Partitioning of late gestation energy expenditure in ewes using indirect calorimetry and a linear regression approach
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Partitioning of late gestation energy expenditure in ewes using indirect calorimetry and a linear regression approach. / Kiani, Alishir; Chwalibog, André; Nielsen, Mette O; Tauson, Anne-Helene.
I: Archives of Animal Nutrition, Bind 61, Nr. 3, 2007, s. 168-78.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Partitioning of late gestation energy expenditure in ewes using indirect calorimetry and a linear regression approach
AU - Kiani, Alishir
AU - Chwalibog, André
AU - Nielsen, Mette O
AU - Tauson, Anne-Helene
PY - 2007
Y1 - 2007
N2 - Late gestation energy expenditure (EE(gest)) originates from energy expenditure (EE) of development of conceptus (EE(conceptus)) and EE of homeorhetic adaptation of metabolism (EE(homeorhetic)). Even though EE(gest) is relatively easy to quantify, its partitioning is problematic. In the present study metabolizable energy (ME) intake ranges for twin-bearing ewes were 220-440, 350- 700, 350-900 kJ per metabolic body weight (W0.75) at week seven, five, two pre-partum respectively. Indirect calorimetry and a linear regression approach were used to quantify EE(gest) and then partition to EE(conceptus) and EE(homeorhetic). Energy expenditure of basal metabolism of the non-gravid tissues (EE(bmng)), derived from the intercept of the linear regression equation of retained energy [kJ/W0.75] and ME intake [kJ/W(0.75)], was 298 [kJ/ W0.75]. Values of the intercepts of the regression equations at week seven, five, and two pre-partum were 311, 398, and 451 [kJ/W0.75], respectively. The difference between the intercepts for different weeks was used to calculate EE(homeorhetic). The remaining part of EE(gest) was considered to be EE(conceptus). In conclusion, the good agreement between our values of EE(conceptus) and those in the literature indicates the method's validity.
AB - Late gestation energy expenditure (EE(gest)) originates from energy expenditure (EE) of development of conceptus (EE(conceptus)) and EE of homeorhetic adaptation of metabolism (EE(homeorhetic)). Even though EE(gest) is relatively easy to quantify, its partitioning is problematic. In the present study metabolizable energy (ME) intake ranges for twin-bearing ewes were 220-440, 350- 700, 350-900 kJ per metabolic body weight (W0.75) at week seven, five, two pre-partum respectively. Indirect calorimetry and a linear regression approach were used to quantify EE(gest) and then partition to EE(conceptus) and EE(homeorhetic). Energy expenditure of basal metabolism of the non-gravid tissues (EE(bmng)), derived from the intercept of the linear regression equation of retained energy [kJ/W0.75] and ME intake [kJ/W(0.75)], was 298 [kJ/ W0.75]. Values of the intercepts of the regression equations at week seven, five, and two pre-partum were 311, 398, and 451 [kJ/W0.75], respectively. The difference between the intercepts for different weeks was used to calculate EE(homeorhetic). The remaining part of EE(gest) was considered to be EE(conceptus). In conclusion, the good agreement between our values of EE(conceptus) and those in the literature indicates the method's validity.
KW - Animal Nutritional Physiological Phenomena
KW - Animals
KW - Body Weight
KW - Calorimetry, Indirect
KW - Energy Intake
KW - Energy Metabolism
KW - Female
KW - Fetal Weight
KW - Linear Models
KW - Nutritional Requirements
KW - Pregnancy
KW - Pregnancy, Animal
KW - Sheep
U2 - 10.1080/17450390701297644
DO - 10.1080/17450390701297644
M3 - Journal article
C2 - 17578259
VL - 61
SP - 168
EP - 178
JO - Archives of Animal Nutrition
JF - Archives of Animal Nutrition
SN - 1745-039X
IS - 3
ER -
ID: 8073670