scholarly journals The effect of immunization against gonadotropin-releasing factor on growth performance, carcass characteristics and boar taint relevant to pig producers and the pork packing industry: A meta-analysis

2018 ◽  
Vol 119 ◽  
pp. 182-195 ◽  
Author(s):  
B. Poulsen Nautrup ◽  
I. Van Vlaenderen ◽  
A. Aldaz ◽  
C.K. Mah
Keyword(s):  
Growth Performance ◽  
Meta Analysis ◽  
Carcass Characteristics ◽  
Boar Taint ◽  
Gonadotropin Releasing Factor

119 Lysine Requirement of Market Gilts Immunized Against Gonadotropin-releasing Factor on Performance and Carcass Composition

2021 ◽  
Vol 99 (Supplement_1) ◽  
pp. 35-36
Author(s):  
Kimberly A Vonnahme ◽  
Deb Amodie ◽  
John Patience ◽  
Steve Pollmann ◽  
Lucina Galina-Pantoja ◽  
...  
Keyword(s):  
Growth Performance ◽  
Carcass Characteristics ◽  
Carcass Composition ◽  
Carcass Weight ◽  
Experimental Unit ◽  
Gonadotropin Releasing Factor

Abstract The objectives were to determine if the augmented growth performance of gilts administered anti-gonadotropin-releasing factor (GnRF) would require additional lysine and if anti-GnRF-treated gilts would require additional lysine to enhance carcass characteristics. The study treatments were arranged as a 2×3 factorial: control vs anti-GnRF (day 7 and 84; day 0 = 11 wk of age) and lysine at 100, 110, or 120% of requirement of the control gilts. Pen (n = 60) was the experimental unit (10 pens per treatment with 18 or 19 pigs per pen). There was no lysine × anti-GnRF interactions (P ≥ 0.2). Immunized gilts grew 3.7% faster and consumed 3.9% more feed with similar gain:feed from day 0 to market with increases occurring after the administration of the 2nd anti-GnRF dose. Immunized gilts weighed 3.4-kg more at marketing. The timing of marketing (4- or 6-week post 2nd dose) influenced the effects of anti-GnRF. Hot carcass weight, loin depth, and belly weight and thickness in anti-GnRF treated gilts were similar to control gilts at 4-weeks post 2nd dose but were greater in anti-GnRF vs. control (P ≤ 0.05) when harvested 6-weeks post 2nd dose. Backfat was greater, and lean was less, in immunized gilts vs. controls regardless of time to harvest. In conclusion, gilts immunized against GnRF had heavier carcass weights and required no additional lysine compared to controls.

The effects of copper source and concentration on growth performance, carcass characteristics, and pen cleanliness in finishing pigs

2017 ◽  
Vol 95 (9) ◽  
pp. 4052 ◽  
Author(s):  
K. F. Coble ◽  
J. M. DeRouchey ◽  
M. D. Tokach ◽  
S. S. Dritz ◽  
R. D. Goodband ◽  
...  
Keyword(s):  
Growth Performance ◽  
Carcass Characteristics ◽  
Finishing Pigs

scholarly journals The Dietary Supplemental Effect of Nitroethanol in Comparison with Monensin on Methane Emission, Growth Performance and Carcass Characteristics in Female Lambs

Animals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 327
Author(s):  
Zhen-Wei Zhang ◽  
Yan-Lu Wang ◽  
Yong-Yan Chen ◽  
Luo-Tong Zhang ◽  
Ying-Jie Zhang ◽  
...  
Keyword(s):  
Energy Loss ◽  
Growth Performance ◽  
Economic Efficiency ◽  
Carcass Characteristics ◽  
Basal Diet ◽  
Nutrient Digestibility ◽  
Dietary Energy ◽  
Ch4 Production ◽  
Net Revenue ◽  
Emission Growth

This study was conducted to evaluate the dietary supplemental effects of 2-nitroethanol (NEOH) in comparison with monensin on methane (CH4) emission, growth performance and carcass characteristics in female lambs. Sixty female, small-tailed Chinese Han lambs (3.5 ± 0.3 month) were randomly allotted into three dietary treatment groups: (1) Control group, a basal control diet, (2) monensin group, the basal diet added with 40 mg/kg monensin, (3) NEOH group, the basal diet added with 277 mg/kg nitroethanol, and the feedlotting trial lasted for 70 days. Although dietary addition of monensin and NEOH did not affect nutrient digestibility of lambs, both monensin and NEOH decreased the calculated CH4 production (12.7% vs. 17.4% decrease; p < 0.01). In addition, the CH4 production represents less dietary energy loss in the monensin and NEOH group than in the control, indicating that monensin and NEOH are potent CH4 inhibitors that can reduce dietary energy loss. Dietary addition of monensin and NEOH decreased dry matter intake (p < 0.01); however, they increased the ADG of female lambs (p < 0.01). As a result, both monensin and NEOH increased feed conversion efficiency of the feedlotting lambs (p < 0.01), suggesting that feed energy saved from CH4 production promoted the feed efficiency and ADG in the present study. Except for the fact that NEOH addition increased the net muscle percentage to carcass weight (p = 0.03), neither monensin nor NEOH had a significant influence on carcass characteristics of female lambs (p > 0.05). From an economic point of view, NEOH and monensin caused a reduction in feed consumption costs, therefore resulting in a higher net revenue and economic efficiency than the control. In summary, dietary supplementation of NEOH in comparison with monensin presented a more promoting effect on energy utilization in female lambs by inhibiting rumen methanogenesis more efficiently, and NEOH improved the net revenue and economic efficiency more significantly than monensin.

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