Economic weights for feed intake in the growing pig derived from a growth model and an economic model

2003 ◽  
Vol 81 (4) ◽  
pp. 895-903 ◽  
Author(s):  
S. Hermesch ◽  
E. Kanis ◽  
J. J. Eissen
Keyword(s):  
Growth Model ◽  
Feed Intake ◽  
Economic Model ◽  
Growing Pig ◽  
Economic Weights

scholarly journals Claw health and feed efficiency as new selection criteria in the Czech Holstein cattle Krupová Z., Wolfová M., Krupa E., Přibyl J., Zavadilová L.

2018 ◽  
Vol 63 (No. 10) ◽  
pp. 408-418 ◽  
Author(s):  
Z. Krupová ◽  
M. Wolfová ◽  
E. Krupa ◽  
J. Přibyl ◽  
L. Zavadilová
Keyword(s):  
Feed Intake ◽  
Feed Efficiency ◽  
Disease Incidence ◽  
Selection Index ◽  
Residual Feed Intake ◽  
Selection Response ◽  
Holstein Cattle ◽  
Breeding Objective ◽  
Economic Weights ◽  
The Impact

The objective of this study was to calculate economic weights for ten current breeding objective traits and for four new traits characterising claw health and feed efficiency in Czech Holstein cattle and to investigate the impact of different selection indices on the genetic responses for these traits. Economic weights were estimated using a bio-economic model, while applying actual (2017) and predicted (2025) production and economic circumstances. For the actual situation, the economic weights of claw disease incidence were –100.1 € per case, and those of daily residual feed intake in cows, breeding heifers, and fattened animals were –79.37, –37.16, and –6.33 €/kg dry matter intake per day, respectively. In the predicted situation, the marginal economic weights for claw disease and feed efficiency traits increased on average by 38% and 20%, respectively. The new traits, claw disease incidence and daily residual feed intake, were gradually added to the 17 current Holstein selection index traits to improve the new traits. Constructing a comprehensive index with 21 traits and applying the general principles of the selection index theory, a favourable annual genetic selection response was obtained for the new traits (–0.008 cases of claw disease incidence and –0.006 kg of daily residual feed intake across all cattle categories), keeping the annual selection response of the most important current breeding objective traits at a satisfactory level (e.g., 73 kg of milk yield per lactation, 0.016% of milk fat). Claw health and feed efficiency should be defined as new breeding objectives and new selection index traits of local dairy population.

Genetic improvement of lean meat growth and feed efficiency in pigs

2004 ◽  
Vol 44 (5) ◽  
pp. 383 ◽  
Author(s):  
S. Hermesch
Keyword(s):  
Feed Intake ◽  
Feed Efficiency ◽  
Restricted Feeding ◽  
Cost Component ◽  
Lean Meat ◽  
Testing Procedures ◽  
Growing Pig ◽  
Breeding Programmes ◽  
Selection For ◽  
Feed Costs

Optimising selection procedures for feed efficiency and lean meat growth in pigs is important because feed costs form a high cost component of production. In this paper a number of breeding objectives used in pig industries are reviewed and the concept of the linear-plateau growth model is outlined. This concept allows optimisation of selection for feed intake of the growing pig taking the pigs potential for protein deposition into account. This is a first step towards further collaboration between geneticists and scientists from other disciplines in order to gain a better understanding of physiological consequences of selection. The necessity of recording individual feed intake in group housed pigs has led to the development of electronic feeders. These computerised systems provide additional data including repeated weight and feed intake records as well as feeding pattern traits. How to make best use of this extra information in breeding programmes needs to be explored further. Implications of testing pigs under ad libitum and restricted feeding are outlined and results from selection experiments and commercial group house environments are summarised. The comparison of testing procedures shows that restricted feeding benefits selection for lean meat growth. However, in commercial environments the benefits depend on how well variation in feed intake can be controlled. Testing procedures should be expanded to explain a larger part of variation in daily feed intake, as is currently the case. This unexplained variation may be related to the animal’s activity, social interactions between animals and response to various stressors that occur in commercial group housed environments.

A simulation model for predicting the voluntary feed intake of a growing pig

2011 ◽  
Vol 61 (4) ◽  
pp. 168-186 ◽  
Author(s):  
S. Yoosuk ◽  
H. B. Ong ◽  
S. W. Roan ◽  
C. A. Morgan ◽  
C. T. Whittemore
Keyword(s):  
Simulation Model ◽  
Feed Intake ◽  
Voluntary Feed Intake ◽  
Growing Pig

scholarly journals Review: divergent selection for residual feed intake in the growing pig

animal ◽  
2017 ◽  
Vol 11 (9) ◽  
pp. 1427-1439 ◽  
Author(s):  
H. Gilbert ◽  
Y. Billon ◽  
L. Brossard ◽  
J. Faure ◽  
P. Gatellier ◽  
...  
Keyword(s):  
Feed Intake ◽  
Residual Feed Intake ◽  
Divergent Selection ◽  
Growing Pig ◽  
Selection For

Some effects of alternating high and low levels of feed intake on the performance and composition of the growing pig

1971 ◽  
Vol 13 (1) ◽  
pp. 59-69 ◽  
Author(s):  
V. R. Fowler ◽  
R. M. Livingstone
Keyword(s):  
Feed Intake ◽  
Experimental Period ◽  
Carcass Composition ◽  
Treatment Groups ◽  
Growing Pig ◽  
Overall Performance ◽  
Time Periods ◽  
Low Levels ◽  
The Impact ◽  
All Treatment

SUMMARYThree experiments were carried out in which the level of feed intake of pigs growing from approximately 30 to 90 kg was alternately raised and lowered, using different amplitudes and time-periods. Within each experiment, the total feed intake and the length of the experimental period were the same for all treatment-groups.The two amplitudes which were examined were 112%–88% and 125 %–75% of standard scales of feeding. The time-periods between switches to the alternate level were 1, 3, 7 or 14 days. The impact of the fluctuations in feed intake on overall performance and carcass composition was either trivial or small, and in no case exceeded 5% for any one measurement. It is concluded that fluctuations in feed intake occurring in practical situations will have only trivial effects on performance, provided that pigs receive similar amounts of feed in the same overall period of time.

Biotransformation of trichothecenes alleviates the negative effects of T-2 toxin in pigs

2013 ◽  
Vol 61 (3) ◽  
pp. 333-343 ◽  
Author(s):  
Pál Rafai ◽  
Zoltán Papp ◽  
László Jakab
Keyword(s):  
Molecular Structure ◽  
Growth Rate ◽  
Feed Intake ◽  
Positive Control ◽  
Growing Pigs ◽  
Feed Additive ◽  
Negative Effects ◽  
Growing Pig ◽  
Effect Level

Between 49 and 70 days of age, three groups of growing pigs (n = 10 each) were fed diets containing 0, 0.3 and 0.5 mg/kg T-2 toxin, respectively, for 21 days. The feed of another two groups of pigs (n = 10 each) contained 0.3 or 0.5 mg/kg T-2 toxin, respectively, plus a feed additive developed for splitting up the molecular structure of Fusarium toxins, in particular trichothecenes, by deepoxidation of the molecule, at 2 kg/tonne concentration. One group (n = 10) served as positive control; their feed was free from T-2 toxin but contained the feed additive at the above concentration. Toxin concentrations at these low dietary levels impaired the feed intake and growth rate of pigs. The feed additive alleviated the negative effects and justified its potential for prevention. Data of the present study indicated a 0.2 mg/kg feed no observed effect level (NOEL) of T-2 toxin in growing pig feeds.

scholarly journals Phenotypic and genetic relationships between growth and feed intake curves and feed efficiency and amino acid requirements in the growing pig

animal ◽  
2015 ◽  
Vol 9 (1) ◽  
pp. 18-27 ◽  
Author(s):  
R. Saintilan ◽  
L. Brossard ◽  
B. Vautier ◽  
P. Sellier ◽  
J. Bidanel ◽  
...  
Keyword(s):  
Amino Acid ◽  
Feed Intake ◽  
Feed Efficiency ◽  
Genetic Relationships ◽  
Growing Pig ◽  
Amino Acid Requirements

scholarly journals Re-shaping the Model of Economic Growth of the CEE Countries

2016 ◽  
Vol 6 (2) ◽  
pp. 137-159 ◽  
Author(s):  
Elena Makrevska Disoska
Keyword(s):  
Economic Growth ◽  
Growth Model ◽  
Economic Model ◽  
Growth Strategy ◽  
Eastern European ◽  
The Past ◽  
Policy Measures ◽  
Intensive Growth ◽  
The Eu

Abstract The goal of this paper is to stress the importance of changing the present growth strategy of Central and Eastern European (CEE) economies. The economic model of resource and debt intensive growth they have enjoyed in the past two decades have proved to be ineffective and unsustainable. Given that the CEE growth model cannot be identified separately from the EU as a whole, we try to propose possible policy measures that would stimulate growth in the CEE in context of the policies at the EU level.

Effects of genotype and sex on predicted feed intake and performance of a growing pig

2012 ◽  
Vol 62 (1) ◽  
pp. 13-23 ◽  
Author(s):  
S. Yoosuk ◽  
H. B. Ong ◽  
S. W. Roan ◽  
C. A. Morgan ◽  
C. T. Whittemore
Keyword(s):  
Feed Intake ◽  
Growing Pig ◽  
And Performance
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