Velocidade crítica de natação (Ucrit) de matrinxã (Brycon amazonicus) após exposição à hipoxia

Ferreira, M. S.; Oliveira, Alzira Miranda de; Val, Adalberto Luı́s

doi:10.1590/s0044-59672010000400009

Cited by 9 publications

(8 citation statements)

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“…As well as in previous analysis (Ferreira, 2006, Ferreira et al 2010, in the present experiment, the swimming performance (Ucrit) of matrinchã was higher than of the tambaqui.…”

Section: Does Tambaqui Accumulate Lactate Faster Than Matrinchã Durinsupporting

confidence: 91%

“…Manuscript to be reviewed red and white muscle along with the longitudinal axis, they look like similar (personal observation). However, our previous study (Ferreira et al, 2010) have indicated a high swimming performance of matrinchã (Ucrit; Brett 1964) compared to tambaqui. The Ucrit test (Brett, 1964), an incremental velocity procedure, is mainly a measure of aerobic capacity of a fish, but with a high participation of anaerobic metabolism close to velocity of fatigue (Hammer, 1995;Burgetz et al, 1998;Richards et al, 2002;Peak & Farrel, 2004).…”

Section: Introductionmentioning

confidence: 85%

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Peer Review #2 of "Could resistance to lactate accumulation contribute to the better swimming performance of Brycon amazonicus when compared to Colossoma macropomum? (v0.1)"

2018

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Background. In the wild, matrinchã (Brycon amazonicus) and tambaqui (Colossoma macropomum) rely strongly on their swimming capacity to perform feeding, migration and reproductive activities. Sustained swimming speed in fishes is performed almost exclusively by aerobic red muscles. The white muscle has high contraction power, but fatigue quickly, being used mainly in sprints and bursts, with a maximum duration of few seconds. The Ucrit test, an incremental velocity procedure, is mainly a measure of the aerobic capacity of a fish, but with a high participation of anaerobic metabolism close to the velocity of fatigue. Our previous study has indicated a high swimming performance of matrinchã (Ucrit) after hypoxia exposure, despite increased levels of lactate in plasma. In contrast, tambaqui with high lactate levels in plasma presented very low swimming performance. Therefore, we aimed to study the resistance of matrinchã and tambaqui to the increased lactate levels in muscle over an incremental velocity test (Ucrit). As a secondary aim, we analyzed the differences in anaerobic metabolism in response to environmental hypoxia, which could also support the better swimming performance of matrinchã, compared to tambaqui. Methods. We measured, over incremented velocities in both species, the metabolic rate (the oxygen consumption by the fish; MO 2), and the concentrations of lactate and nitrites and nitrates (NOx) in muscles. NOx was measured as an indicator of nitric oxide and its possible role in improving cardiorespiratory capacity in these fishes, which could postpone the use of anaerobic metabolism and lactate production during the swimming test. Also, we submitted fishes until fatigue and hypoxia (0.5 mg L-1) and measured, in addition to the previous parameters, lactate dehydrogenase activity (LDH; the enzyme responsible for lactate production), since that swimming performance could also be explained by the anaerobic capacity of producing ATP. Results. Matrinchã exhibited a better swimming performance and higher oxygen consumption rates. Lactate levels were higher in matrinchã only at the moment of fatigue. Under hypoxia, LDH activity increased in the white muscle only in tambaqui, but averages were always higher in matrinchã. Discussion and conclusions. The results suggest that matrinchã is more resistant than tambaqui regarding lactate accumulation in muscle at the Ucrit test, but it is not clear how much it contributes to postpone fatigue. The higher metabolic rate possibly allows the accumulated lactate to be used as aerobic fuel by the matrinchã, improving swimming performance. More studies are needed regarding matrinchã's ability to oxidize lactate, the effects of exercise on muscle acidification, and the hydrodynamics of these species, to clarify why matrinchã is a better swimmer than tambaqui.

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“…As well as in previous analysis (Ferreira, 2006, Ferreira et al 2010, in the present experiment, the swimming performance (Ucrit) of matrinchã was higher than of the tambaqui.…”

Section: Does Tambaqui Accumulate Lactate Faster Than Matrinchã Durinsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 85%

Peer Review #2 of "Could resistance to lactate accumulation contribute to the better swimming performance of Brycon amazonicus when compared to Colossoma macropomum? (v0.1)"

2018

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“…Lactate levels in white muscle were similar in both species after hypoxia, but only in 285 tambaqui were higher than control (P<0.05, Table 2). In red muscle, hypoxia did not cause an 286 increase in lactate levels, though levels were always higher in matrinchã than in tambaqui 287 (P<0.05, As well as in previous analysis (Ferreira, 2006, Ferreira et al 2010, in the present 294 experiment, the swimming performance (Ucrit) of matrinchã was higher than of the tambaqui.…”

supporting

confidence: 76%

Peer Review #3 of "Could resistance to lactate accumulation contribute to the better swimming performance of Brycon amazonicus when compared to Colossoma macropomum? (v0.1)"

2018

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Background. In the wild, matrinchã (Brycon amazonicus) and tambaqui (Colossoma macropomum) rely strongly on their swimming capacity to perform feeding, migration and reproductive activities. Sustained swimming speed in fishes is performed almost exclusively by aerobic red muscles. The white muscle has high contraction power, but fatigue quickly, being used mainly in sprints and bursts, with a maximum duration of few seconds. The Ucrit test, an incremental velocity procedure, is mainly a measure of the aerobic capacity of a fish, but with a high participation of anaerobic metabolism close to the velocity of fatigue. Our previous study has indicated a high swimming performance of matrinchã (Ucrit) after hypoxia exposure, despite increased levels of lactate in plasma. In contrast, tambaqui with high lactate levels in plasma presented very low swimming performance. Therefore, we aimed to study the resistance of matrinchã and tambaqui to the increased lactate levels in muscle over an incremental velocity test (Ucrit). As a secondary aim, we analyzed the differences in anaerobic metabolism in response to environmental hypoxia, which could also support the better swimming performance of matrinchã, compared to tambaqui.Methods. We measured, over incremented velocities in both species, the metabolic rate (the oxygen consumption by the fish; MO 2 ), and the concentrations of lactate and nitrites and nitrates (NOx) in muscles. NOx was measured as an indicator of nitric oxide and its possible role in improving cardiorespiratory capacity in these fishes, which could postpone the use of anaerobic metabolism and lactate production during the swimming test. Also, we submitted fishes until fatigue and hypoxia (0.5 mg L -1 ) and measured, in addition to the previous parameters, lactate dehydrogenase activity (LDH; the enzyme responsible for lactate production), since that swimming performance could also be explained by the anaerobic capacity of producing ATP.Results. Matrinchã exhibited a better swimming performance and higher oxygen consumption rates. Lactate levels were higher in matrinchã only at the moment of fatigue. Under hypoxia, LDH activity increased in the white muscle only in tambaqui, but averages were always higher in matrinchã. Discussion and conclusions.The results suggest that matrinchã is more resistant than tambaqui regarding lactate accumulation in muscle at the Ucrit test, but it is not clear how much it contributes to postpone fatigue. The higher metabolic rate possibly allows the accumulated lactate to be used as aerobic fuel by the matrinchã, improving swimming performance. More studies are needed regarding matrinchã's ability to oxidize lactate, the effects of exercise on muscle acidification, and the hydrodynamics of these species, to clarify why matrinchã is a better swimmer than tambaqui. PeerJ reviewing PDF | Manuscript to be reviewed 1 Could resistance to lactate accumulation contribute to the better swimming 2 performance of Brycon amazonicus when compared to Colossoma Manuscript to be reviewed 33 34 ...

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“…O lactato é gerado pela fermentação anaeróbica da glicose quando o oxigênio não supre a demanda metabólica do organismo (Hochachka e Lutz 2001) e tem sido utilizado como um bom indicador do estado de estresse dos peixes (Wedemeyer 1990). Mesmo com lactato acumulado, os grupos expostos à hipóxia mantiveram a Ucrit (Tabela 1), corroborando o trabalho anterior com essa espécie, no qual se concluiu por sua sensibilidade à hipóxia, porém sem efeito do acúmulo de lactato em seu desempenho natatório (Ucrit) (Ferreira et al 2010). Embora a capacidade natatória possa ser usada para algumas espécies como indicadora de estresse hipóxico (Wedmeyer 1990), inclusive para Colossoma macropomum (Ferreira 2006), não parece ser o caso para o matrinchã.…”

Section: Discussionunclassified

Efeito da quantidade de proteína na dieta e treinamento físico sobre parâmetros fisiológicos e zootécnicos de matrinchã (Brycon amazonicus, Günther 1869)

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Efeito da quantidade de proteína na dieta e treinamento físico sobre parâmetros fisiológicos e zootécnicos de matrinchã (Brycon amazonicus, Günther 1869)Márcio Soares FERREIRA1, Paulo Henrique Rocha ARIDE2, Maria de Nazaré Paula da SILVA3, Adalberto Luis VAL4 RESUMO O objetivo do presente estudo foi avaliar a interação entre os efeitos do treinamento físico e da quantidade de proteína na dieta sobre a hematologia; a composição corpórea de proteínas, lipídeos e cinzas; o consumo alimentar, o ganho de massa e fator de conversão; o desempenho natatório e a resistência ao estresse causado pela hipóxia em exemplares de matrinchã. Os resultados indicam que a hematologia e o desempenho natatório não são alterados pelo treinamento físico ou pela concentração de proteína na dieta, porém, a resistência à hipóxia é aumentada pelo treinamento, como indicado por menores elevações dos níveis de glicose. O aumento da quantidade de proteína na dieta e o treinamento melhoram a conversão alimentar e o ganho de massa dos animais, enquanto que o aumento na ingestão de ração é causado apenas pelo treinamento. A aplicação concomitante dos dois fatores, embora cause efeito aditivo nos índices de ganho de massa e conversão alimentar, gera também os maiores acúmulos de gorduras no filé, o que sugere uma avaliação do tipo de gordura acumulada e da aceitação desta carne no mercado. PALAVRAS-CHAVE: exercício físico, ganho de massa, hematologia, resistência à hipóxia Dietary protein and exercise training effects on the physiological and zootechnical parameters of matrinchã (Brycon amazonicus, Günther 1869) ABSTRACTThe aim of this study was to evaluate the combined effects of physical training and the dietary protein level on the hematological parameters, body proteins, lipids and ash content, food intake, conversion efficiency and growth ratio together with the swimming performance and the resistance to hypoxic stress in specimens of matrinchã. The results indicate that the swimming performance and hematology are not altered by physical training or by the diet protein content; moreover, the resistance to hypoxia is increased by the exercise, as indicated by the lower levels of plasma glucose. Increased amount of protein in the diet and training improve feed conversion and mass gain in the animals, while enhanced food intake is related to training. The simultaneous application of those two factors causes a combined and improved effect on the mass gain and the conversion rates. Due to higher fat accumulation in the fillet, future assessment of stored fat type is suggested, as well as evaluation of market acceptance of the fish product. KEYWORDS: physical exercise, mass gain, hematology, resistance to hypoxia Efeito da quantidade de proteína na dieta e treinamento físico sobre parâmetros fisiológicos e zootécnicos de matrinchã (Brycon amazonicus, Günther 1869)

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Velocidade crítica de natação (Ucrit) de matrinxã (Brycon amazonicus) após exposição à hipoxia

Cited by 9 publications

References 8 publications

Peer Review #2 of "Could resistance to lactate accumulation contribute to the better swimming performance of Brycon amazonicus when compared to Colossoma macropomum? (v0.1)"

Peer Review #2 of "Could resistance to lactate accumulation contribute to the better swimming performance of Brycon amazonicus when compared to Colossoma macropomum? (v0.1)"

Peer Review #3 of "Could resistance to lactate accumulation contribute to the better swimming performance of Brycon amazonicus when compared to Colossoma macropomum? (v0.1)"

Efeito da quantidade de proteína na dieta e treinamento físico sobre parâmetros fisiológicos e zootécnicos de matrinchã (Brycon amazonicus, Günther 1869)

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