Dietary protein requirement of juvenile American eel (Anguilla rostrata) fed practical diets

Tibbetts, Sean M.; Lall, Santosh P.; Anderson, D. M.

doi:10.1016/s0044-8486(99)00363-4

Cited by 75 publications

(70 citation statements)

References 16 publications

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“…Os valores encontrados foram mais altos do que os registrados para o muskellunge (0,47-1,18) e tiger muskellunge (0,90-1,97) (Brecka et al, 1995); sunshine bass (0,88-1,08) (Webster et al, 1995) e enguia americana (0,96-1,20) (Tibbetts et al, 2000). Com relação aos primeiros trabalhos com pirarucus, as TCE foram superiores aos descritos por Alcántara & Guerra (1992) e Moura Carvalho & Nascimento (1992), e parecidas com as descritas por Bard & Imbiriba (1986).…”

Section: Resultsunclassified

Níveis de proteína bruta para juvenis de pirarucu

Ituassú

Filho

Roubach

et al. 2005

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar o efeito de quatro níveis de proteína sobre o crescimento de juvenis de pirarucu, Arapaima gigas. O experimento foi conduzido em delineamento inteiramente casualizado, com de quatro tratamentos (32,7%, 39,3%, 43,4% e 48,6% de proteína bruta), três repetições cada. Foram utilizados 120 peixes, com peso médio inicial de 120,6±3,5 g, distribuídos homogeneamente em 12 tanques-rede de 1 m 3 cada, contendo dez peixes por tanque. Após 45 dias, os resultados indicaram que as dietas com 48,6% de proteína resultaram em melhor ganho de peso, crescimento específico e composição corporal diferenciada. A conversão alimentar e a eficiência da ração não produziram diferenças entre os tratamentos. O nível de proteína na ração que produz máximo crescimento é de 48,6%.Termos para indexação: Arapaima gigas, aqüicultura, nutrição de peixes, dietas práticas, peixes carnívoros. Crude protein levels for juvenile pirarucuAbstract -The objective of this work was to verify the effect of four protein levels on pirarucu, Arapaima gigas, growth performance. One hundred and twenty pirarucu juveniles, with an average weight of 120.6±3.5 g, were stocked into 12 floating cages with 1 m 3 (ten fish per cage), in a complete randomized design with four treatments (32.7%, 39.3%, 43.4% and 48.6% crude protein), in three replicates each. After 45 days, results showed that diet with highest protein level (48.6%) produced a better weight gain, specific growth rate, and differentiated body composition. Feed conversion and protein efficiency ratios did not show any differences among treatments. The dietary protein level required to produce maximum growth is 48.6%.

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Section: Resultsunclassified

Níveis de proteína bruta para juvenis de pirarucu

Ituassú

Filho

Roubach

et al. 2005

Pesq. agropec. bras.

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“…In this study, HSI of barred knifejaw decreases with the protein level increases in all the dietary treatments which may indicate higher utilization of protein levels from the diets which is in agreement with Kim and Lall (2001). Survival rates in the fish fed the 60 % CP diet showed significantly higher mortality than those of the fish fed the 35, 40, 45, and 50 % CP diets possibly due to the production of a high level of nitrogenous wastes by the fish through higher fecal output which pollutes the culture environment (Catacutan and Coloso 1995;Tibbetts et al 2000;Alam et al 2008).…”

Section: Discussionmentioning

confidence: 99%

“…It is well documented that increase of dietary protein can lead to improved fish production especially in the case of carnivorous fish species. However, the excess level of dietary protein will be used for energy and will lead to an increase in ammonia excretion which ultimately deteriorates the fish culture water that may be harmful for fish growth (Catacutan and Coloso 1995;Tibbetts et al 2000). Furthermore, an inadequate level of dietary protein in aqua feeds can result in the stunted growth of fish.…”

Section: Introductionmentioning

confidence: 99%

Re-evaluation of the optimum dietary protein level for maximum growth of juvenile barred knifejaw Oplegnathus fasciatus reared in cages

et al. 2016

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We determined the optimum dietary protein level in juvenile barred knifejaw Oplegnathus fasciatus in cages. Five semi-purified isocaloric diets were formulated with white fish meal and casein-based diets to contain 35, 40, 45, 50, and 60 % crude protein (CP). Fish with an initial body weight of 7.1 ± 0.06 g (mean ± SD) were randomly distributed into 15 net cages (each size: 60 cm × 40 cm × 90 cm, W × L × H) as groups of 20 fish in triplicates. The fish were fed at apparent satiation level twice a day. After 8 weeks of feeding, the weight gain (WG) of fish fed 45, 50, and 60 % CP diets were significantly higher than those of fish fed 35 and 40 % CP diets. However, there were no significant differences in WG among fish fed 45, 50, and 60 % CP diets. Generally, feed efficiency (FE) and specific growth rate (SGR) showed a similar trend as WG. However, the protein efficiency ratio (PER) was inversely related to dietary protein levels. Energy retention efficiency increased with the increase of dietary protein levels by protein sparing from non-protein energy sources. Blood hematocrit content was not affected by dietary protein levels. However, a significantly lower amount of hemoglobin was found in fish fed 35 % CP than in fish fed 40, 45, 50, and 60 % CP diets. Fish fed 60 % CP showed the lowest survival rate than the fish fed 35, 40, 45, and 50 % CP diets. Broken-line analysis of WG showed the optimum dietary protein level was 45.2 % with 18.8 kJ/g diet for juvenile barred knifejaw. This study has potential implication for the successful cage culture of barred knifejaw.

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“…The decrease in weight gain, when the fish were fed excess level of dietary protein may also be because of a reduction in available energy for growth and due to inadequate non-protein energy necessary to deaminate the high protein feed [38,39]. The reduced growth rate and decreased protein utilization beyond requirement of dietary protein level is well documented in the past by several workers [39][40][41][42][43][44][45][46].…”

Section: Discussionmentioning

confidence: 99%

Effects of Dietary Protein Levels on the Growth, Feed Utilization and Haemato-Biochemical Parameters of Freshwater Fish, Cyprinus Carpio Var. Specularis

Ahmed¹,

Maqbool²

2017

Fish Aquac J

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An 8-week feeding trial was conducted to study the effects of dietary protein levels on the growth, feed utilization and haemato-biochemical parameters of mirror carp, Cyprinus carpio specularis (1.50 ± 0.02 g; 4.5 ± 0.05 cm). Six casein-gelatin based isocaloric (367 kcal 100 g -1 , gross energy) diets containing graded levels of dietary protein (25%-50% CP) were formulated. 20 fish were randomly stocked in triplicate groups in 75L circular trough fitted with continuous flow-through system and fed experimental diets at 4% BW/day at 0800 and 1700h. Maximum live weight gain (258%), best feed conversion ratio (FCR) (1.63) and protein efficiency ratio (PER) (1.53) were obtained in fish fed diet containing 40% dietary protein. However, quadratic regression analysis live weight gain, FCR, PER and body protein deposition (BPD) data indicated requirements for dietary protein at 43.5%, 41.6%, 34.7% and 37.3% of dry diet, respectively. Significantly higher whole body protein, low moisture and intermediate body fat contents were recorded at 40% protein containing diet (P<0.05). While minimum ash content was recorded at 25% protein level. The highest HIS value (3.39%) was observed at the lowest protein level. Significant differences were also observed in Hb, HCT and RBC values of different groups fed with varying levels of dietary protein (P<0.05). Whereas, no significant differences were observed in their WBC count except at 25% protein level, where higher WBC count was recorded (P>0.05). Based on the above results, it is recommended that 41.5% protein level would be useful for optimum growth and efficient feed utilization of this fish species.

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Dietary protein requirement of juvenile American eel (Anguilla rostrata) fed practical diets

Cited by 75 publications

References 16 publications

Níveis de proteína bruta para juvenis de pirarucu

Níveis de proteína bruta para juvenis de pirarucu

Re-evaluation of the optimum dietary protein level for maximum growth of juvenile barred knifejaw Oplegnathus fasciatus reared in cages

Effects of Dietary Protein Levels on the Growth, Feed Utilization and Haemato-Biochemical Parameters of Freshwater Fish, Cyprinus Carpio Var. Specularis

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