Modeling chemical and physical body composition of the growing pig
نویسندگان
چکیده
In pig growth models, masses of body lipid (L) and body protein (P) are key state variables that can be related quantitatively to chemical and physical body composition for predicting growth response and carcass characteristics. The main chemical constituents in the empty body weight (EBW) are water (Wa), L, P, and ash. Within pig genotypes, Wa is independent of L and closely related to P (e.g., Wa = a × Pb). The scaling parameter (b) is remarkably constant across pig types, at about 0.855, and represents changes in distribution of P with increasing EBW and differences in Wa-to-P ratios among body pools. The parameter “a” ranges between 4.90 and 5.62 and seems to vary with pig genotype. The ash-to-P ratio, about 0.20, has little significance on estimates of EBW. Gut fill, the difference between live body weight (LBW) and EBW, ranges between 0.03 and 0.10 of LBW; it varies with LBW, feeding level, diet characteristics, and time off-feed. The
منابع مشابه
Some Nutritional Characteristics of Fruit and Oil of Walnut (Juglans regia L.) Growing in Turkey
Walnut (Juglans regia L.) were evaluated for some physical properties and chemical composition. Ripe fruits were determined for moisture (2.71 %), crude protein (14.6 %) crude fibre (1.8%) ash (1.57%), crude energy (576Cal) ether soluble extract (24.71%), nut (10.5g) and kernel (5.09g) veights. Relative density, refractive index...
متن کاملBody mass index and composition in physical preparedness of Iranian military personnel
Purpose: Military personnel are expected to maintain the highest possible level of physical fitness to do their duties. Several factors including body composition and body mass index affect the level of their physical preparedness. The current study was designed to investigate the effect of body composition and body mass index in the level of physical preparedness of Iranian military ...
متن کاملComparison of Body Composition Indices of Chemical Warfare Veterans with Chronic Pulmonary Obstruction in Patients with Low and Moderate to High Disease Severity
Background and Aim: More than 100,000 Iranian veterans suffer from chemical damage caused by mustard gas. The aim of this study was to determine the body composition status of chemical warfare veterans with chronic obstructive pulmonary disease (COPD). Methods: This is a cross-sectional study. 97 chemical warfare veterans with COPD in Karaj, Iran were included in the study. The Patients were di...
متن کاملEffect of a Selected Exercise Program on Physical Literacy and Body Composition of Elementary School Girls with Overweight and Obesity
Background and Objective: Physical literacy refers to onechr('39')s capacity to adopt a healthy and physically active lifestyle. The present study aimed to investigate the effect of a selected exercise program on physical literacy and body composition of overweight and obese elementary school girls. Materials and Methods: This quasi-experimental study was conducted based on a pre-test-post-te...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2004