Biological and economic performance of feedlot lambs feeding on diets with different energy densities

Sousa²,

et al. 2018

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SUMMARY This study aimed to evaluate the bio-economic performance in confinement crossbred goats from different genetic groups. Were used 30 goats, crossbred (F1) intact male, 10 goats Boer x SPRD (undefined breed), 10 x Savannah SPRD and 10 Oberhasli x SPRD, with an average weight of 15 kg and an average age of 100 days. The initial weight was evaluated, final body weight, average daily gain, total weight gain, dry matter intake, water intake, feed conversion and days on feed. As an economic indicator was calculated gross profit margin (MB), the average dry matter intake, the confinement period, the cost of each diet and the cost of vaccines and medicines. We used the 5% Tukey test for comparisons between treatment means. For the variables weight gain, dry matter intake, water intake and body condition score averages observed did not differ between the genetic groups. There was significant effect (P> 0.05) of genetic groups on days on feed. The biological performance of the goats finished in feedlot was not influenced by genetic group. In bioeconomic analysis was no significant difference (P> 0.05) between the evaluated racial groups. Gross profit margin was negative for the mestizos Pardo Alpine x SPRD. The cross between the Boer breed and without defined breed results in premature animals, reaching slaughter weights with reduced confinement period. In the feedlot finishing system crossbred Boer goats x SPRD showed better economic performance, providing greater profitability to the creator.

Section: Resultssupporting

confidence: 90%

Section: Resultssupporting

confidence: 83%

Productive and economic performance of goats of different genetic groups

Sousa²,

et al. 2018

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“…PFS and marbling were similar among the genotypes (Table 5). Finishing was greater in cross Dorper sheep (3.55), indicating that breeding with animals specialized in meat production improves fat cover scores, which was observed by Sousa et al (2012), when they studied the Santa Inês, F1 Dorper x Santa Inês, and F1 Santa Inês x MB genotypes, and reported that Dorper x Santa Inês products showed greater fat cover scores. This finding was also confirmed by Álvarez et al (2013), in a study with different sheep genotypes.…”

Section: Resultsmentioning

confidence: 81%

Carcass muscularity and adiposity of different sheep and goat genotypes

Ferreira

Cézar

Filho

et al. 2015

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SUMMARY Carcass muscularity and adiposity of different goat and sheep genotypes grazing in the Caatinga rangeland were evaluated. A total of 40 uncastrated males, with an initial average age and body weight of 120 days and 18.76 kg, respectively, were used: 10 mixed breed goats (MB), 10 cross Boer goats (½ Boer x ½ MB), 10 MB sheep and 10 cross Dorper sheep (½ Dorper x ½ MB). The cross Dorper had higher mean scores for rib eye area, leg muscularity index, weight of total muscles of the leg and conformation compared to MB goats. There was no significant difference between genotypes for the meat texture. Meat color was darker for goat genotypes than for sheep genotypes. The quantitative aspects of carcass adiposity, renal fat, inguinal fat, and subcutaneous and total leg fat showed to be higher for sheep than for goat genotypes. Carcass finishing and leg compactness index were superior for the cross Dorper genotype. Carcass muscularity and adiposity were better in sheep than in goat genotypes, indicating that sheep have a greater muscle and fat tissue development, giving to them a greater potential for beef production.

“…CV = coeficiente de variação; P = probabilidade. Cartaxo et al (2008) e Sousa et al (2012) avaliando o desempenho bioeconômico de cordeiros terminados em confinamento, observaram menor margem bruta de lucro para os animais mestiços SRD quando comparados com os mestiços com raça especializada para corte. Da mesma forma do presente estudo os animais mestiços com raça especializada para corte obtiveram os maiores resultados.…”

Section: Resultsunclassified

Desempenho bioeconômico de cabritos de diferentes grupos genéticos terminados em confinamento

Cartaxo

Leite

Sousa³

et al. 2013

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Objetivou-se avaliar o desempenho e margem bruta de lucro de cabritos de diferentes grupos genéticos terminados em confinamento. Foram utilizados 30 cabritos não castrados, sendo 10 ½ Anglo Nubiana × ½ Sem Raça Definida, 10 ½ Boer × ½ Sem Raça Definida e 10 Sem Raça Definida, alimentados com dieta contendo 15,5% de proteína bruta e 2,58Mcal de energia metabolizável por quilograma de matéria seca. Os cabritos Boer × Sem Raça Definida (SRD) apresentaram maiores consumos de matéria seca, em percentual do peso vivo, em relação aos SRD, tendo obtido os Anglo Nubiana × SRD resultados semelhantes aos demais grupos genéticos. Os consumos de água, a conversão alimentar e o escore corporal ao final do confinamento não foram influenciados pelo grupo genético. No entanto, houve efeito significativo do grupo genético sobre o ganho de peso total e ganho de peso médio diário, que foram maiores para os cabritos Boer × SRD em comparação aos SRD. Os cabritos Anglo Nubiana × SRD e SRD obtiveram maiores escores corporais no início do experimento quando comparados com os Boer × SRD. A utilização da raça Boer no cruzamento melhora o desempenho dos cabritos SRD. Os cabritos Boer × SRD, terminados em confinamento, apresentam maior margem bruta de lucro em comparação aos Anglo Nubiana × SRD.