Comparison of different machine milking clusters on dairy ewes with large size teats

Fernández, N.; Requena, Raquel; Beltran, MC; Peris, C.; Rodríguez, M.; Molina, Pilar Gil; Torres, Audrey H

doi:10.1051/animres:19970302

Cited by 6 publications

(6 citation statements)

References 2 publications

(2 reference statements)

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“…1). The thickness (2.34 mm) and deflection (7.5 mm) of the lip were similar to those considered suitable (2 mm and 20 mm, respectively) by Fernández et al (1997). These authors found that mouthpiece lip deflection was more important than its diameter for a good milk fractionation during milking.…”

Section: Udder Morphology and Teat-cup Designsupporting

confidence: 52%

“…A high milk flow is also positive for good milkability because it improves milking efficiency. Milk flow during milking may be affected by udder morphology characteristics (Marnet et al, 2000), especially teat sphincter strength (Marnet et al, 2001), or the features of the cluster used, especially by the mouthpiece lip flexibility (Fernández et al, 1997). In addition, the variation of the possible combinations among the operating parameters of machine milking (vacuum level, pulsator rate and pulsator ratio) can also affect milk flows and milk fractioning (Fernández et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

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Milkability and milking efficiency improvement in Murciano-Granadina breed goats

Fernández

Martínez

Martí

et al. 2015

Small Ruminant Research

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The aim of this study was to verify the effect of cluster, udder characteristics and milking 21 parameters on milkability and milking efficiency of Murciano-Granadina breed goats, in 22 order to improve them. The cluster used is well adapted to the goats, except that the teat-floor 23 distance is too short for the teat-cup used and the cluster rests on the platform instead of 24 hanging from the udder, something apparently attributed to a poor udder conformation rather 25 than an excessively long teat-cup. Udder parameters studied are classified as medium or

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Section: Udder Morphology and Teat-cup Designsupporting

confidence: 52%

Section: Introductionmentioning

confidence: 99%

Milkability and milking efficiency improvement in Murciano-Granadina breed goats

Fernández

Martínez

Martí

et al. 2015

Small Ruminant Research

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“…Annual checking and regular maintenance of milking machines constitute basic measures insufficiently applied since only 40 to 60% of the total number of machines are checked annually. Mostly, the purpose of the investigations was to study the influence of machine parameters on milking efficiency [53,141].…”

Section: Limitation Of Receptivity and Sensitivitymentioning

confidence: 99%

“…On the contrary, milk retention must be reduced through adaptation of the equipment to animal yield, teat size and flock size [53]: vacuum pump capacity, vacuum reserve, claws volume and position with regards to the liners. Automatic cluster removal systems, when they exist, must be carefully set.…”

Section: Limitation Of Receptivity and Sensitivitymentioning

confidence: 99%

Mastitis of dairy small ruminants

et al. 2003

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-Staphylococci are the main aetiological agents of small ruminants intramammary infections (IMI), the more frequent isolates being S. aureus in clinical cases and coagulase negative species in subclinical IMI. The clinical IMI, whose annual incidence is usually lower than 5%, mainly occur at the beginning of machine milking and during the first third of lactation. These features constitute small ruminant peculiarities compared to dairy cattle. Small ruminant mastitis is generally a chronic and contagious infection: the primary sources are mammary and cutaneous carriages, and spreading mainly occurs during milking. Somatic cell counts (SCC) represent a valuable tool for prevalence assessment and screening, but predictive values are better in ewes than in goats. Prevention is most often based on milking machine management, sanitation and annual control, and milking technique optimisation. Elimination mainly relies on culling animals exhibiting clinical, chronic and recurrent IMI, and on drying-off intramammary antibiotherapy; this treatment allows a good efficacy and may be used selectively by targeting infected udders only. Heritability values for lactation mean SCC scores are between 0.11 and 0.15. Effective inclusion of ewe's mastitis resistance in the breeding goal has recently been implemented in France following experimental and large scale estimations of genetic parameters for SCC scores.ewe / goat / mastitis / somatic cell count / epizootiology

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“…Liner measurements were taken using a pair of callipers following the scheme described by Fernandez et al (1997). The touch point (TP) with the aid of a manual vacuum pump (Medition Precision S.L., Zaragoza, Spain), a digital vacuum gauge (DVPM-01, Delaval International AB., Tumba, Sweden) and a methacrylate cover.…”

Section: Methodsmentioning

confidence: 99%

Effects of overmilking and liner type and characteristics on teat tissue in small ruminants

Alejandro

Roca

Romero

et al. 2014

Journal of Dairy Research

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The aim of this work was to study the effect on teat wall thickness and canal length in sheep and goats of overmilking for 2 min (OM+2) and of milking with used (AL; +3000 milkings) and twisted (TL; 45°) liners in sheep and goats, as well as the effect of milking goats with liners designed for sheep (SL, shorter length and diameter than liners for goats). To this end, we performed four experiments in goats and three in sheep, in a Latin square design with two experimental periods. During the experimental period 4 controls were carried out, performing ultrasound scans before and immediately after milking to determine the teat wall thickness (TWT), teat wall area (TWA), teat end area (TEWA) and teat canal length (TCL). OM+2 caused a significant increase in TWT, TWA, TEWA and TCL in goats and in TWA, TEWA and TCL in sheep. Liner features had a strong influence on the variables studied; aged liners caused significant changes in TWT and TCL in goats and in TWT in sheep; twisted liners produced a significant effect on the increase of TWT and TCL in goats, without reaching significance level in sheep; and milking goats with sheep liners led to a significant increase in TWT, TWA, TEWA and TCL. In practice, it is therefore important to avoid overmilking and the use of worn-out liners. It is also necessary to use liners designed for the morphological features of each species, taking special care to carry out periodic liner positioning revisions to ensure the benefits of pulsation on the teat end. Finally, it would be necessary to carry out long-term experiments to study whether the increase in thickness observed in some experiments is sufficient to affect milking efficiency and mammary gland health status.

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Comparison of different machine milking clusters on dairy ewes with large size teats

Cited by 6 publications

References 2 publications

Milkability and milking efficiency improvement in Murciano-Granadina breed goats

Milkability and milking efficiency improvement in Murciano-Granadina breed goats

Mastitis of dairy small ruminants

Effects of overmilking and liner type and characteristics on teat tissue in small ruminants

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