Multivariate characterization of morphological traits in local Tunisian oases goats

Nafti, Mounir; Khaldi, Z.; Haddad, Bassem R.

doi:10.1017/s2078633614000265

Cited by 12 publications

(9 citation statements)

References 17 publications

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“…However, the D 2 value between Kacang goats in the lowland and the highland regions based on body measurements was 0.36 ( Table 6 ). It was similar to the D 2 value observed between Arbi goats in the Jerid and Nefzawa populations (0.33) of Tunisia [ 10 ]. Arandas et al [ 27 ] found that 66.67% of Caninde does in a Pernambuco herd could be characterized by morphometric traits, similar to the Kacang goats highland area.…”

Section: Discussionsupporting

confidence: 86%

Morphometric characterization of Kacang goats raised in lowland and highland areas of Jambi Province, Indonesia

et al. 2020

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Section: Discussionsupporting

confidence: 86%

Morphometric characterization of Kacang goats raised in lowland and highland areas of Jambi Province, Indonesia

et al. 2020

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“…Indeed, the crossbred Serti goat has been obtained, as a result for a long time of several uncontrolled crossbreeding of autochthonous populations with exotic breeds. In addition, the intermixing between various breeds populating different areas in the country (Nafti et al 2014) may have been subjected crossbred to the effect of selection with positive/negative selection signature for some milk quality traits (Bertolini et al 2018).…”

Section: Basic Composition Of Ewes and Goat's Milkmentioning

confidence: 99%

“…Various breeds of goats are also widely distributed in the different oasis areas, composed of European and oriental breeds imported for milk aptitude (Alpine, Sannen, Murciana, Maltese) and meat aptitude (Boer, Damasquine, Hijazi…) (Vacca et al 2009). Finally, the most widespread goat is essentially the local population characterized by their great diversity and heterogeneity (Nafti et al 2014), high resistance to pathogens, and well adapted to the rather hard conditions (Ayeb et al 2016). The indigenous goat is raised within an extensive pastoral system and semi-intensive oasis system where animals are used for meat production and a substantial milking intended for local consumption (Vacca et al 2009) or transformation for local products occurs (Leben, D'hen, Rayeb…) (Gaddour et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Small ruminants milk from Tunisian oasis: physicochemical characteristics, mineral contents, and microbiological quality

Khaldi

Nafti

Jilani³

2021

Trop Anim Health Prod

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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), sulphitereducing 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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“…The dominant sheep breed is the Queue Fine de l'Ouest (QFO), known as "Bergui" or "Gharbi", which is dual-purpose (for milk and meat production), well adapted to dry areas, and reared in an extensive pastoral system (Khaldi et al 2020). The most widespread goat is essentially the local population characterized by its great diversity and heterogeneity (Nafti et al 2014), high resistance to pathogens, and good adaptation to rather hard conditions (Ayeb et al 2016). Indigenous goats are raised within an extensive pastoral system and semi-intensive oasis system where animals are used for meat production and substantial milking intended for local consumption (Vacca et al 2009) or transformation for local products occurs (Leben, D'hen, Rayeb…) (Gaddour et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Baseline composition and microbial quality assessment of raw milk from endemic small ruminants and Maghrebi camels in the oasis area of Tunisia

Khaldi¹,

Nafti²,

Jilani

2022

Preprint

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Characteristics and quality aspects of milk from native ovine queue fine de l’Ouest (QFO) and the local goat population were investigated and compared with those of the local Maghrebi camel. A total of 378 individual milk samples were collected from 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, and K) and microbiological features (total mesophilic aerobic bacteria (TMAB), total coliform 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 results obtained for milk characteristics revealed noticeable disparities between the three species. The mean values of pH, density, and acidity in milk collected from sheep appeared higher than those in milk collected from goat species. Compared to the camel populations, sheep species produced milk with similar pH but higher density and acidity. Between camel and goat species, pH and acidity were higher in Negga, while the density was similar. For milk composition, the results showed a remarkable variation among all studied species and an obvious superiority of the ovine species over the caprine and camel populations in all the chemical contents being studied, except for the casein-protein ratio, which is in favor of goat species. The milk of QFO sheep, the richest in casein and protein, was expressed with significantly higher levels of calcium and phosphorus than goat and camel milk. Compared to small ruminants, milk from camels is the richest in Na and K. Additionally, more Ca is present in milk from camels than goats. Goat milk, the poorest type of milk in Ca and Na, contains on average more P than camel milk and more K than sheep's milk. The poor bacteriological quality was that of camel milk for all microbial counts. The microbial quality of goat milk was higher than that of ewe milk based on TMAB, TCC, and E. coli counts, while ovine milk was of better quality, referring to LAB, Y/M, and S. aureus values. No significant differences were found for Staphylococcus aureus and Escherichia coli between the examined species. The obtained results highlighted the complete absence of the two dangerous pathogens Salmonella and CSR in all investigated milk samples. The microbiological examination evidenced that the milk of small ruminant species complies with standard criteria required by Tunisian legislation on the hygiene of milk and dairy products. Regarding camel milk, the microbial analysis revealed poor quality that exceeds standard criteria.

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Multivariate characterization of morphological traits in local Tunisian oases goats

Cited by 12 publications

References 17 publications

Morphometric characterization of Kacang goats raised in lowland and highland areas of Jambi Province, Indonesia

Morphometric characterization of Kacang goats raised in lowland and highland areas of Jambi Province, Indonesia

Small ruminants milk from Tunisian oasis: physicochemical characteristics, mineral contents, and microbiological quality

Baseline composition and microbial quality assessment of raw milk from endemic small ruminants and Maghrebi camels in the oasis area of Tunisia

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