mean of 15,941 parasites per host. Nine taxa of ecto- and endo-parasites were identified, but Ichthyophthirius multifiliis was the dominant species, while Piscinoodinium pillulare, Clinostomum marginatum and Argulus multicolor were the least prevalent parasites. The parasite community was characterized by a low species richness, low diversity and low evenness. Host body size was not found to influence the composition of the parasite community, and there was no significant correlation between abundance of any parasite species and host... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aggregation; Amazon; Ectoparasites; Endoparasites; Freshwater fish. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000502305 |
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| Arantes,Fábio P.; Savassi,Lourenço A.; Santos,Hélio B.; Gomes,Marcos V.T.; Bazzoli,Nilo. |
| The increasing amounts of heavy metals entering aquatic environments can result in high accumulation levels of these contaminants in fish and their consumers, which pose a serious risk to ecosystems and human health. We investigated the concentrations of mercury (Hg), cadmium (Cd), zinc (Zn), chromium (Cr), and lead (Pb) in muscle, liver, and spleen tissues of Pseudoplatystoma corruscans specimens collected from two sites on the Paraopeba River, Brazil. The level of heavy metals concentrations in the tissues was often higher in viscera (i.e. liver and spleen) than in muscle, and thus, the viscera should not be considered for human consumption. Correlations between metal concentrations and fish size were not significant. Although the levels of muscle... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Contamination; Freshwater fish; Heavy metal; Human health. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000100137 |
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| Fujimoto,Rodrigo Y.; Neves,Mikaelle S.; Santos,Rudã F.B.; Souza,Natalino C.; Couto,Márcia V.S. do; Lopes,Josiane N.S.; Diniz,Daniel G.; Eiras,Jorge C.. |
| A total of 281 specimens of freshwater armored ornamental fish species (Leporacanthicus galaxias, Lasiancistrus saetiger,Cochliodonsp., Hypostomussp.,Pseudacanthicus spinosus, Ancistrussp. andRineloricariacf. lanceolata) were captured at the hydrological basin of Guamá River, Pará, Brazil. The infection by Trypanosoma spp. was inspected. The morphological and morphometric characterization of the parasites and the hematological parameters were determined. Leporacanthicus galaxias andPseudacanthicus spinosus presented 100% infection prevalence, and the other species showed a variable prevalence of infection. The parasites showed clearly different morphotypes and dimensions, and probably belong to different species. The hematological response to the infection... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Freshwater fish; Hematological parameters; Infection; Trypanosoma spp. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000301149 |
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| MARIANO,WAGNER S.; AZEVEDO,SAULO B.; GOMES,FRANCISCO L.; LIMA,LIANA B.D.; MORON,SANDRO E.; TAVARES-DIAS,MARCOS. |
| Abstract: This study investigated the physiological effects of a pesticide based on Bacillus thuringiensis (Dipel-WP®) added in the water and diet of Piaractus mesopotamicus during 24 and 48 h. It was added 0.13 g of de B. thuringiensis per kg of commercial feed; and for the fish subjected to the biopesticide in the water of the tanks, it was added 0.13 g/L of the biopesticide. Plasma levels of sodium, chloride, potassium, cholesterol, glucose, triglycerides, cortisol, total protein, alanine aminotransferase (ALT), aspartate aminotransferase (AST), hematocrit, hemoglobin, erythrocytes number, mean corpuscular volume (MCV) and mean corpuscular hemoglobin concentration (MCHC), number of thrombocytes and leukocytes were determined. Cortisol, lactate, glucose,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biochemistry; Blood; Farm fish; Freshwater fish. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000300612 |
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| Registros recuperados: 111 | |
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