The Muzaffarnagari sheep, a mutton breed in India

2000 ◽  
Vol 28 ◽  
pp. 19-25 ◽  
Author(s):  
A. Mandal ◽  
L.B. Singh ◽  
P.K. Rout
Keyword(s):  
Conversion Efficiency ◽  
Uttar Pradesh ◽  
Body Growth ◽  
Sheep Breed ◽  
Feed Conversion ◽  
Feed Conversion Efficiency ◽  
Body Weights ◽  
High Feed ◽  
Average Body

SummaryThe Muzaffarnagari is the largest and heaviest sheep breed of India. It is well adapted to the hot humid irrigated regions. This breed is generally found in the Muzaffarnagari, Bulandshahr, Saharanpur, Meerut, Bijnor and Dehradun districts of Uttar Pradesh and in some parts of Delhi and Haryana. The fast body growth coupled with high feed conversion efficiency are the main characteristics of this breed. The animals are medium to large in size, having slight convex face lines. The coat is generally white and dense but relatively coarse and the head is large with long and drooping ears. Both male and females are polled. The tail is very long and extends to the fetlock joint. The average body weights at birth, 3, 6, 9 and 12 months of age were 3.49±0.04, 15±0.20, 26.5±3.56, 30.4&0.40 and 33.4±0.46 kg, respectively.

Growth, feed intake and maternal performance of Angus heifers from high and low feed efficiency selection lines

2014 ◽  
Vol 54 (9) ◽  
pp. 1428 ◽  
Author(s):  
S. T. Morris ◽  
F. Y. Chan ◽  
N. Lopez-Villalobos ◽  
P. R. Kenyon ◽  
D. J. Garrick ◽  
...  
Keyword(s):  
Conversion Efficiency ◽  
Feed Intake ◽  
Feed Efficiency ◽  
Production Systems ◽  
Feed Conversion ◽  
Feed Conversion Efficiency ◽  
Herbage Intake ◽  
High Feed ◽  
Maternal Performance ◽  
Angus Heifers

Feed conversion efficiency is an important factor affecting profitability for cow-calf production systems. One method of characterising feed conversion efficiency is by calculating residual feed intake (RFI), the difference between measured and expected feed intakes. A high RFI value indicates low feed efficiency while a low RFI value indicates high feed efficiency. The present experiment used 49 Angus heifers sired by Angus bulls selected for high or low RFI. The progeny were bred on commercial farms and then transferred to Massey University at weaning at ~200 days of age. The heifers were weighed at ~30-day intervals and were mated at 15 months, calved at 2 years old and reared their calf to ~160 days of age. Each heifer had recorded its own liveweight gain (from its weaning to weaning of its first calf), herbage intake at 350 and 450 days of age using the n-alkane technique and maternal performance (calf production). These records were analysed to estimate the RFI of each heifer, and to determine differences in RFI between selection lines. There were no significant differences (P > 0.05) in liveweight or dry matter requirements between selection lines at Day 350, but differences were significant (P < 0.05) at Day 450 such that the high feed efficiency line were 24.6 kg heavier and required an extra 0.32 kg/head.day of herbage. There were no significant differences (P > 0.05) between the two lines in herbage intake or RFI measured at either Days 350 or 450. There were no differences (P > 0.05) in pregnancy rates, calf birth dates or birthweights, estimated 24-h milk production or calf weaning weights between the two lines. This experiment shows that beef cattle selected for low RFI have higher growth rates and heavier liveweights than cattle selected for high RFI; both lines had similar calf production at first breeding.

scholarly journals Evolution in Configuration and Productivity of New Zealand Hill Country Sheep and Beef Cattle Systems

Agriculture ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 531
Author(s):  
Januarius Gobilik ◽  
Stephen Todd Morris ◽  
Cory Matthew
Keyword(s):  
New Zealand ◽  
Beef Cattle ◽  
Conversion Efficiency ◽  
Production Systems ◽  
Metabolic Energy ◽  
Meat Production ◽  
Feed Conversion ◽  
Feed Conversion Efficiency ◽  
Hill Country ◽  
Cattle Systems

Metabolic energy budgeting (MEB) was used to evaluate evolution over 30 years (1980–1981 to 2010–2011) in New Zealand southern North Island ‘hill country’ sheep and beef cattle systems. MEB calculates energy required by animals for body weight maintenance, weight gain or loss, pregnancy, and lactation to estimate the system feed demand and thereby provide a basis for calculating feed conversion efficiency. Historic production systems were reconstructed and modeled using averaged data from industry surveys and data from owners’ diaries of three case-study farms and reviewed for patterns of change over time. The modeling indicated that pasture productivity was 11% lower and herbage harvested was 14% lower in 2010–2011 than in the early 1980s. This productivity decline is attributable to warmer, drier summer weather in recent years. However, primarily through increased lambing percentage, feed conversion efficiency based on industry data improved over the study period from 25 to 19 kg feed consumed per kg lamb weaned, while meat production rose from 137 to 147 kg per ha per year. Similar improvements were observed for the three case farms. The New Zealand MEB model was found effective for analysis of tropical beef production systems in Sabah, Malaysia.

Heterozygous depletion of pik3r1 improves growth and feed conversion efficiency in Gibel carp (Carassius gibelio)

Aquaculture ◽  
2021 ◽  
pp. 737207
Author(s):  
Jianfei Huang ◽  
Chuang Shi ◽  
Yanping Gao ◽  
Jingzhi Su ◽  
Yuqin Shu ◽  
...  
Keyword(s):  
Conversion Efficiency ◽  
Gibel Carp ◽  
Feed Conversion ◽  
Feed Conversion Efficiency ◽  
Carassius Gibelio

scholarly journals Effect of forage to concentrate ratio and duration of feeding on growth and feed conversion efficiency of male lambs

2018 ◽  
Vol 2 (4) ◽  
pp. 419-427 ◽  
Author(s):  
Noel A Claffey ◽  
Alan G Fahey ◽  
Vasiliki Gkarane ◽  
Aidan P Moloney ◽  
Frank J Monahan ◽  
...  
Keyword(s):  
Conversion Efficiency ◽  
Carcass Weight ◽  
Feed Conversion ◽  
Fresh Weight ◽  
Viable Option ◽  
Financial Return ◽  
Feed Conversion Efficiency ◽  
Ad Libitum ◽  
The Cost ◽  
Concentrate Inclusion

Abstract Rations (DM basis) for spring-born male lambs consisting of concentrates ad libitum (CON), 50:50 (50% concentrate:50% forage), and forage ad libitum (FORG) were evaluated across feeding periods of three durations (36, 54, and 72 d). Lambs on CON diets were offered ad libitum access to concentrate along with 400 g of fresh weight silage (daily), while 50:50 diets were offered 0.9 and 3.0 kg of concentrate and silage, respectively. Lambs on FORG were offered ad libitum access to 25.5% DM silage. These rations were fed to 99 spring-born male Texel cross Scottish Blackface lambs which were assigned to a 3 × 3 factorial arrangement. Lambs were slaughtered following completion of their respective treatments. Lambs fed CON diets had greater ADG, FCE, and carcass weight (P &lt; 0.001) and carcasses with greater conformation score (P &lt; 0.001) than lambs fed 50:50 or FORG diets. Duration of feeding had no effect on production variables across all three concentrate inclusion levels. It was concluded that the inclusion of concentrates is needed to adequately finish lambs fed indoors. Feeding lamb’s 50:50 diets resulted in modest responses and may be a viable option for finishing lambs or to maintain growth in lambs when the cost of concentrate feed is high relative to the financial return on the lamb meat.

scholarly journals Effects of feed intake and genetics on tissue nitrogen-15 enrichment and feed conversion efficiency in sheep1

2015 ◽  
Vol 93 (12) ◽  
pp. 5849-5855 ◽  
Author(s):  
L. Cheng ◽  
C. M. Logan ◽  
R. J. Dewhurst ◽  
S. Hodge ◽  
H. Zhou ◽  
...  
Keyword(s):  
Conversion Efficiency ◽  
Feed Intake ◽  
Feed Conversion ◽  
Feed Conversion Efficiency ◽  
Tissue Nitrogen

scholarly journals Feed Conversion Efficiency (FCE) in Relation to Reproductive Performance of Sow

2018 ◽  
Vol 7 (1) ◽  
pp. 2915-2919
Author(s):  
Kandarpa Boruah ◽  
Jitendra Saharia ◽  
Simson Soren ◽  
Karuna Saikia ◽  
Arindam Chakraborty ◽  
...  
Keyword(s):  
Conversion Efficiency ◽  
Reproductive Performance ◽  
Feed Conversion ◽  
Feed Conversion Efficiency

scholarly journals Effect of Diatomaceous Earth on Growth Rate, Egg Production, Feed Conversion Efficiency and Parasitic Load in Hens Raised on Deep Litter

2021 ◽  
Vol 3 (1) ◽  
pp. 97-103
Author(s):  
Robert Alex Isabirye ◽  
Savino Biryomumaisho ◽  
James Okwee-Acai ◽  
Samuel Okello ◽  
George William Nasinyama
Keyword(s):  
Growth Rate ◽  
Conversion Efficiency ◽  
Egg Production ◽  
Diatomaceous Earth ◽  
Agricultural Research ◽  
Ascaridia Galli ◽  
Feed Conversion ◽  
Indigenous Chicken ◽  
Feed Conversion Efficiency ◽  
Treatment Groups

The efficacy of diatomaceous earth (DE) on growth rate, egg production and on increasing feed conversion efficiency in deep litter raised layer hens was evaluated. The study was conducted at Mukono Zonal Agricultural Research and Development Institute (MUZARDI) in Uganda. Worms were collected from fresh intestines of indigenous chicken obtained from Kalerwe chicken market near Kampala. The DE was mined in Pakwach (formerly Nebbi) district in Northern Uganda. Chickens of the Lohmann Brown breed raised on deep litter were studied. At 7 weeks the birds were divided into 5 treatment groups, A, B, C, D and E each composed of 40 birds. Groups C, D and E were given an oral dose containing 250 embryonated eggs of A. galli while groups A and B were not infected. The chicks were weighed; and subjected to feeding trials as arranged below: A – Non-infected birds on DE (4%) supplemented diet; B –non-infected birds on neither piperazine (a conventional de-wormer) nor DE; C – infected birds on DE supplemented diet; D – infected birds on piperazine; and group E – infected birds on neither DE nor piperazine applied. Fecal samples were collected and analysed in the laboratory biweekly at week 16 till week 22 respectively for fecal egg counts. In a subsequent experiment, day-old layer chicks from Lohmann Brown strain but different from those used in earlier experiments, were used to assess the effect of DE on egg production. At 17 weeks of age the 420 were divided as follows: 6 treatment groups each having 7 replicates and each replicate having 10 birds. This study showed that DE can be used successfully in growing pullet diets to correct nutritional mineral imbalance since it supplies more than 14 trace elements and other elements. Diatomaceous earth also enables pullets to cope with Ascaridia galli load; and 2% DE supplementation did not have significant improvement on egg production as compared to no supplementation at all. However, reduction in egg production was experienced when supplementation with levels of DE higher that 2% was applied. Results from biweekly fecal analyses showed significant differences in fecal egg counts (p<0.05); and treatment by group (p<0.05).

Effect of hypothyroidism on growth performance, carcass composition and meat quality of fat-tailed Lori-Bakhtiari lambs

2015 ◽  
Vol 55 (10) ◽  
pp. 1324 ◽  
Author(s):  
Yousef Baghcheghi ◽  
Ahmad Zare Shahneh ◽  
Mahdi Ganjkhanlou ◽  
Mahdi Khodaei Motlagh ◽  
Ali Reza Yousefi
Keyword(s):  
Growth Performance ◽  
Meat Quality ◽  
Conversion Efficiency ◽  
Shear Force ◽  
Carcass Composition ◽  
Feed Conversion ◽  
Feed Conversion Efficiency ◽  
Mild Hypothyroidism ◽  
Plasma Triiodothyronine

The aim of the present study was to investigate the effects of induction hypothyroidism by propylthiouracil (PTU) on the growth performance and meat quality of fat-tailed Lori-Bakhtiari lambs. Eighteen Lori-Bakhtiari male lambs were randomly assigned to one of three groups (n = 6) and received daily treatments (gavage) consisting of 0 (Control: C), 10 (Low: L) or 20 (High: H) mg PTU/kg bodyweight/day for 60 days. PTU decreased plasma triiodothyronine and thyroxine concentration in both L and H (P < 0.0001). Lambs treated with PTU (L and H) had lower feed intake (P < 0.004), feed conversion efficiency (P < 0.003), and greater intramuscular fat than C lambs (P < 0.035). Meat from the L and H lambs had lower cooking loss and shear force, and also higher L* (lightness) than C lambs (P < 0.004, P < 0.015 and P < 0.025, respectively). The meat of H and L lambs was more tender than C lambs (P < 0.032). However, the meat of H lambs required fewer chews before swallowing than C lambs (P < 0.041). Generally, induction of mild hypothyroidism appeared to improve feed conversion efficiency and meat quality of lambs.

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