Carcass and muscle characteristics of beef cull cows between 4 and 9 years of age
| Autor: | Catherine Jurie, Anne Listrat, Brigitte Picard, J. Culioli, R. Jailler, J. F. Martin |
|---|---|
| Přispěvatelé: | ProdInra, Migration, Unité de Recherches sur les Herbivores (URH), Institut National de la Recherche Agronomique (INRA), Qualité des Produits Animaux (QuaPA) |
| Jazyk: | angličtina |
| Rok vydání: | 2006 |
| Předmět: |
2. Zero hunger
0303 health sciences MUSCLE FIBRES 0402 animal and dairy science Live weight Longissimus Thoracis BREED DIFFERENCES food and beverages 04 agricultural and veterinary sciences Metabolism Biology 040201 dairy & animal science Breed 03 medical and health sciences chemistry.chemical_compound Animal science Isocitrate dehydrogenase chemistry Lactate dehydrogenase [SDV.SA.SPA]Life Sciences [q-bio]/Agricultural sciences/Animal production studies Muscle weight Animal Science and Zoology [SDV.SA.SPA] Life Sciences [q-bio]/Agricultural sciences/Animal production studies Carcass composition 030304 developmental biology |
| Zdroj: | Animal Science Animal Science, Cambridge University Press (CUP), 2006, 82 (3), pp.415-421 HAL |
| ISSN: | 1357-7298 |
| Popis: | The effects of age and breed on carcass and muscle characteristics of cull cows slaughtered at the same fattening state between 4 and 9 years of age were analysed in four French breeds: Aubrac (AU), Charolais (CH), Limousin (LI), and Salers (SA). Muscle characteristics were determined in three muscles: longissimus thoracis (LT), semitendinosus (ST) and triceps brachii (TB). They included: (1) the % frequency, cross-sectional area and % area of the different fibre types classified according to their contraction rate and metabolic properties (slow twitch oxidative (SO), fast twitch oxidative glycolytic (FOG) and fast twitch glycolytic (FG)), (2) the isocitrate dehydrogenase (ICDH) and lactate dehydrogenase (LDH) activities, representative of oxidative and glycolytic metabolism respectively, and (3) the total and insoluble collagen contents. Whatever the age of the animals at slaughter, the same carcass composition, fibre characteristics (% frequency, area, % area) and metabolic enzyme activities were obtained whatever the muscles considered. In contrast, important differences between breeds were observed in carcass composition (muscle, fat, bone) and enzyme activities. CH cows presented the highest final live weight and LI carcasses were characterized by higher muscle weight, lower fat and bone weights and more glycolytic muscles. Among the muscle characteristics, collagen was the most influenced by age and breed in a breed and muscle dependent manner respectively. AU and LI cows exhibited lower total and insoluble collagen contents than CH and SA cows, particularly at 6 to 7 years of age and for the LT and ST muscles. Thus collagen could explain an important part of the variability in meat quality from cull cows. In conclusion, results of this study provide consistent data on muscle characteristics of cull cows, few studies were available until then. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|