Quantitative methionine requirement of juvenile sea-bass (Dicentrarchus labrax)

Thébault, H.; Alliot, Elisabeth; Pastoureaud, Annie

doi:10.1016/0044-8486(85)90154-1

Cited by 57 publications

(33 citation statements)

References 19 publications

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“…[3] Showed that, this was also true for carp. Generally, the requirements based on the two tissues were close agreement with main exception low methionine requirement is predicted from muscle tissue analysis [33]. Table 4 shows the results of experiments, where the method of [14] equating the deposition rate of each of IAA with requirement was used.…”

Section: Resultsmentioning

confidence: 89%

Amino Acid Requirements of Gilthead Bream (Sparus aurata) Juveniles

Gaber¹,

Salem²,

Zaki³

et al. 2016

WJET

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Section: Resultsmentioning

confidence: 89%

Amino Acid Requirements of Gilthead Bream (Sparus aurata) Juveniles

Gaber¹,

Salem²,

Zaki³

et al. 2016

WJET

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“…The pattern of postprandial or absorptive plasma free amino acid concentrations of fish fed graded levels of the amino acid tested has been used in several studies in an attempt to confirm requirement values assessed by growth (Wilson et al 1980;Thebault et al 1985;Tibaldi and Tulli 1999). The plasma limiting amino acid concentration is expected to be low in fish given sub-requirement levels of the test amino acid, however when adequate levels are fed the plasma concentration tends to increase linearly as the dietary concentrations rise (Cowey 1995).…”

Section: Discussionmentioning

confidence: 99%

“…PFAA of fish fed graded levels of the amino acid tested has been used in several experiments in an attempt to confirm requirement values assessed by growth. Although the effects of dietary protein or amino acid mixtures on PFAA concentrations in rainbow trout, O. mykiss (Murai et al 1987;Schuhmacher et al 1997;Vermeirssen et al 1997), and sea bass, Dicentrarchus labrax (Thebault et al 1985), have been reported, the complete dose response relationships for amino acids have not been investigated. In our previous studies, requirements for dietary essential amino acids such as arginine, methionine, lysine and threonine were obtained in rainbow trout, O. mykiss, by using surgically modified methods in our laboratory (Ok et al 2001;Ok 2002;Park et al 2005).…”

Section: Introductionmentioning

confidence: 99%

The dietary valine requirement for rainbow trout,Oncorhynchus mykiss, can be estimated by plasma free valine and ammonia concentrations after dorsal aorta cannulation

Bae

Park

Yun

et al. 2012

Journal of Applied Animal Research

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This study was carried out to evaluate the dietary valine requirement by measuring means of the plasma free valine and ammonia concentrations in rainbow trout, Oncorhynchus mykiss, after dorsal aorta cannulation. A total of 35 fish averaging 49897.2 g (initial body weight, mean9SD) were randomly distributed into seven groups with five fish in each group. After 48 h of feed deprivation, each group was fed one of seven L-amino acid based diets containing graded levels of valine (0.45, 0.95, 1.20, 1.45, 1.70, 1.95 or 2.45% of diet, dry matter basis) by intubation at 1% body weight. Blood samples were taken at 0, 5 and 24 h after intubation. Post-prandial plasma free valine concentrations (PPval, 5 h after intubation) and post-absorptive free valine concentrations (PAval, 24 h after intubation) of fish fed diets containing 1.45% or more valine were significantly higher than those of fish fed diets containing 1.20% or less valine (PB0.05). Post-prandial plasma ammonia concentrations (PPA, 5 h after intubation) remained low or constant from fish fed diets containing 0.45Á1.45% valine, but increased linearly from fish fed diets containing 1.45Á2.45% valine. Post-absorptive plasma ammonia concentrations in the present study were not significantly different among the groups. Broken-line model analyses on PPval, PAval and PPA indicated that the dietary valine requirements of rainbow trout was between 1.41 (3.85) and 1.50% (4.10) of diet (% of dietary protein on a dry matter basis).

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“…The data regarding these needs dealt mainly with their requirement for sulfur containing amino acids (Thebault et al 1985;Hidalgo et al 1987) and lysine (Tibaldi and Lanari 1991). Availability of amino acids depends not only on the feed composition but also to a large extend on its digestibility and the proteolytic capacity of the digesting organism.…”

Section: Introductionmentioning

confidence: 99%

Proteolysis by juvenile sea bass (Dicentrarchus labrax) gastrointestinal enzymes as a method for the evaluation of feed proteins

Lindner

Eshell

Kolkovski

et al. 1995

Fish Physiol Biochem

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Protein digestibility by gastrointestinal homogenates of Dicentrarchus labrax, was investigated in 5 feeds in relation to their amino acids composition and their ability to sustain growth of D. labrax post larval juveniles. Gastric proteolysis was found to contribute <25% of the total proteolytic capacity. Correlation was found between intestinal proteolytic capacity and the feed protein content of three pairs of amino acids. The sum of basic amino acids, arginine + lysine in the feed protein exhibited a positive correlation with susceptibility to proteolysis. The sum of the acid amino acids glycine and proline showed a negative correlation.Comparison of the intestinal proteolytic enzymatic activities in 3 growth stages of this species revealed similar profiles. Post larval and large juveniles had similar proteolytic capacities when compared on the basis of equal activity on an artificial substrate of Trypsin. Specific growth rates of post larval fish fed on these 5 feeds correlated positively with their protein digestibility as measured with large juvenile's intestinal homogenates. The results suggest that in this species, the efficiency of feeds in sustaining growth at the post larval stage can be estimated by measuring the feed protein digestibility by the proteolytic system of larger sized juveniles.

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Quantitative methionine requirement of juvenile sea-bass (Dicentrarchus labrax)

Cited by 57 publications

References 19 publications

Amino Acid Requirements of Gilthead Bream (Sparus aurata) Juveniles

Amino Acid Requirements of Gilthead Bream (Sparus aurata) Juveniles

The dietary valine requirement for rainbow trout,Oncorhynchus mykiss, can be estimated by plasma free valine and ammonia concentrations after dorsal aorta cannulation

Proteolysis by juvenile sea bass (Dicentrarchus labrax) gastrointestinal enzymes as a method for the evaluation of feed proteins

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