Journal ArticleDOI
Estimation of Nutrient Requirements from Growth Data
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Two least squares methods of estimating nutrient requirements from growth data were compared and consistently good fits obtained with the nonlinear models suggest that this approach may generally be more useful.Abstract:
Two least squares methods of estimating nutrient requirements from growth data were compared One method involved fitting a broken line by the method of least squares The requirement was taken as the abscissa of the breakpoint in the curve The other method involved fitting an appropriate exponential function to the growth data and estimating the requirement as the abscissa of the point on the fitted curve whose ordinate was 95% of the upper asymptote For the nine sets of data studied, the broken line provided adequate fits for only six The nonlinear models provided adequate fits for all the data studied When both the broken line and the chosen nonlinear model provided adequate fits, the estimated requirements were nearly the same However, the consistently good fits obtained with the nonlinear models suggest that this approach may generally be more usefulread more
Citations
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Book ChapterDOI
Amino acids and proteins
TL;DR: Improved growth and feed efficiency is observed when experimental diets for salmonids were supplemented with indispensable amino acids to simulate levels found in isolated fish protein or the respective eggs and whole-body tissue of the species being studied.
Journal ArticleDOI
Meta-analysis of nitrogen balance studies for estimating protein requirements in healthy adults
TL;DR: This meta-analysis provides new recommendations for dietary reference values, ie, an EAR (median) and RDA (97.5th percentile) for healthy adults of 105 and 132 mg N x kg (-1) x d(-1) (0.65 and 0.83 g good-quality protein x kg(-1), respectively.
Journal ArticleDOI
Problems and pitfalls in animal experiments designed to establish dietary requirements for essential nutrients.
TL;DR: Having considered these factors, the data obtained must be subjected to appropriate statistical methods that will allow objective rather than subjective estimation of the maxima or minima being sought (i.e., the "requirement").
Journal ArticleDOI
Total sulfur amino acid requirement of juvenile red drum, Sciaenops ocellatus
Hae Young Moon,Delbert M. Gatlin +1 more
TL;DR: Two experiments were conducted in a brackish water recirculating system to quantify the total sulfur amino acid requirement of juvenile red drum and the replacement value of cystine for methionine and to assist in formulating diets to satisfy the sulfur amino acids requirement of red drum.
Journal ArticleDOI
Experimental design, statistical analysis and modelling of dietary nutrient requirement studies for fish: a critical review
TL;DR: A limited survey of published reports on dietary nutrient requirement estimates for fish indicates that broken-line analysis and analysis of variance (ANOVA) are often used to estimate nutrient requirements from dose‐response data.
References
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Book
Applied Regression Analysis
Norman R. Draper,Harry Smith +1 more
TL;DR: In this article, the Straight Line Case is used to fit a straight line by least squares, and the Durbin-Watson Test is used for checking the straight line fit.
Journal ArticleDOI
Potassium Requirement of the Growing Rat
TL;DR: On the basis of maximum weight gain in weanling male rats fed a semipurified diet for 21 days, the requirement for potassium was found to be 0.23% of the diet, compared with the NRC requirement of 0.18%.
Journal ArticleDOI
Histidine Status in the Chick as Measured by Growth Rate, Plasma Free Histidine and Breast Muscle Carnosine
Journal ArticleDOI
New methods for comparing the biological efficiency of alternate nutrient sources.
TL;DR: New methods for the determination of biological efficiency (the ability of a nutrient to produce a response) and for comparison of the efficiencies of alternate nutrient sources are proposed based on a four-parameter kinetic model.
Journal ArticleDOI
Dietary niacin requirements for channel catfish.
James W. Andrews,Takeshi Murai +1 more
TL;DR: Channel catfish fingerlings were fed purified diets containing six levels of supplemental niacin and no histological abnormalities were observed in the heart, hepatopancreas, kidney, lateral muscle, gastrointestinal tract and gill tissues of deficient fish.