Estimating lactation curves and seasonal effects for milk, fat and protein in Sarda dairy sheep with a test day model

Carta, Antonello; Sanna, S.R.; Casu, S.

doi:10.1016/0301-6226(95)00051-l

Cited by 57 publications

(38 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Bulk milk samples collected in months 5-7 of the lactation showed significantly higher TBC values (Figure 1). A seasonal variation of the quantity and the physicochemical properties of sheep milk has been previously described (Casoli et al, 1989;Carta et al,1995). Similar to our results, Gonzalo et al(1994) reported an effect of lactation stage on milk yield and SCC levels of the Churra dairy sheep.…”

Section: Conflict Of Interest Statementsupporting

confidence: 91%

See 1 more Smart Citation

Effect of management factors on reproductive and milk production performance of a dairy sheep breed adapted to low-input management systems

Tzanidakis

Voutzourakis

Stefanakis

et al. 2018

J Hellenic Vet Med Soc

View full text Add to dashboard Cite

Interest on the implementation and improvisation of low-input dairy sheep farming is rising. Our study aimed to describe a) the milk productivity of the Sfakia sheep, a Mediterranean well-adapted to low-input management schemes breed (“low-input breed”), and b) the effect of management (MS) and milking system (MLS) on milk yield and quality. Monthly bulk milk samples (n=307) and reproductive data were collected from 10 extensive and 10 semi-intensive Sfakia sheep flocks in Crete Greece, over two consecutive lactations. All semi-intensive and four extensive farms were equipped with a milking parlour machine (MPM). A portable machine (PM) was used in three extensive farms; hand-milking (HM) was applied in the rest extensive farms. The effect of MS and MLS on daily milk yield/ewe (DMY), somatic cell count (SCC), total bacterial count (TBC), pH and % lactose content (LACT) of milk was explored with linear mixed-effects models. Mean DMY (p<0.001) as well as the seasonal variation pattern of SCC (p=0.020) and LACT (p=0.018) differed between MS. TBC was higher in extensive farms using MPM than HM (p=0.002); PM was related to lower SCC, compared to MPM (p=0.044) and HM (p=0.012). Concluding, mild interventions in management and milking practices could improve the productivity of “low-input” dairy sheep breeds.

show abstract

Section: Conflict Of Interest Statementsupporting

confidence: 91%

“…J HELLENIC VET MED SOC 2017, 68(1) ΠΕΚΕ 2017, 68(1) (Carta et al, 1995). For the extensively bred ewes, the three milking methods applied (MPM, PM, HM) did not significantly affect the monthly variation patterns of SCC, TBC and DMY (Figures 2-4).…”

mentioning

confidence: 94%

Effect of management factors on reproductive and milk production performance of a dairy sheep breed adapted to low-input management systems

Tzanidakis

Voutzourakis

Stefanakis

et al. 2018

J Hellenic Vet Med Soc

View full text Add to dashboard Cite

show abstract

“…After the peak is achieved (more or less visible in dependence on the breed), the pattern with progressively decreasing daily milk yield until the end of lactation can be observed (see Alderman and Cottrill, 1995;Komprej et al, 2003;PeraltaLailson et al, 2005, for a comparison with dairy and suckler cows, Slovene sheep and black variety of Creole sheep). Contrariwise, Carta et al (1995) and Peralta-Lailson et al (2005) reported only a decreasing shape of lactation curve for Sarda dairy sheep and White and Brown varieties of Creole sheep.…”

Section: Resultsmentioning

confidence: 90%

Factors affecting milk yield and ewe's lactation curves estimated with test-day models

Oravcová¹,

Margetín²,

Peškovičová³

et al. 2006

Czech J. Anim. Sci.

View full text Add to dashboard Cite

Test-day records of purebred Tsigai, Improved Valachian and Lacaune ewes were analysed with a general linear model in order to investigate the effects of flock-test day, lactation number, days in milk, litter size and month of lambing. In total, 121 576 (Tsigai), 247 902 (Improved Valachian) and 2 196 (Lacaune) test-day records gathered over the period [1995][1996][1997][1998][1999][2000][2001][2002][2003][2004][2005] were included in the analyses. Average daily milk yields were 0.604 ± 0.279 kg (Tsigai), 0.595 ± 0.243 kg (Improved Valachian) and 1.053 ± 0.475 kg (Lacaune). The significant (P < 0.05) or highly significant (P < 0.01) effects of flock-test day, lactation number (except for Lacaune), days in milk, litter size (except for Lacaune) and month of lambing (either fixed effects or covariates) tested by Fisher's tests were shown. The model explained about 50% of daily milk yield variability, with coefficients of determination as follows: 0.479 for Improved Valachian; 0.487 for Tsigai; 0.537 for Lacaune. Differences in estimated least-squares means were tested using multiple-range Scheffe's tests. A lower daily milk yield was found for the first lactation, single litter and lactations starting in March in comparison with daily milk yield for the second and third lactations (except for Lacaune), multiple litter and lactations starting in January and February (except for Improved Valachian). AliSchaeffer regression adopted for sheep was used for the fitting of lactation curve according to breed.

show abstract

“…1). Casoli et al (1989), Ubertalle et al (1991), Fadel et al (1989), Duranti et al (1990), Marõ Áa and Gabin Äa (1993), Carta et al (1995), Hassan (1995) and Cappio-Borlino et al (1997). The three lactation types were found to differ in lipid synthesis levels.…”

Section: Effect Of Type Of Lactation and Stage Of Lactation On Milk Tmentioning

confidence: 91%

“…The breed itself is a factor in milk composition (Barillet, 1985;Sakul and Boylan, 1992) but within breeds the most signi®cant compositional variations are determined by the stage of lactation as shown by Casoli et al (1989), Marõ Áa andGabin Äa (1993), Delacroix-Buchet et al (1994), Gonzalo et al (1994), Carta et al (1995), Hassan (1995) and Cappio-Borlino et al (1997). Sheep have, moreover, a particular reproductive rhythm relating to individual breeds and to external factors of climate and breeding environment, and the seasonality of lambing, which is common to several breeds, often prevents the effects of stage of lactation, season, and nutrition from being distinguished separately (Pellegrini et al, 1994).…”

Section: Introductionmentioning

confidence: 99%

Evolution of chemical composition, somatic cell count and renneting properties of the milk of Massese ewes

Pugliese

Acciaioli

Rapaccini

et al. 1999

Small Ruminant Research

View full text Add to dashboard Cite

The experiment was carried out on 52 lactations of 37 multiparous Massese ewes. Because of the mating practice of the breed, three types of lactation were detected: Type 1, a short lactation initiated in autumn; Type 2, a short lactation initiated in spring, following the Type 1 lactation; Type 3, a long lactation initiated in autumn. Milk yield was recorded weekly, starting not before the eighth day from lambing. On a total 984 milk samples, contents of fat, protein, casein and lactose, SCC, pH and clotting parameters (R, K20 and A30) were determined. Data were analysed by a mixed model including lactation order, lactation type, DIM, and individual lactation as random effects. Protein and casein content increased from the second to ®fth lactation; the highest fat content was detected in the sixth lactation and over; milk of fourth lactation had higher SCC and worse renneting properties than that of second lactation. The pattern of evolution of parameters within the three types of lactation showed that the increase of nutrients with DIM was particularly noticeable for fat content in the Type 2 lactation (spring/short) which exhibited, at an average of 94 DIM, 1.5 percentage units above the other two types. Evolution of lactodynamographic parameters indicates that generally there was a substantial improvement in cheese-making suitability during the ®rst 2±3 months postpartum, and a worsening thereafter. The Type 2 lactation yielded milk with better renneting properties, particularly with respect to milk obtained during the same season from ewes that had an autumn delivery. This suggested that the newly started milk from the spring lactation could have a corrective effect on the total amount of bulk milk produced, a possible advantage for the Massese breed, which is characterised by a particularly pronounced deseasonalisation of lambings. #

show abstract

Estimating lactation curves and seasonal effects for milk, fat and protein in Sarda dairy sheep with a test day model

Cited by 57 publications

References 14 publications

Effect of management factors on reproductive and milk production performance of a dairy sheep breed adapted to low-input management systems

Effect of management factors on reproductive and milk production performance of a dairy sheep breed adapted to low-input management systems

Factors affecting milk yield and ewe's lactation curves estimated with test-day models

Evolution of chemical composition, somatic cell count and renneting properties of the milk of Massese ewes

Contact Info

Product

Resources

About