Biomaterial Database

Influence of age on utilization of supplemental fats by young turkeys. 1986

J L Sell, and A Krogdahl, and N Hanyu

Male poults were fed diets containing 0, 4, 8, or 12% tallow or 4, 8, or 12% animal-vegetable fat blend (A-V Fat) from 1 day to 8 weeks of age. Supplemental fat improved 8-week body weight and feed efficiency, irrespective of fat source. Fat retention (fat consumed-fat excreted) was not affected by fat level or by fat source after 2 weeks of age. At 2 weeks, fat retention by poults fed tallow was less than that of poults fed A-V Fat. Fat retention increased with age, irrespective of fat source or level. Fat retentions ranged from 66.4 to 83.7 at 2 weeks and from 90.8 to 96.5 at 8 weeks of age. Changes in metabolizable energy (ME) values of the fats with age paralleled those of fat retention, whether ME were estimated by multiplying fat retention percentages times gross energy of the fats or by regression analysis of changes in diet ME associated with increments of fats. On the basis of changes in diet ME, the ME of tallow was 6808 kcal/kg at 2 weeks and 8551 kcal/kg at 8 weeks. Analagous values for A-V Fat were 7114 and 8924 kcal/kg, respectively. Fatty acid analysis of dietary and excreta fat indicated that, as turkeys aged, improvements in retention were greatest for palmitic and stearic acids, especially in the instance of tallow. Fatty acid binding protein (FABP) assay of intestines from poults fed no added fat, 12% tallow, or 12% A-V Fat showed that fat level did not significantly affect FABP activity. There was, however, a marked increase in intestinal FABP in 6- and 8-week-old poults as compared with 2- or 4-week-old poults.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D001835	Body Weight	The mass or quantity of heaviness of an individual. It is expressed by units of pounds or kilograms.	Body Weights,Weight, Body,Weights, Body
D004041	Dietary Fats	Fats present in food, especially in animal products such as meat, meat products, butter, ghee. They are present in lower amounts in nuts, seeds, and avocados.	Fats, Dietary,Dietary Fat,Fat, Dietary
D004734	Energy Metabolism	The chemical reactions involved in the production and utilization of various forms of energy in cells.	Bioenergetics,Energy Expenditure,Bioenergetic,Energy Expenditures,Energy Metabolisms,Expenditure, Energy,Expenditures, Energy,Metabolism, Energy,Metabolisms, Energy
D005227	Fatty Acids	Organic, monobasic acids derived from hydrocarbons by the equivalent of oxidation of a methyl group to an alcohol, aldehyde, and then acid. Fatty acids are saturated and unsaturated (FATTY ACIDS, UNSATURATED). (Grant & Hackh's Chemical Dictionary, 5th ed)	Aliphatic Acid,Esterified Fatty Acid,Fatty Acid,Fatty Acids, Esterified,Fatty Acids, Saturated,Saturated Fatty Acid,Aliphatic Acids,Acid, Aliphatic,Acid, Esterified Fatty,Acid, Saturated Fatty,Esterified Fatty Acids,Fatty Acid, Esterified,Fatty Acid, Saturated,Saturated Fatty Acids
D000367	Age Factors	Age as a constituent element or influence contributing to the production of a result. It may be applicable to the cause or the effect of a circumstance. It is used with human or animal concepts but should be differentiated from AGING, a physiological process, and TIME FACTORS which refers only to the passage of time.	Age Reporting,Age Factor,Factor, Age,Factors, Age
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D014422	Turkeys	Large woodland game BIRDS in the subfamily Meleagridinae, family Phasianidae, order GALLIFORMES. Formerly they were considered a distinct family, Melegrididae.	Meleagridinae,Meleagrididae