Journal articles: 'Lacaune sheep'

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Robles Jimenez, Lizbeth E., Juan C. Angeles Hernandez, Carlos Palacios, José A. Abecia, Anna Naranjo, Jorge Osorio Avalos, and Manuel Gonzalez-Ronquillo. "Milk Production of Lacaune Sheep with Different Degrees of Crossing with Manchega Sheep in a Commercial Flock in Spain." Animals 10, no. 3 (March 20, 2020): 520. http://dx.doi.org/10.3390/ani10030520.

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The objective of the present study was to evaluate the effect of the grade of crossbreeding (Lacaune x Manchega) and environmental factors on milk production in a commercial flock in Spain. A total of 5769 milk production records of sheep with different degrees of purity of the Lacaune breed crossed with Manchega were used as follows: 100% Lacaune (n = 2960), 7/8 Lacaune (n = 502), 13/16 Lacaune (n = 306), 3/4 (n = 1288), 5/8 Lacaune (n = 441) and 1/2 Lacaune: Manchega (n = 272). Additional available information included the number of parity (1 to 8), litter size (single or multiple), and the season of the year of lambing (spring, summer, autumn and winter). A mixed model was used to evaluate the level of crossbreeding and environmental factors on milk production. The 100% Lacaune sheep presented the highest milk production with respect to the F1 Lacaune x Manchega sheep (p < 0.01), showing that as the degree of gene absorption increases with the Manchega breed, it presents lower milk yield. The 100%, 13/16, and 3/4 Lacaune genotypes had the highest milk yields with respect to the 1/2 Lacaune/Manchega breed (p < 0.001). The Lacaune registered on average 181.1 L in a period adjusted to 160 days of lactation (1.13 L/ day). Likewise, the parity number, litter size, and season of lambing effects showed significant differences (p < 0.01). It was concluded that 13/16 and 3/4 Lacaune/Manchega ewes presented the highest milk yields with respect to the other crosses.

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Molina, E., A. Ferret, G. Caja, S. Calsamiglia, X. Such, and J. Gasa. "Comparison of voluntary food intake, apparent digestibility, digesta kinetics and digestive tract content in Manchega and Lacaune dairy sheep in late pregnancy and early and mid lactation." Animal Science 72, no. 1 (February 2001): 209–21. http://dx.doi.org/10.1017/s1357729800055703.

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AbstractTwo experiments were carried out with pregnant (experiment 1) and lactating ewes (experiment 2), to compare dry-matter (DM) intake, and total tract apparent digestibility, digesta kinetics and weight of digestive tract contents of Lacaune and Manchega sheep, with the aim of explaining possible differences between the breeds in voluntary food intake. In experiment 1, 20 3-year-old single-bearing pregnant ewes, 10 Manchega and 10 Lacaune, were permanently housed for the last 10 weeks of pregnancy. The diet used consisted of lucerne hay, offeredad libitum, supplemented with 0·3 kg/day of concentrate. DM and digestible DM intake per kg M0·75were higher (P< 0·01) in Lacaune than in Manchega sheep. Breed did not affect total tract apparent digestibility, fractional rates of passage, transit time, total mean retention time, or weight of digestive tract contents. Changes in body weight and body condition score were similar between breeds. In contrast, Lacaune lambs tended (P= 0·09) to weigh less than Manchega lambs, suggesting genetic differences in the energy utilization between breeds in late pregnancy. Higher DM intake observed in Lacaune sheep may have been related to a higher energy demand for mammary development. In experiment 2, 32 3-year-old lactating multiparous ewes, 16 Manchega and 16 Lacaune, were permanently housed during the first 12 weeks of lactation. The experimental diet used was based on a mixture of maize silage and dehydrated lucerne (10: 1, fresh weight basis), offeredad libitum, and supplemented with 0·8 kg/day of concentrate. Milk, fat and protein yield as well as DM and digestible DM intake in Lacaune ewes was higher (P< 0·01) than in Manchega ewes. DM intake was constant in Lacaune sheep with advancing lactation, while in Manchega sheep DM intake decreased. Throughout this period Lacaune ewes lost 0·5 kg of body weight while Manchega gained 4·4 kg. Breed did not affect either apparent digestibility of DM, organic matter and neutral-detergent fibre, or fractional rates of passage, transit time and total mean retention time. The weight of total tract digestive contents was greater (P< 0·05) in Lacaune than in Manchega sheep, particularly in the reticulo-rumen. Results suggest that the scheme of selection in Lacaune dairy sheep has increased milk yield together with voluntary food intake, the latter being associated with an increase in the rumen fill capacity. The higher milk yield of Lacaune ewes cannot be attributed to the higher DM intake only; other factors, i.e. mobilization of fat reserves, are required to support this higher milk output.

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BRUCKMAIER, RUPERT M., GEORG PAUL, HARALD MAYER, and DIETER SCHAMS. "Machine milking of Ostfriesian and Lacaune dairy sheep: udder anatomy, milk ejection and milking characteristics." Journal of Dairy Research 64, no. 2 (May 1997): 163–72. http://dx.doi.org/10.1017/s0022029997002173.

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Mammary cistern anatomy derived from ultrasound measurement, milk ejection in response to exogenous oxytocin and oxytocin release and milking characteristics with and without manual prestimulation in early (months 2–4) and late (months 5–8) lactation were investigated in Lacaune and Ostfriesian dairy ewes. Vertical ultrasound cisternal cross sections of the cisternal cavities did not differ in the two breeds, whereas the cisternal area fraction located lower than the exit into the teat channel was larger in Ostfriesian than in Lacaune sheep. The cisternal area enlarged within 1 min in response to i.v. oxytocin injection, indicating milk ejection. During milking, oxytocin concentrations in Lacaune generally increased dramatically within 0·5 min from the start of prestimulation or milking, whereas only slight or no oxytocin release was detected during milking without prestimulation in Ostfriesian ewes. Prestimulation induced oxytocin release in Ostfriesian sheep within 1–2 min after the start of milking, indicating delayed response to stimulation. Two peaked milk flow curves were observed when oxytocin release and milk ejection occurred only after removal of cisternal milk. This type of milk flow was more frequent in Ostfriesian than in Lacaune ewes and was reduced in both breeds by prestimulation, while the frequency of one peaked milk flow curves increased. During the course of lactation, milk yield, main milk fraction and milk flow rates decreased, while stripping yield was almost unchanged. Although milk yield was similar in both breeds, milk flow was lower and stripping yield was higher in Ostfriesian than in Lacaune ewes. We conclude that milk ejection in ewes occurred in response to elevated oxytocin concentrations. In Ostfriesian ewes reduced and delayed oxytocin response to teat stimulation resulted in milk ejection only during stripping. Therefore, and probably because a larger volume of the cistern was located below the teat exit in the Ostfriesian breed, stripping yield was higher in Ostfriesian than in Lacaune sheep.

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Duchemin, S. I., C. Colombani, A. Legarra, G. Baloche, H. Larroque, J. M. Astruc, F. Barillet, C. Robert-Granié, and E. Manfredi. "Genomic selection in the French Lacaune dairy sheep breed." Journal of Dairy Science 95, no. 5 (May 2012): 2723–33. http://dx.doi.org/10.3168/jds.2011-4980.

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Drouilhet, L., F. Lecerf, L. Bodin, S. Fabre, and P. Mulsant. "Fine mapping of theFecLlocus influencing prolificacy in Lacaune sheep." Animal Genetics 40, no. 6 (December 2009): 804–12. http://dx.doi.org/10.1111/j.1365-2052.2009.01919.x.

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Yuan, Zehu, Wanhong Li, Fadi Li, and Xiangpeng Yue. "Selection signature analysis reveals genes underlying sheep milking performance." Archives Animal Breeding 62, no. 2 (August 8, 2019): 501–8. http://dx.doi.org/10.5194/aab-62-501-2019.

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Abstract. Sheep milk is the most important feed resource for newborn lambs and an important food resource for humans. Sheep milk production and ingredients are influenced by genetic and environmental factors. In this study, we implemented selection signature analysis using Illumina Ovine SNP50 BeadChip data of 78 meat Lacaune and 103 milk Lacaune sheep, which have similar genetic backgrounds, from the Sheep HapMap project to identify candidate genes related to ovine milk traits. Since different methods can detect different variation types and complement each other, we used a haplotype-based method (hapFLK) to implement selection signature analysis. The results revealed six selection signature regions showing signs of being selected (P<0.001): chromosomes 1, 2, 3, 6, 13 and 18. In addition, 38 quantitative trait loci (QTLs) related to sheep milk performance were identified in selection signature regions, which contain 334 candidate genes. Of those, SUCNR1 (succinate receptor 1) and PPARGC1A (PPARG coactivator 1 alpha) may be the most significant genes that affect sheep milking performance, which supply a significant indication for future studies to investigate candidate genes that play an important role in milk production and quality.

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Anton, I., A. Zsolnai, L. Fesús, S. Kukovics, and A. Molnár. "Survey of ß-Lactoglobulin and αS1-Casein polimorpbisms in Hungarian dairy sheep breeds and crosses on DNA level (short communication)." Archives Animal Breeding 42, no. 4 (October 10, 1999): 387–92. http://dx.doi.org/10.5194/aab-42-387-1999.

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Abstract. Beta-lactoglobulin (LGB) and the Welsh αS1-casein (αS1-casein D) types have been determined using PCR-RFLP tests in DNA isolated from blood samples collected from four dairy sheep breeds (Awassi, British Milk Sheep, Tsigaia, Lacaune), from Hungarian Merinos and from various crossbreeds (AwassixMerino) F1, (MerinoxLanghe) F1, (MerinoxPleven Blackhead) F1, (MerinoxPleven Blackhead ) F1x Black East Friesian). The following LGBA frequency values have been obtained: Awassi 0.3478; British Milk Sheep 0.6857; Tsigaia 0.5650; Lacaune 0.4730; Hungarian Merino 0.6767; (Awassix Merino) F1 0.4694; (MerinoxLanghe) F1 0.7777; (MerinoxPleven Blackhead) F1 0.5945; (MerinoxPleven Blackhead) F1 x Black East Friesian 0.6026. The Welsh αS1-casein variant was found in the Hungarian Merino breed only (4 homozygous and 16 heterozygous ewes). Plans for studies on the possible effects of these milk protein types, on milk yield and composition as well as on cheese making properties ofmilk and cheese yields are outlined.

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Kukovics, S., A. Molnár, M. Ábrahám, T. Németh, and I. Komlósi. "Effects of udder traits on the milk yield of sheep." Archives Animal Breeding 49, no. 2 (October 10, 2006): 165–75. http://dx.doi.org/10.5194/aab-49-165-2006.

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Abstract. In order to determine the possible effects of udder traits on milk yield and milk composition a serial of experiments were carried out on five different sheep farms, between 1998–2000. Ten breeds and genotypes were included in these experiments: Merino, (Merino x Pleven Blackhead) F1, Pleven F1 x Black East Friesian, Lacaune, (Merino x Lacaune) F1, British Milksheep, (Merino x British Milksheep) F1, Awassi, (Merino x Awassi) F1, Milking Tsigai. The udder traits (type, size, teat size) were determined individually at the time of the first test milking, within two weeks after the weaning in each year. Milk yield was measured in every four weeks (morning and evening). Data collected were processed using LSLMW and MIXMDL (HARVEY, 1990) program. Differences among and within the genotypes in udder characteristics were summarised and presented in tables and figures.

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Deolindo, Guilherme Luiz, Vitor Luiz Molosse, Amanda Dilda, Lilian Kolling Girardini, Marcelo Vedovatto, Aleksandro Schafer da Silva, and Denise Nunes Araujo. "Lacaune ewes with subclinical mastitis: effects of intramammary application of própolis." Research, Society and Development 10, no. 2 (February 9, 2021): e18210211709. http://dx.doi.org/10.33448/rsd-v10i2.11709.

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The aim of this study was to evaluate the antimicrobial potential of the aqueous extract of green propolis in vitro against mastitis-causing and in vivo bacteria, evaluating the efficacy of treatment in Lacaune sheep. In the in vitro test, the minimum inhibitory concentration (MIC) was used; first, the MIC was obtained from the aqueous extract of green propolis for the strain of Staphylococcus. aureus ATCC 25523, defined as 1 mg/ml. For bacterial agents isolated from sheep with mastitis (Staphylococcus epidermidis, Staphylococcus intermedius, Staphylococcus hyicus, Corynebacterium spp. and Acinetobacter spp.), The concentration of 10 mg/ml was determined, while for Streptococcus equinus, Escherichia coli, and hemolytic E. coli, also isolated from sheep with mastitis, the concentration capable of reducing bacterial growth was 100 mg/ml. In the in vivo test, ten sheep were used, distributed in two treatments, five in the control group (CG) that received 2.5 ml of saline (vehicle), and five in the treated group (GT) that received 2.5 ml of aqueous (saline) propolis extract by the mammary route. The propolis dose tested (0.1 g/ml) was not effective for the treatment of mastitis, because the sheep remained positive in the racket test (CMT). The main microorganism isolated in the cases of mastitis in this study was Staphylococcus epidermidis. These results are preliminary; however, at the tested dose, the aqueous extract of green propolis delivered by the mammary route had no curative effect of mastitis.

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Slavova, S. "Estimation of the economic efficiency of Lacaune sheep farms, based on theoretical bio-economic models." Agricultural Science and Technology 13, Volume 13, Issue 2 (June 2021): 197–204. http://dx.doi.org/10.15547/ast.2021.02.032.

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Abstract. The aim of the present study was to develop theoretical bio-economic models of Lacaune sheep farms and establish their economic efficiency. Based on three main criteria, 15 options were considered and analyzed. Data were processed using the program EWSH2 as a part of ECOWEIGHT Package for calculating economic weights in livestock. Revenues from sales, variable costs, gross margin and profitability before and after subsidies and per ewe were calculated. It was found that raising sheep of the high productive Lacaune breed could generate profit and provide profitability for the studied models of farms, regardless of the level of selection, type of production system, flock size and even the amount of subsidies. Nucleus farms reported the largest gross margin, followed by the basic and commercial farms. Profitability without subsidies showed the highest values for the nucleus flocks of 1000 ewes – 24.24% when adopting semi-intensive production system and 23.14% for the intensive one. With the addition of subsidies, nucleus and basic farms of 1000 ewes were considered the most profitable with 40% and 37.37%, as for both options the semi-intensive conditions were preferable. A tendency for the values of the studied indicators to grow with the increase in the number of ewes in the flocks was observed, as only for the variable costs it was reversed. Due to the lack of studies on economic efficiency of Lacaune sheep farms in Bulgaria, an additional detailed research, based on real data, is advisable to be conducted.

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Oravcová, M., M. Margetín, D. Peškovičová, J. Daňo, M. Milerski, L. Hetényi, and P. Polák. "Factors affecting milk yield and ewe’s lactation curves estimated with test-day models." Czech Journal of Animal Science 51, No. 11 (December 5, 2011): 483–90. http://dx.doi.org/10.17221/3968-cjas.

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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 1995–2005 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). Ali-Schaeffer regression adopted for sheep was used for the fitting of lactation curve according to breed.

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De Carolis, Martina, Olimpia Barbato, Gabriele Acuti, Massimo Trabalza-Marinucci, Noelita Melo de Sousa, Claudio Canali, and Livia Moscati. "Plasmatic Profile of Pregnancy-Associated Glycoprotein (PAG) during Gestation and Postpartum in Sarda and Lacaune Sheep Determined with Two Radioimmunoassay Systems." Animals 10, no. 9 (August 25, 2020): 1502. http://dx.doi.org/10.3390/ani10091502.

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This study was carried out to determine ovine pregnancy-associated glycoprotein (oPAG) levels in the plasma of Sarda and Lacaune ewes throughout gestation and in the first month postpartum, using two heterologous radioimmunoassays (RIA-706 and RIA-srPool) and to study the correlations between PAG levels and fetal gender and number. On Day 18 of pregnancy, PAG concentrations were detected in 90.1% and 80.8% of Sarda pregnant ewes with RIA-706 and RIA-srPool, respectively; and in 90% and in 75% of Lacaune pregnant ewes with RIA-706 and RIA-srPool, respectively. From Day 30, PAG concentrations were detected in all pregnant ewes by using both RIA methods. In the postpartum period, the PAG concentrations in Sarda ewes decreased rapidly reaching minimal levels (<1 ng/mL) on day 28 using both RIA-706 and RIA-srPool. In Lacaune ewes, PAG-706 levels were higher than PAG-srPool from parturition until the last day of observation (Day 28 postpartum). It was also observed that mean concentrations were higher in multiple than in single pregnancies in Sarda and Lacaune ewes. Moreover, due to the rapid disappearance of PAG concentration following lambing, a cut-off limit in postpartum animals was not required as a means for detecting a new pregnancy.

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Baloche, G., A. Legarra, G. Sallé, H. Larroque, J. M. Astruc, C. Robert-Granié, and F. Barillet. "Assessment of accuracy of genomic prediction for French Lacaune dairy sheep." Journal of Dairy Science 97, no. 2 (February 2014): 1107–16. http://dx.doi.org/10.3168/jds.2013-7135.

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David, I., J. M. Astruc, G. Lagriffoul, E. Manfredi, C. Robert-Granié, and L. Bodin. "Genetic Correlation Between Female Fertility and Milk Yield in Lacaune Sheep." Journal of Dairy Science 91, no. 10 (October 2008): 4047–52. http://dx.doi.org/10.3168/jds.2008-1113.

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Zegeye, Zemenu Birhan, Nóra Vass, and Andualem Tomano. "Application of laparoscopic artificial insemination in conventional Lacaune sheep farm using frozen-thawed semen." Acta Agraria Debreceniensis, no. 2 (December 1, 2020): 133–38. http://dx.doi.org/10.34101/actaagrar/2/7113.

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The complex anatomical structure of the ewe reproductive tract accompanied with low quality of frozen ram semen for artificial insemination, resulted in a challenge with regard to using superior genotypes for reproductive ovine performance. Hence, improved genetics in ovine management has not been efficiently and widely used especially in undeveloped countries. Therefore, intrauterine semen deposition by laparoscopic insemination should be adopted in the current sheep production systems. Thus, this study aimed to assess the pregnancy rate and lambing rate of ewe inseminated by laparoscopic insemination techniques using frozen-thawed semen. The research used imported frozen semen from two rams of the Lacaune breed. Ewes were grouped according to age in years (1, 2 and 4). Before insemination, the semen was examined microscopically for its motility and viability and thereafter the laparoscopic artificial insemination technique was performed to 19 Lacaune breed ewes using frozen-thawed semen. The overall pregnancy and prolificacy rates were 31.57% and 42.10% respectively. Out of 2 ewes in the 1-year age group that were inseminated, only 1 ewe lambed representing 50%. However, from 16 ewes inseminated of four-year age group, 5 ewes lambed representing 31.25%. Significant difference based on age group was not evaluated due disproportionate of the data, (such that the data included 2 ewes in one-year-old age, 1 ewe in 2-year-old age and 16 ewes in 4-year-old age). Based on the ram semen, 33.33% and 30% of the inseminated ewes were pregnant from ram A and ram B semen respectively. However, in the case of prolificacy rate, 44.44% and 40 % of the ewes lambed from using semen of ram A and B, respectively. There was no significant difference (p>0.05) in pregnancy and prolificacy rates based on semen from the two rams. In conclusion, in this research study, ram semen had no significant effect on pregnancy and prolificacy rates using laparoscopic AI on Lacaune sheep. This could be due to the fact that the rams had very good quality semen. Evaluation of ram semen, accompanied with appropriate ewe selection based on age and rightful deposition of semen could lead to better and more consistent results. Overall this could contribute to the successful application of laparoscopic artificial insemination in Lacaune sheep production systems for enhanced productivity.

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Mačuhová, L., M. Uhrinčať, J. Mačuhová, M. Margetín, and V. Tančin. "The first observation of milkability of the sheep breeds Tsigai, Improved Valachian and their crosses with Lacaune." Czech Journal of Animal Science 53, No. 12 (December 22, 2008): 528–36. http://dx.doi.org/10.17221/369-cjas.

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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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HOFMANNOVÁ, MICHALA, JANA RYCHTÁŘOVÁ, ZUZANA SZTANKÓOVÁ, MICHAL MILERSKI, LUBOŠ VOSTRÝ, and ALENA SVITÁKOVÁ. "Association between polymorphism of ABCG2 gene and somatic cell count in Czech dairy sheep breeds." Medycyna Weterynaryjna 74, no. 8 (2018): 489–92. http://dx.doi.org/10.21521/mw.6110.

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In the Czech Republic, dairy sheep have traditionally been used as a dual-purpose species, generating income from both milk and meat. The functionality and health of the mammary gland are directly correlated with milk production, as well as with the hygiene and quality of milk and dairy products. Mastitis is one of the main infectious diseases in dairy sheep. One of the candidate genes that affect milk production traits is the ATP-binding cassette sub-family G member 2 (ABCG2) gene. The ABCG2 gene, a member of the ATP-binding cassette family, transports cytostatic and xenobiotic drugs across the cytoplasmic membrane. The study was based on 1747 records from 387 head of dairy sheep of the Lacaune breed (139) and the East Friesian breed (248). The analysis was performed by means of polymerase chain reactions (PCR). Genomic DNA was extracted from blood. Phenotype data used in the study were provided by the Association of Sheep and Goat Breeders in the Czech Republic (ASGB). We typed all three genotypes: DD, DI and II. In the Lacaune breed, the frequency of occurrence of the major D allele was 0.694, and the minor I allele had a frequency of occurrence of 0.306. In contrast, in East Friesian sheep the frequency of allele D was 0.216 and that of allele I was 0.784. Mutation c.683-80_46del in the intron 5 region of the ABCG2 gene confirmed the effect on somatic cell count in the dairy sheep population observed in this study. Further studies are needed to evaluate this possible association in other sheep breed populations. Mutation c.683-80_46del in intron 5 of the ABCG2 gene could be used as a candidate gene for somatic cell count..

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Santos, Michele dos, Marla Schneider, Cláudia Medeiros Rodrigues, Aline de Jesus da Silva, Luana Carolina Bachmann Gregolin, Maiara Garcia Blagitz, Alice Maria Melville Paiva Della Libera, et al. "Influence of lambing on the metabolic profile, neutrophil function and IgG levels in Lacaune sheep." Revista Agraria Academica 4, no. 1 (March 1, 2021): 55–68. http://dx.doi.org/10.32406/v4n12021/55-68/agrariacad.

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The objective of this study was to evaluate the metabolic profile, the activity of blood neutrophils, and the immunoglobulin G levels of primiparous and multiparous sheep (Lacaune breed) during the first 30 days after lambing. Fifteen primiparous ewes (GPR) and 15 multiparous ewes (GPM) were used. Evaluations were performed on the days of lambing and at three, seven, fifteen and thirty days post-lambing. In general, the basal and bactericidal activity of neutrophils were lower in GPR than in GPM. Phagocytosis was greater in the primiparous sheep in the initial moments after lambing. Non-esterified fatty acid concentrations were highest for GPM, indicating a negative energy balance in this group. The results obtained in this study allow us to conclude that primiparous sheep have higher neutrophil phagocytosis, while this cell type has higher bactericidal activity in multiparous sheep. Multiparous ewes presented with higher lipomobilization due to maintenance needs and higher milk production.

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Makovický, Pavol, Milan Margetín, and Peter Makovický. "Estimation of Genetic and Phenotypic Parameters for Udder Morphology Traits in Different Dairy Sheep Genotypes." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 65, no. 1 (2017): 105–10. http://dx.doi.org/10.11118/actaun201765010105.

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Knowledge of genetic parameters is the basis of sound livestock improvement programmes. Genetic parameters have been estimated for linear udder traits: Udder depth (UD), Cistern depth (CD), Teat position (TP), Teat size (TS) and external udder measurements: Rear udder depth (RUD), Cistern depth (CDe), Teat length (TL) and Teat angle (TA) – 1275 linear assessments (381 ewes) and 1185 external udder measurements (355 ewes) were included in the analysis for each character of 9 genotypes. Nine breeds and genotypes were included in these experiments: purebred Improved Valachian (IV), Tsigai (T), Lacaune (LC) ewes, and IV and T crosses with genetic portion of Lacaune and East Friesian (EF) – 25 %, 50 % and 75 %. Primary data were processed using restricted maximum likelihood (REML) methodology and the multiple‑trait animal model, using programs REMLF90 and VCE 4.0. High genetic correlations were found between UD and RUD (0.86), CD and CD(e) (0.93), TP and TA (0.90), TS and TL (0.94). The highest heritabilities were estimated for exact measurements of TL and CD (0.35–0.39) and subjectively assessed TA and TS (0.32 – 0.33).

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Martin, Pauline, Jérome Raoul, and Loys Bodin. "Effects of the FecL major gene in the Lacaune meat sheep population." Genetics Selection Evolution 46, no. 1 (2014): 48. http://dx.doi.org/10.1186/1297-9686-46-48.

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El Amiri, B., A. Karen, J. Sulon, N. Melo de Sousa, AV Alvarez-Oxiley, Y. Cognié, O. Szenci, and JF Beckers. "Measurement of Ovine Pregnancy-Associated Glycoprotein (PAG) During Early Pregnancy in Lacaune Sheep." Reproduction in Domestic Animals 42, no. 3 (June 2007): 257–62. http://dx.doi.org/10.1111/j.1439-0531.2006.00761.x.

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Barillet, F., D. Boichard, A. Barbat, J. M. Astruc, and B. Bonaiti. "Use of an animal model for genetic evaluation of the Lacaune dairy sheep." Livestock Production Science 31, no. 3-4 (June 1992): 287–99. http://dx.doi.org/10.1016/0301-6226(92)90023-w.

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Gruner, L., J. Cabaret, C. Sauve, and R. Pailhories. "Comparative susceptibility of romanov and lacaune sheep to gastrointestinal nematodes and small lungworms." Veterinary Parasitology 19, no. 1-2 (January 1986): 85–93. http://dx.doi.org/10.1016/0304-4017(86)90035-x.

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Lezmi, Stéphane, Frédéric Ronzon, Anna Bencsik, Alexandre Bedin, Didier Calavas, Yves Richard, Stéphanie Simon, Jacques Grassi, and Thierry Baron. "PrP(d) accumulation in organs of ARQ/ARQ sheep experimentally infected with BSE by peripheral routes." Acta Biochimica Polonica 53, no. 2 (June 12, 2006): 399–405. http://dx.doi.org/10.18388/abp.2006_3355.

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To study the pathogenesis of bovine spongiform encephalopathy infection in small ruminants, two Lacaune sheep with the AA136RR154QQ171 and one with the AA136RR154RR171 genotype for the prion protein, were inoculated with a brain homogenate from a French cattle BSE case by peripheral routes. Sheep with the ARQ/ARQ genotype are considered as susceptible to prion diseases contrary to those with the ARR/ARR genotype. The accumulation of disease-associated prion protein (PrP(d)) was analysed by biochemical and immunohistochemical methods. No PrP(d) accumulation was detected in samples from the ARR/ARR sheep 2 years post inoculation. In the two ARQ/ARQ sheep that had scrapie-like clinical symptoms, PrP(d) was found in the central, sympathetic and enteric nervous systems and in lymphoid organs. Remarkably, PrP(d) was also detected in some muscle types as well as in all peripheral nerves that had not been reported previously thus revealing a widespread distribution of BSE-associated PrP(d) in sheep tissues.

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Fésüs, László, Attila Zsolnai, István Anton, and László Sáfár. "Breeding for scrapie resistance in the Hungarian sheep population." Acta Veterinaria Hungarica 56, no. 2 (June 1, 2008): 173–80. http://dx.doi.org/10.1556/avet.56.2008.2.4.

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The first results of the Hungarian sheep prion protein (PrP) genotyping programme are discussed in this paper. To obtain initial genotype frequency data 10 commercial (Hungarian Merino, German Mutton Merino, Merino Landschaf, German Blackheaded, Suffolk, Texel, Ile de France, Charollais, Lacaune, British Milksheep) and 4 indigenous (Gyimes Racka, Hortobágy Racka, Tsigaja, Cikta) breeds were sampled in 2003 and 2004, and the PrP genotypes were determined by microsequencing analysis with capillary electrophoresis. In all commercial breeds, a higher number of sheep were genotyped in 2005 (3648) and in 2006 (3834) within the breeding programme to increase scrapie resistance, and the estimated frequency data were compared to the initial figures to evaluate the efficiency of selection. The new developments arising from the identification of the so-called ‘atypical’ scrapie cases are also discussed.

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Pavol, Makovický, Makovický Peter, Nagy Melinda, Rimárová Kvetoslava, and Diabelková Jana. "Genetic Parameters for Somatic Cell Count, Logscc and Somatic Cell Score of Breeds: Improved Valachian, Tsigai, Lacaune and their Crosses/Genetski Parametri Za Broj Somatskih Ćelija, Logscc I Skor Somatskih Ćelija Kod Rasa: Poboljšana Vlaška, Cigaja, Lakon I Njihovih Meleza." Acta Veterinaria 64, no. 3 (September 1, 2014): 386–96. http://dx.doi.org/10.2478/acve-2014-0037.

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Abstract In the last few years there has been increasing emphasis on reducing milk somatic cell count to improve the milk quality in dairy ruminants. Genetic parameters for somatic cell count (SCC), LOGSCC and somatic cell score (SCS) were estimated. About 1193 measurements were included in the analysis for each character of 358 ewes of 9 genotypes. Nine breeds and genotypes were included in these experiments: purebred Improved Valachian (IV), Tsigai (T), Lacaune (LC) ewes, and IV and T crosses with a genetic portion of Lacaune and East Friesian (EF) - 25 %, 50 % and 75 %. Primary data were processed using restricted maximum likelihood (REML) methodology and the multi-trait animal model, using programs REMLF90 and VCE 4.0. Heritability coefficients for somatic cell count were low: h2=0.03, for LOGSCC h2= 0.08 and for somatic cell score h2=0.06. Somatic cell score can be considered for inclusion in a breeding program aimed at reducing somatic cell count and frequency of clinical mastitis in dairy sheep.

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Elvira, Laura, Fernando Hernandez, Pedro Cuesta, Santiago Cano, Juan-Vicente Gonzalez-Martin, and Susana Astiz. "Factors affecting the lactation curves of intensively managed sheep based on a clustering approach." Journal of Dairy Research 80, no. 4 (September 4, 2013): 439–47. http://dx.doi.org/10.1017/s0022029913000381.

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This study investigated factors affecting milk production and lactation curves from complete lactations of Lacaune dairy sheep. Animals were part of a single flock under intensive management and were milked twice daily starting at lambing. The results of the analyses of 7788 complete lactations showed an average total milk yield of 434±183 l from lactations 234±63 d long, with an average lambing interval of 302±65 d. A Pollott additive mathematical model was used to estimate complete lactation curves. Clustering analysis identified four lactation types among Lacaune dairy sheep differing mainly in productivity i.e. milk yield per lactation (MY) and length of lactation (DIM). The so-called SL type involved short, less productive lactations (n=2137; 27·4%; MY=222±75·5 l and DIM=182±52·9 d). The SN type involved short lactations of normal productivity (n=2039; 26·2%; MY=396±73·7 l and DIM=205±33·1 d). The LP type involved long and productive lactations (n=2169; 27·9%; MY=487±70·5 l and DIM=265±40·7 d), while the LVP type included long and extremely productive lactations (n=1443; 18·5%; MY=694±114·0 l and DIM=295±54·7 d). Sheep showing the best lactation curves were usually younger than other sheep, and they had higher yield during the previous lactation, a shorter previous dry period (55±50·4 for LP and 61±55·0 d for LVP types) and longer lambing intervals. In addition, they tended to be born in September and to lamb in March, October and December. Sheep were remarkably stable in their lactation curve behaviour: the curve type observed for the first lactation was highly likely to persist in subsequent lactations (P<0·0001). These results suggest that farmers can use the shape of the first lactation curve to guide their selection of ewes for breeding and retention on the farm, thereby improving flock productivity.

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Lianou, Daphne T., Charalambia K. Michael, Natalia G. C. Vasileiou, Dimitra V. Liagka, Vasia S. Mavrogianni, Mariangela Caroprese, and George C. Fthenakis. "Association of Breed of Sheep or Goats with Somatic Cell Counts and Total Bacterial Counts of Bulk-Tank Milk." Applied Sciences 11, no. 16 (August 10, 2021): 7356. http://dx.doi.org/10.3390/app11167356.

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The objective was to describe potential associations of somatic cell counts (SCC) and total bacterial counts (TBC) in bulk-tank milk from sheep and goat farms with breeds of these animals in Greece. In total, 325 dairy sheep flocks and 119 dairy goat herds were visited for the collection of milk; the breed of animals in farms was evaluated for a potential association with SCC or TBC. The most frequently seen sheep breeds were the Lacaune (95 flocks) and the Chios (44 flocks). The most frequently seen goat breeds were the indigenous Greek (Capra prisca) (50 herds) and the Murciano-Granadina (13 herds). In a multivariable analysis, the breed and the application of machine-milking in sheep flocks, and the breed and the management system in goat herds emerged as significant factors for increased SCC (>0.75 × 106 cells mL−1) in bulk-tank milk. Further, the month of lactation at sampling in sheep flocks emerged a significant factor for increased TBC (>1500 × 103 cfu mL−1) in bulk-tank milk.

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Hernandez, Fernando, Laura Elvira, Beatriz Fernández, Marta Egea, Antonio Gonzalez-Bulnes, Juan V. Gonzalez-Martin, and Susana Astiz. "Effects of intramammary antibiotic therapy during the dry period on the performance of Lacaune dairy sheep under intensive management." Journal of Dairy Research 82, no. 1 (December 3, 2014): 95–101. http://dx.doi.org/10.1017/s0022029914000673.

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Often the only way to ensure profitability of Lacaune dairy sheep is intensive management, which requires appropriate dry-period treatment to ensure animal productivity and health. The present study aimed to investigate the effects of intramammary antibiotic dry therapy on the performance and health of Lacaune sheep under intensive management. We recorded data for 5981 complete lactation periods that followed a dry period. A total of 2402 lactation periods were preceded by a dry period involving intramammary administration of 300 mg of cephapirin benzathine (antibiotic group) and 3579 lactation periods were preceded by dry periods with no treatment (control group). The following on-farm yield data were collected for individual lactation periods: length of the subsequent lactation period; total milk yield per lactation period; daily milk yield and length of the subsequent dry period. Data on confounding factors that might affect productivity were also recorded, including the individual ewe, number of lactation periods and length of the previous dry period. Milk quality was assessed using data on somatic cell count (SCC) and content of protein and fat taken from the Spanish National Official Milk Yield Recording System. Antibiotic dry therapy significantly improved total yield per lactation period, which was 429±151·1 l in the antibiotic group and 412±165·5 l in the control group, as well as the daily milk yield, which was 1986±497·0 and 1851±543·2 ml/d, respectively (both P<0·0001). The initial dry period was significantly longer in the antibiotic group than in the control group, and dry period length correlated inversely with yield variables such us total yield per lactation period (r=−0·055; P<0·0001) and yield per day in milk (r=−0·039; P<0·0001). As a result, milk yield records systematically underestimated the positive effects of antibiotic dry therapy. Antibiotic dry therapy also significantly improved milk quality. Milk from the antibiotic group showed 50% lower SCC (573±1326 vs. 1022±2126 cells/ml; P<0·0001) and slightly higher content in fat (7·33±0·91 vs. 7·15±0·87%) and protein (5·63±0·44 vs. 5·44±0·4%). The results of this study suggest that cephalosporin dry therapy of Lacaune dairy sheep increases milk production and improves milk quality during subsequent lactation periods.

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Vršková, Martina, Vladimír Tančin, Michal Uhrinčať, Lucia Mačuhová, and Kristína Tvarožková. "Survey of somatic cell counts and milk composition in bulk milk of ewes in dairy practice." Potravinarstvo Slovak Journal of Food Sciences 15 (March 28, 2021): 151–55. http://dx.doi.org/10.5219/1325.

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We evaluated milk quality during the sheep dairy period in the year 2018. The study was performed at fifteen dairy farms with differed breeds and crossbreds under Slovakian usual practical conditions (milking and pasture). At the first and seventh farm purebred Tsigai (TS) ewes were kept, at the eight to twelve farm there were purebred Lacaune ewes (LC) and the thirteen farm were kept crossbred Improved Valachian x Lacaune ewes (IV/LC, with a higher proportion of Improved Valachian), the fourteen farm crossbred Lacaune x East Friesian ewes and the last farm were ewes of the synthetic population of Slovak dairy ewe (SD). The milk yield recording and milk sampling were performed once a month during evening milking as a part of milk recording services. The basic milk composition was determined by MilkoScan FT120 (Foss, Hillerød, Denmark) and somatic cell count was determined using a Fossomatic 90 (Foss Electric, Hillerød, Denmark) after heat treatment at 40 °C for 15 min. We found the highest incidence of SCC on farm 14 with crossbred LC/EF 3.940 x 103 cells.mL-1. Followed by farms 12 and 9 with purebred LC (SCC value of 3.318 and 2.489 x 103 cells.mL-1). Farm 7 with purebred TS reached the lowest value (831 x 103 cells.mL-1). The highest fat content was reached by the purebred TS, with gradual growth from March to July. Crossbreds and the synthetic population of Slovak dairy ewe (SD) had the lowest average fat content, which could be affected by feeding. Similar tendencies were found in protein content.

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Elvira, L., F. Hernandez, P. Cuesta, S. Cano, J. V. Gonzalez-Martin, and S. Astiz. "Accurate mathematical models to describe the lactation curve of Lacaune dairy sheep under intensive management." Animal 7, no. 6 (2013): 1044–52. http://dx.doi.org/10.1017/s175173111200239x.

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Oravcová, M., M. Margetín, D. Peškovičová, J. Daňo, M. Milerski, L. Hetényi, and P. Polák. "Factors affecting ewe’s milk fat and protein content and relationships between milk yield and milk components." Czech Journal of Animal Science 52, No. 7 (January 7, 2008): 189–98. http://dx.doi.org/10.17221/2274-cjas.

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Test-day records of purebred Tsigai, Improved Valachian and Lacaune ewes were used to analyse the effect of environmental factors on milk fat and protein content. There were 121 424 and 121 158 measurements of fat and protein content for Tsigai, 247 742 and 247 606 measurements of fat and protein content for Improved Valachian and 2 194 measurements of fat and protein content for Lacaune ewes lambing between 1995 and 2005. Overall means and standard deviations for fat and protein content were 7.77 ± 1.606% and 5.94 ± 0.690% for Tsigai, 7.48 ± 1.446% and 5.82 ± 0.620% for Improved Valachian, and 6.97 ± 1.514% and 5.62 ± 0.692% for Lacaune. For fat content, analyses showed a highly significant (P < 0.01) effect of flock-test day and a highly significant (P < 0.01) or significant (P < 0.05) effect of the month of lambing, with the only exception of the month of lambing in Lacaune. The effect of litter size was highly significant (P < 0.01) or significant (P < 0.05) in Improved Valachian and Lacaune. For protein content, analyses showed a highly significant (P < 0.01) effect of flock-test day and a highly significant (P < 0.01) or significant (P < 0.05) effect of the month of lambing. The effect of litter size was highly significant (P < 0.01) in Tsigai and Improved Valachian. Covariates of days in milk which modelled the shape of lactation curves were insignificant, except for Improved Valachian fat content (Ali-Schaeffer regression adopted for sheep). The model explained about 50% of fat and protein variation in the breeds, with coefficients of determination between 0.517 and 0.587 for fat content and between 0.495 and 0.527 for protein content. Fat and protein content were almost equally correlated with milk yield in the three breeds. Lactation curves were constructed on the basis of solutions of a statistical model employed in the analyses.

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Guo, Xiaofei, Xiangyu Wang, Benmeng Liang, Ran Di, Qiuyue Liu, Wenping Hu, Xiaoyun He, Jinlong Zhang, Xiaosheng Zhang, and Mingxing Chu. "Molecular Cloning of the B4GALNT2 Gene and Its Single Nucleotide Polymorphisms Association with Litter Size in Small Tail Han Sheep." Animals 8, no. 10 (September 20, 2018): 160. http://dx.doi.org/10.3390/ani8100160.

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A new fecundity gene named the FecL (mutation), which regulates the ovulation rate, was discovered in French Lacaune sheep. The B4GALNT2 (beta-1, 4-N-acetyl-galactosaminyl transferase 2) gene was considered as the potential FecL mutation gene. This study explores whether the effect of the FecL mutation exists in other sheep breeds, and the features of the B4GALNT2 gene in terms of the molecular structure and its expression profile. Using Sanger sequencing, we found that high and low fecundity breeds from among 11 measured sheep breeds all had no variation in the three specific mutation sites, which were linked with the FecL mutation. However, two mutations of g.36946470C > T and g.36933082C > T in the exon of B4GALNT2 had a significant effect on litter size in the first parity for Small Tail Han (STH) Sheep (p < 0.05). Two transcription start sites (TSS) of B4GALNT2 in its 5′-flanking region were discovered in ovine granule cells in vitro, through the RACE (Rapid amplification of cDNA ends) method. Except for in the kidney and oviduct, no significant difference in expression levels had been found between STH sheep and Tan sheep breeds. The B4GALNT2 gene, as a candidate for FecL, may have a relationship with the differences in litter size in STH sheep. B4GALNT2 is mainly expressed in the ovine ovary, which also suggests that B4GALNT2 plays an important role in sheep reproduction.

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Sá, Hemilly Cristina Menezes, Iran Borges, Gilberto De Lima Macedo Junior, Felipe Santiago Santos, Luigi Francis Lima Cavalcanti, Flávio Augusto Pereira Alvarenga, Tássia Ludmila Teles Martins, and Joana Palhares Campolina. "Evaluation of dairy sheep lambs supplemented with crude glycerin conveyed in water during pregnancy and lactation." Semina: Ciências Agrárias 38, no. 4Supl1 (August 25, 2017): 2681. http://dx.doi.org/10.5433/1679-0359.2017v38n4supl1p2681.

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The aim of this study was to evaluate the influence of crude glycerin (CG) suplementation in sheep diets during pregnancy and transition period. Twenty-four Lacaune x East Friesian genotypes sheep were randomly assigned to four treatments. Diet was composed of roughage: tifton hay, and standard concentrate for the categories, being these similar among the treatments, whereas the CG differed for the supplements in (zero, 1,5, 3,0 and 4,5% of dry matter) being It added to the animals’ drinking water. The sheep received supplementation during all pregnancy and lactation. Dry matter intake during gestation was reduced with the higher supplementation of CG in the animals’ drinking water, presenting a linear decreasing response and remaining until delivery. Throughout lactation, the variable presented a linear behavior with the supplementation of CG on the eighteenth day of this phase, after a quadratic behavior was observed until the end of the evaluated period. The beta-hydroxybutyrate and non-esterified fatty acids levels were not influenced by CG supplementation throughout the gestation period. CG suplementation conveyed in water did not affect negatively milk production and composition.

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Sá, Hemilly Cristina Menezes, Iran Borges, Gilberto De Lima Macedo Junior, Felipe Santiago Santos, Luigi Francis Lima Cavalcanti, Flávio Augusto Pereira Alvarenga, Tássia Ludmila Teles Martins, and Joana Palhares Campolina. "Evaluation of dairy sheep lambs supplemented with crude glycerin conveyed in water during pregnancy and lactation." Semina: Ciências Agrárias 38, no. 4Supl1 (August 25, 2017): 2681. http://dx.doi.org/10.5433/1679-0359.2017v38n4suplp2681.

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The aim of this study was to evaluate the influence of crude glycerin (CG) suplementation in sheep diets during pregnancy and transition period. Twenty-four Lacaune x East Friesian genotypes sheep were randomly assigned to four treatments. Diet was composed of roughage: tifton hay, and standard concentrate for the categories, being these similar among the treatments, whereas the CG differed for the supplements in (zero, 1,5, 3,0 and 4,5% of dry matter) being It added to the animals’ drinking water. The sheep received supplementation during all pregnancy and lactation. Dry matter intake during gestation was reduced with the higher supplementation of CG in the animals’ drinking water, presenting a linear decreasing response and remaining until delivery. Throughout lactation, the variable presented a linear behavior with the supplementation of CG on the eighteenth day of this phase, after a quadratic behavior was observed until the end of the evaluated period. The beta-hydroxybutyrate and non-esterified fatty acids levels were not influenced by CG supplementation throughout the gestation period. CG suplementation conveyed in water did not affect negatively milk production and composition.

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Dupuy, Jacques, Gilberte Larrieu, Jean Pierre Braun, Michel Alvinerie, and Pierre Galtier. "Differential effects of phenobarbital on the constitutive and inducible expression of P450 2B and 3A subfamilies in sheep tissues." Canadian Journal of Physiology and Pharmacology 79, no. 10 (October 1, 2001): 848–53. http://dx.doi.org/10.1139/y01-063.

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The activity and expression of cytochromes P450 were determined in liver, kidneys, lungs, duodenum, jejunum, ileum, and caecum of adult Lacaune sheep. High expression of total P450, benzphetamine and erythromycin demethylase activities, and P450 2B isoforms, as two distinct proteins that were detected and called P4502 Bm and P4502 Bx, was found in the lungs (in addition to liver). By contrast, the P450 3A subfamily was only expressed in liver and duodenal mucosa of untreated sheep. Phenobarbital (PB) treatment led to significant increases in all measured hepatic parameters and in total P450 of each investigated organ with the exception of ileum and caecum. Benzphetamine demethylase activity increased in liver and kidneys, correlating with the expression of the two P450 2B proteins, which were also induced in duodenum and ileum. By contrast, benzphetamine demethylase activity and expression of the P450 2B isoforms in lungs were unchanged by PB treatment. Erythromycin demethylation activity and P450 3A subfamily expression was increased only in liver of PB-treated sheep.Key words: phenobarbital, sheep, cytochromes P450, inducibility, tissue distribution.

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Tonamo, Andualem, István Komlósi, László Varga, Levente Czeglédi, and Ferenc Peles. "Bacteriological Quality of Raw Ovine Milk from Different Sheep Farms." Animals 10, no. 7 (July 9, 2020): 1163. http://dx.doi.org/10.3390/ani10071163.

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The primary purpose of this research was to examine the bacteriological properties of raw ovine milk produced by Merino, Tsigai, Dorper, Lacaune, and British Milk Sheep flocks on four sheep farms located in the eastern part of Hungary. In addition to individual raw milk (IRM) and bulk tank milk (BTM) samples, the udder surface (US) of ewes was also tested for bacteriological quality. A total of 77 US, 77 IRM, and 10 BTM samples were collected in the early morning during regular milking sessions. The samples, kept cooled at temperatures below 4 °C, were delivered to the microbiological laboratory and were examined immediately. The relatively low numbers of bacteria in both US and IRM samples reflected good housing conditions of ewes kept on the four farms studied. However, BTM samples had up to 3.5–4.0 log10 CFU/mL higher mean bacterial counts than their IRM counterparts, and the mean levels of bacteria in BTM on two farms even exceeded the regulatory limit of 6.18 log10 CFU/mL. Further studies need to be performed to clarify this issue.

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Hernandez, Fernando, Laura Elvira, Juan-Vicente Gonzalez-Martin, Antonio Gonzalez-Bulnes, and Susana Astiz. "Influence of age at first lambing on reproductive and productive performance of Lacaune dairy sheep under an intensive management system." Journal of Dairy Research 78, no. 2 (March 4, 2011): 160–67. http://dx.doi.org/10.1017/s0022029911000033.

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The present study investigated the effect of age at first lambing (AFL) on the performance of Lacaune sheep under intensive management conditions. Records from 3088 maiden sheep from one farm, for the period 2005–2010, were classified into four experimental groups: group E (early) ewes with AFL ⩽390 d; group M (middle) with AFL of 391–450 d; group L (late) with AFL of 451–510 d; and group A (aged) with AFL ⩾511 d. The higher the number of lactations, the lower were the yield/lactation and yield/Day in Milk. Ewes from group M up to 450 days old lambed 0·2 times more often and had 0·25 more lactations than the ewes from group L; in addition, the former group lambed 0·5 times more often and had 0·49 more lactations than ewes from group A. Group A had the lowest yield per lifetime; the yield followed the sequence: group E (1032 l) >group M (1051 l) >group L (989 l) > group A (859 l) (P<0·0001). Yield/lactation was affected by AFL during the first three lactations (P<0·05). Group E produced significantly less milk in the first lactation than ewes from groups M, L and A. AFL correlated negatively with the number of lactations in life (r= −0·26; P<0·0001) and with total milk yield (r= −209; P<0·0001). The productive performance between the ewes that reached puberty early (n=404) or late (n=2684) in life were different (P<0·0001) with the early sheep having a lower total milk yield (591 v. 1073 l, P<0·0001). In conclusion, the current study indicates that the optimal AFL for the Lacaune breed under an intensive dairy system is between 390 and 450 d. Ewes with AFL earlier than 390 d or later than 450 d are likely to have a shorter productive life and a lower lifetime milk production.

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Makovický, Pavol, Melinda Nagy, and Peter Makovick ý. "Comparison of external udder measurements of the sheep breeds Improved Valachian, Tsigai, Lacaune and their crosses." Chilean journal of agricultural research 73, no. 4 (December 2013): 366–71. http://dx.doi.org/10.4067/s0718-58392013000400006.

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Barillet, F., C. Marie, M. Jacquin, G. Lagriffoul, and J. M. Astruc. "The French Lacaune dairy sheep breed: use in France and abroad in the last 40 years." Livestock Production Science 71, no. 1 (September 2001): 17–29. http://dx.doi.org/10.1016/s0301-6226(01)00237-8.

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Bruckmaier, R. M., G. Paul, H. Mayer, and D. Schams. "30. Machine milking of Ostfriesian and Lacaune dairy sheep: udder anatomy, milk ejection and milking characteristics." Livestock Production Science 50, no. 1-2 (October 1997): 176. http://dx.doi.org/10.1016/s0301-6226(97)90133-0.

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Drouilhet, Laurence, Catherine Taragnat, Joël Fontaine, Anne Duittoz, Philippe Mulsant, Loys Bodin, and Stéphane Fabre. "Endocrine Characterization of the Reproductive Axis in Highly Prolific Lacaune Sheep Homozygous for the FecLL Mutation1." Biology of Reproduction 82, no. 5 (May 1, 2010): 815–24. http://dx.doi.org/10.1095/biolreprod.109.082065.

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Acurcio, L. B., M. R. Souza, A. C. Nunes, D. L. S. Oliveira, S. H. C. Sandes, and L. B. Alvim. "Isolation, enumeration, molecular identification and probiotic potential evaluation of lactic acid bacteria isolated from sheep milk." Arquivo Brasileiro de Medicina Veterinária e Zootecnia 66, no. 3 (June 2014): 940–48. http://dx.doi.org/10.1590/1678-41625796.

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Lactic acid bacteria species were molecularly identified in milk from Lacaune, Santa Inês and crossbred sheep breeds and their in vitro probiotic potential was evaluated. The species identified were Enterococcus faecium (56.25%), E. durans (31.25%) and E. casseliflavus (12.5%). No other lactic acid bacteria species, such as lactobacilli, was identified. Most of the isolated enterococci were resistant to gastric pH (2.0) and to 0.3% oxgall. All tested enterococci were resistant to ceftazidime, oxacillin and streptomycin and sensible to clindamycin, erythromycin and penicillin. The resistance to ciprofloxacin, gentamicin, tetracycline and vancomycin varied among tested species. All tested enterococci strongly inhibited (P<0.05) Escherichia coli and Listeria monocytogenes, moderately inhibited E. faecalis and Staphylococcus aureus and did not inhibit Pseudomonas aeruginosa, Salmonella enterica var. Typhimurium and also one E. durans sample isolated from sheep milk. Four samples of E. faecium, one of E. durans and one of E. casseliflavus presented the best probiotic potential.

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Dedousi, Anna, Maria A. Karatzia, and Panagiotis D. Katsoulos. "Reference values of Schirmer tear test in sheep and the effect of season on the test results." Acta Veterinaria Hungarica 67, no. 4 (December 2019): 553–60. http://dx.doi.org/10.1556/004.2019.054.

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The aim of this study was to determine the reference range of Schirmer tear test (STT) values in sheep using Greek indigenous and mixed breeds and to investigate the potential effect of breed and season on these values. Ninety (30 Chios, 30 Florina and 30 Lacaune mixed breed) ewes aged 2 years or more were used for the study. The aqueous portion of the tear film was measured using Schirmer tear test (STT) commercial strips bilaterally by the same investigator with the animal in standing position. The average STT value recorded was 18.45 ± 3.93 mm/min and the range 10.8–26.2 mm/min. STT was significantly affected by the season and the recorded values were significantly higher in summer compared to winter. The breed had no significant effect on tear secretion. The results of the present study provide a reference range of STT values in sheep and indicate that tear secretion is significantly affected by the season.

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Molina, E., A. Ferret, G. Caja, S. Calsamiglia, and J. Gasa. "A comparative study of dry matter intake and digestive pool variations in Manchega and Lacaune dairy sheep." Proceedings of the British Society of Animal Science 1999 (1999): 98. http://dx.doi.org/10.1017/s1752756200002532.

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Manchega (MN) and Lacaune (LC) are two semi-coarse-wooled dairy breeds with similar size but different milk yield, the latter producing twice as much milk as the former (Pérez, 1997). The aim of this experiment was to compare, under the same feed conditions, dry matter intake and performance in late pregnancy and lactation and digestive pools of these two breeds.Twenty-four ewes, 12 per breed, were used in three different periods: late pregnancy (8 weeks), rearing (5 weeks) and milking (7 weeks). At lambing, average body weight was 74.4 vs 78.5 kg, for LC and MN, respectively. Dry matter intake (DMI), apparent dry matter digestibility (DMD), body condition score (BCS) and milk yield (MY) standardized according to Bocquier et al. (1993) were recorded.

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Rupp, R., G. Lagriffoul, J. M. Astruc, and F. Barillet. "Genetic Parameters for Milk Somatic Cell Scores and Relationships with Production Traits in French Lacaune Dairy Sheep." Journal of Dairy Science 86, no. 4 (April 2003): 1476–81. http://dx.doi.org/10.3168/jds.s0022-0302(03)73732-1.

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Alba, Davi F., Jorge A. Favaretto, Hiam Marcon, Thalia F. Saldanha, Karoline W. Leal, Gabriela Campigoto, Carine F. Souza, et al. "Vegetable biocholine supplementation in pre- and postpartum Lacaune sheep: Effects on animal health, milk production and quality." Small Ruminant Research 190 (September 2020): 106165. http://dx.doi.org/10.1016/j.smallrumres.2020.106165.

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Giambra, I. J., H. Brandt, and G. Erhardt. "Milk protein variants are highly associated with milk performance traits in East Friesian Dairy and Lacaune sheep." Small Ruminant Research 121, no. 2-3 (October 2014): 382–94. http://dx.doi.org/10.1016/j.smallrumres.2014.09.001.

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Miglio, Arianna, Maria Teresa Antognoni, Carmen Maresca, Claudia Moncada, Fulvio Riondato, Eleonora Scoccia, and Vittorio Mangili. "Serum protein concentration and protein fractions in clinically healthy Lacaune and Sarda sheep using agarose gel electrophoresis." Veterinary Clinical Pathology 44, no. 4 (November 19, 2015): 564–69. http://dx.doi.org/10.1111/vcp.12302.

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Figueira, Lucas Machado, Nadja Gomes Alves, Ribrio Ivan Tavares Pereira Batista, Viviane Lopes Brair, Renato Ribeiro Lima, Maria Emilia Franco Oliveira, Jeferson Ferreira Fonseca, and Joanna Maria Gonçalves Souza‐Fabjan. "Pregnancy rate after fixed‐time transfer of cryopreserved embryos collected by non‐surgical route in Lacaune sheep." Reproduction in Domestic Animals 54, no. 11 (September 9, 2019): 1493–96. http://dx.doi.org/10.1111/rda.13550.

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Journal articles on the topic 'Lacaune sheep'

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