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| Registros recuperados: 501 | |
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| Viana, Lucilene Finoto; Universidade Estadual de Mato Grosso do Sul; Tondato, Karina Keyla; Universidade Federal do Rio Grande do Sul; Súarez, Yzel Rondon; Universidade Estadual de Mato Grosso do Sul; Lima-Junior, Sidnei Eduardo; Universidade Estadual de Mato Grosso do Sul. |
| In this study, it was examined the reproductive biology of Astyanax. altiparanae, in streams with different levels of environmental disturbance in the Ivinhema river basin (Mato Grosso do Sul State, Brazil). Samplings were conducted between July 2001 and November 2011, at 101 sites, using sieves, seining nets, gill nets and electrofishing. Streams were classified into three levels of environmental integrity. We analyzed 735 specimens, 410 females and 325 males. Females predominated in impacted streams and both sexes presented nearly the same pattern of length distribution in the three levels of environmental integrity. Females reached gonadal maturity with greater lengths (L50 = 55.67mm) in altered and impacted streams and had higher reproductive activity... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Environmental conditions; Fish; Reproductive ecology Zoologia; Ecologia 2.04.06.00-2; 2.05.03.00-8 Zoologia; Ecologia. |
| Ano: 2014 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/21052 |
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| Muniz, Elneison da Rosa; UFPR; Chaves, Paulo de Tarso; UFPR. |
| No litoral brasileiro, a legislação costuma regular as práticas pesqueiras segundo o ciclo de vida das espécies-alvo, mas o fato deste não ser coincidente entre as espécies dominantes nas capturas dificulta o manejo em pescarias multiespecíficas. No litoral de Santa Catarina, o defeso aplica-se apenas à pesca de arrasto, e para tal considera o período reprodutivo do camarão sete-barbas, Xyphopenaeus kroyeri. O presente trabalho investiga a incidência da atividade pesqueira sobre indivíduos em reprodução da betara preta, Menticirrhus americanus, espécie comercialmente apreciada e frequente nas pescarias. As amostragens ocorreram em 2006 e 2007, em desembarques do município de Itapoá, norte do Estado (26°00’S; 48°36’W). Calcularam-se os valores de proporção... |
| Tipo: Atividade reprodutiva |
Palavras-chave: 5.06.01.00-8 Recursos Pesqueiros Marinhos. Reprodução; Peixes; Defeso; Pesca Zoologia breeding; Fish; Management; Fishing. |
| Ano: 2008 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/1230 |
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| Fujimoto, Rodrigo Yudi; Embrapa Tabuleiros Costeiros; Neves, Mikaelle de Souza; Universidade Federal do Pará; Santos, Rudã Fernandes Brandão; Universidade Estadual Paulista “Júlio de Mesquita Filho”; Cruz, Claudinei da; Universidade Estadual Paulista “Júlio de Mesquita Filho”; Diniz, Daniel Guerreiro; Universidade Federal do Pará; Eiras, Jorge Costa; Universidade do Porto. |
| Fish commonly known as acaris or plecos are freshwater armored catfish economically important as a food resource and as ornamental fish. Most of these species are captured in the Amazon region. However, despite its economic importance, there is a lack of knowledge about their biological aspects. Thus, this study aimed to characterize and evaluate the histopathological aspects of important organs as gills, liver, integument and kidney of seven species of armored freshwater ornamental catfish fromGuamáRiver,Pará State,Brazil. All organs showed typical characteristics of organs of other teleosts. In some species, gills and liver showed slight histopathological changes: telangiectasis, edema and morphological changes related to the presence of parasites... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fish; Environmental quality; Acaris; Histology Histologia Animal. |
| Ano: 2014 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/22423 |
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| Viana, Lucilene Finoto; Suarez, Yzel Rondon; Lima-Junior, Sidnei Eduardo. |
| This study aimed at analyzing the influence of different levels of environmental integrity of streams of the Ivinhema river basin (Mato Grosso do Sul State, Brazil) on the diet of A. altiparanae. Samplings were performed from July 2001 to November 2011 at 101 sites, using sieves, seining and gill nets, and electrofishing. Streams were classified into three levels of environmental integrity. We analyzed 664 stomachs with the methods of frequency of occurrence and volumetric analysis index, combined in the Importance Index (AI). The species was omnivorous, with predominance of allochthonous resources. At the least impacted sites, the most representative resource was allochthonous plant material; and in the altered sites in the rainy period the most consumed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 2.05.03.00-8 Ecologia Aplicada stream; Fish; Gut content; Food habits. |
| Ano: 2013 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/19497 |
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| Srivastav,A.K; Rai,Rubi; Mishra,D; Srivastav,S. K; Suzuki,Nobuo. |
| Cadmium is an important metal for modern industrial processes and, being biologically non-essential, poses health hazards to the organisms. In this study we aimed to evaluate the effect of cadmium exposure on the histo-cytology of prolactin cells in the freshwater catfish, Heteropneustes (H.) fossilis. Fish were subjected to 288 mg/L (0.8 of 96 h LC50) and 72 mg/L (0.2 of 96 h LC50) of cadmium chloride for short-term and long-term, respectively. After sacrificing the fish, the blood was collected on 24, 48, 72 and 96 h in short-term and after 7, 14, 21, and 28 days in long-term experiment and analyzed for plasma calcium levels. Also, pituitary glands were fixed on these intervals. The plasma calcium levels of short-term cadmium exposed fish remain... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cadmium; Fish; Prolactin; Pituitary gland. |
| Ano: 2014 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-37432014000300002 |
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| ManiRam,Prasad; Abhishek,Kumar; Diwakar,Mishra; Sunil K,Srivastav; Ajai K,Srivastav. |
| An acute toxicity test was performed by using a four-day static renewal test to determine the LC50 value of aqueous extract of Euphorbia royleana latex for the freshwater fsh, Heteropneustes fossilis. The LC50 values, their upper and lower confdence limits and slope functions were calculated. The LC50 values for aqueous extract of Euphorbia royleana latex at various exposure periods were 7.758 mg/L for 24 h, 5.847 mg/L for 48 h, 4.474 mg/L for 72 h and 3.090 mg/L for 96 h. The regression coeffcient showed that there was signifcant negative correlation between exposure time and different LC values. Hence, it is concluded that the concentration to produce toxicity of latex of Euphorbia royleana is comparable and close to the concentration to produce toxicity... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fish; Euphorbia royleana; Toxicity; LC50. |
| Ano: 2010 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-37432010000100001 |
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| PAVAN,TATIANA R.; NIED,CRISTIAN O.; NORO,MIRELA; ANZILIERO,DENIZ; FRANDOLOSO,RAFAEL; KREUTZ,LUIZ CARLOS. |
| ABSTRACT Molecules with immune modulating activity are ubiquitously distributed in nature and their impact on aquaculture has been exploited in order to increase fish resistance to pathogens. Here, we investigated the effect of inactivated Parapoxvirus ovis (iPPVO) on blood cells and innate and acquired immune response of silver catfish (Rhamdia quelen). iPPVO inoculation had no effect on respiratory burst activity; however, following iPPVO inoculation, we observed a significant decrease on circulating monocytes concomitantly with an increased number of heterophilic granulocytes and thrombocytes, which are the main cells involved in innate immunity and provide connection with acquired immunity. Fish inoculated with a combination of bovine serum albumin... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Immunostimulant; Adjuvant; Antibody; Fish. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000401451 |
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| Santos,Marcella L. Dos; Arantes,Fábio P.; Santiago,Kleber B.; Santos,José E. Dos. |
| The digestive tracts of 44 specimens of Schizodon knerii were studied using anatomical, histological and histochemical techniques. The mouth has terminal position, the lip epithelium is squamous stratified with mucous, claviform cells and taste buds, teeth have an incisive form and the tongue has a stratified squamous epithelium with mucous cells and taste buds. The oropharynx cavity is formed by gill apparatus and pharyngeal teeth. The oesophagus presented pleated mucosa, a stratified squamous epithelium with mucous cells, oesophageal glands and taste buds. The stomach presented cardiac, fundic and pyloric regions, simple prismatic epithelium with tubular glands, with none in the pyloric region. The intestine contains 11-15 pyloric caeca, a simple... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anostomidae; Digestive tract; Fish; Morphology. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000200867 |
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| OLIVEIRA,SHEILA N. DE; RIBEIRO,RICARDO P.; OLIVEIRA,CARLOS A.L. DE; ALEXANDRE FILHO,LUIZ; OLIVEIRA,ALINE M.S.; LOPERA-BARRERO,NELSON M.; SANTANDER,VICTOR F.A.; SANTANA,RENAN A.C.. |
| ABSTRACT In this paper, the existence of a genotype x environment interaction for the average daily weight in GIFT Nile tilapia (Oreochromis niloticus) in different regions in the state of Paraná (Brazil) was analyzed. The heritability results were high in the uni-characteristic analysis: 0.71, 0.72 and 0.67 for the cities of Palotina (PL), Floriano (FL) and Diamond North (DN), respectively. Genetic correlations estimated in bivariate analyzes were weak with values between 0.12 for PL-FL, 0.06 for PL and 0.23 for DN-FL-DN. The Spearman correlation values were low, which indicated a change in ranking in the selection of animals in different environments in the study. There was heterogeneity in the phenotypic variance among the three regions and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oreochromis niloticus; Fish; Genetic gain; Heritability; Genetic correlation.. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000602931 |
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| Diniz,Daniel G.; Varella,Jamille E.A.; Guimarães,Maria Danielle F.; Santos,Arthur F.L.; Fujimoto,Rodrigo Y.; Monfort,Karla C.F.; Pires,Marcus A.B.; Martins,Maurício L.; Eiras,Jorge C.. |
| The infection of the estuarine teleost fishes Mugil gaimardianus Desmarest, 1831 (Mugilidae), Arius phrygiatus Valenciennes, 1839 (Ariidae), Conodon nobilis Linnaeus, 1759 (Haemulidae), Cetengraulis edentulus Cuvier, 1829 (Engraulidae), and Anableps anableps Linnaeus, 1758 (Anablepidae) by praniza larvae of Gnathiidae (Crustacea, Isopoda) was studied in specimens fished off the Atlantic Ocean in Northeast of Pará State, near Bragança, Brazil. The highest infection prevalence value was found in Anableps anableps (42.3%) and the lowest in Conodon nobilis (9.1%). The mean intensity varied from 1 parasitein Conodon nobilis to 19.5 in Arius phrygiatus. A description of the larvae is provided. The morphology of the mouthparts is related to the blood sucking... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fish; Parasites; Isopoda; Gnathiidae; Brazil. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652008000400007 |
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| ISAAC,VICTORIA J.; ALMEIDA,MORGANA C.; GIARRIZZO,TOMMASO; DEUS,CLAUDIA P.; VALE,ROZEILZA; KLEIN,GILMAR; BEGOSSI,ALPINA. |
| ABSTRACT The present study analyzed and compared the daily consumption of foods of animal origin in eleven communities of the Lower Amazon, Trombetas and Purus Rivers, representing three different management systems and levels of conservation in the Brazilian Amazon. All food items of animal origin were weighed by at least 10% of the families in the study communities during a week in each period of the flood cycle between 2006 and 2008. Fish was the most important food, and was consumed during six days of the week, with an average rate of 169 kg.person-1.year-1. Game was second in importance, with 37 kg.person-1.year-1. This yearly rate of fish consumption is one of the highest in the world and is almost double the minimum recommended by the World Health... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fish; Game meat; Management; Deforestation. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000502229 |
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| Bezerra,Dandara M.M.; Nascimento,Douglas M.; Ferreira,Emmanoela N.; Rocha,Pollyana D.; Mourão,José S.. |
| This work was carried out in two small fishing communities, Barra de Mamanguape and Tramataia, Northeastern Brazil. The aim was to study these traditional fishermen's knowledge and perception about tide and wind classifications, as well as their fishing strategies and techniques. Our research methodology involved various techniques: free interviews and semi-structured ones, guided tours and direct observations. The results obtained show the fishermen's classification of the tides according to the phases of the moon: 'breaking tide', 'flushing tide', 'dead tide' and 'big tide' designated technically these last as neap tide and spring tide, respectively. Wind is also an essential factor for the fishermen to make successful catches, and they classify it... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Artisanal fishing; Ethnoictihology; Fish; Fishing communities; Lunar-tide cycle. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000300020 |
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| SUTILI,FERNANDO J.; CUNHA,MAURO A.; ZIECH,ROSANGELA E.; KREWER,CARINA C.; ZEPPENFELD,CARLA C.; HELDWEIN,CLARISSA G.; GRESSLER,LETICIA T.; HEINZMANN,BERTA M.; VARGAS,AGUEDA C.; BALDISSEROTTO,BERNARDO. |
| In vitro and in vivo activity of the Lippia alba essential oil (EO) against Aeromonas sp. was evaluated. In the in vitro assay the minimum inhibitory concentration (MIC) and a minimum bactericidal concentration (MBC) of EO for Aeromonas cells were determined using the microdilution method. Twenty five strains of Aeromonassp. isolated from infected fish obtained from local fish farms were used. MIC and MBC values were 2862 and 5998 µg mL-1 for L. alba EO and 0.5 and 1.2 µg mL-1for gentamicin, respectively. In the in vivo assay silver catfish juveniles (Rhamdia quelen) (7.50 ± 1.85 g and 10.0 ± 1.0 cm) with typical injuries associated to Aeromonas infection were divided into four treatments (in triplicate n=10): untreated fish (negative control), 10 mg L-1... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antibacterial activity; Essential oils; Fish; Gentamicin. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000100095 |
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| Registros recuperados: 501 | |
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