Bobot Potong, Persentase Karkas Semu dan Index Konformasi Karkas Domba Lokal Pada Penggemukan yang Diberi Pakan Berbasis Indigofera Sp

The aims of this study were to examine the slaughter weight, the percentage of apparent carcasses and the conformation index of carcasses of local sheep fed indigofera sp. as a substitute for commercial concentrates with different levels. The research method was an experiment with a Completely Randomized Design (CRD). The experiment was in vivo in 18 sheep fed different level of indigofera sp, P0 treatment being a basal ration as a control consisting of concentrate (K) and elephant grass (RG) with a ratio of 80: 20%. P1 was 40% K: 40% indigofera: 20% RG, and P2 was 30% K: 50% indigofera: 20% RG. Each treament was repeated 6 times. Sheep were offered feed 4% of body weight on dry matter basis. slaughter weight data were analyzed using Ancova, SPSS program version 16 with initial body weight as covariate. Apparent carcass percentage data and carcass conformation index were analyzed with anava. The results of covariance analysis showed no significant difference (P > 0.05) amongst treatments. The average initial body weights of P0, P1 and P2 were 9.58 ± 1.68, 10.58 ± 3.09 and 9.28 ± 1.91 kg, respectively. after receiving treatment for 70 days the slaughter weights for P0, P1 and P2 were 15.57 ± 3.64, 13.58 ± 2.76, 12.58 ± 1.65 kg, respectively. The average consumption of dry matter for P0, P1 and P2 were 400.19 g / head / day, 401.20 g / head / day and 398.59 g / head / day, repectively. The average percentage of apparent carcasses for P0: 40.61 ± 2.43%; P1: 34.33 ± 0.63% and P2: 34.03 ± 4.61%. Average carcass conformation index for P0: 0.47 ± 0.04; P1: 0.43 ± 0.01 and P2: 0.43 ± 0.01. Indigofera sp had no significant effect (P> 0.05) on the percentage of apparent carcass and carcass conformation index. In Conclusion, indigofera sp. does not decrease local sheep productivity and can be used to replace concentrates as a source of protein. Keywords: Apparent carcass percentage; Index of carcass conformation; Indigofera sp.; Local sheep; Slaughter weight. Abstrak Penelitian bertujuan mengkaji bobot potong, persentase karkas semu dan index konformasi karkas domba lokal yang diberi Indigofera sp. sebagai pengganti konsentrat komersial dengan level yang berbeda. Metode penelitian adalah eksperimental. Rancangan yang digunakan adalah Rancangan Acak Lengkap (RAL). Penelitian berlangsung secara in vivo pada domba sebanyak 18 ekor, dengan perlakuan P0 adalah ransum basal sebagai kontrol yang terdiri dari konsentrat (K) dan rumput gajah (RG) dengan perbandingan 80%: 20%. P1 adalah 40% K: 40% indigofera: 20% RG, dan P2 adalah 30%K: 50% indigofera: 20%RG. Masing2 perlakuan diulang 6 kali. Pemberian pakan sebesar 4% bobot badan berdasarkan bahan kering. Data bobot potong dianalisis dengan Ancova, program SPSS versi 16 dengan bobot badan awal sebagai covariat. Data persentase karkas semu dan index konformasi karkas dianalisis dengan anava. Hasil analisis covariansi menunjukkan tidak berbeda nyata (P>0,05) antar perlakuan. Rataan bobot badan awal P0, P1 dan P2 masing-masing adalah 9,58±1,68, 10,58±3,09 dan 9,28±1,91 kg, setelah mendapatkan perlakuan selama 70 hari bobot potong untuk P0, P1 dan P2 berturut-turut 15,57±3,64, 13,58±2,76 dan 12,58±1,65 kg. Rataan konsumsi bahan kering P0, P1 dan P2 berturut-turut adalah: 400,19g/ek/hr, 401,20g/ek/hr dan 398,59g/ek/hr Rataan persentase karkas semu pada P0: 40,61±2,43%, P1: 34,33±0,63% dan P2: 34,03±4,61%. Rataan index konformasi karkas untuk P0: 0,47±0,04, P1: 0,43±0,01 dan P2: 0,43±0,01. Pemberian Indigofera sp tidak berpengaruh nyata (P>0,05) terhadap persentase karkas semu maupun index konformasi karkas. Kesimpulan Indigofera sp. tidak menurunkan produktivitas ternak domba lokal, dan dapat digunakan untuk menggantikan konsentrat sebagai bahan sumber protein. Kata kunci: Bobot potong; Domba lokal; Index konformasi karkas; Indigofera sp.; Persentase karkas semu

Characteristics of carcass and non-carcass components of lambs fed wet brewery waste as a roughage feed

The objective of the present study was to evaluate the effect of including wet brewery waste (WBW) as the exclusive dietary roughage source on the characteristics of carcass and non-carcass components of feedlot-finished lambs. Thirty-two non-castrated male lambs weaned at 50 days of age, resulting from the cross between the Texel and Ile de France breeds, were used. The diet was constituted by roughage (WBW) and a concentrate composed of crushed maize, soybean meal, limestone and common salt. Treatments consisted of four levels of WBW as the roughage source in the diet (% dry matter), namely, 31, 44, 57 and 70%. Lambs were slaughtered upon reaching 34 kg live weight. The treatments resulted in a linear decrease in hot and cold carcass weights and yields, carcass compactness index, conformation, degree of fatness and rib-eye area. Among the primal cuts, the absolute weights of pallet, ribs and legs decreased as the WBW level was increased. As to the non-carcass components, only the total gastrointestinal content increased linearly with WBW. The increasing levels of WBW led to greater fasting losses and reduced carcass weights and yields. There was also a reduction in the degree of fatness, carcass compactness, carcass conformation index and rib-eye area Wet brewery waste at the concentration of 31% as the roughage source in the diet of finishing lambs in the feedlot provides better carcass traits.

Comparative Physical Characteristics in the Indigenous Nigerian and Imported European Pigs

THE Physical carcass characteristics of 100 indigenous Nigerian pigs (IND.) (50 gilts and 50 barrows), and 100 Large White x Landrace pigs with a similar sex ratio were compared. These were slaughtered at either one of five weights, 22.7, 34.0, 45.5, 56.8 or 68 kg live weight, in such a way that 10 gilts and 10 barrows of each breed were slaughtered at each of the predetermined slaughter weights. For the purpose of comparing sexual influences on physical carcass traits in the indigenous pigs carcass data were obtained on an additional group of 50 indigenous boars during the same period as the above it similar Slaughter weights involving similar numbers per slaughter weight. In a third experiment carcass data were collected on 40 pure Large White pigs (LW) (20 gilts and 20 barroWs) and 40 indigenous x Large White pigs (IND.XLW) also made up of 20 gilts and 20 barrows. A comparison was made between these and the data on a similar number of indigenous barrows and gilts. The results indicated highly significantly different (P <0.01). Proportions of lean and fat and significantly (P <0.05) different proportions of bone and skin in the carcasses of IND and LWXLD pig. The LWXLD pigs had more lean, and bone, less fat and skin, than the indigenous pigs. Carcass conformation was also clearly different in both breeds. The indigenous pigs had lower proportion of lean cuts and greater proportion of the fat cuts than the LWXLD pigs at all Slaughter weights. From 22.7 to 68 kg slaughter weights, the IND pigs were shorter, had thicker backfat, higher dressing percentage and smaller loin eye muscle area compared to the LWXLD pigs. Percentages lean, bone skin, ham, loin, shoulder and sum of four lean cuts decreased while percentages fat, fat cuts, trimmed fat and backfat thickness increased with increasing slaughter weights for both breeds. A comparison of carcass traits in the indigenous boars, barrows and gilts showed that the boars were leaner and had superior carcass conformation to the gilts which in turn were leaner than barrows. Crosses between the indigenous pigs and pure large White pigs were superior to the pure indigenous pigs in terms of carcass length, greater proportion of lean to fat and thinner backfat measurements, while they were inferior to the Pure Large White pigs in terms of these measurements.

45 Effect of terminal sire breed on grazing performance, parasitism, and market grade of crossbred lambs: year 2

Improvements in growth and carcass conformation through terminal sire crossbreeding systems may improve lamb value in a pasture-based system. Therefore, the aim of this study was to replicate the previous model of this experiment and compare the effects of different terminal sires on parasitism, growth, composition and marketability of grazing lambs and lambs at weaning. Suffolk SU (n = 2) and Texel TX (n = 3) sires were mated to commercial ewes at the WVU Organic Farm. April-born lambs were managed as one group until weaning in mid-June. One group containing TX (n = 28) and SU (n = 22) was sold at weaning, the other group was sorted into 3 replicates per sire breed. Lambs were rotationally grazed for 62-d with paddock movements every 10-d. Lambs were supplemented at a rate of 2% of bodyweight with a 16% CP corn-soybean meal supplement. Weights and FAMACHA were collected at weaning and then weekly for the duration of the study. Fecal egg counts (FEC) and packed cell volumes (PCV) were collected bi-weekly. Lambs were dewormed when FAMACHA score was a 3 or greater. Ultrasound measures of rib eye area (REA) and fat depth were obtained at study conclusion and lambs were marketed at the same graded auction as the group sold at weaning. There was no significant difference in FEC and PCV data values during project duration (P = 0.32) (P = 0.19). Fewer deworming treatments were necessary in TX-sired lambs at 19% (7/36) whereas SU-sired lambs required 42% (15/36) (P = 0.04). REA and fat depth measurements were not significant between sired breeds (P = 0.21) (P = 0.50). Texel-sired lambs received a $0.26/Kg greater premium than the SU-sired lambs at weaning. Texel-sired lambs received a $0.29/Kg greater premium than the SU-sired lambs after the conclusion of grazing. These data demonstrate that Texel-sired lambs required fewer dewormer treatments and received premiums when marketed at a graded auction.

The impact of environmental factors on the occurrence of DFD-type of beef in commercial abattoirs

The aim of the study was to analyse the causes of increased beef pH value measured 36-hours after slaughter (pH ≥ 5.8) taking into account the cattle type and the slaughter season. The pH36 data were collected on 235,555 and 237,563 animals in the season one and season two, respectively, harvested at two commercial abattoirs. The following sets of interactions were significantly associated with the incidence of pH36 >5.80: cattle type x cattle breed; cattle type x ante-mortem resting time; cattle type x hot carcass weight, cattle type x carcass conformation class and cattle type x fat cover class. During the entire period under analysis the overall incidence of pH ≥ 5.8 was 10.89%. In 2017 and 2018 pH ≥ 5.8 amounted to 12.25% and 9.47%, respectively. The type and breed of cattle type and the slaughter season also impacted the following beef production parameters: live weight, hot carcass weight, carcass dressing yield percentage and the carcass conformation and fat cover classes in EUROP classification.

Feed and production efficiency of young crossbred beef cattle stratified on a terminal total merit index1

Few studies have attempted to quantify the association between a terminal total merit index with phenotypic feed and production efficiency in beef cattle, particularly when feed efficiency is itself explicitly absent as a goal trait in the index. The objective of the present study was to quantify the differences in phenotypic performance for feed intake, feed efficiency, and carcass traits of crossbred bulls, steers, and heifers differing in a terminal total merit index. A validation population of 614 bulls, steers, and heifers that were evaluated for feed intake and efficiency in the same feedlot and subsequently slaughtered at the end of their test period was constructed. The Irish national genetic evaluations for a terminal index of calving performance, docility, feed intake, and carcass traits were undertaken with the phenotypic records of animals present in the validation population masked. The validation population animals were subsequently stratified into four groups, within sex, according to their terminal index value. Mixed models were used to quantify the association between terminal genetic merit and phenotypic performance; whether the associations differed by sex were also investigated. The regression coefficient of phenotypic feed intake, carcass weight, carcass conformation, or carcass fat on its respective estimated breeding values was 0.86 kg dry matter 0.91 kg, 1.01 units, and 1.29 units, respectively, which are close to the expectation of one. On average, cattle in the very high terminal index stratum had a 0.63 kg DM/d lower feed intake, a 25.05 kg heavier carcass, a 1.82 unit better carcass conformation (scale 1 to 15), and a 1.24 unit less carcass fat score (scale 1 to 15), relative to cattle in the very low terminal index stratum. Cattle of superior total genetic merit were also more feed efficient (i.e., had a lower energy conversion ratio, lower residual feed intake, and greater residual gain), had a greater proportion of their live-weight as carcass weight (i.e., better dressing percentage) and were slaughtered at a younger age relative to their inferior total genetic merit counterparts. This study provides validation of an all-encompassing total merit index and demonstrates the benefits of selection on a total merit index for feed and production efficiency, which should impart confidence among stakeholders in the contribution of genetic selection to simultaneous improvements in individual animal performance and efficiency.

Effect of Gender on Growth and Carcass Traits of Romney Marsh Lambs

The aim of present study was to assess the effect of the gender on growth and carcass traits in lambs of the Romney Marsh breed. The experimental animals were male lambs (n = 12) and female lambs (n = 12) of the Romney Marsh breed. All lambs were twins and all their mothers were on the second parity. With regard to body weights and daily gains (DGs), the gender had a significant effect only on birth weight and DG from birth to the slaughter, while in all monitored intervals the DGs were higher in male lambs (MLs). The lamb gender did not have a significant effect on the easy of lambing, body condition score, depth of musculus longissimus lumborum et thoracis (DMLLT) and thickness of backfat (TBF). However, values for DMLLT and TBF were higher in female lambs (FLs), which in case of DMLLT was not expected. Regarding the carcass traits, the gender had a significant effect only on the weights of kidney, kidney fat, leg and shoulder and on the proportions of kidney fat and shoulder. Interestingly, the gender had no significant effect on the conformation and fatness, while slightly better carcass conformation and slightly higher fatness were found in FLs. It can be concluded that FLs of the Romney Marsh breed showed comparable values for both the growth and carcass traits with MLs. Moreover, a slightly higher fatness of FLs is a prerequisite for better juiciness and tenderness of their meat, when this fact can be considered as a benefit in the marketing.

133 Effect of terminal sire breed on grazing performance, parasitism and market grade of crossbred lambs

Improvements in growth and carcass conformation through terminal sire crossbreeding systems may improve lamb value in a pasture-based system. Therefore, the aim of this study was to compare the effects of different terminal sires on parasitism, growth, composition, and marketability of grazing lambs. Suffolk (SU; n = 2) and Texel (TX; n = 2) sires were mated to commercial ewes at the WVU Organic Farm. April-born lambs were managed on pasture as one group until weaning in midJune, then were separated into 3 replicates per sire breed. Lambs were rotationally grazed for 93 d with paddock movement every 10 d. Lambs were supplemented at a rate of 2% of bodyweight with a 16% CP corn-soybean meal supplement. Weights were collected at weaning and then weekly for the duration of the study. Fecal egg counts (FEC) and FAMACHA scores were collected biweekly. Lambs were de-wormed when FAMACHA score was ≥ 3. Ultrasound measures of rib eye area (REA) were obtained at study conclusion and lambs were marketed at a graded auction. Sire breed did not impact weaning weight or growth rate throughout the test. Fecal egg count was slightly higher in TX vs. SU-sired lambs (257 vs 191 eggs/g; P < 0.05). FAMACHA scores were lower in TX vs. SU-sired lambs (1.58 vs. 1.96; P < 0.0001). Fewer deworming treatments were necessary in TX-sired lambs at 10% (4/39) whereas as SU-sired lambs required 55% (22/40) (P < 0.0001). TX-sired lambs had greater REA (11.57 vs 9.42 cm2; P < 0.0001) and graded better at the saleyard. Grading was set to a 6 pt scale with higher equating to higher sale price. Lambs sired by TX rams graded 5.2 and SU-sired lambs graded 3.6 (P < 0.0001). These data demonstrate that Texel-sired lambs required fewer dewormer treatments and were compositionally more desirable when marketed

Carcass characteristics of feedlot-finished Nellore heifers slaughtered at different weights

Carcass and meat characteristics of 48 Nellore heifers at 24 to 30 months of age, with an initial weight of 263.4 ± 13.9 kg, were evaluated. The experiment was set up as a completely randomized design with four treatments, which consisted of four slaughter-weight classes, namely <340, 340-370, 370-400, or >400 kg. Back fat thickness was not influenced (p > 0.05) by slaughter weight in any of the forms it was expressed (mm or %), averaging 5.3 mm. Loin eye area in cm2 increased (p < 0.05) with the increase in slaughter weight. Animals slaughtered at a live weight (LW) of more than 400 kg showed better (p < 0.05) carcass conformation than the other experimental groups (9.8 points). Heifers slaughtered at over 400 kg LW had a more compact (p < 0.05) carcass (1.65 cm kg-1 cold carcass). The marbling degree of meat was lower (p < 0.05) in the animals slaughtered at less than 340 kg LW. In conclusion, cull heifers must not be slaughtered at a LW of less than 340 kg and slaughter weights greater than 400 kg have positive implications on important carcass characteristics, notably conformation and marbling.

Effects of feeding systems and breed group on carcass characteristics and meat quality of feedlot goat kids

The goal was to evaluate if feeding systems with or without milk or breed groups can improve carcass characteristics, the proportion of tissues and meat tenderness of feedlot goat kids. Were used 56 animals from five different breed groups fed by experimental diet and milk according to the treatment., without milk or with 1,5 L milk/animal/day. The kid goats were slaughtered at 30 kg of live weight, and the carcass conformation and amount of fat were determined subjectively by visual assessment. Morphometric measurements and carcass and cut yields were performed. The Longissimus lumborum muscle was separated to determinate the area and subsequently it was used to evaluate the tenderness of the meat. The feeding system changes goat carcass characteristics, and goat kids fed milk until slaughter have better carcass yield and meat quality, as it anticipates the deposition of total fat, which can benefit carcass quality, given the scarcity of fat in the carcass of goats. The breed group also influences carcass characteristics. It is recommended the use of the Boer breed up to 3/4, since more than that it reduces leg yield and does not improve the compactness index and carcass conformation.