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Bernad L, Casado PD, Murillo NL, Picallo AB, Garriz CA, Maceira NO. Meat quality traits in the Greater rhea (Rhea americana) as influenced by muscle, sex and age. Poult Sci 2018; 97:1579-1587. [PMID: 29462477 DOI: 10.3382/ps/pey005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Accepted: 01/05/2018] [Indexed: 11/20/2022] Open
Abstract
Meat from the Greater rhea (Rhea americana) could compete with traditional red meats, diversifying the market of protein products of animal origin. The meat from 32 rheas was used to study quality aspects and this included ultimate pH (pHu), color, water-holding capacity (WHC%), cooking loss (CL%) and tenderness. The muscles sampled were the Gastrocnemius pars externa, Iliofibularis and Obturatorius medialis from both sexes at multiple ages (10, 12, 14, 16 months). Age at slaughter affected WHC%, CL%, and color in raw meat and tenderness in cooked meat. Muscles under study showed differences in terms of pHu, raw meat color, and tenderness of cooked meat. Sex did not have a significant effect on any of the variables studied. According to our results, rhea meat from younger animals, between 10 to 14 months old, was tender and moderately juicy and the visual color was appreciated by the consumers.
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Affiliation(s)
- L Bernad
- Grupo de Recursos Naturales y Gestión Ambiental, Estación Experimental Agropecuaria Balcarce, Instituto Nacional de Tecnología Agropecuaria (INTA), Ruta Nacional 226, km. 73.5, (7620) Balcarce, Buenos Aires, Argentina
| | - P D Casado
- Área Ciencia y Tecnología de Alimentos, Facultad de Ciencias Agrarias, Universidad Nacional de Mar del Plata, Ruta Nacional 226, km. 73.5, (7620) Balcarce, Buenos Aires, Argentina
| | - N L Murillo
- Grupo de Recursos Naturales y Gestión Ambiental, Estación Experimental Agropecuaria Balcarce, Instituto Nacional de Tecnología Agropecuaria (INTA), Ruta Nacional 226, km. 73.5, (7620) Balcarce, Buenos Aires, Argentina.,Cátedra de Estadística y Diseño, Facultad de Ciencias Agrarias, Universidad Nacional de Mar del Plata, Ruta Nacional 226, km. 73.5, (7620) Balcarce, Buenos Aires, Argentina
| | - A B Picallo
- Área Calidad de Productos Pecuarios y Estudios del Consumidor, Facultad de Agronomía, Universidad de Buenos Aires, Av. San Martín 4453, C1417DSE Buenos Aires, Argentina
| | - C A Garriz
- Instituto de Tecnología de Alimentos, Centro de Investigaciones de Agroindustria, Centro Nacional de Investigaciones Agropecuarias (CNIA), Nicolás Repetto y de los Reseros s/n, (1686) Hurlingham, Buenos Aires, Argentina
| | - N O Maceira
- Grupo de Recursos Naturales y Gestión Ambiental, Estación Experimental Agropecuaria Balcarce, Instituto Nacional de Tecnología Agropecuaria (INTA), Ruta Nacional 226, km. 73.5, (7620) Balcarce, Buenos Aires, Argentina
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Horbańczuk OK, Wierzbicka A. Technological and nutritional properties of ostrich, emu, and rhea meat quality. J Vet Res 2016. [DOI: 10.1515/jvetres-2016-0043] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Abstract
In recent years a growing demand for ratite meat, including ostrich, emu, and rhea has been observed all over the world. However, consumers as well as the meat industry still have limited and scattered knowledge about this type of meat, especially in the case of emu and rhea. Thus, the aim of the present review is to provide information on technological and nutritional properties of ostrich, emu, and rhea meat, including carcass composition and yields, physicochemical characteristics, and nutritive value. Carcass yields and composition among ratites are comparable, with the exception of higher content of fat in emu. Ostrich, emu, and rhea meat is darker than beef and ratite meat acidification is closer to beef than to poultry. Ratite meat can be recognised as a dietetic product mainly because of its low level of fat, high content of polyunsaturated fatty acids (PUFA), favourable n6/n3 ratio, and high iron content in comparison with beef and chicken meat. Ratite meat is also rich in selenium, copper, vitamin B, and biologically active peptides such as creatine (emu) and anserine (ostrich), and has low content of sodium (ostrich). The abundance of bioactive compounds e.g. PUFA, makes ratite meat highly susceptible to oxidation and requires research concerning elaboration of innovative, intelligent packaging system for protection of nutritional and technological properties of this meat.
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Affiliation(s)
- Olaf K. Horbańczuk
- Faculty of Human Nutrition and Consumer Sciences, Warsaw University of Life Sciences, 02-776 Warsaw, Poland
| | - Agnieszka Wierzbicka
- Faculty of Human Nutrition and Consumer Sciences, Warsaw University of Life Sciences, 02-776 Warsaw, Poland
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Chagnot C, Vénien A, Peyrin F, Jamme F, Réfrégiers M, Desvaux M, Astruc T. Deep UV excited muscle cell autofluorescence varies with the fibre type. Analyst 2015; 140:4189-96. [PMID: 25912941 DOI: 10.1039/c5an00172b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The rat skeletal muscle consists of four pure types of muscle cells called type I, type IIA, type IIX and type IIB, and their hybrids in different proportions. They differ in their contraction speeds and metabolic pathways. The intracellular composition is adapted to the fibre function and therefore to fibre types. Given that small differences in composition are likely to alter the optical properties of the cells, we studied the impact of the cell type on the fluorescence response following excitation in the deep UV region. Rat soleus and extensor digitorum longus (EDL) muscle fibres, previously identified based on their cell types by immunohistofluorescence analysis, were analyzed by synchrotron fluorescence microspectroscopy on stain-free serial muscle cross-sections. Muscle fibres excited at 275 nm showed differences in the fluorescence emission intensity among fibre types at 302, 325, 346 and 410 nm. The 410/325 ratio decreased significantly with contractile and metabolic features in EDL muscle, in the order of I > IIA > IIX > IIB fibres (p < 0.01). Compared to type I fibres, the 346/302 ratio of IIA fibres decreased significantly in both EDL and soleus muscles (p < 0.01). This study highlights the usefulness of autofluorescence spectral signals to characterize histological cross-sections of muscle fibres with no staining chemicals.
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Affiliation(s)
- Caroline Chagnot
- INRA, UR370 Qualité des Produits Animaux, F-63122 Saint-Genès-Champanelle, France
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