Objective quantification of conformation of the Icelandic horse based on 3-D video morphometric measurements

Kristjánsson, Þorvaldur; Björnsdóttir, Sigríður; Sigurdsson, A; Crevier-Denoix, Nathalie; Pourcelot, Philippe; Árnason, Þorvaldur

doi:10.1016/j.livsci.2013.09.019

Cited by 17 publications

(17 citation statements)

References 26 publications

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“…The age of the horses within the subpopulation ranged from 4 to 10 years, with a mean of 6.0 years, sired by 66 sires, with 1-7 offspring each. The subpopulation included 72 previously described horses (Kristjansson et al, 2013) and additionally 26 horses that were included to provide a material with a wider distribution of scores for the different gaits. The conformation of these horses was objectively quantified using a three-dimensional video morphometric method developed by Crevier-Denoix et al (2006).…”

Section: Collection Of Datamentioning

confidence: 99%

“…The conformation of these horses was objectively quantified using a three-dimensional video morphometric method developed by Crevier-Denoix et al (2006). The method has been described in detail by Kristjansson et al (2013). Table 1 Mean, range and variation of the standard conformational measurements and calculated measurements and their heritability (h 2 ), genetic variance (s 2 a ), permanent environmental variance (s 2 pe ), repeatability (t) and genetic correlation with total score for riding ability (r g ).…”

Section: Collection Of Datamentioning

confidence: 99%

“…The optimum of À 1.7 cm for total score for riding ability can be explained by the low optimum for tölt ( À 4.3) as it has the highest weight in the total score (15%). It has been shown that the body format of the Icelandic horse has changed in recent decades from a rectangular body format towards a square one (Kristjansson et al, 2013). It is likely that this change in body format has been facilitated by the strong selection for tölt in the same period.…”

Section: Table 11mentioning

confidence: 99%

“…These studies have involved linear type conformation traits (Rustin et al, 2009), measurements using photogrammetric methods (Holmström et al, 1990) and images provided by video records (Back et al, 1996;Crevier-Denoix et al, 2006;Weller et al, 2006a). The method of Crevier-Denoix et al (2006) has been used to quantify the conformation of the Selle Francais horse and the Icelandic horse and found to produce repeatable data (Kristjansson et al, 2013). Reynisdóttir (2001) quantified the conformation of Icelandic horses in a pilot study, using a photogrammetric method and reported significant relationships of some conformational parameters with riding ability.…”

Section: Introductionmentioning

confidence: 99%

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Association of conformation and riding ability in Icelandic horses

Kristjánsson

Björnsdóttir²,

Albertsdóttir

et al. 2016

Livestock Science

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Section: Collection Of Datamentioning

confidence: 99%

Section: Collection Of Datamentioning

confidence: 99%

Section: Table 11mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Association of conformation and riding ability in Icelandic horses

Kristjánsson

Björnsdóttir²,

Albertsdóttir

et al. 2016

Livestock Science

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“…Beyond this background, the question of objectification in conformational evaluation is a permanent issue within scientific literature (Koenen et al, 2004;Druml et al, 2008;Kristjansson et al, 2013;Duensing et al, 2014). With regard to the 'measuring problem of type', we approach in this study an image-based analysis of equine shape.…”

Section: Introductionmentioning

confidence: 99%

The use of novel phenotyping methods for validation of equine conformation scoring results

Druml

Dobretsberger

Brem

2015

Animal

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In this experiment, which is based on a cohort of 44 Lipizzan mares from the Austrian state stud farm of Piber, we present new statistical techniques for the analysis of shape and equine conformation using image data. In addition, we examined which strategies and procedures of image processing techniques led to a successful interpretation of the traits implemented in horse breeding programs. A total of 246 two-dimensional anatomical and somatometric landmarks were digitized from standardized photographs, and the variation of shape has been analyzed by the use of generalized orthogonal least-squares Procrustes (generalized Procrustes analysis (GPA)) procedures. The resulting shape variables have been regressed on the results from linear type trait classifications. In addition, the rating scores of six conformation classifiers were tested for agreement, yielding an interrater correlation (inter-class correlation) ranging from 0.41 to 0.68, respectively, a κ coefficient ranging from 0.16 to 0.53. From the 12 linear type traits assessed on a valuating scale, only the type-related traits (type, breed-type and harmony) revealed significant (P < 0.05) results in the regression analysis of shape variables on linear type traits. The other nine traits were characterized by a lower agreement between classifiers and did not result in a significant 'shape regression'. Finally, the 'horse shape space' defined by shape variables resulting from GPA procedures offered the possibility to assist in trait definition and in the evaluation of ratings, and it is an adequate biological and objective scale to human perception of conformation, which is expressed in numerical data only.

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Growth and Development of the Lusitano Foal on Extensive Systems

Fradinho

2020

Advances in Animal Health, Medicine and Production

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vi concretização de uma parte deste trabalho. Um agradecimento muito especial à Doutora Ana Catarina Vale, também do IST, por todo o envolvimento e colaboração nestes ensaios. Ao Dr. Nuno Bernardes, pela amizade e disponibilidade que sempre teve para nos acompanhar ao longo destes anos. Obrigada por todo o envolvimento nos trabalhos relativos à qualidade do osso (desde o campo até ao corte do "dito"), pelos RX e sua interpretação e pela revisão dos aspectos mais específicos relacionados com os problemas osteoarticulares. Às entidades e coudelarias que facultaram as suas instalações e efectivos. Este trabalho só foi possível graças ao seu envolvimento e colaboração:  Ao ex-Serviço Nacional Coudélico, na pessoa do seu Director à época, Dr. Costa Ferreira, o qual permitiu a inclusão da equipa da FMV no projecto POCI;  À Coudelaria de Alter, posteriormente incluída na ex-Fundação Alter Real, nas pessoas do seu Presidente Engº Vítor Barros e da sua Directora Dra. Idalina Trindade. Em particular, gostaria de agradecer a toda a equipa da Coudelaria de Alter que nos acompanhou e recebeu nos dias de trabalho de campo. À Dra. Maria José Correia, pelo seu empenho e pela sua boa disposição. Obrigada Zézinha, pela invulgar disponibilidade e pela franca amizade! Aos restantes ajudantes, Dra. Madalena Roquette, Sr. Ricardo Antunes, Sr. António Gomes e Sr. Ricardo Vicente, o meu sincero agradecimento;  À Coudelaria Nacional, posteriormente também integrada na ex-Fundação Alter Real, um agradecimento a todos os que de alguma forma colaboraram neste trabalho. Ao Dr. Mário Barbosa, ao Engº Francisco Beja ("dividido" depois também com a Coudelaria de Alter), ao Dr. Ricardo Agrícola, ao Dr. Vitor Grácio, ao Sr. João Francisco Gonçalves, ao Sr. João Fandinga, ao Sr. Lucílio Almeida e ao Sr. Manuel Pechorro (em memória);  Ao Sr. José Manuel de Mello (em memória), pelo pronto acolhimento e pelo entusiasmo com que recebeu este projecto na Coudelaria do Monte da Ravasqueira. Infelizmente a sua perda prematura não permitiu que pudéssemos seguir os seus animais para além de um primeiro ano. Um agradecimento especial a toda a equipa que nos acompanhou na Coudelaria, a Dra. Maria José Vila-Viçosa, o Sr. Júlio Jarego da Fonseca e o Sr. Mariano;  Ao Engº Manuel Campilho e ao seu filho Diogo Campilho, pelo pronto acolhimento deste projecto na Quinta da Lagoalva de Cima, pelo interesse e pela disponibilidade sempre demonstrados. Um agradecimento especial à restante equipa que nos acompanhou, ao Dr. Miguel Bliebernicht, ao Sr. António Rosa e ao Sr. Luís Mira (obrigada pelo contacto com os vossos cavalos de atrelagem e também pelos ensinamentos relativos a esta disciplina);  À Companhia das Lezírias, nas pessoas do seu Presidente à época, Engº Vítor Barros e da sua Administradora Dra. Ana Teresa Caseiro. Mais recentemente, um agradecimento muito especial ao seu actual Presidente, Engº António Saraiva, pelo seu interesse e incentivo. Em particular gostaria de agradecer a todos os que estiveram envolvidos no trabalho de campo, pela ajuda e pela...

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Objective quantification of conformation of the Icelandic horse based on 3-D video morphometric measurements

Cited by 17 publications

References 26 publications

Association of conformation and riding ability in Icelandic horses

Association of conformation and riding ability in Icelandic horses

The use of novel phenotyping methods for validation of equine conformation scoring results

Growth and Development of the Lusitano Foal on Extensive Systems

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