scholarly journals Influence of Quaternary Benzophenantridine and Protopine Alkaloids on Growth Performance, Dietary Energy, Carcass Traits, Visceral Mass, and Rumen Health in Finishing Ewes under Conditions of Severe Temperature-humidity Index

2015 ◽  
Vol 29 (5) ◽  
pp. 652-658 ◽  
Author(s):  
A. Estrada-Angulo ◽  
A. Aguilar-Hernández ◽  
M. Osuna-Pérez ◽  
V. H. Núñez-Benítez ◽  
B. I. Castro-Pérez ◽  
...  
Keyword(s):  
Growth Performance ◽  
Carcass Traits ◽  
Dietary Energy ◽  
Visceral Mass ◽  
Temperature Humidity Index ◽  
Humidity Index

scholarly journals Effects of dietary energy and protein content and lipid source on growth performance and carcass traits in Pekin ducks

2019 ◽  
Vol 98 (10) ◽  
pp. 4829-4837 ◽  
Author(s):  
J.B. Liu ◽  
H.L. Yan ◽  
Y Zhang ◽  
Y.D. Hu ◽  
H.F. Zhang
Keyword(s):  
Growth Performance ◽  
Protein Content ◽  
Carcass Traits ◽  
Dietary Energy ◽  
Pekin Ducks ◽  
Lipid Source

The influence of heat load on Merino sheep. 1. Growth, performance, behaviour and climate

2020 ◽  
Vol 60 (16) ◽  
pp. 1925
Author(s):  
A. M. Lees ◽  
M. L. Sullivan ◽  
J. C. W. Olm ◽  
A. J. Cawdell-Smith ◽  
J. B. Gaughan
Keyword(s):  
Middle East ◽  
Growth Performance ◽  
Water Intake ◽  
Feed Intake ◽  
Heat Load ◽  
Climatic Conditions ◽  
Temperature Humidity Index ◽  
Humidity Index ◽  
Dressing Percentage ◽  
Live Export

Context Annually, millions of sheep are exported from Australia to the Middle East, typically during the southern hemisphere winter to the northern hemisphere summer. During these voyages, sheep can be exposed to relatively rapid changes in ambient conditions within a short period of time (≤29 days); therefore, excessive heat load concerns can arise. Aims The aim of this study was to define the responses of sheep to incremental heat load under simulated live export conditions. The study herein describes (1) the heat load imposed, and (2) the effect of this heat load on the growth, performance and behavioural responses of sheep during periods of incremental heat load. Methods A total of 144 Merino wethers (44.02 ± 0.32 kg) were included in a 29-day climate controlled study using two cohorts of 72 sheep (n = 2), exposed to two treatments: (1) thermoneutral and (2) hot (HOT). Ambient temperature (°C) and relative humidity (%) for the HOT treatment were modelled from live export voyages from Australia to the Middle East in July. Climatic conditions within the climate control chambers were recorded at 10-min intervals, then used to calculate a temperature humidity index. Sheep posture, rumination, eating, drinking and demeanour (calm, agitated or depressed) were observed four times daily at 3-h intervals between 0800 hours and 1700 hours. Feed intake was recorded daily and water intake was measured using an automated meter. Sheep were weighed on Day 0 and then at 7-day intervals. Sheep were weighed at slaughter and carcass weights were obtained, these data were used to determine carcass dressing percentage. Data were analysed using a repeated measures model, with a compound symmetry covariance structure. Key results Climatic conditions in the HOT treatment increased incrementally between Day 1 (temperature humidity index ≥19) and Day 29 (temperature humidity index ≤34.7). Behaviour, feed intake, average daily gain (g/day), carcass weight (kg) and dressing percentage were not influenced by treatment (P > 0.05). Sheep in the HOT treatment group showed a 137% increase in water intake (P < 0.01) and on average consumed 2.15 L/sheep.day, whereas the thermoneutral group consumed 1.67 L/sheep.day. Conclusions These results suggest that these sheep were capable of maintaining feed intake and growth despite exposure to heat load, albeit with a 137% increase in water intake. Implications These results highlight the resilience of the Australian Merino genotype, as these sheep were capable of maintaining feed intake and growth during exposure to heat load. As the climatic conditions in this study were modelled based on typical live export vessel conditions, these results may suggest that the climatic conditions experienced by sheep during voyages may not be as critical as previously thought.

scholarly journals Dietary energy, digestible lysine, and available phosphorus levels affect growth performance, carcass traits, and amino acid digestibility of broilers

2018 ◽  
Vol 97 (4) ◽  
pp. 1189-1198 ◽  
Author(s):  
Nishchal K. Sharma ◽  
Mingan Choct ◽  
Mehdi Toghyani ◽  
Yan C.S.M. Laurenson ◽  
C.K. Girish ◽  
...  
Keyword(s):  
Amino Acid ◽  
Growth Performance ◽  
Carcass Traits ◽  
Available Phosphorus ◽  
Dietary Energy ◽  
Phosphorus Levels

scholarly journals Effects of dietary energy and methionine on growth performance and carcass traits of growing Pekin ducks from 15 to 42 days of age

2019 ◽  
Vol 98 (11) ◽  
pp. 5870-5875 ◽  
Author(s):  
Y B Wu ◽  
J Tang ◽  
M Xie ◽  
R Zhao ◽  
W Huang ◽  
...  
Keyword(s):  
Growth Performance ◽  
Carcass Traits ◽  
Dietary Energy ◽  
Pekin Ducks
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