Croisements Entre Les Races Ovines Préalpes Du Sud Et Frisonne (Ostfriesisches Milchschaf). Ii. — Reproduction, Viabilité, Croissance, Conformation

Ricordeau, G.; Flamant, J. C.; Petrequin, P.; Mirman, B.; Carpentier, M.

doi:10.1051/animres:19690203

Cited by 11 publications

(5 citation statements)

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“…In addition, differences between the total flock mortality rates and ewe production lifespan in the eastern and western survey regions could be partially due to differences in the prevalence of GIN and foot lameness. Moreover, regarding sheep breed origin of dairy ewes in Argentina, producers should be warned about the short lifespan of East Friesian breed and crosses of over 50%, reported from several countries to be less than three years, with high prevalence of pneumonia (Ricordeau & Flamand 1969, Thomas et al 1999.…”

Section: Discussionmentioning

confidence: 99%

Health management practices and disease prevalence in dairy sheep systems in Argentina

Suárez

Busetti

2009

Pesq. Vet. Bras.

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931Pesq. Vet. Bras. 29(11):931-937, novembro 2009 RESUMO.-[Práticas de manejo sanitário e frequência de doenças em ovinos leiteiros na Argentina.] Foi realizado um levantamento longitudinal em 19 fazendas de ovinos leiteiros na Argentina com o objetivo de conhecer práticas de manejo, medidas sanitárias e ocorrência e freqüência das enfermidades. O levantamento incluiu 40% de todas as fazendas do país que produzem leite ovino. Um questionário foi utilizado com entrevistas pessoais com os ovinocultores durante visita às fazendas. A percentagem de fazendas que relataram vacinação rotineira contra clostridioses, ectima contagioso, pneumonia e administração parenteral de minerais e vitaminas foi 63%, 47,3%, 16,6% e 42,1%, respectivamente. Parte dos produtores (37,5%) realizava tratamento regularmente contra piolhos e 89,5% contra nematódeos gastrintestinais. O número médio de tratamentos anti-helmínticos anuais, por fazenda, era de 2,26+1,78. A cross-sectional survey of 19 dairy sheep farms in Argentina was carried out with the purpose to know farm management, health practices, and occurrence and mortality of diseases. The survey comprised 40% of all sheep milking farms in Argentina. A questionnaire was conducted by way of personal interviews with sheep owners during farm visits. The proportions of farms reporting routine vaccination for clostridial diseases, contagious ecthyma, pneumonia and mineral and vitamin parenteral administration were 63%, 47.3%, 16.6% and 42.1% respectively. Regular treatment against lice was used in 37.5% of the farms, and 89.5% o the farmers treated against gastrointestinal nematodes (GIN). The mean number of GIN drenches per farm was 2.26±1.78 annually. In 68.4% of the milking flocks the California Mastitis Test was regularly done and 55.6% of the farmer managers had sampled their flocks once a year for Brucella ovis antibodies. During the pre-mating period respectively 68.4% and 50% of farmers clinically examined their rams and ewe for general health and teeth condition. The udders of ewes were frequently inspected at the start of each milking period. The most important parasite problems noticed were GIN (reported by 57.9% of farmers), lice (57.9%) and scabies (10.5%) and the most frequent infectious diseases were ecthyma (73.7%), pneumonia and other respiratory problems (57.9%), clinical mastitis (55.6%), clostridial diseases (36.9%) and foot lameness (35.2%). Photosensitivity (47.4%) and ruminal acidosis (42.1%) were reported as other frequent toxic or metabolic disorders. Owners mentioned that the mean lifespan or milk productive time per ewe was 4.5±1.4 years. Perinatal lamb mortality was 8.5% and the total flock mortality rates, above the first 24 h of life was 6.9%. The high rates of lamb mortality during the pre-weaning (10.3%) and post-weaning (5.9%) periods indicate that this problem, as well as the most prevalent diseases, should be the subject of further studies. e 50% dos produtores examinavam clinicamente seus carneiros e a condição geral e de dentes de suas ovelhas. O úb...

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Section: Discussionmentioning

confidence: 99%

Health management practices and disease prevalence in dairy sheep systems in Argentina

Suárez

Busetti

2009

Pesq. Vet. Bras.

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“…There are reports in the literature of poor survival of lambs of high percentage EF breeding in France [ 8 ] and Greece [ 9 ] compared to other breeds with the primary cause of the increased mortality due to respiratory disease. We observed a similar effect in the early years of our work with EF.…”

Section: Brief History Of the Spooner Agricultural Research Stationmentioning

confidence: 99%

Dairy sheep production research at the University of Wisconsin-Madison, USA – a review

Thomas

Berger²,

McKusick

et al. 2014

J Animal Sci Biotechnol

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Commercial milking of sheep is a new agricultural industry in the United States starting approximately 30 yr ago. The industry is still small, but it is growing. The majority of the sheep milk is used in the production of specialty cheeses. The United States is the major importer of sheep milk cheeses with 50 to 60% of annual world exports coming to the United States during the past 20 yr. Therefore, there is considerable growth potential for the industry in the United States. The only dairy sheep research flock in North America is located at the Spooner Agricultural Research Station of the University of Wisconsin-Madison. The research program started in 1993 and has been multifaceted; dealing with several areas important to commercial dairy sheep farmers. The East Friesian and Lacaune dairy breeds were compared and introduced to the industry through the research program. Both dairy breeds produced significantly more milk than traditional meat-wool breeds found in the U.S., but the two breeds differed in their production traits. East Friesian-cross ewes produced more lambs and slightly more milk than Lacaune-cross ewes whereas Lacaune-cross ewes produced milk with a higher percentage of fat and protein than East Friesian-cross ewes. Lactation physiology studies have shown that ewes with active corpora lutea have increased milk yields, oxytocin release during milking is required to obtain normal fat percentages in the milk, large udder cisterns of dairy ewes can allow for increased milking intervals, and short daylengths during late pregnancy results in increased milk yield. In the nutrition area, legume-grass pastures and forages with a higher percentage of legume will result in increased milk production. Grazing ewes respond to additional supplementation with increased milk yield, but it is important to match the supplement to the quality of the grazing. Ewes on high quality legume-grass pastures that are high in rumen degradable protein respond with increased milk production to supplements high in energy and/or high in rumen undegraded protein.

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“…Farmers rely only on the simplest scheme, which involves upgrading local populations to dairy-type breeds. Several comparisons between local and exotic breeds were done to determine whether local dairy breeds could be used successfully under the improved conditions or whether it would have been better to replace them with more productive genotypes (Ricordeau and Flamant, 1969;Zervas et al, 1975). The East Friesian, Awassi, and Chios breeds were once the most imported breeds (Barillet, 1997).…”

Section: Breeding Strategiesmentioning

confidence: 99%

Invited review: Current state of genetic improvement in dairy sheep

Carta

Casu

Salaris

2009

Journal of Dairy Science

111

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Dairy sheep have been farmed traditionally in the Mediterranean basin in southern Europe, central Europe, eastern Europe, and in Near East countries. Currently, dairy sheep farming systems vary from extensive to intensive according to the economic relevance of the production chain and the specific environment and breed. Modern breeding programs were conceived in the 1960s. The most efficient selection scheme for local dairy sheep breeds is based on pyramidal management of the population with the breeders of nucleus flocks at the top, where pedigree and official milk recording, artificial insemination, controlled natural mating, and breeding value estimation are carried out to generate genetic progress. The genetic progress is then transferred to the commercial flocks through artificial insemination or natural-mating rams. Increasing milk yield is still the most profitable breeding objective for several breeds. Almost all milk is used for cheese production and, consequently, milk content traits are very important. Moreover, other traits are gaining interest for selection: machine milking ability and udder morphology, resistance to diseases (mastitis, internal parasites, scrapie), and traits related to the nutritional value of milk (fatty acid composition). Current breeding programs based on the traditional quantitative approach have achieved appreciable genetic gains for milk yield. In many cases, further selection goals such as milk composition, udder morphology, somatic cell count, and scrapie resistance have been implemented. However, the possibility of including other traits of selective interest is limited by high recording costs. Also, the organizational effort needed to apply the traditional quantitative approach limits the diffusion of current selection programs outside the European Mediterranean area. In this context, the application of selection schemes assisted by molecular information, to improve either traditional dairy traits or traits costly to record, seems to be attractive in dairy sheep. At the moment, the most effective strategy seems to be the strengthening of research projects aimed at finding causal mutations along the genes affecting traits of economic importance. However, genome-wide selection seems to be unfeasible in most dairy sheep breeds.

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Croisements Entre Les Races Ovines Préalpes Du Sud Et Frisonne (Ostfriesisches Milchschaf). Ii. — Reproduction, Viabilité, Croissance, Conformation

Cited by 11 publications

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Health management practices and disease prevalence in dairy sheep systems in Argentina

Health management practices and disease prevalence in dairy sheep systems in Argentina

Dairy sheep production research at the University of Wisconsin-Madison, USA – a review

Invited review: Current state of genetic improvement in dairy sheep

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