Accuracy of prediction of the liveweight of horses from body measurements

Rs, Jones; Tl, Lawrence; Veevers, A; Cleave, N; Hall, Jr Jf

doi:10.1136/vr.125.22.549

Cited by 21 publications

(39 citation statements)

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“…From these values the following parameters were calculated: (1) estimated body weight (kg) = -648-45 + 6-58 X HG (according to Jones et al, 1989); (2) anamorphosic index = (HG 2 )/H -a factor greater than 2-125 was established to accept a horse to be classified as a draught type (Perez et ah, 1992b). All the animals were examined to ensure that they were healthy.…”

Section: Animalsmentioning

confidence: 99%

Energetic requirements and physiological adaptation of draught horses to ploughing work

et al. 1996

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Five Chilean crossbred draught horses were used to study variation in work performance and biochemical and physiological parameters whilst working with a mould board plough (36 kg) for 6 h/day. The draught force, distance travelled, work done and the estimated extra energy for work were determined for each horse. The results showed that the horses used only 68-0 (s.e. 1-9)% of the total available working time ploughing a mean area of 3283 (s.e. 168) m 2 with a mean depth and width of furrow of 12-6 and 22-3 cm, respectively. Estimated daily energy expenditure by the horses during work was 2-24 (s.e. 0-02) times maintenance requirements. The small changes observed in the physiological variables: heart rate, respiratory rate, packed cell volume, haemoglobin concentration and enzyme activity of creatine kinase, lactate dehydrogenase and aspartate amino transferase, showed that the horses were exercised under submaximal conditions. However, the significant increase in blood cortisol concentrations showed that horses experienced some degree of stress during ploughing work. The significant increase in blood triglycerides concentration observed after each period of work seems to demonstrate that fat mobilization is an important metabolic pathway as an energy supply for the working muscles during prolonged and low speed draught work.

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Section: Animalsmentioning

confidence: 99%

Energetic requirements and physiological adaptation of draught horses to ploughing work

et al. 1996

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“…Se encontraron en la literatura catorce ecuaciones disponibles para la estimación del peso de caballos, según la categoría y edad del animal. En Estados Unidos se encontraron diez ecuaciones (Gibbs y Householder, sf;Milner y Hewitt, 1969;Jones et al, 1989;McGowan et al,2007;Pearson, 2007;Martinson et al, 2014); en España (León, 2007) y Ecuador (Larrea, 2005;Almeida, 2010) se registraron dos por país, mientras que para los países to validate fourteen weigh predictive equations in Ibero-American horses, and develop the breed's own equations for Costa Rica. Material and methods.…”

Section: Introductionunclassified

Validación y desarrollo de ecuaciones predictoras de peso para caballos iberoamericanos en Costa Rica

Solano-Mora¹,

WingChing-Jones

2019

Agron. Mesoam.

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Introducción. Una limitante en los sistemas de producción es el pesaje de los animales, actividad que se realiza de forma empírica o con el uso de cintas de estimación de peso que generan sobre-estimaciones. Objetivo. El objetivo fue validar en caballos iberoamericanos catorce ecuaciones predictoras de peso y desarrollar propias de la raza para Costa Rica. Materiales y métodos. La investigación se realizó entre los meses de septiembre de 2016 y marzo de 2017. Se tomaron las medidas alométricas de peso (kg), longitud (cm), altura a la cruz (cm), perímetro torácico (cm), perímetro umbilical (cm) y edad (meses) de 152 animales (machos y hembras), registrados en la Asociación Centroamericana de Criadores de Caballos de raza iberoamericana. Producto del análisis de la información, se desarrolló una curva de crecimiento para machos (y = 94,54 ln(X) 6 47,14; R2=0,858) y hembras (y=82,09 ln(x)+86,81; R2=0,744). Resultados. De las ecuaciones evaluadas, se determinó que doce permitieron predecir el peso del animal cuando es un potro (p<0,05), cinco cuando se considera joven (p<0,05), seis cuando está en proceso de doma (p<0,05) y seis cuando es adulto (p<0,05). Se determinaron sobre-estimaciones de peso de los animales entre 29,84 y 168,17 kg de peso vivo, según la ecuación utilizada. De igual manera, las ecuaciones desarrolladas hacen uso de las medidas corporales y edad de los animales, con sobre-estimaciones de peso entre 0,67 y 2,17 kg por animal, lo que permitió tener una mejor predicción del peso y así, mejorar la determinación de los requerimientos nutricionales, dosificaciones de productos veterinarios y el manejo de los animales. Conclusión. Se generaron dos ecuaciones que permitieron estimar el peso del caballo iberoamericano, como también se descartaron las ecuaciones disponibles en la literatura, que no permitieron una estimación del peso según la etapa productiva del animal.

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“…In veterinary practice, at least as far as the donkey species is regarded, nutritional assessment is not systematically included in clinical checks. Moreover, the Body Condition Score (BCS) system and the predictive equation for body weight (BW) estimation based on body measurements are widely developed for horses and have been standardized for different horse breeds (Henneke et al, 1983;Jones et al, 1989;Martin-Rosset,1990;Bergero, 1996;Miraglia et al, 1998). However, to our knowledge, very few species-specific methods and techniques have been developed for the donkey species to date (Pearson and Oussat, 1996;Kay et al, 2000;De Aluja et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

An Integrated Approach Towards the Nutritional Assessment of the Sardinian Donkey: A Tool for Clinical Nutritionists

Cappai¹,

Picciau²,

Pinna³

2013

Italian Journal of Animal Science

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The aims of the current study were to establish: i) a species-specific approach for nutritional assessment during clinical checks on Sarda breed adult donkeys, and ii) a suitable equation for body weight prediction, which at present is lacking. A total of 18 adult donkeys were sampled and the following criteria were recorded: body weight (BW), body condition score (BCS), muscular mass index (MMI), along with somatometric measures (height at withers; chest girth) and metabolic profiles of each individual. The species-specific nutritional assessment based on the integrated approach turned out to correlate significantly (P<0.05) with the body condition score and levels of Na, P and cholesterol in blood. The parametric equation for predicting the BW (y=0.353a+0.443b-7.62, where a= height at withers in cm; b= chest girth in cm) closely fit the determined BW, with a standard error of SE=±5 kg BW.

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Accuracy of prediction of the liveweight of horses from body measurements

Cited by 21 publications

References 0 publications

Energetic requirements and physiological adaptation of draught horses to ploughing work

Energetic requirements and physiological adaptation of draught horses to ploughing work

Validación y desarrollo de ecuaciones predictoras de peso para caballos iberoamericanos en Costa Rica

An Integrated Approach Towards the Nutritional Assessment of the Sardinian Donkey: A Tool for Clinical Nutritionists

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