The Linear-Logistic Model: A Novel Paradigm for Estimating Dietary Amino Acid Requirements

Author:

Ramirez-Camba Christian D.12,Levesque Crystal L.2ORCID

Affiliation:

1. Department of Animal Science, University of Minnesota, St. Paul, MN 55108, USA

2. Department of Animal Science, South Dakota State University, Brookings, SD 57007, USA

Abstract

This study aimed to determine whether current methods for estimating AA requirements for animal health and welfare are sufficient. An exploratory data analysis (EDA) was conducted, which involved a review of assumptions underlying AA requirements research, a data mining approach to identify animal responses to dietary AA levels exceeding those for maximum protein retention, and a literature review to assess the physiological relevance of the linear-logistic model developed through the data mining approach. The results showed that AA dietary levels above those for maximum growth resulted in improvements in key physiological responses, and the linear-logistic model depicted the AA level at which growth and protein retention rates were maximized, along with key metabolic functions related to milk yield, litter size, immune response, intestinal permeability, and plasma AA concentrations. The results suggest that current methods based solely on growth and protein retention measurements are insufficient for optimizing key physiological responses associated with health, survival, and reproduction. The linear-logistic model could be used to estimate AA doses that optimize these responses and, potentially, survival rates.

Funder

Food and Agriculture Research—New Investigator Award

USDA National Institute of Food and Agriculture

Publisher

MDPI AG

Subject

General Veterinary,Animal Science and Zoology

Reference92 articles.

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