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| Registros recuperados: 522 | |
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| PAZ,Arlan de Lima; VAL,Adalberto Luis. |
| ABSTRACT Colossoma macropomum, known locally as tambaqui, is the native fish most farmed in Brazil, however, technological advances are needed to reach efficient production rates. Modulating growth factors, such as growth hormone, may be associated with improved growth rate and feed efficiency. The use of exogenous hormone for fish rearing is prohibited in Brazil, yet the experimental use of bovine hormone can be useful in research aimed at understanding how to stimulate endogenous growth hormones in fish. Therefore, the present study had the strict objective of understanding the effects of growth hormone on the physiology and zootechnical parameters of C. macropomum under experimental conditions. The animals were intraperitoneally injected every fifteen... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aquaculture; Growth performance; Osmorregulation; Hematological parameters. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672018000300197 |
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| Carneiro, William Franco; Pandini, Fernanda; Silva, Lilian Carolina Rosa da; Santos, Lilian Dena dos; Rossato, Katsciane Aparecida; Meurer, Fabio. |
| The objective was to determine the requirement of digestible protein (DP) for Nile tilapia fed with diets based on soybean meal and corn. Two hundred Nile tilapia juveniles, sexually reversed, were used for a trial period of 100 days. The animals were distributed in 20 boxes of 1000 L-1 in a random design with five treatments and four replications, the boxes were connected to a water recirculation system. Five isoenergetic diets were tested with different levels of digestible protein (DP): 20, 25, 30, 35 and 40%. At the end of the experimental period were evaluated the zootechnical performance data. A quadratic effect (p < 0.05) was shown to parameters of final weight, weight gain, final length, fillet yield and visceral fat with the best points that... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 5.06.03.00-0 plant origin feed; Aquaculture; Fish nutrition.. |
| Ano: 2017 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/36122 |
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| Rebouças, Vanessa Tomaz; Lima, Francisco Roberto dos Santos; Cavalcante, Davi de Holanda; Sá, Marcelo Vinícius do Carmo e. |
| The present work aimed at reassessing the suitable range of water pH for culture of Nile tilapia, Oreochromis niloticus L. juveniles in eutrophic water. Two hundred and forty tilapia juveniles (1.37 ± 0.04 g) were stocked in twenty 250-L polyethylene tanks (12 fish per tank) for eight weeks. In the control tanks, the pH of water was not adjusted at any time, varying freely over the entire study. In the slight acidification treatment, the culture water was acidified daily to reach a water pH between 5.5 and 6.5. In the moderate acidification treatment, there were daily applications of HCl solution to reach a water pH between 4.5 and 5.5. In the alkalinization treatment, tanks received daily applications of Na2CO3 and NaOH to achieve a water pH between 8.5... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aquicultura piscicultura pH of water; Tilapia; Aquaculture. |
| Ano: 2016 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/32051 |
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| Magnotti, Caio Cesar França; Castro, Jorgélia de Jesus Pinto; Pedrotti, Fabiola Santiago; Sterzelecki, Fábio Carneiro; Sanches, Eduardo Gomes; Cerqueira, Vinicius Ronzani. |
| The present study aimed to evaluate the activation characteristics of the lebranche mullet spermatozoa in natura and diluted with CF-HBSS for 96h at 4±2°C. The semen was collected from eight wild fish in Florianópolis – SC (Brazil) (27°S) in May, during reproductive migration. Three pools of semen were divided into two treatments: in natura and diluted with CF-HBSS 1:3. The semen was activated with seawater (salinity of 34, pH 8.7 and 4±2°C) to determine: motility time, motility rate and sperm cell membrane integrity. Dilution with CF-HBSS 1:3 increased motility time of diluted semen (15-20% for 6, 12 and 18h). Motility rate was equal to fresh semen for up to 24h of refrigeration and it was 30% higher than in natura semen at 12, 18 and 24h. Cell membrane... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 5.06.03.04-3 gamete conservation; Spermatozoa; Aquaculture; Marine fish farming; Near threatened fish.. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/39563 |
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| Caldini, Nayara Nunes; Capistrano, Hermano Hertz de Almeida; Rocha-Filho, Pedro Roberto Nogueira; Sá, Marcelo Vinícius do Carmo e. |
| The present work aimed to assess the partial replacement of artificial diets by wet bioflocs biomass in the culture of Nile tilapia juveniles. Fish were fed on different combinations of commercial dry diets (CD) and wet bioflocs biomass (BF), as it follows: 75% CD + 25% BF, 50% CD + 50% BF, and 25% CD + 75% BF, dry matter basis. There were also positive control tanks in which the fish received only commercial diet (100% CD), and three negative control tanks where the reductions of dry diets were not compensated by wet bioflocs biomass (75% CD, 50% CD, and 25% CD). Bioflocs were produced in one 500-L outdoor tank, which did not belong to the culture system, and it was called “separate BFT tank”, in which there was a daily adjustment of the C: N ratio of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aquaculture; Bioflocs; Dry diet; Nutrition.. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/42426 |
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| Santos, Daniele Bezerra dos; UFRN; Pontes, Cibele Soares; UFERSA; Freire, Fúlvio Aurélio Morais; UFERSA; Bessa Júnior, Ambrósio Paula; UFERSA. |
| Este estudo avaliou o desempenho zootécnico do camarão marinho Litopenaeus vannamei em diferentes tipos de substratos não consolidados. Juvenis (0,97 ± 0,27 g) foram aclimatados na densidade de 52 m-2, em 21 caixas de polietileno com biofiltros individuais, em um sistema fechado de filtração contínua, sendo submetidos aos tratamentos: 1) A = 25% silte + 25% argila + 25% areia muito fina + 25% areia fina; 2) B = 50% areia fina + 50% areia muito fina e 3) Controle = sem substrato, em um delineamento experimental completamente casualizado, com três tratamentos e sete repetições cada. Os animais foram alimentados com 12% da biomassa/dia com ração peletizada (35% de proteína bruta), ofertada em bandejas e parcelada em duas ofertas diárias (8 e 16h).... |
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Palavras-chave: 5.06.03.02-7 Carcinicultura; Substrato; Etologia aplicada; Litopenaeus vannamei; Aquicultura Ciências Agrárias shrimp culture; Substrate; Applied ethology; Litopenaeus vannamei; Aquaculture. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/6134 |
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| LACERDA,LUIZ D.; SANTOS,JANAÍNA A.; MARINS,ROZANE V.; SILVA,FRANCISCO A.T.F. DA. |
| Abstract This work reviews the limnology of the largest multi-use reservoir in NE Brazil, the Castanhão Reservoir in Ceará State, during 5 years of an extended drought when the reservoir’s volume decreased from 88% to about 30%. Major physical and chemical parameters of the water column, phytoplankton community, trophic state and sediment geochemistry were monitored, as well as the impact from extensive aquaculture. Water quality of the full reservoir was maintained due to hydrodynamics, which transport nutrients to the hypolimnion of a stratified water column, rendering an oligotrophic state to the reservoir, notwithstanding the large nutrient inputs from aquaculture and irrigated agriculture. However, with the extension of the drought period, the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hydrochemistry; Hydrodynamics; Nutrients; Water quality; Sediments; Aquaculture. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000502073 |
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| Aguiar,Jonas; Schneider,Horacio; Gomes,Fátima; Carneiro,Jeferson; Santos,Simôni; Rodrigues,Luis R.; Sampaio,Iracilda. |
| The tambaqui, Colossoma macropomum, is the most popular fish species used for aquaculture in Brazil but there is no study comparing genetic variation among native and farmed populations of this species. In the present study, we analyzed DNA sequences of the mitochondrial DNA to evaluate the genetic diversity among two wild populations, a fry-producing breeding stock, and a sample of fish farm stocks, all from the region of Santarém, in the west of the Brazilian state of Pará. Similar levels of genetic diversity were found in all the samples and surprisingly the breeding stock showed expressive representation of the genetic diversity registered on wild populations. These results contrast considerably with those of the previous study of farmed stocks in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tambaqui; Mitochondrial DNA; Genetic variability; Aquaculture. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000401439 |
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| JUNIOR,ESMAR SOUZA; BARROS,JOSE CARLOS N. DE; PARESQUE,KARLA; FREITAS,RODRIGO R. DE. |
| The demand for alternative food sources is currently in evidence in the world and, therefore, the culture of animal species considered not conventional makes this theme relevant and appropriate. In the present study, the species Pomacea lineata and Pomacea bridgesii, each with three stowage densities (0.5 [T1], 1 [T2], and 1.5 [T3] animal/L), were tested. They were analyzed regarding growth rate, weight gain, final biomass, feed conversion and percentage of survival. There was not any statistically significant difference between the different densities for both species. The final average weight in the three waterworks did not differ significantly in P. bridgesii. In P. lineata, T1 (22.3 ± 1.80g) was significantly higher than T2 and T3. On the other hand,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mollusk; Aquaculture; Alternative food source; Feed conversion; Grow rate; Weight gain; Molusco; Aquicultura; Fonte alternativa de alimento; Conversao alimentar; Taxa de crescimento; Ganho de peso. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000200753 |
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| PAHOR-FILHO,EDUARDO; KLOSTERHOFF,MARTA C.; MARCHIORI,NATALIA C.; PEREIRA JÚNIOR,JOABER. |
| ABSTRACT Monogenoidea pathogenic activity can elicit various histological responses in fish. Species of Ligophorus are specific parasites of mullets, and its relationship with host fish may result in a moderate pathogenic action. In order to ascertain this relationship, estuarine mullets (Mugil liza) were collected in an estuary, reared in laboratory, for three weeks, and forwarded for histological and parasitological analyses. Ligophorus uruguayense (Monogenoidea) infestation in the gills of the mullets was identified. The severe infestation by only one species of Monogenoidea may result from the specificity of these parasites to mullets. Mullets submitted to histological analysis exhibited respiratory epithelium detachment; mild, moderate and severe... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aquaculture; Histological changes; Monogenoidea; Mugilidae; Parasitosis. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000602997 |
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| Costa,Â.A.P.; Roubach,R.; Dallago,B.S.L.; Bueno,G.W.; McManus,C.; Bernal,F.E.M.. |
| RESUMO A intensificação da produção de tilápias pode gerar implicações negativas sobre o desempenho e o bem-estar dos peixes. Assim, é essencial determinar a densidade correta para otimizar a produção. O objetivo deste estudo foi avaliar o desempenho e o bem-estar de tilápias-do-nilo (Oreochromis niloticus) juvenis, com peso inicial médio de 30g (± 2,70), criadas em três diferentes densidades de estocagem, em gaiolas de flutuação. Os peixes foram alimentados três vezes/dia, com ração contendo 32% de proteína bruta, durante 74 dias. O desenho experimental foi completamente ao acaso, com três tratamentos (250 peixes/m3, 350 peixes/m3 e 450 peixes/m3) e quatro réplicas. Os parâmetros físico-químicos da água foram monitorados durante o experimento. A elevação... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal welfare; Aquaculture; Biomass; Cortisol; Stress. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352017000100243 |
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| Henry-Silva,G.G.; Maia,C.S.P.; Moura,R.S.T.; Bessa Junior,A.P.; Valenti,W.C.. |
| The aim of this study was to assess the feasibility of integrated multi-trophic culture of Nile tilapia (Oreochromis niloticus) and Amazon River prawn (Macrobrachium amazonicum) in brackish water by evaluating its limnological characteristics and economic performance. The experiment was completely randomized with four treatments and four repetitions: control treatment with Nile tilapia only, stocked with 2 tilapias/m² (P2C0) and three integrated multi-trophic culture treatments stocked with 2 tilapias/m² and prawns at densities of 4, 8 and 16 prawns/m² (P2C04, P2C08 and P2C16, respectively). The limnological variables of temperature, pH, dissolved oxygen, turbidity, ammonia, orthophosphate and chlorophyll "a" were evaluated and throughout the experiment... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aquaculture; Sustainability; Polyculture. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352015000100265 |
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| Pontes,C. S.; Marques,L. C.; Andreatta,E. R.; Moura,R. S. T.; Henry-Silva,G. G.. |
| ABSTRACTIt is generally believed that increasing feeding frequency has immediate benefits, including reduced nutrient leaching and increased shrimp growth. In this context, the aim this work was to evaluate the effect of feeding frequency in growth performance of Farfantepenaeus paulensis. Juveniles of Farfantepenaeus paulensis were grown for 30 days in pen enclosures, at a stocking density of 5 shrimp/m2. The shrimp were fed on feeding trays at a rate of 8% of their biomass per day, with treatments of one, two, three and four times per day, with four replicates each. The results showed no differences (5% probability) in biomass gain of F. paulensis when feed was offered two, three or four times per day. However, it was observed that the once a day... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Feeding frequency; Shrimp culture; Aquaculture. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352015000501415 |
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| Registros recuperados: 522 | |
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