Use of cold carcass weight and fat depth measurements to predict carcass composition of Rasa Aragonesa lambs

Detalhes bibliográficos
Autor(a) principal: Delfa, Rafael
Data de Publicação: 1996
Outros Autores: González, C., Teixeira, Alfredo
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10198/796
Resumo: A total of 22 measurements of fat depth, taken along the 13th rib, 5-6th lumbar vertebra, 3-4th sacrum vertebra, and the 2nd, 2-3rd, 3rd, 3-4th, 4th. 4-5th stemebra of the breast bone, were taken on intact carcasses with a sharpened steel rule, and related to the carcass composition of 18 Rasa Aragonesa lambs. The objective was to study the accuracy of these different measurements for predicting carcass composition and possible value, in the process of carcass grading or classification of ‘Temasco’ Aragdn lambs. Cold carcass weight (CCW) accounted for 74% and 40% of the total variation of muscle weight and total carcass fat weight, respectively. The addition of 4 cm fat depth over the 13th rib from the left side accounted for a further 13% of muscle weight, and the addition of 4 cm fat depth over the 5-6th lumbar vertebra from the right side accounted for a further 29% of the variation of total carcass fat weight. Regarding different fat depots, CCW accounted for 49% and 31% of the total variation of the intermuscular fat and kidney and pelvic fat, respectively. However, CCW alone only accounted for 21% (NS) of the total variation of subcutaneous fat weight, but the addition of 4 cm fat depth over the 13th rib from the right side or the addition of 4 cm fat depth over the 5-6th lumbar vertebra from the right side accounted for a further 47% of the subcutaneous fat variation. A comparison of the residual standard deviations (RSD) of the two measurements indicated that the fat depth over the 5-6th lumbar vertebra was more accurate for predicting subcutaneous fat. The highest precision, after CCW, for predicting intermuscular fat, was fat depth over the 13th rib from the left side, which accounted for a further 18% of total variation of this fat depot. Prediction of carcass composition was improved by the addition of fat depth measurements, assisting in the commercial classification of ‘Temasco’ Aragdn lambs.
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spelling Use of cold carcass weight and fat depth measurements to predict carcass composition of Rasa Aragonesa lambsA total of 22 measurements of fat depth, taken along the 13th rib, 5-6th lumbar vertebra, 3-4th sacrum vertebra, and the 2nd, 2-3rd, 3rd, 3-4th, 4th. 4-5th stemebra of the breast bone, were taken on intact carcasses with a sharpened steel rule, and related to the carcass composition of 18 Rasa Aragonesa lambs. The objective was to study the accuracy of these different measurements for predicting carcass composition and possible value, in the process of carcass grading or classification of ‘Temasco’ Aragdn lambs. Cold carcass weight (CCW) accounted for 74% and 40% of the total variation of muscle weight and total carcass fat weight, respectively. The addition of 4 cm fat depth over the 13th rib from the left side accounted for a further 13% of muscle weight, and the addition of 4 cm fat depth over the 5-6th lumbar vertebra from the right side accounted for a further 29% of the variation of total carcass fat weight. Regarding different fat depots, CCW accounted for 49% and 31% of the total variation of the intermuscular fat and kidney and pelvic fat, respectively. However, CCW alone only accounted for 21% (NS) of the total variation of subcutaneous fat weight, but the addition of 4 cm fat depth over the 13th rib from the right side or the addition of 4 cm fat depth over the 5-6th lumbar vertebra from the right side accounted for a further 47% of the subcutaneous fat variation. A comparison of the residual standard deviations (RSD) of the two measurements indicated that the fat depth over the 5-6th lumbar vertebra was more accurate for predicting subcutaneous fat. The highest precision, after CCW, for predicting intermuscular fat, was fat depth over the 13th rib from the left side, which accounted for a further 18% of total variation of this fat depot. Prediction of carcass composition was improved by the addition of fat depth measurements, assisting in the commercial classification of ‘Temasco’ Aragdn lambs.Un total de 22 mesures d'épaisseur du gras, évaluées sur la 13ème côte, entre la 5ème et la 6ème vertèbre lombaire, 3ème et 4ème vertèbre du sacrum et 2ème, 2ème–3ème, 3ème, 3ème–4ème, 4ème, 4ème–5ème sternèbres du sternum, ont été effectuées par calibrage, sur des carcasses entières et intactes et ont été rapportées à la composition de la carcasse de 18 agneaux de race Rasa Aragonesa, en ayant comme objectif principal l'étude exacte des différentes mesures d'épaisseur du gras comme éléments de prédiction de la composition de la carcasse, ainsi que líntérêt de l'inclure dans un schéma de classification commerciale du Ternasco de Aragón. Le poids de la carcasse froide (PCF) explique 74 et 40% de la variation totale du poids du muscle et du gras total de la carcasse respectivement. L'addition de la mesure de l'épaisseur du gras prise sur le côté gauche de la carcasse à 4 cm de la 13éme côté augmente de 13% la précision de l'estimation de poids du muscle et l'addition de la mesure de l'épaisseur du gras prise sur le côté droit de la carcasse entre la 5ème et la 6ème vertèbre lombaire augmente de 29% la précision de l'estimation du poids du gras total de la carcasse. En ce qui concerne les différents dépôts adipeux de la carcasse, le PCF explique 49 et 31% de la variation du poids du gras intermusculaire et pelvico-rénal respectivement. Cependant, le PCF n'explique que 21% (NS) de la variation totale du poids du gras sous-cutané, néanmoins l'addition de la mesure de l'épaisseur du gras prise sur le côté droit de la carcasse à 4 cm de la 13ème côte ou de celle prise entre la 5ème et 6ème vertèbre lombaire augmentent de 47% la précision de l'estimation de la variation du gras sous-cutané. RSD a été utilisé pour comparer l'exactitude de ces deux mesures, et on a constaté que des deux mesures, la deuxième s'est avérée plus correcte. Après le PCF, la plus grande précision pour prédire le gras intermusculaire a été obtenue en mesurant l'épaisseur du gras sur le côté gauche de la carcasse à 4 cm de la 13ème côte la précision de la varitation totale de ce dépôt gras ayant augmenté de 18%. La prédiction de la composition des carcasses s'est améliorée avec l'addition des mesures de l'épaisseur du gras, celles-ci pouvant être inclues dans un schéma de classification commerciale du Ternasco de Aragón.Un total de 22 medidas de espesor de grasa, evaluadas en la 13 costilla, entre la 5 y 6 vértebra lumbar, 3 y 4 vértebra sacra y 2 , 2–3 , 3 , 3–4 , 4 , 4–5 esternebras del esternón, fueron efectuadas con calibre, en canales enteras e intactas, y relacionadas con la composición de la canal de 18 corderos de raza Rasa Aragonesa, con el principal objetivo de estudiar la exactitud de las diferentes medidas de espesor de grasa como predictoras de la composición de la canal, así como el interés de su inclusión en un esquema de clasificación comercial del Ternasco de Aragón. El peso de la canal fría (PCF) explica el 74 y 40% de la variación total del peso del músculo y de la grasa total de la canal respectivamente. La adición de la medida de espesor de grasa tomada en el lado izquierdo de la canal a 4 cm de la 13 costilla incrementa un 13% la precisión de la estimación del peso del músculo y la adición de la medida de espesor de grasa tomada en el lado derecho de la canal entre la 5 y 6 vertebra lumbar incrementa un 29% la precisión de la estimación del peso de la grasa total de la canal. Respecto a los diferentes depósitos adiposos de la canal, el PCF explica el 49 y 31% de la variación total del peso de la grasa intermuscular y pélvico-renal respectivamente. Sin embargo, el PCF, solamente explica el 21% (NS) de la variación total del peso de la grasa subcutánea, no obstante la adición de la medida de espesor de grasa tomada en el lado derecho de la canal a 4 cm de la 13 costilla o de la tomada entre la 5 y 6 vértebra lumbar incrementan un 47% la precisión de la estimación de la variación de grasa subcutánea. Para comparar la exactitud de estas dos medidas se utilizó el RSD, observándose que de las dos es más correcta la segunda. La mayor precisión, tras el PCF, para predecir la grasa intermuscular se obtuvo con el espesor de grasa medido en el lado izquierdo de la canal a 4 cm de la 13 costilla que incrementó en un 18% la precisión de la estimación de la variación total de este depósito graso. La predicción de la composición de las canales se incrementó con la adición de medidas de espesor de grasa, pudiendo ser incluidas en un esquema de clasificación comercial del Ternasco de Aragón.ElsevierBiblioteca Digital do IPBDelfa, RafaelGonzález, C.Teixeira, Alfredo2008-09-09T16:14:11Z19961996-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10198/796engDelfa, R.; González, C.; Teixeira, A. (1996). Use of cold carcass weight and fat depth measurements to predict carcass composition of Rasa Aragonesa lambs. Small Ruminant Research. ISSN 0921-4488. 20:3, p. 267-2740921-448810.1016/0921-4488(95)00776-8info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-11-21T10:03:52Zoai:bibliotecadigital.ipb.pt:10198/796Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T22:54:26.701666Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Use of cold carcass weight and fat depth measurements to predict carcass composition of Rasa Aragonesa lambs
title Use of cold carcass weight and fat depth measurements to predict carcass composition of Rasa Aragonesa lambs
spellingShingle Use of cold carcass weight and fat depth measurements to predict carcass composition of Rasa Aragonesa lambs
Delfa, Rafael
title_short Use of cold carcass weight and fat depth measurements to predict carcass composition of Rasa Aragonesa lambs
title_full Use of cold carcass weight and fat depth measurements to predict carcass composition of Rasa Aragonesa lambs
title_fullStr Use of cold carcass weight and fat depth measurements to predict carcass composition of Rasa Aragonesa lambs
title_full_unstemmed Use of cold carcass weight and fat depth measurements to predict carcass composition of Rasa Aragonesa lambs
title_sort Use of cold carcass weight and fat depth measurements to predict carcass composition of Rasa Aragonesa lambs
author Delfa, Rafael
author_facet Delfa, Rafael
González, C.
Teixeira, Alfredo
author_role author
author2 González, C.
Teixeira, Alfredo
author2_role author
author
dc.contributor.none.fl_str_mv Biblioteca Digital do IPB
dc.contributor.author.fl_str_mv Delfa, Rafael
González, C.
Teixeira, Alfredo
description A total of 22 measurements of fat depth, taken along the 13th rib, 5-6th lumbar vertebra, 3-4th sacrum vertebra, and the 2nd, 2-3rd, 3rd, 3-4th, 4th. 4-5th stemebra of the breast bone, were taken on intact carcasses with a sharpened steel rule, and related to the carcass composition of 18 Rasa Aragonesa lambs. The objective was to study the accuracy of these different measurements for predicting carcass composition and possible value, in the process of carcass grading or classification of ‘Temasco’ Aragdn lambs. Cold carcass weight (CCW) accounted for 74% and 40% of the total variation of muscle weight and total carcass fat weight, respectively. The addition of 4 cm fat depth over the 13th rib from the left side accounted for a further 13% of muscle weight, and the addition of 4 cm fat depth over the 5-6th lumbar vertebra from the right side accounted for a further 29% of the variation of total carcass fat weight. Regarding different fat depots, CCW accounted for 49% and 31% of the total variation of the intermuscular fat and kidney and pelvic fat, respectively. However, CCW alone only accounted for 21% (NS) of the total variation of subcutaneous fat weight, but the addition of 4 cm fat depth over the 13th rib from the right side or the addition of 4 cm fat depth over the 5-6th lumbar vertebra from the right side accounted for a further 47% of the subcutaneous fat variation. A comparison of the residual standard deviations (RSD) of the two measurements indicated that the fat depth over the 5-6th lumbar vertebra was more accurate for predicting subcutaneous fat. The highest precision, after CCW, for predicting intermuscular fat, was fat depth over the 13th rib from the left side, which accounted for a further 18% of total variation of this fat depot. Prediction of carcass composition was improved by the addition of fat depth measurements, assisting in the commercial classification of ‘Temasco’ Aragdn lambs.
publishDate 1996
dc.date.none.fl_str_mv 1996
1996-01-01T00:00:00Z
2008-09-09T16:14:11Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10198/796
url http://hdl.handle.net/10198/796
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Delfa, R.; González, C.; Teixeira, A. (1996). Use of cold carcass weight and fat depth measurements to predict carcass composition of Rasa Aragonesa lambs. Small Ruminant Research. ISSN 0921-4488. 20:3, p. 267-274
0921-4488
10.1016/0921-4488(95)00776-8
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eu_rights_str_mv openAccess
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dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
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instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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