DOI: 10.1017/S0007114516002105. Published by Cambridge University Press 27 May 2016.
The authors have identified the following errors in the published article:
Tables 3 and 5: The broken line models of pancreatic chymotrypsin, carboxypeptidase a, carboxypeptidase b, and elastase activity (Table 3) as well as apparent faecal digestibility of dry matter, crude protein, total lipids and crude ash (Table 5) were based upon the linear equation: Y=A XB for X≥X B . The variable A XB refers to the Y-Intercept of the respective break-point in response. However, A XB should be indicated as Y B .
Therefore, the correct linear equation is
${ Y\,{\equals}\,Y}_{{ B}} \,{\rm for}\,{ X}\geq { X}_{{B}} {\rm .}$
Table 5: The linear equations for the zinc dose range below or equal to the respective break-point in response are stated in the published article as:
$$\matrix{ \matrix{ {\rm Dry}\,{\rm matter }\quad { Y\,{\equals}\,484{\plus}bX}\,{\rm for}\,{\rm X}\leq {X}_{{ B}} \hfill \cr {\rm Crude}\,{\rm protein}\quad {Y\,{\equals}\,{\minus}35}{ \cdot 4{\plus}bX}\,{\rm for}\,{X}\leq {X}_{{B}} \hfill \cr} \hfill \cr {{\rm Total}\,{\rm lipids}\quad { Y\,{\equals}\,4}{ \cdot22{\plus}bX}\,{\rm for}\,{X}\leq {X}_{{\rm B}} } \hfill \cr {{\rm Crude}\,{\rm ash}\quad {Y\,{\equals}\,212{\plus}bX}\,{\rm for}\,{\rm X}\leq {X}_{{B}} } \hfill \cr } $$
The values used in these equations should have been stated as:
$$\matrix{ \matrix{ {\rm Dry}\,{\rm matter}\quad { Y\,{\equals}\,83}{ \cdot0{\plus}bX}\,{\rm for}\,{X}\leq {X}_{{\rm B}} \hfill \cr {\rm Crude}\,{\rm protein}\quad { Y\,{\equals}\,77}{ \cdot2{\plus}bX}\,{\rm for}\,{X}\leq {X}_{{\rm B}} \hfill \cr} \hfill \cr {{\rm Total}\,{\rm lipids}\quad {Y\,{\equals}\,50}{ \cdot2{\plus}bX}\,{\rm for}\,{X}\leq {X}_{{B}} } \hfill \cr {{\rm Crude}\,{\rm ash}\quad {Y\,{\equals}\,41}{\rm \cdot0{\plus}bX}\,{\rm for}\,{X}\leq {\rm X}_{{\rm B}} } \hfill \cr } $$
The correct values were used to calculate the parameter estimates and the incorrect values reported in the published articles are typographical errors only that do not affect the parameter estimates reported, or the findings and interpretation of the study.
The authors apologise for these errors.
The corrected tables are:
Broken-line regression analysis of analysed pancreatic zinc and pancreatic enzyme activity relative to dietary zinc supply (Parameter estimates with their standard errors)
R 2, coefficient of determination of the respective broken-line regression model; X B , X intercept of the respective break point in parameter response; Y B , Y intercept of the respective break point in parameter response; b 1, slope of the respective broken-line regression curve over dietary Zn doses lesser than or equal to the respective break point in parameter response; b 2, slope of the respective broken-line regression curve over dietary Zn doses greater than or equal to the respective break point in parameter response.
* Pancreatic enzyme activity is expressed as units of activity change/min reaction time normalised to the total protein content within the sample; P values≤0·05 were considered as indicators of statistical significance.
Broken-line regression analysis of apparent faecal DM and crude nutrient digestibility relative to dietary zinc supply (Parameter estimates with their standard errors)
R 2, coefficient of determination of the respective broken-line regression model; X B , X intercept of the respective break point in parameter response; Y B , Y intercept of the respective break point in parameter response; b, slope of the respective broken-line regression curve over dietary Zn doses lesser than or equal to the respective break point in parameter response.
* Coefficients of apparent faecal digestibility are expressed as percentage of feed intake; P values≤0·05 were considered as indicators of statistical significance.
