Efeito da vitamina C no ganho de peso e em parâmetros hematológicos de tambaqui

Chagas, Edsandra Campos; Val, Adalberto Luís

doi:10.1590/s0100-204x2003000300009

Cited by 48 publications

(32 citation statements)

References 18 publications

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“…The data obtained by Chagas et al (2007) when they evaluated different feeding rates (1.0, 3.0 and 5.0) for tambaqui (Colossoma macropomum) reared in net cages revealed higher averages (P<0.05) of weight gain for fish subjected to the rate of 3.0 and 5.0% feeding when compared with animals subjected to 1.0% feeding. On the other hand, the authors described that the best results of apparent feed conversion (AFC) were obtained with fish under 1.0% feeding, for at 3.0 and 5.0%, the AFC indices found were 4.86 and 7.07, respectively, and these values are superior to those of the present experiment.…”

Section: Resultsmentioning

confidence: 99%

Feeding rate for pacu reared in net cages

et al. 2012

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-The objective of this study was to evaluate the feeding management of pacu juveniles (P. mesopotamicus) under different feeding rates and its relation with productive performance, body composition and hematological characteristics.A total of 300 fish with initial weight of 84.75±4.52 g were distributed in a completely randomized design composed of four treatments (100, 90, 80 and 70% of feed supply) and five repetitions. The amount of feed was stipulated according to the quantity supplied in the treatment until apparent satiation (100%) of the day before. The decrease in the feeding rate to 70% over satiation apparently improves the apparent feed conversion without harming performance, body composition or biochemical and hematological characteristics of pacu juveniles reared in net cages.Key Word: amount of feed, feeding management, intensive aquaculture, native species Revista Brasileira de Zootecnia

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Section: Resultsmentioning

confidence: 99%

Feeding rate for pacu reared in net cages

et al. 2012

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“…Their results in common carp (Cyprinus carpio) showed that a normal versus high ascorbate intake did not influence the physiological stress indicators, such plasma cortisol, not supporting the hypothesis that high concentration of ascorbate would inhibit steroidogenesis. The vitamin C requirements of matrinxã is not yet established, but the doses tested were within the range determined for other native species: 139 mg kg.ration -1 for pacú (Piaractus mesopotamicus) (Martins, 1995), 25 mg kg.ration -1 for acará (Astronotus ocellatus) (Fracalossi et al, 1998) and 100 mg kg.ration -1 for tambaqui (Colossoma macropomum) (Chagas & Val, 2003).…”

mentioning

confidence: 76%

“…The levels of vitamin tested were established according to previous studies with native fish (Martins, 1995;Fracalossi, 1998;Chagas and Val, 2003). Ascorbyl polyphosphate (Stay C 35, Roche) was the source of vitamin C.…”

Section: Methodsmentioning

confidence: 99%

Physiological responses of matrinxã (Brycon amazonicus) fed different levels of vitamin C and submitted to air exposure

Abreu

Urbinati

2006

Acta Amaz.

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The role of vitamin C on physiological responses of matrinxã (Brycon amazonicus) submitted to air exposure was analyzed. Nine hundred fish (70.15 g) were distributed in fifteen 500 l boxes (60 fish.box -1 ) and fed five rations (treatments): Control (no vitamin C); T100 (100 mg); T200 (200 mg); T400 (400 mg) and T800 (800 mg of vitamin C kg.ration -1 ). Each ration was offered to fish of three boxes during 60 days before the stress challenge that consisted of exposing fish to air for two minutes. Samplings were carried out for 5, 15, 30 and 60 minutes after the air exposure. Blood was collected for glucose, cortisol, total protein, sodium, chloride, hematocrit, hemoglobin determination, and white and red cell count. Liver was removed for hepatosomatic index (HSI) calculation and glycogen determination. Vitamin C did not affect the levels of cortisol, chloride, total protein, hemoglobin, leukocytes, hepatic glycogen or HSI in air exposed fish. Blood glucose levels elevation observed 60 minutes after the challenge did not depend on the levels of vitamin C, nor did the drop in serum sodium levels verified 60 minutes after stressor. In general, hematocrit did not change by effect of vitamin C but it was lower at 15 and 30 minutes after the challenge. The number of erythrocytes decreased in fish after 5 minute sampling in all treatments, especially at 30 and 60 minutes. The air exposure evoked alterations in stress indicators of matrinxã, and the vitamin C did not alter the responses. KEY WORDSBrycon amazonicus, capture, stress, ascorbyl -polyphosphate. de glicose, cortisol, proteína total, sódio, cloreto, hematócrito, hemoglobina, contagem Respostas fisiológicas de matrinxã (Brycon amazonicus) arraçoados com diferentes níveis de vitamina C e submetidos à exposição aérea RESUMO Este trabalho avaliou a participação da vitamina C nos indicadoras de estresse no matrinxã (Brycon amazonicus), durante exposição aérea. Novecentos peixes (70,15g) foram distribuídos em caixas de cimento (500 l) e alimentados com os tratamentos: Controle (sem vitamina C); T100 (100 mg); T200 (200 mg); T400 (400 mg); T800 (800 mg de vitamina C kg.ração -1 ). Cada ração foi fornecida a peixes de três caixas por 60 dias antes da aplicação do estressor, que consistiu em suspender os peixes mantendo-os no ar por dois minutos. Cinco, 15, 30 e 60 minutos depois, os peixes anestesiados foram amostrados. Foi coletado sangue para determinação PALAVRAS -CHAVEBrycon amazonicus, captura, estresse, ascorbil polifosfato.

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“…Foram determinadas as exigências nutricionais do tambaqui quanto aos macro e micronutrientes em diferentes fases de vida (MACEDO-VIEGAS et al, 1996;CHAGAS & VAL, 2003); contudo, existem poucas informações sobre sua taxa de alimentação e freqüência de arraçoamento em criação intensiva.…”

Section: Introductionunclassified