Resumo
This study evaluated the semen quality of Santa Ines sheep fed diets containing different levels of whole cottonseed (WCS). Twenty sheep were distributed into four groups that were given diets with 0; 20; 30; 40% of WCS. For this study the semen was collected by electroejaculation, and a monthly andrological examination was performed during nine months. The analyzed variables were: scrotal circumference (SC), appearance and color of the ejaculate, progressive motility (PM), vigor, mass movement (MM), total sperm concentration (spzX109), sperm morphology (SM) and blood hematocrit. The SC had no difference among diets, with mean 31.83 cm. The animals fed diets with WCS, presented mean intake of 9.16 mg gossypol kg BW, and were prone to present greenish semen, and appearance ranging from thin creamy to watery. The PM decreased linearly (p 0.05) with increasing level of WCS, while the vigor had a quadratic trend. The total defects increased linearly in relation to reference values described in literature. The WSC had no influence on hematocrit levels, but did affect the PM and vigor of spermatozoa, thus not recommended to diets of animals for breeding.
Resumo
The performance and qualitative carcass traits of Santa Inês and crossbred Dorper × Santa Inês lambs finished in feedlot with different body conditions were evaluated. Forty-eight lambs averaging 20.0 kg of body weight and 103 days old and 32 lambs, 16 from each genotype, were used respectively for the evaluation of qualitative carcass traits and performance. Dorper Santa Inês lambs presented lower dry matter intake and better feed conversion in the intermediate body condition when compared to Santa Inês. Body condition affected dry matter intake and feed conversion of crossbred lambs. Dorper Santa Inês lambs had better carcass conformation and higher subcutaneous fat thickness when slaughtered at high body condition in relation to the intermediate one, while Santa Inês lambs were similar in both body conditions.
Objetivou-se avaliar o desempenho e as características qualitativas de carcaça de cordeiros Santa Inês e mestiços Dorper × Santa Inês terminados em confinamento com diferentes condições corporais. Na avaliação das características qualitativas de carcaça, utilizaram-se 48 cordeiros não-castrados, com 103 dias de idade e peso médio de 20,0 kg, (24 da raça Santa Inês e 24 mestiços ½ Dorper × ½ Santa Inês), enquanto, na avaliação do desempenho, utilizaram-se 32 cordeiros, 16 de cada genótipo. Na condição corporal intermediária, os cordeiros mestiços Dorper × Santa Inês apresentaram menor consumo de matéria seca e melhor conversão alimentar, em comparação aos Santa Inês. A condição corporal influenciou o consumo de matéria seca e a conversão alimentar dos cordeiros mestiços. Os cordeiros mestiços Dorper × Santa Inês apresentaram melhor conformação e maior espessura de gordura subcutânea quando abatidos na condição corporal gorda em relação à intermediária, enquanto os cordeiros Santa Inês foram semelhantes nessas duas condições corporais.
Resumo
This study evaluated the semen quality of Santa Ines sheep fed diets containing different levels of whole cottonseed (WCS). Twenty sheep were distributed into four groups that were given diets with 0; 20; 30; 40% of WCS. For this study the semen was collected by electroejaculation, and a monthly andrological examination was performed during nine months. The analyzed variables were: scrotal circumference (SC), appearance and color of the ejaculate, progressive motility (PM), vigor, mass movement (MM), total sperm concentration (spzX109), sperm morphology (SM) and blood hematocrit. The SC had no difference among diets, with mean 31.83 cm. The animals fed diets with WCS, presented mean intake of 9.16 mg gossypol kg BW, and were prone to present greenish semen, and appearance ranging from thin creamy to watery. The PM decreased linearly (p 0.05) with increasing level of WCS, while the vigor had a quadratic trend. The total defects increased linearly in relation to reference values described in literature. The WSC had no influence on hematocrit levels, but did affect the PM and vigor of spermatozoa, thus not recommended to diets of animals for breeding.
Resumo
The performance and qualitative carcass traits of Santa Inês and crossbred Dorper × Santa Inês lambs finished in feedlot with different body conditions were evaluated. Forty-eight lambs averaging 20.0 kg of body weight and 103 days old and 32 lambs, 16 from each genotype, were used respectively for the evaluation of qualitative carcass traits and performance. Dorper Santa Inês lambs presented lower dry matter intake and better feed conversion in the intermediate body condition when compared to Santa Inês. Body condition affected dry matter intake and feed conversion of crossbred lambs. Dorper Santa Inês lambs had better carcass conformation and higher subcutaneous fat thickness when slaughtered at high body condition in relation to the intermediate one, while Santa Inês lambs were similar in both body conditions.
Objetivou-se avaliar o desempenho e as características qualitativas de carcaça de cordeiros Santa Inês e mestiços Dorper × Santa Inês terminados em confinamento com diferentes condições corporais. Na avaliação das características qualitativas de carcaça, utilizaram-se 48 cordeiros não-castrados, com 103 dias de idade e peso médio de 20,0 kg, (24 da raça Santa Inês e 24 mestiços ½ Dorper × ½ Santa Inês), enquanto, na avaliação do desempenho, utilizaram-se 32 cordeiros, 16 de cada genótipo. Na condição corporal intermediária, os cordeiros mestiços Dorper × Santa Inês apresentaram menor consumo de matéria seca e melhor conversão alimentar, em comparação aos Santa Inês. A condição corporal influenciou o consumo de matéria seca e a conversão alimentar dos cordeiros mestiços. Os cordeiros mestiços Dorper × Santa Inês apresentaram melhor conformação e maior espessura de gordura subcutânea quando abatidos na condição corporal gorda em relação à intermediária, enquanto os cordeiros Santa Inês foram semelhantes nessas duas condições corporais.