Aracele Prates de Oliveira

Pedigree analysis on the population of Gir cattle in Northeast Brazil

The objective of this study was to characterize the population genetic structure of the Gir breed in the Northeast of Brazil. The data used in this study were taken from pedigree information of 8,897 Gir animals between 1957 and 2007, obtained from the Brazilian Zebu Breeders Association (ABCZ). The program ENDOG was used to estimate the parameters based on the probability gene origin. From the amount of the studied animals, 67.22%, 18.41% and 3.15% had complete pedigree only on the first, second and third parentage, respectively. The number of ancestors that contributed for the reference population was 2,755, of which only 171 explain the 50% genetic variability of the population. The actual number of founder herds was 168 and the effective number of founder herds was 22.3. The number of sire supplier herds was 22.16, 8.66 and 5.36 for fathers, grandfathers and great-grandfathers, respectively. The average coefficient of relatedness was estimated at 0.22%; the highest individual coefficient was 1.49%. The little variability of the current population is a result of the small number of effective founders and ancestors indicating the population evolved from a narrow genetic base.

A raça Gir Mocha na região Nordeste do Brasil: estrutura genética populacional via análise de pedigree

In this study we used data from the 2558 pedigree cattle polled Gir born from 1954 to 2005. Analyses were performed using the Endog program. Of all animals studied, 61.86%, 10.56% and 0.10% had a pedigree in the first, second and third generation, respectively. The effective number of herds that provide breeding males was 10.25 for parents and 3.87 for grandparents, corroborating the low completeness of the pedigree. The number of founder animals was 975.5 and the effective number of founders were 141.34. The number of ancestors in the reference population was 924 animals from which only 39 accounted for 50% of the genetic variability of the population. The average relationship coefficient was estimated at 0.75%, the largest individual coefficient was 25%. The inbreeding coefficient was zero from 1954 to 1894. It is noteworthy that during this period included the population was low, but may be underestimated because of the small pedigree integrity.

Production and economic viability of feedlot beef cattle categories

This study was realized to evaluate the production and economic viability of finished beef cattle in feedlot in the Cerrado biome of Piauí State, Brazil. One hundred and fifty cattle -50 bulls (B) with an body weight of 283.0 ± 20.82 kg, at 30 months of age; and 100 cull cows (CC) with an body weight of 296.1 ± 17.80 kg, at 100 months of agewere used in a completely randomized design. The animal performance indicators for the evaluation of economic viability were initial age (months), slaughter age (months), was initial body weight (kg), final body weight (kg), daily feed intake (kg animal; kg kg BW), diet cost (R

Feeding behavior of categories of feedlot-finished beef cattle

kg of diet), cost of kg produced (R

Lambs production fed without roughage in different feed supply levels

kg produced), and average price of the kg of meat for finishing (R

Caracterização do consumidor de carne de frango em Júlio Borges-PI

). The CC consumed more sorghum silage and concentrate than B (p < 0.05).There was a difference between the categories (p < 0.05) for gross revenue, balance, opportunity cost, and net revenue per animal, with higher values found for the steer category. The animal category did not affect the profitability of the system, although the bulls provided lower revenues than cull cows.

Qualidade da carne de bovinos terminados em pastejo

An experiment was conducted to evaluate the feeding behavior of feedlot-finished bulls and cull cows in the Cerrado region of Piaui State, Brazil. Forty Zebu cattle were used, of which 20 steers averaging 283.0 ± 20.82 kg initial body weight and 30 months of age; and 20 cull cows averaging 296.1 ± 17.80 kg initial body weight and 100 months of age. Animals were grouped according to the following treatments: bulls and cull cows, using a completely randomized design. Feeding behavior was evaluated by means of visual observations every five minutes during 24h. Results were subjected to analysis of variance by the F test (p 0.05), showing that feeding behavior is influenced by the cattle category.

INFERÊNCIA BAYESIANA NA AVALIAÇÃO GENÉTICA DE BOVINOS DA RAÇA TABAPUÃ DO NORDESTE BRASILEIRO

This study aimed to evaluate the production of castrated Santa Ines ram lambs fed diets without roughages in different levels of feed supply. Fifty castrated Santa Ines male sheep with an average body weight of 20 kg and an average age of four months were used in the experiment. The following treatments were tested: FS100 - animals receiving a diet ad libitum ; FS95 - animals receiving 95% of the amount of feed supplied in FS100; FS90 - animals receiving 90% of the amount supplied in FS100; FS85 - animals receiving 85% of the amount supplied in FS100; and FS80 - animals receiving 80% of the amount supplied in FS100. A randomized complete design was adopted. From the 7th to the 10th day of each period, feed intake was quantified, and the apparent digestibility coefficients were estimated from the intake and fecal production. A marginal analysis of variation in the feed cost was performed. Results were analyzed statistically by ANOVA and regression at 0.05 probability level using SAS (version 9.2) software. The intake of feed and nutrients decreased linearly as the feed supply was reduced (P<0.05). The most attractive marginal rate of return was obtained with FS100, providing 1409%. The amount of feed supplied to feedlot ram lambs consuming diets without roughage changes their intake, causing variations in weight gain but not in the digestion of the feed. The decrease in the feed cost was not proportional to the variation in body weight, making the restricted levels of feed supply less attractive. DOI: 10.15528/2176-4158/rcpa.v17n2p122-128

PRINCIPAIS ASPECTOS CONSIDERADOS POR CONSUMIDORES NA AQUISIÇÃO E CONSUMO DE CARNE SUÍNA EM COLÔNIA DO PIAUÍ-PI

Objetivou-se com esta pesquisa diagnosticar as caracteristicas e o perfil do consumidor de carne de frango em Julio Borges/PI. Foram realizadas 100 entrevistas atraves de questionarios no mes de Janeiro de 2015 com consumidores de carne de frango em mercearias e residencias. O questionario era composto por perguntas relacionadas a caracterizacao e identificacao do perfil do consumidor, bem como perguntas voltadas a identificacao dos atributos considerados mais importantes pelos consumidores no momento da compra da carne de frango. Em relacao ao perfil socioeconomico, 79% dos consumidores sao do sexo feminino e 21% sao do sexo masculino. Destes, 61% possuem habito de consumir carne de frango semanalmente. Quanto a preferencia, optaram em primeiro lugar pela carne de aves e em segundo lugar pela carne bovina. Quando se trata da preferencia, 57% dos consumidores escolheram cortes de frango, em que o corte preferido foi o peito com 32%, e o modo de preparo mais utilizado pelos consumidores e assado (46%). A maioria dos consumidores 80% consideram a carne de peito de frango com menor nivel de colesterol e acreditam que a carne suina apresenta maior risco de transmitir doencas. Itens como embalagem, validade e preco foram considerados os de maior importância no ato da compra. Quanto aos aspectos sensoriais, o aroma, a cor, e a textura da carne foram os mais citados. O municipio de Julio Borges possui potencialidades para o mercado de carne de frango. Percebe- se uma tendencia pela compra de produtos com qualidade e nao apenas pelo preco. Os consumidores consideram a carne do peito do frango com menor nivel de calorias e colesterol, passando a consumir mais este corte mediante a preocupacao com a saude. DOI: 10.15528/2176-4158/rcpa.v17n2p129-141

Correlações lineares do comportamento ingestivo e digestibilidade aparente em borregos confinados

A carne bovina e uma importante fonte de proteina para alimentacao humana, e as exportacoes de carne contribuem significativamente com a balanca comercial brasileira. Entretanto, a conquista e consolidacao de novos mercados depende da compreensao que o consumidor tem da qualidade da carne. Com o consumidor mais consciente, o foco da qualidade da carne vem passando do produtor e da industria (peso da carcaca, rendimento de carcaca, etc.) para o consumidor, com avaliacao das caracteristicas organolepticas e valor nutricional. Apesar do confinamento de bovinos ter crescido nos ultimos anos, a terminacao a pasto e predominante no pais e o rebanho e composto basicamente por animais zebuinos. Esta modalidade de terminacao garante a carne caracteristicas qualitativas particulares, e embora animais terminados em pastejo apresentem carne menos macia e com menos marmoreio, tais caracteristicas podem ser melhoradas por meio do manejo nutricional e cruzamentos. Ja o valor nutritivo da carne tende a ser melhor em animais terminados em pastejo, apresentando menor teor de gordura, e com melhor perfil lipidico, com maior concentracao de acidos graxos insaturados, acido linoleico conjugado (CLA) e menor relacao Ω6:Ω3. Tais caracteristicas tornam a carne de animais produzidos em pastejo um alimento funcional, podendo ser trabalhado para agregar valor a carne brasileira, que podera atender a nichos especificos de mercado.