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1.
Animals (Basel) ; 13(12)2023 Jun 14.
Article in English | MEDLINE | ID: mdl-37370488

ABSTRACT

The aim of this study was to describe the morphology and estimate live weight from body measurements of Socorro Island Merino lambs. A group of Socorro Island Merino lambs was recorded from birth to year for live weight, rump width, rump length, withers height, body length, cannon bone perimeter, and chest girth, width, and depth. The effect of the lamb type on body measurements and live weight was analyzed using ANOVA, Pearson's correlation analysis was performed to estimate the relationship between body measurements and live weight, multiple linear regressions were fitted to obtain prediction equations of live weight from the body measurements and finally, chest girth was used to generate prediction equations using linear and exponential models. At birth and at year, differences were observed in body measurements, especially those related to the thoracic region, with crossbred males showing the highest values. Live weight was correlated with almost all the body measurements, with the highest coefficients observed with chest girth, chest width, and chest depth. Live weight can be accurately predicted from multiple regression equations using several body measurements, but using only chest girth (CG) as a predictor, the exponential equation W0-365 = 0.9142 exp(0.0462 CG) showed the best accuracy.

2.
Arq. bras. med. vet. zootec. (Online) ; 73(1): 261-264, Jan.-Feb. 2021. tab, graf
Article in English | LILACS, VETINDEX | ID: biblio-1153068

ABSTRACT

O objetivo deste trabalho foi propor um modelo matemático para predição do peso corporal de cordeiros com base nas medidas biométricas. Foram utilizados dados de 51 cordeiros, com composição genética de pelo menos 50% da raça Santa Inês. O peso corporal (PC) dos animais foi acompanhado durante 91 dias por meio de pesagens semanais. Após as pesagens, foram tomadas as medidas: altura anterior (AA); altura posterior (AP); comprimento corporal (CC); largura de peito (LP); largura de garupa (LG); perímetro torácico (PT) e perímetro de barril (PB). Essas medidas foram utilizadas como variáveis de entrada do modelo. Foi observado correlações positivas e significativas (P<0,05) entre todas as variáveis biométricas com o PC. No entanto, o PC apresentou uma alta correlação com o PT (0,836), seguido do PB (0,818) e AP (0,740). Dessa forma, essas três medidas foram significativas para estimativa do PC. Portanto, o modelo para predizer o PC dos cordeiros foi: Peso (kg)=0,4455* PT - 0,5794 * PB + 0,0019 * AP2 + 0.0053* PB2. O perímetro torácico, perímetro de barril e altura de posterior podem ser utilizados como variáveis preditoras do peso corporal em ovinos mestiços, independente do sexo.(AU)


Subject(s)
Animals , Body Weights and Measures/veterinary , Sheep/growth & development , Biometry/methods
3.
Trop Anim Health Prod ; 53(1): 56, 2021 Jan 03.
Article in English | MEDLINE | ID: mdl-33389198

ABSTRACT

The aim of this study was to develop prediction equations for the body weight of Pelibuey ewes from body measurements comparing linear vs nonlinear models. A subsample of 197 ewes was scored for body weight (BW), rump length (RL), rump width (RW), height at withers (HW), chest girth (CG), chest width (CW), chest depth (CD), cannon bone perimeter (CP), and body length (BL). Pearson's correlation analysis was performed on a sub-data set from 197 ewes to estimate the relationship between body weight and body measurements. Multiple linear regressions were fitted to obtain prediction equations of body weight from the eight body measurements, and prediction equations were obtained from the body measurement that showed the highest correlation with body weight using five nonlinear models allometric, saturation growth, exponential, and incomplete gamma. Data from an independent subsample of 196 ewes was used to validate the equation with the best goodness of fit using linear regression analysis. CG was the body measurement that showed the highest correlation with BW, and based on multiple stepwise regression, in the equation BW = - 60.622 + 1.233CG explained 79% of the body weight variation. Moreover, BW prediction was more accurate when other measurements such CW, BL, and RW were added to the model generating to the equation BW = - 68.875 + 0.845CG + 0.866CW + 0.195BL + 0.601RW (R2 = 0.85, MSE = 15.51). In the case of nonlinear models, incomplete gamma and exponential models generated the equations with the best goodness of fit and precision: BW = 0.077CG1.108exp(0.016CG) (R2 = 0.82, MSE = 18.64) and BW = 3.5759exp(0.0292CG) (R2 = 0.82, MSE = 18.65) respectively.


Subject(s)
Body Weight , Sheep , Animals , Female , Linear Models , Regression Analysis
4.
Vet. Zoot. ; 25(2/4)set. 2018. tab
Article in Portuguese | VETINDEX | ID: vti-741724

ABSTRACT

Este estudio tuvo como objetivo evaluar la predicción del peso corporal de ovinos de la raza Texel, mediante regresión lineal y no lineal basado en las medidas del cuerpo de la circunferencia del pecho, longitud del cuerpo, cruz de la altura y la circunferencia escrotal, y para describir el comportamiento de crecimiento de las medidas en relación con el peso. Se utilizaron datos de 200 animales de Texel. Los datos fueron recolectados por técnicos capacitados para exposiciones agrícolas que tuvieron lugar en el estado de Paraná entre 2009 y 2014. Los datos para los machos y las hembras se analizaron por separado. Se determinó las correlaciones entre los rasgos. Todas estas características se correlacionaron significativamente, con la circunferencia que presenta mayor correlación con el peso corporal (r = 0,93 para los machos y r = 0,90 para las hembras). Entre los modelos estadísticos generados para la predicción de peso, lo que considera la circunferencia de pecho y la altura fueron los más acertados. La longitud del cuerpo no fue satisfactoria en la predicción. Al probar regresión no lineal, se observó que las mediciones biométricas mostraron un crecimiento alométrico negativo en relación con el peso corporal, lo que indica que estas medidas aumentan más rápido que el peso. Las medidas del cuerpo, en particular la circunferencia pueden ser usados como un método alternativo para la obtención de peso animal.(AU)


This study aimed to evaluate the prediction of body weight of Texel sheep, through linear and nonlinear regression, based on body measurements of chest girth, body length, withers height and scrotal circumference, and to describe the growth behavior of the measures in relation to the body weight. Data from 200 Texel sheep were used. Data were collected by trained technicians in agricultural exhibitions that took place in the state of Parana, Brazil between 2009 and 2014. The data for males and females were analyzed separately. It was determined the correlations between the measures and the weight. All these characteristics were significantly correlated, with the chest girth presenting the greater correlation with body weight (r = 0.93 for males and r = 0.90 for females). Among the statistical models generated for the prediction of body weight, the models which considered the chest girth and withers height were the most accurate. Body length was not satisfactory in the prediction. In the nonlinear regressions, it was observed that the biometric measures showed negative allometric growth in relation to body weight, indicating that these measures increase faster than weight. The body measurements, particularly the chest girth can be used as an alternative method for obtaining the animal body weight.(AU)


Objetivou-se avaliar a predição do peso corporal de ovinos da raça Texel, por meio de regressões lineares e não-lineares com base nas medidas corporais de perímetro torácico, comprimento corporal, altura de cernelha e circunferência escrotal, bem como descrever o comportamento do crescimento das medidas em relação ao peso. Foram utilizados dados de 200 animais da raça Texel. Os dados foram coletados por técnicos treinados durante exposições agropecuárias que ocorreram no estado do Paraná entre os anos de 2009 e 2014. Os dados de machos e fêmeas foram analisados separadamente. Determinou-se as correlações entre as características estudadas. Todas as características foram significativamente correlacionadas, com o perímetro torácico apresentando maior correlação com o peso corporal (r=0,93 para machos e r=0,90 para fêmeas). Dentre os modelos estatísticos gerados para a predição do peso, os que consideraram o perímetro torácico e altura foram os mais precisos. O comprimento corporal não foi satisfatório na predição. Ao se testar as regressões não-lineares, foi observado que as medidas biométricas apresentaram crescimento alométrico negativo em relação ao peso corporal, indicando que essas medidas aumentam mais rapidamente do que o peso.As medidas corporais, principalmente o perímetro torácico, podem ser usadas como método alternativo para obtenção de peso dos animais.(AU)


Subject(s)
Animals , Body Weights and Measures/statistics & numerical data , Body Weights and Measures/veterinary , Forecasting/methods , Sheep/anatomy & histology , Biometry/methods
5.
Vet. zootec ; 25(2/4)set. 2018. tab
Article in Portuguese | VETINDEX | ID: biblio-1503529

ABSTRACT

Este estudio tuvo como objetivo evaluar la predicción del peso corporal de ovinos de la raza Texel, mediante regresión lineal y no lineal basado en las medidas del cuerpo de la circunferencia del pecho, longitud del cuerpo, cruz de la altura y la circunferencia escrotal, y para describir el comportamiento de crecimiento de las medidas en relación con el peso. Se utilizaron datos de 200 animales de Texel. Los datos fueron recolectados por técnicos capacitados para exposiciones agrícolas que tuvieron lugar en el estado de Paraná entre 2009 y 2014. Los datos para los machos y las hembras se analizaron por separado. Se determinó las correlaciones entre los rasgos. Todas estas características se correlacionaron significativamente, con la circunferencia que presenta mayor correlación con el peso corporal (r = 0,93 para los machos y r = 0,90 para las hembras). Entre los modelos estadísticos generados para la predicción de peso, lo que considera la circunferencia de pecho y la altura fueron los más acertados. La longitud del cuerpo no fue satisfactoria en la predicción. Al probar regresión no lineal, se observó que las mediciones biométricas mostraron un crecimiento alométrico negativo en relación con el peso corporal, lo que indica que estas medidas aumentan más rápido que el peso. Las medidas del cuerpo, en particular la circunferencia pueden ser usados como un método alternativo para la obtención de peso animal.


This study aimed to evaluate the prediction of body weight of Texel sheep, through linear and nonlinear regression, based on body measurements of chest girth, body length, withers height and scrotal circumference, and to describe the growth behavior of the measures in relation to the body weight. Data from 200 Texel sheep were used. Data were collected by trained technicians in agricultural exhibitions that took place in the state of Parana, Brazil between 2009 and 2014. The data for males and females were analyzed separately. It was determined the correlations between the measures and the weight. All these characteristics were significantly correlated, with the chest girth presenting the greater correlation with body weight (r = 0.93 for males and r = 0.90 for females). Among the statistical models generated for the prediction of body weight, the models which considered the chest girth and withers height were the most accurate. Body length was not satisfactory in the prediction. In the nonlinear regressions, it was observed that the biometric measures showed negative allometric growth in relation to body weight, indicating that these measures increase faster than weight. The body measurements, particularly the chest girth can be used as an alternative method for obtaining the animal body weight.


Objetivou-se avaliar a predição do peso corporal de ovinos da raça Texel, por meio de regressões lineares e não-lineares com base nas medidas corporais de perímetro torácico, comprimento corporal, altura de cernelha e circunferência escrotal, bem como descrever o comportamento do crescimento das medidas em relação ao peso. Foram utilizados dados de 200 animais da raça Texel. Os dados foram coletados por técnicos treinados durante exposições agropecuárias que ocorreram no estado do Paraná entre os anos de 2009 e 2014. Os dados de machos e fêmeas foram analisados separadamente. Determinou-se as correlações entre as características estudadas. Todas as características foram significativamente correlacionadas, com o perímetro torácico apresentando maior correlação com o peso corporal (r=0,93 para machos e r=0,90 para fêmeas). Dentre os modelos estatísticos gerados para a predição do peso, os que consideraram o perímetro torácico e altura foram os mais precisos. O comprimento corporal não foi satisfatório na predição. Ao se testar as regressões não-lineares, foi observado que as medidas biométricas apresentaram crescimento alométrico negativo em relação ao peso corporal, indicando que essas medidas aumentam mais rapidamente do que o peso.As medidas corporais, principalmente o perímetro torácico, podem ser usadas como método alternativo para obtenção de peso dos animais.


Subject(s)
Animals , Sheep/anatomy & histology , Body Weights and Measures/statistics & numerical data , Body Weights and Measures/veterinary , Forecasting/methods , Biometry/methods
6.
R. bras. Ci. Vet. ; 24(4): 184-188, out.-dez. 2017. tab, graf
Article in Portuguese | VETINDEX | ID: vti-734721

ABSTRACT

Objetivou-se avaliar nesse estudo o uso da biometria durante o crescimento de cordeiros da raça Poll Dorset, com o intuito de estimar o peso vivo. Foram utilizados 32 cordeiros, sendo 20 machos e 12 fêmeas, nascidos entre julho e setembro de 2014 e 2015, sendo as coletas realizadas do nascimento aos 165 dias com intervalo de 15 dias entre as avaliações. O estudo gerou 1920 observações de pesos e medidas biométricas. A cada tomada de peso também foram realizadas medidas de perímetro torácico, com a utilização de fita métrica graduada em centímetros, comprimento de corpo, altura de cernelha e altura de garupa utilizando um hipômetro. Os dados foram submetidos à análise de correlação e a partir destes gerou-se gráficos de dispersão e estimaram-se equações de regressão, além de estimar o desenvolvimento ponderal. O perímetro torácico (0,88) foi a característica mais associada ao peso corporal in vivo. As equações de regressão reafirmaram a alta relação entre perímetro torácico e peso vivo, que foi de 94%. O desenvolvimento ponderal caracterizou animais com padrão racial homogêneo. Conclui-se que o perímetro torácico está altamente associado ao peso corporal e que equações de regressão geradas a partir de medidas biométricas servem para estimar o peso corporal de ovinos da raça Poll Dorset.(AU)


The objective of this work was evaluated the growth lambs Poll Dorset to estimate the live weight. Were used 32 lambs, 20 males and 12 females, born between July and September 2014 and 2015, and the assessment carried out from birth to 165 days with an interval of 15 days between assessments. The study generated 1920 observations of weights and biometric measurements. Each weight measurement were also performed thoracic measures with tape graduated in centimeters, body length and hip height using a hipometer. The data was submitted to correlation analysis and generated scatter plots and regression equations estimatingthe weight development. The thoracic measures (0.88) was the characteristic most associated with body weight in vivo. The regression equations reaffirmed the high relationship between thoracic measures and body weight, which was 94%. The weight development featured animals with homogeneous racial pattern. We conclude that the knowledge of the weight development reflects a racial standard and the thoracic measures is highly associated with body weight and regression equations generated from this measurements are used to estimate the body weight of the breed sheep Poll Dorset.(AU)


Subject(s)
Animals , Sheep/growth & development , Weight by Height , Body Weights and Measures/veterinary , Biometry , Animal Husbandry
7.
Acta Sci. Anim. Sci. ; 39(2): 201-206, apr.-jun. 2017. tab, graf
Article in English | VETINDEX | ID: vti-691088

ABSTRACT

This study was realized to evaluate prediction models for body weight (BW) using body measurements as heart girth (HG), wither height (WH), hip width (HW), body length (BL) and hip height (HH), and develop new Equations to predict the BW of Holstein and crossbred heifers. Prediction Equations (1, 2, 3, 4, 5 and 6) proposed in previous studies were tested, while body measurements, which were more significant in terms of predicting BW, were used to obtain new Equations. Heart girth was the body measurement with the greater correlation with BW. Equation 4 presented the best prediction results, showing a low average deviation, high accuracy and precision. Equations 1 and 2 predicted with a high presence of bias, while 2 had the lowest value of the concordance correlation coefficient and a great contribution made by systematic error. The 3 model presented a high variability in predicting BW. For both Holstein and crossbred heifers, the Equations evaluated are inadequate for predicting BW. Among the Equations evaluated, the model using HG presented the best adjustment and the greater adjusted coefficient of determination. Body measurements relating to HG and BL were the most significant variables in predicting the BW, resulting in the following Equation: BW = - 372.89 + 2.8072 × HG + 1.6087 × BL.(AU)


Este estudo foi realizado para avaliar modelos de predição de peso corporal (PC), utilizando-se medidas corporais como perímetro torácico (PT), altura de cernelha (AC), largura de garupa (LG), comprimento corporal (CC) e altura de garupa (AG), e desenvolver novas Equações de estimação de PC para novilhas Holandesas e mestiças. Foram testadas Equações de predição (1, 2, 3, 4, 5 e 6) propostas em estudos anteriores e as medidas corporais mais relacionadas com PC foram utilizadas para gerar novas Equações. O perímetro torácico é a medida corporal mais correlacionada com PC. A Equação 4 apresentou os melhores resultados de predição com baixo desvio médio e alta precisão e exatidão. As Equações 1 e 2 apresentaram alto viés de estimação, enquanto 2 teve o menor valor de coeficiente de correlação e concordância, e grande contribuição de erro sistemático. O modelo 3 apresentou alta variabilidade na predição de PC. Tanto para novilhas Holandesas quanto mestiças, as Equações avaliadas não são eficientes em predizer PC. Entre as Equações avaliadas, o modelo usando PT apresentou o melhor ajuste e maior coeficiente de determinação ajustado. As medidas corporais de PT e CC foram as variáveis mais significativas na predição do PC, sendo utilizadas na obtenção da Equação: PC = - 372.89 + 2.8072 × PT + 1.6087 × CC.(AU)


Subject(s)
Animals , Cattle , Cattle/anatomy & histology , Cattle/growth & development , Body Weights and Measures/methods , Body Weights and Measures/veterinary
8.
Acta sci., Anim. sci ; 39(2): 201-206, apr.-jun. 2017. tab, graf
Article in English | VETINDEX | ID: biblio-1459715

ABSTRACT

This study was realized to evaluate prediction models for body weight (BW) using body measurements as heart girth (HG), wither height (WH), hip width (HW), body length (BL) and hip height (HH), and develop new Equations to predict the BW of Holstein and crossbred heifers. Prediction Equations (1, 2, 3, 4, 5 and 6) proposed in previous studies were tested, while body measurements, which were more significant in terms of predicting BW, were used to obtain new Equations. Heart girth was the body measurement with the greater correlation with BW. Equation 4 presented the best prediction results, showing a low average deviation, high accuracy and precision. Equations 1 and 2 predicted with a high presence of bias, while 2 had the lowest value of the concordance correlation coefficient and a great contribution made by systematic error. The 3 model presented a high variability in predicting BW. For both Holstein and crossbred heifers, the Equations evaluated are inadequate for predicting BW. Among the Equations evaluated, the model using HG presented the best adjustment and the greater adjusted coefficient of determination. Body measurements relating to HG and BL were the most significant variables in predicting the BW, resulting in the following Equation: BW = - 372.89 + 2.8072 × HG + 1.6087 × BL.


Este estudo foi realizado para avaliar modelos de predição de peso corporal (PC), utilizando-se medidas corporais como perímetro torácico (PT), altura de cernelha (AC), largura de garupa (LG), comprimento corporal (CC) e altura de garupa (AG), e desenvolver novas Equações de estimação de PC para novilhas Holandesas e mestiças. Foram testadas Equações de predição (1, 2, 3, 4, 5 e 6) propostas em estudos anteriores e as medidas corporais mais relacionadas com PC foram utilizadas para gerar novas Equações. O perímetro torácico é a medida corporal mais correlacionada com PC. A Equação 4 apresentou os melhores resultados de predição com baixo desvio médio e alta precisão e exatidão. As Equações 1 e 2 apresentaram alto viés de estimação, enquanto 2 teve o menor valor de coeficiente de correlação e concordância, e grande contribuição de erro sistemático. O modelo 3 apresentou alta variabilidade na predição de PC. Tanto para novilhas Holandesas quanto mestiças, as Equações avaliadas não são eficientes em predizer PC. Entre as Equações avaliadas, o modelo usando PT apresentou o melhor ajuste e maior coeficiente de determinação ajustado. As medidas corporais de PT e CC foram as variáveis mais significativas na predição do PC, sendo utilizadas na obtenção da Equação: PC = - 372.89 + 2.8072 × PT + 1.6087 × CC.


Subject(s)
Animals , Cattle , Cattle/anatomy & histology , Cattle/growth & development , Body Weights and Measures/methods , Body Weights and Measures/veterinary
9.
Conscientiae saúde (Impr.) ; 14(4): 600-607, 30 dez. 2015.
Article in Portuguese | LILACS | ID: biblio-2201

ABSTRACT

Introdução: O diagnóstico de sobrepeso e obesidade pode ser realizado pela antropometria, por facilidade de execução e baixo custo. Considerando a preocupação com a característica de distribuição de gordura, novas estratégias poderiam ser desenvolvidas para a avaliação da composição corporal partindo de medidas antropométricas. Objetivos: Verificar a correlação do Perímetro Abdominal (PAB) e Perímetro da Cintura (PC) em separado, com o somatório de duas dobras cutâneas (DC), triciptal e subescapular; e incluir o perímetro com os maiores valores de correlação em uma equação de regressão para estimativa do somatório de DC. Métodos: Amostra composta por 1.729 meninos (9 e 14 anos), a avaliação da morfologia corporal foi realizada por medidas antropométricas simples e compostas. Foi utilizada uma correlação de Spearman para determinar a associação entre os PAB e PC com as DC. Foi feita uma análise de regressão linear múltipla com o PAB e idade para estimar o somatório de DC. Resultados: A seguinte equação foi gerada: Somatório de DC = 1,16397 (PAB) ­ 1,414922 (Idade) ­ 36,33021 (R=0,83). O valor da área sob a curva ROC (AUC) foi de 83% para identificar corretamente indivíduos abaixo ou acima do percentil 85 do somatório de DC. Conclusões: O PAB em conjunto com a idade, se torna um bom preditor da gordura corporal, caracterizada como o somatório de DC, em crianças e adolescentes do sexo masculino.


Introduction: The diagnosis of overweight and obesity can be accomplished by anthropometry, for ease of implementation and low cost. Considering the concern for the distribution of fat, new strategies could be developed for the diagnosis of body composition from anthropometric measurements. Objectives: To investigate the association of the abdominal girth (AG) and waist girth (WG) separately, with the sum of two skinfolds (SF), triceps and subscapular; and include the girth with higher correlation levels in a regression equation to estimate the SF sum. Methods: A sample of 1,729 boys (9 and 14), the evaluation of body composition was composed by simple and compound anthropometric measurements. The Spearman correlation was used to determine the association between AG and WG with the sum of SF. A multiple linear regression was applied including AG and age to estimate the sum of SF. Results: The following equation was generated: Sum of SF = 1.16397 (AG) - 1.414922 (age) - 36.33021 (R = 0.83). The area under the ROC curve (AUC) was 83% for correctly identifying individuals below or above the 85th percentile of the SF sum. Conclusions: AG, together with age, becomes a good predictor of body fat, characterized as the sum of two SF in children and adolescent males.


Subject(s)
Humans , Male , Child , Adolescent , Skinfold Thickness , Abdominal Circumference , Subcutaneous Fat/anatomy & histology , Students , Anthropometry/methods , Cross-Sectional Studies , Adiposity
10.
Ci. Rural ; 45(7): 1235-1240, July 2015. tab
Article in Portuguese | VETINDEX | ID: vti-76347

ABSTRACT

Neste estudo, acompanhou-se o desenvolvimento de quatro clones de seringueira [Hevea brasiliensis (Willd. ex A. Juss.) Müell. Arg.] selecionados pelo Instituto Agronômico de Campinas (IAC 35; 40; 300 e 301) com relação à testemunha RRIM 600, durante os primeiros 24 meses de cultivo. O experimento foi instalado com espaçamento 1,5x1,0m, em delineamento em blocos casualizados, com três repetições e quatro plantas por parcela, em São José do Rio Preto, SP. Foram avaliados o perímetro do caule e o número de lançamentos maduros; a taxa fotossintética e o conteúdo de pigmentos fotossintéticos. Ao final do acompanhamento, o perímetro médio do tronco, a 50cm do calo de enxertia, variou entre 5,85cm (IAC 301) e 10,53cm (IAC 300) e o número médio de lançamentos maduros, de 2,58 (IAC 301) a 3,91 (RRIM 600). No período seco, em idade de 22 meses após o plantio, os valores médios de taxa fotossintética de IAC 40 e IAC 301 (12mol m-2 s-1) foram inferiores aos dos demais clones (15mol m-2 s-1). Os teores de clorofila a, clorofila b e carotenoides totais foram iguais ou superiores aos da testemunha, mas nunca inferiores. Considerando as variáveis analisadas, com exceção do 301, os clones IAC mostram desempenho comparável ao do clone RRIM 600.(AU)


In this study the development of four clones (IAC 35; 40; 300 e 301) of rubber tree [Hevea brasiliensis (Willd. ex A. Juss.) Müell. Arg.] selected by Instituto Agronômico de Campinas were evaluated during the first 24 months of cultivation. The experiment was laid out in randomized block design with three replications and four plants for parcel following the 1.5mx1.0m spacing at São José do Rio Preto, SP. The clone RRIM 600 was used as check. The variables analyzed were the trunk girth, the number of matured whorl, the photosynthesis rate and the concentrations of chlorophyll a, b, total and carotenoids. At the end of the experiment the values of trunk girth at 0.5m above the budgrafting union varied from 5.85 cm (IAC 301) to 10.53 cm (IAC 300) and the mean number of matured whorl varied from 2.58 (IAC 301) to 3.91 (RRIM 600). During the dry season, when the plants were 22 month old, the mean value of photosynthesis rate of IAC 40 and IAC 301 (12mol m-2 s-1) were lower compared to the other clones (15mol m-2 s-1). The chlorophyll a, b and total carotenoids concentrations were equal or superior to the check, never lower. Considering the variables analyzed, excluding the IAC 301, the other clones show performance comparable to RRIM 600.(AU)


Subject(s)
Clone Cells , Hevea/anatomy & histology , Hevea/growth & development , Hevea/genetics , Genotype , Plant Breeding
11.
Ciênc. rural (Online) ; 45(7): 1235-1240, July 2015. tab
Article in Portuguese | VETINDEX | ID: biblio-1479668

ABSTRACT

Neste estudo, acompanhou-se o desenvolvimento de quatro clones de seringueira [Hevea brasiliensis (Willd. ex A. Juss.) Müell. Arg.] selecionados pelo Instituto Agronômico de Campinas (IAC 35; 40; 300 e 301) com relação à testemunha RRIM 600, durante os primeiros 24 meses de cultivo. O experimento foi instalado com espaçamento 1,5x1,0m, em delineamento em blocos casualizados, com três repetições e quatro plantas por parcela, em São José do Rio Preto, SP. Foram avaliados o perímetro do caule e o número de lançamentos maduros; a taxa fotossintética e o conteúdo de pigmentos fotossintéticos. Ao final do acompanhamento, o perímetro médio do tronco, a 50cm do calo de enxertia, variou entre 5,85cm (IAC 301) e 10,53cm (IAC 300) e o número médio de lançamentos maduros, de 2,58 (IAC 301) a 3,91 (RRIM 600). No período seco, em idade de 22 meses após o plantio, os valores médios de taxa fotossintética de IAC 40 e IAC 301 (12mol m-2 s-1) foram inferiores aos dos demais clones (15mol m-2 s-1). Os teores de clorofila a, clorofila b e carotenoides totais foram iguais ou superiores aos da testemunha, mas nunca inferiores. Considerando as variáveis analisadas, com exceção do 301, os clones IAC mostram desempenho comparável ao do clone RRIM 600.


In this study the development of four clones (IAC 35; 40; 300 e 301) of rubber tree [Hevea brasiliensis (Willd. ex A. Juss.) Müell. Arg.] selected by Instituto Agronômico de Campinas were evaluated during the first 24 months of cultivation. The experiment was laid out in randomized block design with three replications and four plants for parcel following the 1.5mx1.0m spacing at São José do Rio Preto, SP. The clone RRIM 600 was used as check. The variables analyzed were the trunk girth, the number of matured whorl, the photosynthesis rate and the concentrations of chlorophyll a, b, total and carotenoids. At the end of the experiment the values of trunk girth at 0.5m above the budgrafting union varied from 5.85 cm (IAC 301) to 10.53 cm (IAC 300) and the mean number of matured whorl varied from 2.58 (IAC 301) to 3.91 (RRIM 600). During the dry season, when the plants were 22 month old, the mean value of photosynthesis rate of IAC 40 and IAC 301 (12mol m-2 s-1) were lower compared to the other clones (15mol m-2 s-1). The chlorophyll a, b and total carotenoids concentrations were equal or superior to the check, never lower. Considering the variables analyzed, excluding the IAC 301, the other clones show performance comparable to RRIM 600.


Subject(s)
Clone Cells , Genotype , Hevea/anatomy & histology , Hevea/growth & development , Hevea/genetics , Plant Breeding
14.
Bol. ind. anim. (Impr.) ; 71: 31-31, 2014.
Article in English | LILACS-Express | VETINDEX | ID: biblio-1466611

ABSTRACT

The body weight (BW) determination is important to evaluate the growth of animals, their nutritional condition and reproduction and to establish the slaughter time and the sale value of the animal. The chest girth (CG) could be an alternative to determine the body weight of sheep on properties that do not have scales. The objective of this study was to investigate the feasibility of using chest girth to determine the estimated body weight (EBW). The data file contained 1762 records of body weight (BW) and chest girth (CG) from 426 Santa Ines breed sheep, belonging to eight herds located in Southeastern Brazil. The chest girth was measured using the sternum and the withers as base, passing the tape measure behind the shoulder. Body weights were related to CG values through linear regressions using the software Statistical Analysis Systems (SAS Inst., Inc., Cary, NC). The age classes 1, 2, 3, were defined respectively as: 0 to 12 months; 13 to 22 months; over 34 months. The regression equation used to predict the body weight through chest girth in different age classes was y = b0 + b1x, where y is the dependent variable EBW, x is the independent variable CG, b0 is the intercept, b1 is the slope of the equation that defines the relationship between EBW and CG. The other variables were constant. The regression equations for specific age groups of animals were: Class 1 EBW = -42.201


O artigo não apresenta resumo em português.

15.
Bol. ind. anim. (Impr.) ; 71: 28-28, 2014.
Article in English | LILACS-Express | VETINDEX | ID: biblio-1466638

ABSTRACT

Feed efficiency is difficult to evaluate because individual feeding are required. An alternative is selecting animals based on traits easier to obtain and genetically favorably correlated with feed efficiency traits. This study aimed to estimate genetic and phenotypic correlations between feed efficiency traits (residual feed intake RFI, feed efficiency FE and residual BW gain RG) with yearling weight (YW), hip height (HH) and girth circumference (GC) in Nellore cattle. Feed efficiency data set consisted of 887 records of DMI, ADG and BW0.75 obtained during performance tests (83 ± 15 d) to calculate RFI (0.005 ± 0.58 kg DM/d), FE (0.14 ± 0.03) and RG (0.00 ± 0.11 kg/d). FE was calculated as ADG and DMI ratio, RFI was estimated as the error of multiple regression of DMI on ADG and BW0.75, and RG was estimated as the error of multiple regression of ADG on DMI and BW0.75. The YW data set consisted of 7,948 records of males (314.45 ± 45.85 kg) and females (282.68 ± 48.19 kg) adjusted to 378 and 550 d of age, respectively. The HH consisted of 6,418 records of males (131.80 ± 5.40 cm) and females (132.51 ± 5.38 cm), and 3,745 records of GC of males (162.56 ± 8.48 cm) and females (167.72 ± 8.08 cm). Pedigree file contained 9,830 animals. Growth traits were analyzed as unit standard deviation of each sex/age. (Co)variance components were estimated through two-trait animal models


O artigo não apresenta resumo em português.

18.
B. Indústr. Anim. ; 71: 28-28, 2014.
Article in English | VETINDEX | ID: vti-467929

ABSTRACT

Feed efficiency is difficult to evaluate because individual feeding are required. An alternative is selecting animals based on traits easier to obtain and genetically favorably correlated with feed efficiency traits. This study aimed to estimate genetic and phenotypic correlations between feed efficiency traits (residual feed intake RFI, feed efficiency FE and residual BW gain RG) with yearling weight (YW), hip height (HH) and girth circumference (GC) in Nellore cattle. Feed efficiency data set consisted of 887 records of DMI, ADG and BW0.75 obtained during performance tests (83 ± 15 d) to calculate RFI (0.005 ± 0.58 kg DM/d), FE (0.14 ± 0.03) and RG (0.00 ± 0.11 kg/d). FE was calculated as ADG and DMI ratio, RFI was estimated as the error of multiple regression of DMI on ADG and BW0.75, and RG was estimated as the error of multiple regression of ADG on DMI and BW0.75. The YW data set consisted of 7,948 records of males (314.45 ± 45.85 kg) and females (282.68 ± 48.19 kg) adjusted to 378 and 550 d of age, respectively. The HH consisted of 6,418 records of males (131.80 ± 5.40 cm) and females (132.51 ± 5.38 cm), and 3,745 records of GC of males (162.56 ± 8.48 cm) and females (167.72 ± 8.08 cm). Pedigree file contained 9,830 animals. Growth traits were analyzed as unit standard deviation of each sex/age. (Co)variance components were estimated through two-trait animal models


O artigo não apresenta resumo em português.

19.
B. Indústr. Anim. ; 71: 31-31, 2014.
Article in English | VETINDEX | ID: vti-467476

ABSTRACT

The body weight (BW) determination is important to evaluate the growth of animals, their nutritional condition and reproduction and to establish the slaughter time and the sale value of the animal. The chest girth (CG) could be an alternative to determine the body weight of sheep on properties that do not have scales. The objective of this study was to investigate the feasibility of using chest girth to determine the estimated body weight (EBW). The data file contained 1762 records of body weight (BW) and chest girth (CG) from 426 Santa Ines breed sheep, belonging to eight herds located in Southeastern Brazil. The chest girth was measured using the sternum and the withers as base, passing the tape measure behind the shoulder. Body weights were related to CG values through linear regressions using the software Statistical Analysis Systems (SAS Inst., Inc., Cary, NC). The age classes 1, 2, 3, were defined respectively as: 0 to 12 months; 13 to 22 months; over 34 months. The regression equation used to predict the body weight through chest girth in different age classes was y = b0 + b1x, where y is the dependent variable EBW, x is the independent variable CG, b0 is the intercept, b1 is the slope of the equation that defines the relationship between EBW and CG. The other variables were constant. The regression equations for specific age groups of animals were: Class 1 EBW = -42.201


O artigo não apresenta resumo em português.

20.
Int. j. morphol ; 27(1): 49-52, Mar. 2009. graf, tab
Article in English | LILACS | ID: lil-552985

ABSTRACT

The correlation between chest girth and weight of sheep and goats have been studied as a predictive guide in homestead farms where equipment to definitively quantify the weight of animals are unavailable and inaccessible. The livestock markets in the South Western part of Nigeria are still very underdeveloped and consist of peasant farmers taking their few animals to more developed areas to offer them for better prices to the consumer or middle men who are in the trade to attain the best profit. Twenty each of sheep and goats were randomly selected in herds from three different commercial locations and evaluated using weight and chest girth measurements as indices. Mean weight for the 3 groups of sheep was between 19.8 and 31.15kg, while for the 3 groups of goats was between 19.6 and 16.35kg. There was correlation (0.39-0.80) between sheep chest girth and weight which does not differ from those already established in literature and apredictive index of W= (18.9 +/- 0.36) CG where in more than 80 percent of the population are accounted for and in goats, correlation of 0.40-0.76 and a predictive index of W= (18.51 +/-0.31) CG where more than 76 percent of the population falls in. It was therefore concluded that chest girth is a useful tool in predicting weight of commercial sheep and goat.


La correlación entre la circunferencia de pecho y el peso de las ovejas y cabras ha sido estudiada como una guía de predicción en granjas, donde el equipo para cuantificar el peso de los animales no está disponible o es de difícil acceso. Los mercados de ganado en la parte sur-occidental de Nigeria, siguen siendo aún muy subdesarroliados y constan de campesinos que tienen pocos animales, a diferencia de zonas más desarrolladas, para ofrecer los mejores precios para el consumidor quienes están los comercializan para alcanzar el mejor beneficio. Veinte ovejas y veinte cabras fueron seleccionadas al azar entre los rebaños de tres diferentes localidades comerciales, y fueron evaluadas utilizando el peso y la circunferencia de pecho como los índices de mediciones. La media de peso de los 3 grupos de ovejas fue entre 19,8 y 31,15kg, respectivamente, mientras que para los 3 grupos de cabras fue entre 19,6 y 16,35kg. Hubo correlación (0,39-0,80) entre la circunferencia de pecho de las ovejas y el peso, que no difieren de las ya establecidas en la bibliografía y un índice predictivo de W = (18,9 +/- 0,36) CG en donde más del 80 por ciento de la población se contabilizan y en el ganado caprino, la correlación de 0,40-0,76 y un índice predictivo deW = (18,51 +/- 0,31)CG donde se encuentra más del 76 por ciento de la población. Por lo tanto, se llegó ala conclusión que la circunferencia de pecho es una herramienta útil en la predicción del peso vivo de las ovejas y cabras comerciales.


Subject(s)
Body Weights and Measures , Body Weights and Measures/veterinary , Thorax/anatomy & histology , Goats/anatomy & histology , Livestock Industry/economics , Nigeria/ethnology , Sheep/anatomy & histology
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