PMID- 7705475
OWN - NLM
STAT- MEDLINE
DCOM- 19950505
LR  - 20190606
IS  - 1341-1357 (Print)
IS  - 0007-5124 (Linking)
VI  - 44
IP  - 1
DP  - 1995 Jan
TI  - Characteristic relation between dietary metabolizable energy content and 
      digestible energy content in laboratory cats.
PG  - 23-8
AB  - This study was conducted to examine the relationship between dietary nitrogen 
      (N)-corrected metabolizable energy (MEn) and dietary digestible energy (DE) in 
      cats, in order to verify the reliability of the present metabolizable energy (ME) 
      system for cats. Four adult female cats were fed diets containing four different 
      levels of crude protein (CP) (24, 35, 49, and 62% as fed) 4 hours a day in 4 x 4 
      Latin square design to determine energy- and N-balance. Dietary CP levels had 
      hardly any effect on daily food intake, but acid-ether extract (AEE) intake 
      tended to increase and carbohydrate (CHO) intake tended to decrease, in response 
      to increases in dietary CP levels. Apparent CP and AEE digestibility did not 
      change, regardless of the experimental diet. In contrast, CHO digestibility 
      tended to diminish as dietary CP levels increased. Although the ratio of urinary 
      energy (UE) to urinary N (UN) was higher in cats fed the lowest CP diet, it was 
      still much lower than in other mammals. Regression between UE/digestible crude 
      protein (DCP) and N-balance indicated that dietary ME at N-equilibrium (i.e., 
      MEn) could be expressed as DE -0.47 x DCP. MEn could also be estimated as DE 
      -0.62 x DCP by using the average ratio of UE/(UN x 6.25). Both DCP coefficients 
      were much lower than in other mammals, including dogs and pigs, suggesting a 
      unique form of N metabolism in cats. Because ME values applied to practical 
      feline feed ingredients have been either estimated in pigs or calculated 
      according to the equation, DE -1.25 x DCP, similar to the method used for dogs, 
      the present ME values for cats are believed to have been underestimated.
FAU - Hashimoto, M
AU  - Hashimoto M
AD  - Research Center, Nihon Nosan Kogyo K.K., Ibaraki, Japan.
FAU - Funaba, M
AU  - Funaba M
FAU - Ohshima, S
AU  - Ohshima S
FAU - Abe, M
AU  - Abe M
LA  - eng
PT  - Journal Article
PL  - Japan
TA  - Exp Anim
JT  - Experimental animals
JID - 9604830
RN  - 0 (Dietary Carbohydrates)
RN  - 0 (Dietary Proteins)
RN  - N762921K75 (Nitrogen)
SB  - IM
MH  - Animals
MH  - Cats/*metabolism
MH  - *Diet
MH  - Dietary Carbohydrates/administration & dosage
MH  - Dietary Proteins/administration & dosage/metabolism
MH  - *Digestion
MH  - *Energy Intake
MH  - Female
MH  - Nitrogen/metabolism/urine
EDAT- 1995/01/01 00:00
MHDA- 1995/01/01 00:01
CRDT- 1995/01/01 00:00
PHST- 1995/01/01 00:00 [pubmed]
PHST- 1995/01/01 00:01 [medline]
PHST- 1995/01/01 00:00 [entrez]
AID - 10.1538/expanim.44.23 [doi]
PST - ppublish
SO  - Exp Anim. 1995 Jan;44(1):23-8. doi: 10.1538/expanim.44.23.