scholarly journals Relative Growth Rate of Beef Cattle Expressed Using Factors Related to Feed Intake, Maintenance Requirements and Feed Efficiency

10.5109/24195 ◽  
1997 ◽  
Vol 42 (1/2) ◽  
pp. 87-93
Author(s):  
Masataka Shimojo ◽  
Takashi Bungo ◽  
Yoshimi Imura ◽  
Manabu Tobisa ◽  
Naoki Koga ◽  
...  
Keyword(s):  
Growth Rate ◽  
Beef Cattle ◽  
Relative Growth Rate ◽  
Feed Intake ◽  
Feed Efficiency ◽  
Relative Growth ◽  
Maintenance Requirements

scholarly journals Factors affecting actual weaning weight, preweaning average daily gain and relative growth rate in Asturiana de los Valles beef cattle breed

2003 ◽  
Vol 46 (3) ◽  
pp. 235-243 ◽  
Author(s):  
F. Goyache ◽  
I. Fernández ◽  
L. J. Royo ◽  
I. Álvarez ◽  
J. P. Gutiérrez
Keyword(s):  
Growth Rate ◽  
Beef Cattle ◽  
Relative Growth Rate ◽  
Average Daily Gain ◽  
Cattle Breed ◽  
Weaning Weight ◽  
Relative Growth ◽  
Factors Affecting ◽  
Improvement Programs ◽  
Daily Gain

Abstract. In this paper we analyse the major environmental and genetic factors affecting actual weaning weight (WW), preweaning average daily gain (ADG) and relative growth rate (RGR) in a representative sample of field data of Asturiana de los Valles beef cattle breed. Major environmental factors affect preweaning growth performance of Asturiana de los Valles calves in the direction usually found in the literature. However RGR seems to be self-corrected for sex of calf and calving number. Heritabilities for the direct and maternal genetic effects were 0.67 and 0.29, 0.51 and 0.31 and 0.18 and 0.12 respectively for WW, ADG and RGR. The estimates of genetic parameters affecting RGR are more realistic than those estimated for the WW and ADG. Selection for RGR would lead to obtain higher growth rates and lower birth weights. RGR could be an interesting selection criterion in beef cattle improvement programs.

scholarly journals Prevention of Aeromonas hydrophila on catfish juvenile using garlic and shatterstone herb

2014 ◽  
Vol 12 (1) ◽  
pp. 86 ◽  
Author(s):  
Dinamella Wahjuningrum ◽  
Retno Astrini ◽  
Mia Setiawati
Keyword(s):  
Growth Rate ◽  
Relative Growth Rate ◽  
Feed Intake ◽  
Aeromonas Hydrophila ◽  
Challenge Test ◽  
Positive Control ◽  
Second Step ◽  
Immersion Method ◽  
Relative Growth ◽  
Dose Determination

<p class="NoParagraphStyle" align="center"><strong>ABSTRACT</strong></p><p class="NoParagraphStyle" align="center"> </p><p class="NoParagraphStyle">This study aimed to determine the dose of garlic and shatterstone herb mixed into the feed in 11-day old catfish juvenile (body length 1.53±0.26 cm, body weight of 40±16 mg). The study was divided into two steps, the first step was dose determination and the second step was the dose testing. The treatment was carried out for 21 days, then the challenge test was conducted by immersion method for 60 minutes in <em>A. hydrophila</em> density of 10<sup>4 </sup>cfu/mL. Parameters of observation were survival, feed intake, relative growth rate, morphology of the liver, and water quality. The result showed that garlic at 25 g/kg and shatterstone herb at 5 g/kg provided higher fish viability (81.11±3.85%) compared with the control (23.00±5.77%). Feed intake and relative growth rate were not different among the treatments. Whereas the liver condition in positive control was paler than other treatments. Thus, prevention of <em>A. hydrophila</em> infection on catfish juvenile was effectively achieved by feeding with diet supplemented by garlic 25 g/kg and shatterstone herb 5 g/kg.</p><p class="NoParagraphStyle"> </p><p class="NoParagraphStyle">Keywords: garlic, shatterstone herb, <em>Aeromonas hydrophila</em>, juvenile, catfish</p><p class="NoParagraphStyle"> </p><p class="NoParagraphStyle"> </p><p class="NoParagraphStyle" align="center"><strong>ABSTRAK</strong></p><p class="NoParagraphStyle"> </p><p class="NoParagraphStyle"> Penelitian ini bertujuan untuk menentukan dosis bawang putih dan meniran yang dicampur ke pakan dalam bentuk tepung pada benih lele berumur 11 hari (berukuran panjang 1,53±0,26 cm dan bobot 40±16 mg). Penelitian ini terbagi menjadi dua tahap, pertama adalah tahap penentuan dosis (dosis 20 ppt bawang putih+5 ppt meniran dan 25 ppt bawang putih+5 ppt meniran) dan kedua adalah tahap pengujian dosis. Perlakuan diberikan selama 21 hari, kemudian uji tantang dilakukan dengan metode perendaman selama 60 menit dengan kepadatan bakteri <em>A. hydrophila</em> 10<sup>4</sup> cfu/mL. Parameter yang diamati adalah kelangsungan hidup, jumlah konsumsi pakan, pertumbuhan relatif, morfologi organ hati, dan kualitas air. Hasil penelitian membuktikan bahwa perlakuan bawang putih 25 g/kg dan meniran 5 g/kg memberikan kelangsungan hidup benih lele sebesar 81,11±3,85%, sedangkan kontrol positif 23,00±5,77%. Jumlah konsumsi pakan dan pertumbuhan relatif tidak berbeda antarperlakuan, sedangkan organ hati berwarna pucat pada kontrol positif. Pencegahan infeksi bakteri <em>A. hydrophila</em> dengan pakan campuran bawang putih 25 g/kg dan meniran 5 g/kg efektif dilakukan pada benih ikan lele.</p><p class="NoParagraphStyle" align="center"> </p><p class="NoParagraphStyle">Kata kunci: bawang putih, meniran, <em>Aeromonas hydrophila</em>, benih, ikan lele</p><p> </p>

scholarly journals RAPID COMMUNICATION: Residual feed intake in beef cattle is associated with differences in protein turnover and nutrient transporters in ruminal epithelium

2019 ◽  
Vol 97 (5) ◽  
pp. 2181-2187
Author(s):  
Ahmed A Elolimy ◽  
Emad Abdel-Hamied ◽  
Liangyu Hu ◽  
Joshua C McCann ◽  
Daniel W Shike ◽  
...  
Keyword(s):  
Amino Acid ◽  
Beef Cattle ◽  
Protein Degradation ◽  
Insulin Signaling ◽  
Feed Intake ◽  
Feed Efficiency ◽  
Protein Turnover ◽  
Residual Feed Intake ◽  
Ubiquitin Proteasome ◽  
Ruminal Epithelium

Abstract Residual feed intake (RFI) is a widely used measure of feed efficiency in cattle. Although the precise biologic mechanisms associated with improved feed efficiency are not well-known, most-efficient steers (i.e., with low RFI coefficient) downregulate abundance of proteins controlling protein degradation in skeletal muscle. Whether cellular mechanisms controlling protein turnover in ruminal tissue differ by RFI classification is unknown. The aim was to investigate associations between RFI and signaling through the mechanistic target of rapamycin (MTOR) and ubiquitin-proteasome pathways in ruminal epithelium. One hundred and forty-nine Red Angus cattle were allocated to 3 contemporary groups according to sex and herd origin. Animals were offered a finishing diet for 70 d to calculate the RFI coefficient for each. Within each group, the 2 most-efficient (n = 6) and least-efficient animals (n = 6) were selected. Compared with least-efficient animals, the most-efficient animals consumed less feed (P &lt; 0.05; 18.36 vs. 23.39 kg/d DMI). At day 70, plasma samples were collected for insulin concentration analysis. Ruminal epithelium was collected immediately after slaughter to determine abundance and phosphorylation status of 29 proteins associated with MTOR, ubiquitin-proteasome, insulin signaling, and glucose and amino acid transport. Among the proteins involved in cellular protein synthesis, most-efficient animals had lower (P ≤ 0.05) abundance of MTOR, p-MTOR, RPS6KB1, EIF2A, EEF2K, AKT1, and RPS6KB1, whereas MAPK3 tended (P = 0.07) to be lower. In contrast, abundance of p-EEF2K, p-EEF2K:EEF2K, and p-EIF2A:EIF2A in most-efficient animals was greater (P ≤ 0.05). Among proteins catalyzing steps required for protein degradation, the abundance of UBA1, NEDD4, and STUB1 was lower (P ≤ 0.05) and MDM2 tended (P = 0.06) to be lower in most-efficient cattle. Plasma insulin and ruminal epithelium insulin signaling proteins did not differ (P &gt; 0.05) between RFI groups. However, abundance of the insulin-responsive glucose transporter SLC2A4 and the amino acid transporters SLC1A3 and SLC1A5 also was lower (P ≤ 0.05) in most-efficient cattle. Overall, the data indicate that differences in signaling mechanisms controlling protein turnover and nutrient transport in ruminal epithelium are components of feed efficiency in beef cattle.

Sign in / Sign up

Export Citation Format

Share Document