Details

Autor(en) / Beteiligte

• Ben Ettoumia, R.
• Vernet, J.
• Ortigues-Marty, I.
• Kraiem, K.
• Majdoub-Mathlouthi, L.

Titel

Effects of metabolizable energy intake on post weaning lamb growth performance, carcass tissue composition and internal fat depend on animal characteristics: A meta-analysis

Ist Teil von

• Meat science, 2022-03, Vol.185, p.108719-108719, Article 108719

Ort / Verlag

England: Elsevier Ltd

Erscheinungsjahr

2022

Quelle

MEDLINE

Beschreibungen/Notizen

• This study aimed to establish the quantitative relationship between metabolisable energy intake (MEI) and growth performance, carcass tissue composition and internal fat, taking into consideration animal precocity, maturity and tail nature. Data from 67 publications were used in the meta-analysis. Diets were characterized and three classes were identified (low medium and high energy density diets). Breeds were characterized according to tail nature, precocity and maturity stage. Average daily gain (ADG) responded to MEI in all animals weighing less than 60% of their adult weight regardless their precocity or their tail nature. At the same level of MEI, the higher the diet energy density, the higher the ADG. In animals weighing less than 42% of adult weight and receiving a high starch diet, carcass muscle and internal fat responded to MEI. Whereas, for animals that weighed between 43% and 75% of adult weight, increases in MEI influenced carcass adipose tissue. •Response of ADG and carcass quality to energy intake was quantified by metaanalysis.•Maturity stage affects growth and carcass quality response to energy intake in sheep.•ADG increases with energy intake for sheep weighing less than 60% of adult weight.•Carcass muscle and internal fat increase with energy for weight lower than 42% of adult weight.•Carcass fat increases with energy for weight between 43% and 75% of adult weight.