A study of the composition of Clun Forest ewe's milk

Ashton, W. M.; Owen, J. B.; Ingleton, Jean W.

doi:10.1017/s0021859600015100

Cited by 28 publications

(30 citation statements)

References 14 publications

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“…The mean values of milk composition are within the ranges of values summarized by other workers (Barnicoat et al 1949;Ashton et al 1964). There were, however, substantial differences between suckling groups in the composition of their milks (Table 2, Fig.…”

Section: Discussionsupporting

confidence: 81%

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The yield and composition of the milk of Finnish Landrace × Blackface ewes: I. Ewes and lambs maintained indoors

1972

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Twenty-two Finnish Landrace x Blackface ewes suckling either single, twin, triplet or quadruplet lambs were maintained indoors during a 12-week lactation period. Milk production was estimated at weekly intervals by hand milking following oxytocin administration. Milk was collected from each ewe in four similar volumetric portions which were retained in order of withdrawal and analysed for maj or constituents. Weighted volumes of milk from each of the four portions were bulked to give a single sample for analysis. Estimated mean total milk production over a 12-week period from parturition was 134, 205, 212 and 218kg for single-, twin-,triplet-and quadruplet-suckled ewes respectively. Most of the difference in total yield between multiple-suckled groups of ewes occurred during the first 3 weeks of lactation, and the data indicate that the number of lambs born, or the total weight of concepta, influences the initial quantity of milk available to the lambs. Regression analysis showed significant evidence for difference between the linear components of the regression of milk yield, fat, protein, lactose and Gross Energy on the stage of lactation for all suckling groups. The concentration of all constituents other than lactose and ash was higher in colostral milk, but was significantly higher only in respect of fat, protein and Gross Energy. Substantial differences found between suckling groups in respect of fat and protein, content of the milks indicate an influence on these constituents due to the number of lambs suckled. The mean growth rates of the triplet-and quadruplet-suckled groups of lambs were each significantly lower than each of the single-and twin-suckled groups. The food intake of the ewes in relation to shape of lactation curves and consequent lamb growth is discussed. (1957) have shown that durunder similar conditions, Finnish Landrace x Black-ing the milking process, the fat content of cow's milk face ewes produce 70 % more lambs at birth than may rise from 1 to 2 % in the first drawn milk to pure-bred Blackface ewes. It is possible, therefore, 8-15 % in the last portion. In sheep, Rusev, that the genetic influence of the Finnish Landrace Georgiev & Tanev (1964) found that the fat content breed could be used to increase the number of lambs of the last 40 % of milk extracted may be double reared in the hill areas of Britain, particularly in that of the first 60 % withdrawn. It is probable, situations where the natural environment has been therefore, that some of the variation reported in improved. However, it is not known if this greater the constituent values of ewe's milk in the literature prolificacy is associated with an adequate capacity is due to differences in sampling technique, for milk production to sustain acceptable growth This paper is concerned with the yield and cornrates in litters of lambs. Donald, Read & Russell (1968) have shown that, Johansson & Claessonposition of ewe's milk and the variation in composiInformation from several sources, quoted by tion occurring at sequential stages ...

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Section: Discussionsupporting

confidence: 81%

“…Information is also presented on ewe Owen & Ingleton (1964) indicate substantial varia-responses and lamb growth as influenced by the tions in the average constituents of ewe's milk, number of lambs suckled. The data used in Part I were obtained from ewes and lambs maintained indoors.…”

mentioning

confidence: 99%

The yield and composition of the milk of Finnish Landrace × Blackface ewes: I. Ewes and lambs maintained indoors

1972

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“…The Al levels were also observed to increase in cows with mastitis (426). Al in milk obtained from pregnant cows (315) ewes (427), and buffalo (428) (431).…”

Section: August 1974mentioning

confidence: 99%

Aluminum in the Environment and Human Health

Sorenson¹,

Campbell²,

Tepper³

et al. 1974

Environmental Health Perspectives

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The review of over 800 references on aluminum (Al) published since the mid-fifties covers the occurrence of Al in soil, air, water, plants and food products, as well as air and water pollution problems. In addition, the existing quality criteria, the biology and toxicology of Al, and the therapeutic and medical uses are presented. It is concluded that absorption and retention or accumulation of Al in humans occurs at lower levels of intake than had been assumed formerly. However, levels of 5 to 50 times the normal daily intake do not appear to interfere with other metabolic processes. The adverse effects of Al reported in the more recent years resulted from the inhalation or ingestion of Al in concentrations many times greater than the amounts present under normal circumstances. As in the past, there is still no need for .ncern by the public or producers of Al or its products concerning hazards to human health derived from well established and extensively used products.

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“…Milk was obtained from six ewes by the procedure previously described (Ashton et al 1964). The ewes grazed during the lactation period and concentrate feeding was stopped before lambing.…”

Section: Methodsmentioning

confidence: 99%