Factors associated with consumer perception and conduct toward certified beef from Brazil.

The aims of this study were to establish a relationship between consumers' socioeconomic aspects, key meat attributes, and consumer perception and conduct toward traced beef in Brazil. The authors applied a structured form in 52 supermarkets in eight Brazilian cities, through interviews with 2.949 consumers, in 2012. Federal or state inspection stamp was the attribute that most influenced the consumers' purchase decision (14.1%). Most of the interviewees (57.3%) had never heard about bovine traceability. Among those who had heard about bovine traceability, 63.2% would be willing to pay more for beef with certified origin. Consumers with higher education and income had a better knowledge about this type of certification, as well as older consumers, and therefore they would be willing to pay more for certified beef. This research suggests that educational level was the reason that most influenced Brazilian consumers during beef purchase.

Fatores associados à percepção e atitude de consumidores de carne bovina com certificação de origem em campinas, sp

O objetivo deste estudo foi verificar quais fatores socioeconômicos estão relacionados àdecisão de compra de carne com certificação de origem, além de levantar o perfil depercepção e atitude dos consumidores de carne bovina em Campinas, SP. Foi realizada adescrição das variáveis e construído um modelo múltiplo Generalized Estimating Equations(GEE) de regressão logística visando identificar possíveis associações entre as característicassocioeconômicas dos consumidores e os principais atributos da carne que influenciam adecisão para sua compra, levantadas por meio de entrevistas entre 281 entrevistados no mêsde abril de 2012. O estabelecimento comercial onde foi realizada a aquisição da carne é oatributo que mais influencia a decisão de compra dos consumidores. A maioria dosentrevistados já ouviu falar sobre rastreabilidade bovina. Dentre os que já ouviram falar emrastreabilidade bovina, a maior parte está disposta a pagar mais pela carne com certificação deorigem, apesar de considerar que há desvantagens associadas à rastreabilidade, principalmenteem relação ao aumento no preço da carne. Consumidores com maior grau de escolaridade erenda apresentaram melhor conhecimento sobre este tipo de certificação, sendo estes fatoresde grande influência sobre a aceitabilidade dos consumidores em pagar mais caro pela carnebovina rastreada.

Adjustment of non-linear models for growth in Morada Nova sheep breed / Ajuste de modelos não lineares para o crescimento em ovinos da raça Morada Nova

Performance evaluation of adapted animals to local conditions for economic traits is essential for the preservation of species and their genetic resources. The size of Morada Nova breed herds have decreased over time, becoming restricted to a few regions. Other races have been used with higher frequency because of their production and adaptation, and are important as a source of food and income for local communities. The objective of this research was to evaluate the application of nonlinear models to describe the growth curve of Morada Nova sheep. Records of 1604 weights of 250 lambs from Nova Odessa municipality, being 934 repeated measurements of female and 670 repeated measurements of male, obtained between 2012-2013 were used. The average birth weight observed was 2.50 ± 0.690 kg. The nonlinear models used to adjust the data were Brody Yt = A (1 - be-kt); Von Bertalanffy Yt = A (1 - be-kt)3; Richards Yt = A (1 - be-kt)m; Logistic Yt = A (1 + e-kt)-m and Gompertz Yt = Ae -be(-kt). The models were fitted by Gauss-Newton using the NLIN procedure of SAS (SAS Inst., Inc., Cary, NC). The parameters that make up the functions are Y = body weight at the age t; A = asymptotic weight that represents the average adulthood weight; K = Maturation rate, an indicator of the speed with which the animal approaches its adult size, maturity of the individual in relation to age is the fractio

O artigo não apresenta resumo em português.

Adjustment of non-linear models for growth in Morada Nova sheep breed / Ajuste de modelos não lineares para o crescimento em ovinos da raça Morada Nova

Performance evaluation of adapted animals to local conditions for economic traits is essential for the preservation of species and their genetic resources. The size of Morada Nova breed herds have decreased over time, becoming restricted to a few regions. Other races have been used with higher frequency because of their production and adaptation, and are important as a source of food and income for local communities. The objective of this research was to evaluate the application of nonlinear models to describe the growth curve of Morada Nova sheep. Records of 1604 weights of 250 lambs from Nova Odessa municipality, being 934 repeated measurements of female and 670 repeated measurements of male, obtained between 2012-2013 were used. The average birth weight observed was 2.50 ± 0.690 kg. The nonlinear models used to adjust the data were Brody Yt = A (1 - be-kt); Von Bertalanffy Yt = A (1 - be-kt)3; Richards Yt = A (1 - be-kt)m; Logistic Yt = A (1 + e-kt)-m and Gompertz Yt = Ae -be(-kt). The models were fitted by Gauss-Newton using the NLIN procedure of SAS (SAS Inst., Inc., Cary, NC). The parameters that make up the functions are Y = body weight at the age t; A = asymptotic weight that represents the average adulthood weight; K = Maturation rate, an indicator of the speed with which the animal approaches its adult size, maturity of the individual in relation to age is the fractio

O artigo não apresenta resumo em português.