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Degree of saturation and free fatty acid content of fats determine dietary preferences in laying hens
- Source :
- CEU Repositorio Institucional, Fundación Universitaria San Pablo CEU (FUSPCEU), Dipòsit Digital de Documents de la UAB, Universitat Autònoma de Barcelona, Animals, Volume 10, Issue 12, Animals, Vol 10, Iss 2437, p 2437 (2020), Animals : an Open Access Journal from MDPI, Recercat. Dipósit de la Recerca de Catalunya, instname, Recercat: Dipósit de la Recerca de Catalunya, Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
- Publication Year :
- 2020
- Publisher :
- MDPI, 2020.
-
Abstract
- Behavioural and genetic evidence shows that the taste system is intimately related to the sensing of nutrients with consequences for poultry nutrition practices. A better understanding of how chickens may sense fat could provide the background for selecting feedstuffs used in poultry feeds. Acid oils have the potential to be economical and sustainable feedstuffs. These fat by-products from the edible oil refining industry possess a similar fatty acid composition to the crude oils but are richer in free fatty acids (FFA). An experiment was conducted to study the effect of FFA content and the unsaturated:saturated ratio (U:S) on dietary preferences in hens. Four fat sources were added to a basal diet at an inclusion rate of 6%, determining the experimental diets: soybean oil (SO<br />high U:S, 5% FFA)<br />soybean acid oil (SA<br />high U:S, 50% FFA)<br />palm oil (PO<br />low U:S, 5% FFA)<br />and palm fatty acid distillate (PFAD<br />low U:S, 50% FFA). The experimental diets were offered in a series of double-choice tests to forty-eight Lohmann Brown laying hens housed individually in cages. Each hen was offered the ten potential binary combinations of the four diets including each diet compared to itself (referred to as four control double-choices). Feed intake was measured for two hours twice a day after one hour of fasting. Consumption was analysed as a standard preference index (% of test diet intake in comparison with the total intake). Preference values were compared to the random choice value of 50% using the Student&rsquo<br />s t-test. None of the four control comparisons differ significantly from 50% (p &gt<br />0.05), indicating that the changes in preference values observed in the other binary comparisons were related to the dietary changes associated to fat ingredients. Hens showed a feed preference for palm oil added diets over soybean oil diets (p &lt<br />0.05), with PO and PFAD being equally preferred (p &lt<br />0.05). However, in this trial the hens demonstrated a preference for SO (low %FFA) when offered in choice with SA (high %FFA) (p &lt<br />0.05). These results suggest that the degree of saturation plays an important role in dietary fat preferences: hens prefer predominantly saturated oils even when these are rich in FFA. Furthermore, when presented with a choice between predominantly unsaturated oils, hens prefer feed with a low %FFA. In conclusion, %FFA and the U:S ratio affected feed preferences in hens. The use of oils with greater preference values may give rise to greater feed palatability, enhancing feed intake at critical stages.
- Subjects :
- Taste
soybean oil
fat source
laying hen
Soybean oil
Nutrient
lcsh:Zoology
double-choice
Palatability
lcsh:QL1-991
preference
chemistry.chemical_classification
Gallinas ponedoras - Alimentación
0303 health sciences
palm oil
lcsh:Veterinary medicine
04 agricultural and veterinary sciences
Palm oil
Random choice
Alimentos para animales
Fat source
Feeds - Composition
Pollastres -- Nutrició
Fatty acid composition
Hens - Feeding and feeds
Aceite de palma
food.ingredient
Aceite de soja
Article
Preference
03 medical and health sciences
Animal science
food
Double-choice
Laying hen
030304 developmental biology
General Veterinary
0402 animal and dairy science
Fatty acid
Piensos compuestos
040201 dairy & animal science
chemistry
palatability
Palma oil
lcsh:SF600-1100
Animal feeds
Animal Science and Zoology
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- CEU Repositorio Institucional, Fundación Universitaria San Pablo CEU (FUSPCEU), Dipòsit Digital de Documents de la UAB, Universitat Autònoma de Barcelona, Animals, Volume 10, Issue 12, Animals, Vol 10, Iss 2437, p 2437 (2020), Animals : an Open Access Journal from MDPI, Recercat. Dipósit de la Recerca de Catalunya, instname, Recercat: Dipósit de la Recerca de Catalunya, Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
- Accession number :
- edsair.doi.dedup.....20eee27fbafb1689929273906590b83f