Machine milking of Istrian dairy crossbreed ewes: udder morphology and milking characteristics

Džidić, Alen; Kapš, Miroslav; Bruckmaier, Rupert M.

doi:10.1016/j.smallrumres.2004.02.003

Cited by 40 publications

(27 citation statements)

References 10 publications

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“…The least frequency of occurrence was observed in PLII type of milk flow. This type of milk flow curve was observed seldom also in other breeds (Dzidic et al, 2004). Extremely weak or totally absent oxytocin release during milking is typical of the dairy sheep with PLII type of milk flow curves (Bruckmaier et al, 1997).…”

Section: Milk Flow Curves and Correlationsmentioning

confidence: 67%

The first observation of milkability of the sheep breeds Tsigai, Improved Valachian and their crosses with Lacaune

Mačuhová¹,

Uhrinčať²,

Mačuhová³

et al. 2008

CZECH J ANIM SCI

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The aim of this study was to evaluate the milkability of two purebred breeds Tsigai (TS, n = 14) and Improved Valachian (IV, n = 15), their crosses with Lacaune 50% TS × 50% LC (n = 13), 50% IV × 50% LC (n = 9) and purebred Lacaune (LC, n = 19). The measurements of the milk flow were performed on day 90 ± 10 of lactation during evening machine milking. The recording of milk flow was carried out by the equipment for graduated electronic recording of milk level in a jar in one-second intervals. The milk flow curves were classified into four types: 1 peak (1P), 2 peaks (2P), plateau I (maximal milk flow over 0.4 l/min (PLI)), plateau II (maximal milk flow less than 0.4 l/min (PLII)). The last two types refer to ewes with steady milk flow during milking. Udder morphology traits were measured (cisternal depth, teat angle) and subjectively assessed by the use of linear scores (cistern depth, teat position). The average total milk yield was 0.335 ± 0.043, 0.392 ± 0.042, 0.407 ± 0.042 l in purebred TS, IV, LC resp. and 0.397 ± 0.046, 0.434 ± 0.056 l in crosses TS × LC and IV × LC, resp. The frequency of occurrence of different types of milk flow /1P:2P:PLI:PLII/ was 27, 47, 22, 4%, resp. The highest milk yield was observed in ewes with PLI (0.481 ± 0.045 l), followed by 2P (0.401 ± 0.029 l) and 1P (0.293 ± 0.036 l) type of milk flow curve (P = 0.0112). An opposite effect was observed in the percentage of machine stripping yield where 1P had 41.94 ± 3.83%, 2P 21.29 ± 3.04% and PLI 15.90 ± 4.70% (P < 0.0001). LC and TS × LC, IV × LC had the more horizontal teat position than TS and IV. It can be supposed that at least during around 69% milkings the sheep released oxytocin in response to machine milking and that TS, IV and their crosses with LC also have a suitable potential for machine milking.

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Section: Milk Flow Curves and Correlationsmentioning

confidence: 67%

The first observation of milkability of the sheep breeds Tsigai, Improved Valachian and their crosses with Lacaune

Mačuhová¹,

Uhrinčať²,

Mačuhová³

et al. 2008

CZECH J ANIM SCI

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“…Najdi ewes had shorter teat length than Manchega, Lacaune, Istrian dairy crossbred and Bergamasca ewes (Rovai et al, 1999;Dzidic et al, 2004;Emediato et al, 2008), but in contrary, it had longer teat length than Sicilo-Sarde and Merino Rambouillet dairy ewes (Ochoa-Cordero et al, 2006;Ayadi et al, 2011). The teat lengths of Najdi ewes did not show any change throughout lactation, which is similar to the results reported by Ochoa-Cordero et al (2006) in Merino Rambouillet dairy ewes.…”

Section: Discussionmentioning

confidence: 99%

Evolution of udder morphology, alveolar and cisternal milk compartment during lactation and their relationship with milk yield in Najdi sheep

Ayadi

Matar

Aljumaah

et al. 2014

Span. j. agric. res.

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A total of 30 multiparous Najdi ewes were used to study the evolution of udder morphology traits and milk fractions in the udder during suckling (3rd, 6th, 9thwk) and milking (10th, 11th, 12thwk) periods. During suckling period, daily milk yield was estimated by using the double oxytocin injections method 4-h after milking. During milking period, ewes were hand-milked once daily. Udder and teat morphology traits for all ewes were measured 4-h after milking. Udder compartments were evaluated 8-h after milking by using atosiban and oxytocin; milk samples of each fraction were collected. Najdi ewes had a medium and healthy udders (CMT<1), with medium sized teats (length, 3.2±0.1 cm and width, 1.7±0.1 cm) attached at 35.7 ± 11º angle. Milk yield averaged 1.88±0.18 and 0.44±0.12 L d-1 during suckling and milking periods, respectively. A drop in milk yield (-75%, p<0.01) was found in the transition from suckling to milking. Udder traits, teats angle and width, and distance between teats declined (p<0.05) throughout lactation, whereas teat lengths did not show any change. Positive correlations (p<0.05) were observed between milk yield and udder depth (r=0.47-0.49), width (r=0.31-0.39) and distance between teats (r=0.26-0.39). The cisternal milk volumes decreased (p<0.05) after weaning, whilst the corresponding percentages increased (p<0.05). Cisternal milk accounted for 55% and 67% of the total udder milk during suckling and milking periods, respectively. Cisternal milk was positively correlated (r=0.93, p<0.05) with total milk yield. The percentages of protein and total solids in alveolar and cisternal milk increased significantly (p<0.05) after weaning, whilst fat percentages in cisternal milk did not change. In conclusion, the evaluated Najdi ewes showed medium sized cisterns and teats, which considered adequate for machine milking. Udder morphology traits had positive correlations with milk yield and hence, can be utilized in breeding programs.

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“…Bearing in mind the hygienic status of the flock, these traits of the udder should be an indication for culling of these sheep from the flock. Dzidic et al (2004) in their study stated that the capacity of the udder in Istrian ewes significantly affects the volume of milk production, milking time, average and peak milk flow rates, whereas the teat angle has a negative effect on all traits characterizing the course of machine milking in ewes). As it was reported by Peris et al (2003aPeris et al ( , 2003b, Murciano-Granadina goats rearing twins had a larger capacity of the udder (2.86 l) and a shorter teat-floor distance (23.57 cm) than in the case of nanny goats rearing single kids, where it was 1.60 l and 26.39 cm, respectively.…”

Section: Udder Morphology and Machine Milking Abilitymentioning

confidence: 96%

“…The values of genetic and phenotypic correlation coefficients between somatic cell counts and morphological traits of the udder suggest that some of the latter, such as e.g. the depth, shape and attachment of the udder, and the location and the size of teats, need to be taken into consideration in the evaluation of suitability of small ruminants for machine milking Peris et al, 1999;Dzidic et al, 2004;Legarra & Ugarte, 2005;Marie-Etancelin et al, 2005). In relation to the influence of many factors on bulk tank somatic cell counts (BTSCC) it seems justified to show the course and consequences of machine milking in small ruminants on milk quality and health of the teat end.…”

Section: Machine Milking Of Small Ruminants: a Reviewmentioning

confidence: 99%

The Course of Machine Milking in Small Ruminants

Olechnowicz¹

2012

Milk Production - An Up-to-Date Overview of Animal Nutrition, Management and Health

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Machine milking of Istrian dairy crossbreed ewes: udder morphology and milking characteristics

Cited by 40 publications

References 10 publications

The first observation of milkability of the sheep breeds Tsigai, Improved Valachian and their crosses with Lacaune

The first observation of milkability of the sheep breeds Tsigai, Improved Valachian and their crosses with Lacaune

Evolution of udder morphology, alveolar and cisternal milk compartment during lactation and their relationship with milk yield in Najdi sheep

The Course of Machine Milking in Small Ruminants

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