Effect of breed, sex and litter size on growth and meatiness and fattiness in vivo in lambs

The aim of this work was to evaluate the effect of birth weight on the survival of Charollais, Kent and their crossbreds in breeding and also on their meat performance for Charollais and Kent lambs. Data were evaluated for the six years period in the commercial flock. The total number of lambs used for evaluation was 1,197. The data were passed through the SAS STAT program using the MIXED method. In the model equation, all the dependent variables of the survival indicator were significantly statistically detectable with a significance level of P < 0.01. The results indicated that survivability lambs was significantly influenced by birth weight and litter size (P < 0.05). Meat performance of lambs was affected the most combined year and month, breed and litter size (P < 0.05). The results suggest better survivability abilities for the crossbred than the pure-bred population. Despite the lack of meat performance data, it is interesting to consider a possible selection program for the breeds, Charollais and Kent, to improve the survival of lambs for extending extensive farming methods. However, also by improving flock management we will achieve better survivability results for lambs.

Section: Growth Analysissupporting

confidence: 87%

Factors Determining Survivability Traits of Charollais, Kent Lambs, and their Crossbreds During Rearing

Málková¹,

Ptáček²,

Stádník³

et al. 2020

“…In addition, FLs of the present study had also the lower BW0 compared to MLs which is consistent with the finding of Taskin et al (2012). In contrast, Hošek et al (2008) found the higher BW0 in FLs. It is interesting, that EL in FLs of the present study, compared to MLs, was positively correlated (P < 0.05) with DGs from birth to 100 days of age and from birth to the slaughter.…”

Section: Resultsmentioning

confidence: 67%

“…The evaluation of BCS was carried out by the same person according to Russel et al (1969), on a 1-5 scale (BCS 1 = emaciaded, BCS 5 = obese). The ultrasound measurements (UMs) of DMLLT and TBF were carried out by the same person according to Hošek et al (2008).…”

Section: Methodsmentioning

confidence: 99%

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

Kuchtík¹,

Konečná²,

Šeligová³

et al. 2020

Self Cite

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.

“…Growth intensity of lambs before weaning and after weaning significantly affects the economics of farming (Petr et al, 2009;Pajor et al, 2008;2009a;Wolfová et al, 2009;Komprda et al, 2012;Svitáková et al, 2014;Koutná et al, 2016). The growth is affected by many factors where the most important are the breed, nutrition, sex, litter size, management, biotic stress, health and age of mothers (Kuchtík and Horák, 2007;Dobeš et al, 2007;Hošek et al, 2008;Pajor et al, 2007;2009b;Kuchtík et al, 2010;Zapletal et al, 2010;Štolc et al, 2011;Ptáček et al, 2013;Lupi et al, 2015;Waheed et al, 2015;Aguirre Riofrio et al, 2016;Mellado et al, 2016;Moreira et al, 2016;Sieklicki et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Growth Curves in Lambs of Various Genotypes Created on the Basis of Improved Valachian and Tsigai Breeds

Makovický

Margetín

Nagy

et al. 2017

Changes in live weight or dimension for a period of time are explained by growth curves. The objective of this work was to evaluate the growth curves in lambs of 6 (1 st experimental group) and/or 5 genotypes (2 nd group) created on the basis of Improved Valachian (IV) and Tsigai (T) breed. All lambs (n = 209 and 205) were kept from birth to 9 months of age in identical conditions. Lambs of both experimental groups were weighed at birth and then every week until weaning (8 weightings totally). After weaning only breeding ewe and ram lambs were weighed (6 times totally). The growth of lambs created on the basis of IV a T breeds showed linear course till weaning expressed in regression equation y = 0.2659x + 5.352 and y = 0.2404x + 4.7364 respectively (R 2 = 0.985 and/or 0.9954; x -day of raising). Weight differences between genotypes grew after weaning. The average weight of lambs at the age of 150 days was 40.15 kg in the 1 st group and 38.31 kg in the 2 nd group respectively. The lowest weight was in purebred IV (38.13 kg) a T lambs (34.98 kg) and the highest in the purebred Lacaune lambs (43.82 kg and/or 44.29 kg). Differences between genotypes were statistically highly significant (P < 0.001). The differences among genotypes were even more marked at the age of 9 months. Growth of lambs from birth to the age of 9 months can be expressed in the best way by means of polynomic equation (R 2 = 0.99 in both experimental groups).