scholarly journals Results of selection for breast muscle percentage and feed conversion ratio in Pekin ducks

2011 ◽  
Vol 27 (3) ◽  
pp. 769-776 ◽  
Author(s):  
H. Pingel
Keyword(s):  
Feed Efficiency ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Breast Muscle ◽  
Feed Consumption ◽  
Direct Selection ◽  
Meat Production ◽  
Feed Conversion ◽  
Nitrogen And Phosphorus ◽  
Selection For

Increasing breast muscle percentage by selection for breast layer thickness (muscle and skin) of living ducks by needle probe improves carcass quality as could be demonstrated by experiments and by applied breeding programs. In addition direct selection for individual feed conversion ratio can increase the efficiency of duck meat production. Divergent selection for feed conversion ratio from the age of 4 - 7 weeks over 11 generations has differentiated the feed efficiency by about 25 %. Causes for the reduction in feed conversion ratio are lower fat content of carcass, lower locomotor activity, higher enzymatic activity (alkaline phosphatase and creatinkinase in blood plasma) and better feed protein utilization. Because of lower feed consumption in the line selected for lower feed conversion ratio the emission of nitrogen and phosphorus via manure was reduced by about 39 and 26 %, respectively. That means, selection for better feed efficiency is not only an important economical but also an important ecological factor.

Reducing the cost of beef production through the genetic improvement of net feed efficiency

1998 ◽  
Vol 1998 ◽  
pp. 45-45
Author(s):  
R.M. Herd ◽  
J.A. Archer ◽  
P.F. Arthur ◽  
E.C. Richardson
Keyword(s):  
Feed Efficiency ◽  
Genetic Improvement ◽  
Production Systems ◽  
Growth Efficiency ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Feed Conversion ◽  
Selection For ◽  
The Cost ◽  
Animal Production Systems

Feed is the single largest cost in most animal production systems. Feed conversion ratio (FCR) is a commonly used measure of growth efficiency. Previous research has shown that FCR is moderately heritable and highly related to growth rate. While selection for FCR is beneficial to those feeding growing cattle for slaughter, any associated increase in the size of breeding females will mean this benefit will be at a cost to the calf breeder, as larger breeding cows require more feed.

Reducing the cost of beef production through the genetic improvement of net feed efficiency

1998 ◽  
Vol 1998 ◽  
pp. 45-45
Author(s):  
R.M. Herd ◽  
J.A. Archer ◽  
P.F. Arthur ◽  
E.C. Richardson
Keyword(s):  
Feed Efficiency ◽  
Genetic Improvement ◽  
Production Systems ◽  
Growth Efficiency ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Feed Conversion ◽  
Selection For ◽  
The Cost ◽  
Animal Production Systems

Feed is the single largest cost in most animal production systems. Feed conversion ratio (FCR) is a commonly used measure of growth efficiency. Previous research has shown that FCR is moderately heritable and highly related to growth rate. While selection for FCR is beneficial to those feeding growing cattle for slaughter, any associated increase in the size of breeding females will mean this benefit will be at a cost to the calf breeder, as larger breeding cows require more feed.

scholarly journals Breeding for milk and beef in cattle - designing an overall strategy

1983 ◽  
Vol 55 (6) ◽  
pp. 547-553
Author(s):  
Veijo Vilva ◽  
U. B. Lindström
Keyword(s):  
Milk Production ◽  
Feed Efficiency ◽  
Performance Test ◽  
Feed Consumption ◽  
Direct Selection ◽  
Economic Gain ◽  
Feed Conversion ◽  
Milk Traits ◽  
Dual Purpose ◽  
Selection For

A three-stage selection programme of dual purpose bulls was studied in order to assess the significance of the selection stages and the genetic gain to be expected. In accordance with previous studies the results showed that over 90 % of the economic gain comes from the milk traits. In addition the study showed that over 10 % of the gain is due to the increased feed conversion efficiency, mainly in milk production. The beef performance test of young bulls accounted for only 1—2 % of the total economic gain. Therefore the test stations setup for this purpose might be more efficiently utilised by concentrating on measurement of feed conversion. The study also indicated that direct selection for feed efficiency in milk production would give appreciably higher gain even if it were done on the basis of only 5 daughters/ bull. In practice this might be accomplished by measuring the feed consumption of a limited number of daughters per young bull, 4-5 months after calving for about one month or by collecting 200—300 individual mid-lactational feed consumption records for daughters of young bulls.

scholarly journals Productivité des cochons d’Inde (Cavia porcellus) supplémentés au Commelina benghalensis et au Moringa oléifera.

2019 ◽  
Vol 41.2 ◽  
pp. 6951-6964
Author(s):  
Abossèdé Murielle Lucrèce Faïhun ◽  
Coovi Guénolé Akouedegni ◽  
Goué Georcelin Alowanou ◽  
Pascal Abiodoun Olounladé ◽  
Alex Gbêliho Zoffoun ◽  
...  
Keyword(s):  
Weight Gain ◽  
Growth Performance ◽  
Abdominal Fat ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Daily Weight Gain ◽  
Feed Consumption ◽  
Meat Production ◽  
Feed Conversion ◽  
Leaf Meal

To contribute solutions to the problem of animal protein shortage for human consumption in Cameroon, a study was conducted at the Teaching and Research Farm of the University of Dschang- Cameroon to evaluate the effects of inclusion levels of Tithonia diversifolia leaf meal (TDLM) on growth performance and carcass characteristics of rabbits. The leaves were chopped, boiled for 5 minutes, drained, sundried, milled and analysed for proximate composition in the Laboratory of Animal Nutrition. The leaf meal was used to formulate 4 experimental diets containing 0% (control) 15, 20 and 25% of the TDLM, corresponding to T0, T1, T2 and T3, respectively. A total of 40 (20 males and 20 females) 2-months-old rabbits, weighing 1000 ± 125g were randomly assigned to the 4 dietary treatments in a 4 x 10 replicates in a completely randomized design. The live weights of the animals were evaluated weekly for 9 weeks. Eight (8) rabbits (4 males and 4 females) per treatment were randomly selected and sacrificed for carcass evaluation. The data collected were then submitted to one-way Analysis of Variance (ANOVA). Mean differences were separated using Duncan. The results showed that incorporation of TDLM induced a decrease in daily feed consumption. The least daily feed intake was observed in treatment T3 (109.14g/d) while the highest daily weight gain (24.49g/d) and the least feed conversion ratio (4.61) were also observed in the same treatment T3. However, no significant differences were observed for these parameters (P>0.05) between the treatments although daily weight gain was higher and feed conversion ratio lower in the males as compared to the females. Carcass yield (C.Y.) was higher in the control T1 (52.39%) though comparable (P>0.05) with all the other treatments. Abdominal fat was significantly (P<0.05) lower (1.90%) in the treatment T0 but it was comparable to T3 while it was highest (2.28%) in T2. However, C.Y. was higher in males and abdominal fat was higher in females when sex was considered. The relative weight of the lungs was highest in T1 (0.55%), liver in T2 (2.25%), kidneys in T1 (0.56%) and the heart in treatment T2 (0.25%) though, there were no significant differences (P> 0.05) observed in organs weights. Although there were significant differences between organs of different sexes, no regular pattern was maintained. These all signified nutritional adequacy at all levels of inclusion of TDLM, improving growth performance at the inclusion level of 25%. T. diversifolia leaves boiled for 5 minutes, sundried and milled can therefore be used as an alternative ingredient which when included in the rations of rabbits up to 25%, still compares well with conventional ingredients in growth and carcass performance irrespective of the sex. However, the use of TDLM could significantly reduce the cost of feeding and enhance meat production as it is relatively more abundant as compared to other ingredients

scholarly journals Simulated Direct Selection for Feed Conversion Ratio in Laying Hens and its Effect on Relative Traits

2012 ◽  
Vol 11 (4) ◽  
pp. 454-457
Author(s):  
Zhong Hua Ning ◽  
Zong Tao Peng ◽  
Chuan Wei Zheng ◽  
Bing Liao ◽  
Hong Guang Qiao
Keyword(s):  
Laying Hens ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Direct Selection ◽  
Feed Conversion ◽  
Selection For

Influence of Lactobacillus casei WB 315 and crude fish oil (CFO) on growth performance, EPA, DHA, HDL, LDL, cholesterol of meat broiler chickens

2020 ◽  
Author(s):  
Andreas Berny Yulianto ◽  
Widya Paramita Lokapirnasari ◽  
Rifqi Najwan ◽  
Hana Cipka Pramuda Wardhani ◽  
Nabil Fariz Noor Rahman ◽  
...  
Keyword(s):  
Fish Oil ◽  
Growth Performance ◽  
Feed Efficiency ◽  
Lactobacillus Casei ◽  
Broiler Chickens ◽  
Basal Diet ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Feed Consumption ◽  
Feed Conversion

Background and Objectives: Use of antibiotics as growth promoters in animal feeds has been restricted due to the residues in poultry products such as egg and meat, furthermore to the antibiotic resistant of pathogenic bacteria. The prohibition of their use opens the opportunity for the use of non-antibiotic feed additives such as probiotics. The objectives of this study were to investigate the effect of the addition of  Lactobacillus casei WB 315 and crude fish oil (CFO) to diets on growth performance, eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA), low density lipoproteins (LDL), high density lipoprotein (HDL), and cholesterol levesl of  broiler chickens. Materials and Methods: In this research, one-day old male broiler chicks were used and divided equally into four groups, namely a basal diet without L. casei WB 315 and without CFO (P0), basal diet supplemented with 0.5% L. casei WB 315 of total broiler basal feed (1.2 × 109 cfu/ml) and without CFO (P1), basal diet supplemented without L. casei WB 315 and 1% CFO of total broiler basal feed (P2), and basal diet supplemented with 0.5% L. casei WB 315 of total broiler basal feed (1.2 × 109 cfu/ml) and 1% CFO of total broiler basal feed (P3) for 35 days. Results: The results of addition 0.5% Lactobacillus casei WB 315 (1.2 × 109 cfu/ml) and 1% CFO of total broiler basal feed after 35 days showed significant difference among treatment in feed efficiency (p<0.05), feed conversion ratio (p<0.05), feed consumption (p<0.05), EPA (p<0.05), DHA (p<0.05), increase HDL (p<0.05), reduced the LDL (p<0.05), and reduce cholesterol (p<0.05) in meat broiler chicken. Conclusion: It is concluded that the addition of L. casei WB 315 and crude fish oil (CFO) could significant improve the growth performance (feed efficiency, feed conversion ratio, feed consumption) and could significantly improve EPA, DHA and increase HDL and decrease LDL in meat poultry product.  

The Potency of Bifidobacterium spp. as an Alternative to Antibiotic Growth Promoters on Feed Conversion Ratio, Feed Efficiency, and Nutrient Intake in Laying Hens

2021 ◽  
Vol 56 (2) ◽  
pp. 281-290
Author(s):  
Andreas Berny Yulianto ◽  
Anam Al Arif ◽  
Widya Paramita Lokapirnasari
Keyword(s):  
Feed Efficiency ◽  
Protein Intake ◽  
Crude Protein ◽  
Laying Hens ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Crude Fiber ◽  
Fiber Intake ◽  
Feed Conversion ◽  
Growth Promoters

This article describes a new idea about using Bifidobacteriumsp isolates as an alternative to antibiotic growth promoters, based on the ability of Bifidobacteriumsp isolates, which have the potential as a probiotic in laying hens. This study aims to prove that Bifobacteriumsp could improve production performance, including feed conversion ratio, feed efficiency, and nutrient intake (feed intake, crude protein intake, crude fiber intake, lipid intake, and organic matter). A total of 150 laying hens at 25 weeks of age were divided into three groups (P0: control, P1: 0.1% antibiotic growth promoters, P1: 0.05% Bifidobacterium spp. probiotic) and fed on a basal diet containing 2750 kcal/kg metabolizable energy and 18% crude protein for four weeks. The different supplementation to the basal diets showed significant differences (p<0.05) on feed conversion ratio, feed efficiency, feed intake, crude protein intake, crude fiber intake, lipid intake, and organic matter intake among the treatments. However, feed intake, feed conversion ratio, crude protein intake, crude fiber intake, lipid intake, and organic matter intake were lowest in the group fed with 0.5% of Bifidobacterium spp. The highest feed efficiency was obtained from the groups fed with 0.5% of Bifidobacterium spp, compared with the control and supplemented antibiotics growth promoters group. 0.5% of Bifidobacterium spp. supplementation to the diet of laying hens is beneficial for increasing feed efficiency and improving feed conversion ratio. The practical and theoretical significance of the results is that Bifidobacterium spp. can be used to improve production performance in laying hens.

scholarly journals Broiler Breeder Performance in The Final Phase of Grower

JURNAL TERNAK ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 36
Author(s):  
Tetty Barunawati Siagian ◽  
Nabilah Khoirunnisa Nugraheni
Keyword(s):  
Broiler Chicken ◽  
Nutritional Value ◽  
Bodyweight Gain ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Feed Consumption ◽  
Feed Conversion ◽  
Final Phase ◽  
High Quality ◽  
Broiler Breeder

One of the comestibles that have high nutritional value and are easy to obtain is chicken. The higher demand for chicken must be accompanied by an increase in production. It is important for the breeder of broiler chicken to choose high quality Day Old Chick (DOC) from the broiler breeder which also has high quality and productivity. The type of broiler breeder that is grown in PT. Karya Indah Pertiwi is Ross 308. Observations were made when the chickens were 18th to 21st weeks old in 6 henneries totaling about 10,000 chickens. The performance of broiler breeder observed were feed consumption, bodyweight gain, feed conversion ratio, and uniformity. Feed consumption of broiler breeder at 18th to 21st week was 659.4 g/chicken, 700,583 g/chicken, 742,116 g/chicken, 767.2 g/chicken. Bodyweight gain at 18th to 21st week was 143.51 g/chicken, 193.3 g/chicken, 63.43 g/chicken, 167.96 g/chicken. Feed conversion ratio at 18th to 21st week was 4.5, 3.6, 11.6, 4.5. The uniformity at 18th to 21st week was 77%, 81%, 81%, 81%. In conclusion, the value of feed consumption for broiler breeder at PT. Karya Indah Pertiwi was increasing every week. Bodyweight gain at 20th week was lower than 18th, 19th, and 21st week. The value of feed conversion ratio at 20th week was higher than at 18th, 19th, and 21st week. Chicken uniformity value at 18th week was not good it was at 77%, while at the 19th, 20th, and 21st week it was quite good at 81%.

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