Determination of endogenous fat loss and true total tract digestibility of fat in mink (Neovison vison).

Autor: Marx FR; a Department of Animal Science , Federal University of Rio Grande do Sul - UFRGS , Porto Alegre , Brazil., Ahlstrøm Ø; b Department of Animal and Aquacultural Sciences, Faculty of Biosciences , Norwegian University of Life Sciences , Ås , Norway., Trevizan L; a Department of Animal Science , Federal University of Rio Grande do Sul - UFRGS , Porto Alegre , Brazil., Kessler AM; a Department of Animal Science , Federal University of Rio Grande do Sul - UFRGS , Porto Alegre , Brazil.
Jazyk: angličtina
Zdroj: Archives of animal nutrition [Arch Anim Nutr] 2019 Feb; Vol. 73 (1), pp. 67-73. Date of Electronic Publication: 2018 Nov 21.
DOI: 10.1080/1745039X.2018.1545501
Abstrakt: The objective of this study was to determine the endogenous fat loss (EFL) and to calculate true total tract digestibility (TTTD) of fat in mink (Neovison vison) using soybean oil-based diets with different fat levels. In the digestibility assay, four diets with 6.30%, 13.9%, 22.0% and 34.0% fat in dry matter were used. Sixteen adult male mink were distributed in a complete randomised design. The apparent total tract digestibility (ATTD) of dietary fat was 90.8%, 95.9%, 96.9% and 97.8%, respectively. The apparent total digestible fat was linearly related to dietary fat intake (r 2  = 0.99). The EFL was estimated from the slope of the regression equation and was determined to be 5.09 g/kg DM intake. The TTTD of soybean oil was determined to be 99.3%. Therefore, TTTD values will have negligible impact in feed formulation as they are close to ATTD values with the dietary fat levels normally used for mink.
Databáze: MEDLINE
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