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Kasapidou E, Iliadis IV, Mitlianga P, Papatzimos G, Karatzia MA, Papadopoulos V, Amanatidis M, Tortoka V, Tsiftsi E, Aggou A, Basdagianni Z. Variations in Composition, Antioxidant Profile, and Physical Traits of Goat Milk within the Semi-Intensive Production System in Mountainous Areas during the Post-Weaning to End-of-Lactation Period. Animals (Basel) 2023; 13:3505. [PMID: 38003123 PMCID: PMC10668865 DOI: 10.3390/ani13223505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 11/08/2023] [Accepted: 11/09/2023] [Indexed: 11/26/2023] Open
Abstract
Dairy products from mountain-origin milk are known for their superior composition and quality. This study aimed to examine changes in composition, nutritional quality, and antioxidant properties of milk from semi-intensively managed goats in mountainous regions during the post-weaning to end-of-lactation period. Bulk tank milk samples from 10 farms were collected bi-weekly in the period from March to September. The farms were situated in regions with an average altitude of 772.20 m above sea level. The results revealed significant variations in milk composition, with fluctuations in fat, protein, lactose, and total solids. Milk yield per doe showed seasonal differences, with the highest yield in April and the lowest in September. Fatty acid composition exhibited changes throughout the sampling period, with variations in polyunsaturated fatty acids. Nutritional indices, such as the atherogenicity index and thrombogenicity index, remained within the recommended values. Antioxidant properties, including total phenolic content, DPPH, FRAP, and ABTS, showed significant differences, with higher values toward the end of the study. Milk pH, electrical conductivity, brix value, and refractive index also exhibited variations, while density and freezing point remained relatively stable. The study provided valuable information that can be used to develop breeding and feeding plans to achieve uniform milk quality in mountainous regions.
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Affiliation(s)
- Eleni Kasapidou
- Department of Agriculture, University of Western Macedonia, 53100 Florina, Greece (V.P.)
| | | | - Paraskevi Mitlianga
- Department of Chemical Engineering, University of Western Macedonia, 50100 Kozani, Greece (P.M.)
| | - Georgios Papatzimos
- Department of Agriculture, University of Western Macedonia, 53100 Florina, Greece (V.P.)
| | | | - Vasileios Papadopoulos
- Department of Agriculture, University of Western Macedonia, 53100 Florina, Greece (V.P.)
| | - Michail Amanatidis
- Department of Agriculture, University of Western Macedonia, 53100 Florina, Greece (V.P.)
| | - Vasiliki Tortoka
- Department of Chemical Engineering, University of Western Macedonia, 50100 Kozani, Greece (P.M.)
| | - Ekaterini Tsiftsi
- Department of Chemical Engineering, University of Western Macedonia, 50100 Kozani, Greece (P.M.)
| | - Antonia Aggou
- School of Agriculture, Department of Animal Production, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece (Z.B.)
| | - Zoitsa Basdagianni
- School of Agriculture, Department of Animal Production, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece (Z.B.)
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Peña-Avelino LY, Ceballos-Olvera I, Rosales-Martinez GN, Hernández-Melendez J, Alva-Pérez J. Milk Composition of Creole Goats Raised at Different Altitudes in an Extensive Production System in Northeast Mexico. Animals (Basel) 2023; 13:1738. [PMID: 37889663 PMCID: PMC10251814 DOI: 10.3390/ani13111738] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2023] [Revised: 05/18/2023] [Accepted: 05/21/2023] [Indexed: 10/29/2023] Open
Abstract
Goat milk composition is affected by feeding, and in semiarid rangeland, information on Creole goat milk physicochemical composition is lacking. For the fulfillment of this objective, three agroecological regions (AR) considering altitude (lowland 87, highland 779, and mountain 1309 m above sea level) with different botanical compositions were chosen. Every AR analyzed accounted for 30 goat herds, with a total of 90 herds. The results demonstrated that altitude had an influence mainly on density and protein. Milk density increases as altitude increases; conversely, milk protein increases as altitude decreases. On the other hand, in the mountain and lowland ARs, the salts and solids not fat (SNF) percentages were higher compared to that of the highland AR (p < 0.05). The freezing point (FP) was higher at highland altitudes compared to that of mountain and lowland ARs (p < 0.01). In the milk fatty acids (FA) profile, only the C14:1 value was affected by altitude, whereas goat milk at lowland and mountain altitudes had higher values compared to that at highland altitudes (p < 0.05). Additionally, late lactation stage fat, FP, and pH values were higher compared to early lactation values. The opposite effect was observed for salts and SNF. In the FA profile, late lactation values were higher for C10:0 and C8:0 compared to early lactation values. The opposite trend was observed for C18:2n6t. The thrombogenic index was significantly higher at lowland altitudes compared to highland altitudes, and similar to the mountain AR. These goat milk characteristics could be explained as a consequence of animal nutrition, as well as the goat's meat-type phenotype.
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Affiliation(s)
- Luz Y. Peña-Avelino
- Faculty of Veterinary Medicine and Animal Science “Dr. Norberto Treviño Zapata”, Autonomous University of Tamaulipas, Ciudad Victoria 87000, Mexico; (L.Y.P.-A.); (I.C.-O.); (G.N.R.-M.)
| | - Ivonne Ceballos-Olvera
- Faculty of Veterinary Medicine and Animal Science “Dr. Norberto Treviño Zapata”, Autonomous University of Tamaulipas, Ciudad Victoria 87000, Mexico; (L.Y.P.-A.); (I.C.-O.); (G.N.R.-M.)
| | - Gerardo N. Rosales-Martinez
- Faculty of Veterinary Medicine and Animal Science “Dr. Norberto Treviño Zapata”, Autonomous University of Tamaulipas, Ciudad Victoria 87000, Mexico; (L.Y.P.-A.); (I.C.-O.); (G.N.R.-M.)
| | - Javier Hernández-Melendez
- Faculty of Engineering and Sciences, Autonomous University of Tamaulipas, Centro Universitario Victoria, Ciudad Victoria 87000, Mexico;
| | - Jorge Alva-Pérez
- Faculty of Veterinary Medicine and Animal Science “Dr. Norberto Treviño Zapata”, Autonomous University of Tamaulipas, Ciudad Victoria 87000, Mexico; (L.Y.P.-A.); (I.C.-O.); (G.N.R.-M.)
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Baseline composition and microbial quality assessment of raw milk from small ruminants and Maghrebi camels in the oasis area of Tunisia. Trop Anim Health Prod 2022; 54:391. [DOI: 10.1007/s11250-022-03408-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Accepted: 11/16/2022] [Indexed: 11/24/2022]
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Pazzola M, Amalfitano N, Bittante G, Dettori ML, Vacca GM. Composition, coagulation properties, and predicted cheesemaking traits of bulk goat milk from different farming systems, breeds, and stages of production. J Dairy Sci 2022; 105:6724-6738. [PMID: 35787330 DOI: 10.3168/jds.2022-22098] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 04/04/2022] [Indexed: 11/19/2022]
Abstract
At the global level, the quantity of goat milk produced and its gross production value have increased considerably over the last 2 decades. Although many scientific papers on this topic have been published, few studies have been carried out on bulk goat milk samples. The aim of the present study was to investigate in the field the effects of farming system, breed type, individual flock, and stage of production on the composition, coagulation properties (MCP), curd firming over time parameters (CFt), predicted cheese yield (CY%), and nutrient recovery traits (REC) of 432 bulk milk samples from 161 commercial goat farms in Sardinia, Italy. We found that the variance due to individual flock was of the same order as the residual variance for almost all composition and cheesemaking traits. With regard to the fixed effects, the effect of farming system on bulk milk variability was not highly significant for the majority of traits (it was lower than individual flock), whereas the effects of breed type and stage of production were much higher. More specifically, the intensive farms produced milk with the best concentrations of almost all constituents, whereas extensive farms exhibited faster rennet coagulation times, a slower rate of curd firming, lower potential curd firmness, and lower percentages of fat and energy recoveries in the fresh curd. Farms rearing the local breed, Sarda, alone or together with the Maltese breed, produced milk with the best concentrations of fat and protein, superior curd firmness, and better predicted percentage of fresh curd (CYCURD) and recovery traits. The results show the potential of both types of breed, either for their quantitative (specialized breeds) or their qualitative (local breeds) attributes. As expected, the concentrations of fat, protein fractions, and lactose were influenced by the stage of production, with samples collected in the early stage of production (in February and March) having a greater quantity of the main constituents. Somatic cells reached the highest levels in the late stage of production, which corresponds to the goats' advanced stage of lactation (June-July), although no differences were present in the logarithmic bacterial counts between the early and late stages. Regarding cheesemaking potential, bulk milk samples of the late stage were characterized by delayed rennet coagulation and curd firming times, the lowest values of curd firmness, and a general reduction in CY%, and REC traits. In conclusion, we highlight several issues regarding the effects of the most important sources of variation on bulk goat milk, and point to some critical factors relevant for improving dairy goat farming and milk production.
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Affiliation(s)
- Michele Pazzola
- Department of Veterinary Medicine, University of Sassari, via Vienna 2, 07100 Sassari, Italy
| | - Nicolò Amalfitano
- Department of Agronomy, Food, Natural resources, Animals and Environment (DAFNAE), University of Padova, viale dell'Università 16, 35020 Legnaro (PD), Italy.
| | - Giovanni Bittante
- Department of Agronomy, Food, Natural resources, Animals and Environment (DAFNAE), University of Padova, viale dell'Università 16, 35020 Legnaro (PD), Italy
| | - Maria L Dettori
- Department of Veterinary Medicine, University of Sassari, via Vienna 2, 07100 Sassari, Italy
| | - Giuseppe M Vacca
- Department of Veterinary Medicine, University of Sassari, via Vienna 2, 07100 Sassari, Italy
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Khaldi Z, Nafti M, Jilani MT. Small ruminants milk from Tunisian oasis: physicochemical characteristics, mineral contents, and microbiological quality. Trop Anim Health Prod 2021; 54:1. [PMID: 34862933 DOI: 10.1007/s11250-021-03000-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Accepted: 11/25/2021] [Indexed: 11/28/2022]
Abstract
Characteristics and quality aspects of milk from native ovine Queue Fine de l'Ouest (QFO) and the exotic D'man (DMN) breeds were investigated and compared with those of two subgroups of the local goat population Arbi and Serti. A total of 418 individual milk samples were collected from multiparous lactating animals reared in the continental oasis region of Tunisia. Samples were analyzed for physical parameters (pH, density, and acidity), chemical composition (dry matter, fat, protein, lactose, casein, ash, and casein/protein ratio), mineral concentrations (Ca, P, Na, K, and Ca/P) and microbiological features (total mesophilic aerobic bacteria (TMAB), total coliforms count (TCC), lactic acid bacteria (LAB), sulphite-reducing Clostridium (CSR), yeast and molds (Y/M), Staphylococcus aureus (S. aureus), Escherichia coli (E. coli), and Salmonella) according to standard methods. The values obtained for physicochemical, mineral, and microbial parameters revealed noticeable differences in the milk of the four studied breeds. On the whole milk samples, the mean value of pH, density, and acidity in milk collected from sheep breeds appeared higher than in milk collected from goat subgroups. As for milk composition, results showed a remarkable disparity between studied breeds and clear superiority of sheep breeds compared to goat's subgroups in all chemical contents being studied (dry matter, fat, protein, lactose, casein, and ash). The differences are more important, especially for dry matter, fat, protein, and casein content, whereas casein/protein ratio distinguished goat's genotypes, and the highest one was obtained for Serti Subgroup. When comparing sheep versus goat's milk for macro-minerals, the current study indicated lower K and higher concentrations of Ca, P, and Na. The milk of QFO sheep, the richest in casein and protein, was expressed with significantly higher levels of calcium and phosphorus compared to the DMN sheep breed and the two goat subgroups. The microbiological examination evidenced that the milk of both species complies with standard criteria required by the Tunisian legislation on the hygiene of milk and dairy products. The microbial quality of ewe milk was higher than goat milk, based on LAB and Y/M, while goats produced milk with better quality referring to TMAB and TCC counts. No significant differences were found for Staphylococcus aureus and Escherichia coli between examined breeds. Got results highlighted the complete absence of the two dangerous pathogens Salmonella and CSR in all investigated samples of small ruminants' milk.
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Affiliation(s)
- Zahran Khaldi
- Department of Animal Production, Regional Center for Research in Oasis Agriculture, Institution of Agricultural Research and Higher Education, University of Carthage, Route Tozeur Km1, Degueche, Tunis, Tunisia.
| | - Mounir Nafti
- Department of Animal Production, Regional Center for Research in Oasis Agriculture, Institution of Agricultural Research and Higher Education, University of Carthage, Route Tozeur Km1, Degueche, Tunis, Tunisia
| | - Mohamed Tabarek Jilani
- Regional Public Health Laboratory of Tozeur, Ministry of Public Health, 2233, Bled El hadar, Tozeur, Tunisia
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Stocco G, Dadousis C, Vacca GM, Pazzola M, Paschino P, Dettori ML, Ferragina A, Cipolat-Gotet C. Breed of goat affects the prediction accuracy of milk coagulation properties using Fourier-transform infrared spectroscopy. J Dairy Sci 2021; 104:3956-3969. [PMID: 33612240 DOI: 10.3168/jds.2020-19491] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 12/23/2020] [Indexed: 01/23/2023]
Abstract
The prediction of traditional goat milk coagulation properties (MCP) and curd firmness over time (CFt) parameters via Fourier-transform infrared (FTIR) spectroscopy can be of significant economic interest to the dairy industry and can contribute to the breeding objectives for the genetic improvement of dairy goat breeds. Therefore, the aims of this study were to (1) explore the variability of milk FTIR spectra from 4 goat breeds (Camosciata delle Alpi, Murciano-Granadina, Maltese, and Sarda), and to assess the possible discriminant power of milk FTIR spectra among breeds, (2) assess the viability to predict coagulation traits by using milk FTIR spectra, and (3) quantify the effect of the breed on the prediction accuracy of MCP and CFt parameters. In total, 611 individual goat milk samples were used. Analysis of variance of measured MCP and CFt parameters was carried out using a mixed model including the farm and pendulum as random factors, and breed, parity, and days in milk as fixed factors. Milk spectra for each goat were collected over the spectral range from wavenumber 5,011 to 925 × cm-1. Discriminant analysis of principal components was used to assess the ability of FTIR spectra to identify breed of origin. A Bayesian model was used to calibrate equations for each coagulation trait. The accuracy of the model and the prediction equation was assessed by cross-validation (CRV; 80% training and 20% testing set) and stratified CRV (SCV; 3 breeds in the training set, one breed in the testing set) procedures. Prediction accuracy was assessed by using coefficient of determination of validation (R2VAL), the root mean square error of validation (RMSEVAL), and the ratio performance deviation. Moreover, measured and FTIR predicted traits were compared in the SCV procedure by assessing their least squares means for the breed effect, Pearson correlations, and variance heteroscedasticity. Results showed the feasibility of using FTIR spectra and multivariate analyses to correctly assign milk samples to their breeds of origin. The R2VAL values obtained with the CRV procedure were moderate to high for the majority of coagulation traits, with RMSEVAL and ratio performance deviation values increasing as the coagulation process progresses from rennet addition. Prediction accuracy obtained with the SCV were strongly influenced by the breed, presenting general low values restricting a practical application. In addition, the low Pearson correlation coefficients of Sarda breed for all the traits analyzed, and the heteroscedastic variances of Camosciata delle Alpi, Murciano-Granadina, and Maltese breeds, further indicated that it is fundamental to consider the differences existing among breeds for the prediction of milk coagulation traits.
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Affiliation(s)
- Giorgia Stocco
- Department of Veterinary Science, University of Parma, 43126 Parma, Italy
| | - Christos Dadousis
- Department of Veterinary Science, University of Parma, 43126 Parma, Italy
| | | | - Michele Pazzola
- Department of Veterinary Medicine, University of Sassari, 07100 Sassari, Italy
| | - Pietro Paschino
- Department of Veterinary Medicine, University of Sassari, 07100 Sassari, Italy
| | - Maria Luisa Dettori
- Department of Veterinary Medicine, University of Sassari, 07100 Sassari, Italy
| | - Alessandro Ferragina
- Department of Food Quality and Sensory Science, Teagasc Food Research Centre, D15 KN3K Dublin, Ireland
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