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| Registros recuperados: 717 | |
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| Gillandt, Kathia; Kemper, Nicole. |
| Über einen Zeitraum von 18 Monaten wurden Gesundheitsdaten von fünf Angusrind- Mutterkuh-Herden an vier Standorten in Deutschland erhoben. Ein Projektschwerpunkt lag in der parasitologischen Untersuchung der Herden, wobei in weniger als der Hälfte (41%) der untersuchten Proben Parasitenstadien nachgewiesen wurden. Magen-Darm Strongyliden und Kokzidien stellten dabei regionsübergreifend wesentliche Befunde dar, wohingegen Leberegel, Lungen- und Bandwürmer je nach Standort variierten. Andere Arten wurden vereinzelt nachgewiesen. Die in diesem Zusammenhang ausgewerteten Betriebsfragebögen wiesen auf eine geringe Sensibilisierung der Landwirte für die Parasiten-Problematik hin. So werden zum Beispiel Präparate zur Behandlung nicht auf allen Betrieben... |
| Tipo: Report |
Palavras-chave: Beef cattle; Breeding and genetics; Health and welfare. |
| Ano: 2017 |
URL: http://orgprints.org/32364/1/32364_12NA042_TiHo_Hannover_Kemper_2017_MuKuGreen.pdf |
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| Das hier beschriebene Verbundvorhaben umfasst folgende Teilprojekte: FKZ 12NA042, FKZ 12NA127. Alle in Organic Eprints archivierten Projektbeschreibungen und Veröffentlichungen zu diesem Verbundvorhaben finden Sie unter folgendem Link: http://orgprints.org/id/saved_search/1546. Untersuchung der Tiergesundheit von Mutterkühen und sie beeinflussende Risikofaktoren Ziel der Studie ist die Entwicklung von Empfehlungen zur optimierten Grünlandnutzung hinsichtlich einer bestmöglichen Tiergesundheit und somit die Optimierung der Dauergrünlandwirtschaft unter ökonomischen und ökologischen Gesichtspunkten. Über einen Zeitraum von 18 Monaten werden Einzeltiergesundheits- und Leistungsdaten bei vier Angusrind- Herden an repräsentativen Grünlandstandorten... |
| Tipo: Project description |
Palavras-chave: Beef cattle; Breeding and genetics; Health and welfare. |
| Ano: 2023 |
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| Waßmuth, Ralf; Hohnholz, Tatiana. |
| Das Ziel bestand in der Analyse relevanter tierzüchterischer Parameter sowie der Entwicklung funktioneller Merkmale zum Einsatz in der Zucht von extensiv auf Grünland gehaltenen Mutterkuhherden. Die Untersuchungen wurden auf fünf verschiedenen Betrieben in vier unterschiedlichen Regionen Deutschlands über einen Zeitraum von 18 Monaten durchgeführt. Die untersuchten Tiere waren Deutsch und Aberdeen Angus Mutterkühe und ihre Kälber. Ein Schwerpunkt der Untersuchung war die Analyse möglicher Risikofaktoren auf die Reproduktionsleistung der Mutterkühe anhand der Schwer- und Totgeburtenrate. Die Prävalenzen für Schwer- und Totgeburten betrugen 3,6% und 4,7%. Das Schwergeburtenrisiko war bei Färsen höher als bei Kühen und stieg mit zunehmendem Geburtsgewicht... |
| Tipo: Report |
Palavras-chave: Beef cattle; Breeding and genetics. |
| Ano: 2018 |
URL: http://orgprints.org/33315/1/33315-12NA127-fh_osnabrueck-wassmuth-2018-MuKuGreen-tierzucht.pdf |
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| Nobre,P.R.C.; Lopes,P.S.; Torres,R.A.; Silva,L.O.C.; Regazzi,A.J.; Torres Júnior,R.A.A.; Misztal,I.. |
| Growth curves of Nellore cattle were analyzed using body weights measured at ages ranging from 1 day (birth weight) to 733 days. Traits considered were birth weight, 10 to 110 days weight, 102 to 202 days weight, 193 to 293 days weight, 283 to 383 days weight, 376 to 476 days weight, 551 to 651 days weight, and 633 to 733 days weight. Two data samples were created: one with 79,849 records from herds that had missing traits and another with 74,601 from herds with no missing traits. Records preadjusted to a fixed age were analyzed by a multiple trait model (MTM), which included the effects of contemporary group, age of dam class, additive direct, additive maternal, and maternal permanent environment. Analyses were carried out by a Bayesian method for all... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beef cattle; Multiple trait; Random regression. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352003000400015 |
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| Euclides,Valéria Pacheco Batista; Montagner,Denise Baptaglin; Barbosa,Rodrigo Amorim; Valle,Cacilda Borges do; Nantes,Nayana Nazareth. |
| ABSTRACT The objective of the present study was to evaluate live weight gain per animal and per area and its relationship with the characteristics of pastures of Brachiaria brizantha cv. Paiaguás and Piatã. A randomized blocks experimental design was used, with two treatments and six replicates. The experimental area was 8.0 ha, divided into twelve paddocks of 0.67 ha. The grazing method used was continuous stocking, with variable stocking rate. Three tester steers were used per paddock. Sward heights were measured once a week, and the stocking rate (SR) was adjusted using regulator steers to maintain the sward height at 30 cm. Pasture samples were collected once a month, and herbage accumulation rate (HAR), percentage of leaves (PL), leaf:stem ratio... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beef cattle; Canopy structure; Herbage accumulation; Nutritive value; Stocking rate. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016000300085 |
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| Peña-Espinoza, Miguel. |
| Parasitism with gastrointestinal (GI) nematodes is ubiquitous in grazing cattle and its control is critical to sustain satisfactory levels of animal health, welfare and productivity. Currently, conventional parasite control strategies relying exclusively on anthelmintic drugs are severely threatened by the development of anthelmintic resistance (AR) in bovine nematodes in several countries. In Denmark, cattle farmers and their veterinarians depend largely on macrocyclic lactones (ML), mainly ivermectin (IVM), for nematode control. However, no studies have evaluated the field efficacy of IVM against GI nematodes in Danish cattle. Alternative control approaches to minimize selection for AR and that can complement the use of the still effective anthelmintics... |
| Tipo: Thesis |
Palavras-chave: Production systems; Dairy cattle; Beef cattle; Feeding and growth; Health and welfare. |
| Ano: 2016 |
URL: http://orgprints.org/30837/1/M%20Pe%C3%B1a-Espinoza_PhD%20thesis%20%28secured%29.pdf |
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| Peña-Espinoza, Miguel; Valente, Angela H.; Thamsborg, Stig M.; Simonsen, Henrik T.; Boas, Ulrik; Enemark, Heidi L.; López-Muñoz, Rodrigo; Williams, Andrew R.. |
| Increasing drug resistance in gastrointestinal (GI) parasites of livestock and concerns about chemical residues in animal products and the environment are driving the development of alternative control strategies that are less reliant on the use of synthetic drugs. An increasingly investigated approach is the use of bioactive forages with antiparasitic properties as part of the animal’s diet (nutraceuticals) or as potential sources of novel, natural parasiticides. Chicory (Cichorium intybus) is a multi-purpose crop and one of the most promising bioactive forages in temperate regions, and numerous in vivo trials have explored its potential against parasitic nematodes in livestock. However, it is unclear whether chicory can induce a direct and broad activity... |
| Tipo: Journal paper |
Palavras-chave: Production systems; Dairy cattle; Beef cattle; Sheep and goats; Health and welfare; Pigs. |
| Ano: 2018 |
URL: http://orgprints.org/33736/1/Pe%C3%B1a-Espinoza%20et%20al%202018.pdf |
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| Silva,Ana Mary da; Alencar,Maurício Mello de; Regitano,Luciana Correia de Almeida; Oliveira,Márcia Cristina de Sena; Barioni Júnior,Waldomiro. |
| Resistance of beef cattle heifers to the cattle tick Boophilus microplus was evaluated by artificial infestation of 66 beef cattle heifers of the following genetic groups: 16 Nelore (NE), 18 Canchim x Nelore (CN), 16 Angus x Nelore (AN) and 16 Simmental x Nelore (SN). The animals, with a mean age of 16.5 months, were maintained with no chemical tick control in a Brachiaria decumbens pasture. Four artificial infestations with 20,000 B. microplus larvae were carried out 14 days apart and from day 18 to day 22 of each infestation the number of engorged female ticks (> 4.5 mm) was counted on the left side of each heifer. Data were analyzed as the percentage of return (PR = percentage of ticks counted relative to the number infested), transformed to (PR)¼,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beef cattle; Crossbred; Tick resistance. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000600020 |
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| THIAGO, L. R. L. de S.; SILVA, J. M. da. |
| Para ser competitiva, a bovinocultura de conta tropical precisa explorar melhor o pasto, corrigindo suas possíveis deficiências nutricionais com um suplemento, o que deve ser feito com muito critério e dentro de uma meta de produção bem estabelecida. Isto porque nos trópicos, ao contrário dos países de clima temperado, é possível manter os bovinos em pastejo durante todo o ano , maximizando o conceito de "boi fotossintético". Os elementos que compõem esse sistema são a energia solar (luz e calor), a planta forrageira, componente sinstetizados das substâncias orgânicas (via fotossíntese), os bovinos, componente transformador da matéria vegetal em carne (via fermentação ruminal), o solo, componente sustentador e fornecedor de elementos nutritivos, a umidade,... |
| Tipo: Comunicado Técnico (INFOTECA-E) |
Palavras-chave: Bovino de corte; Suplementação em pasto; Supplements; Mineral nutrients.; Pastejo; Nutrição Animal; Suplemento Mineral.; Animal nutrition; Beef cattle; Grazing.. |
| Ano: 2004 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/326137 |
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| Schoenau,W.; Porciuncula,P.M.; Zamberlan,G.; Mesquita,F.S.; Vieira,V.; Oliveira,J.F.C.; Gonçalves,P.B.D.. |
| The association between single-strand conformation polymorphism (SSCP) in the gene of insulin-like growth factor-I receptor (IGF-IR) and age at first calving (AFC), calving interval (CI), lactation length (LL), and milk yield (MY) was studied using 106 graded Holstein females. The polimerase chain reaction (PCR) with specific initiating oligonucleotides, resulted an amplified fragment of 335pb. The population genotypes frequencies were 82.1% and 17.9%, for AA and AB genotypes, respectively. The frequency of A allele was 0.91 and 0.09 of B allele. No association between the identified polymorphism and AFC, CI, and MY was observed. The LL was positively associated (P<0.05) with the absence of B allele. Animals carrying the AA genotype presented a longer... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beef cattle; Reproductive efficiency; Post-calving; Candidate gene. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352005000600011 |
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| Almeida,Sabrina Esteves Matos; Almeida,Erik Amazonas de; Terra,Gustavo; Neves,Jairo Pereira; Gonçalves,Paulo Bayard Dias; Weimer,Tania de Azevedo. |
| Three short tandem repeats (STRs), BMS1074, BM1500, IDVGA-51, and three single nucleotide polymorphisms (SNPs), LEPSau3AI (A/B), LEPSau3AI (+/-) and LEPKpn2I linked to the LEP gene were investigated to verify associations with productive performance in postpartum cows of two beef cattle breeds, Aberdeen Angus (AA, n=98) and Charolais (C, n=83). After polymerase chain reaction, STRs were analyzed by vertical electrophoresis and SNPs in agarose gel after endonucleases cleavage. In AA herd 79% of BMS1074*151 carriers had a lower average daily weight gain (ADG) when compared with the population mean daily weight gain (103g), while 62% of BMS1074*151 non-carriers presented a higher ADG (P<0.01); AA animals with at least one BMS1074*151 allele showed a ADG... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Leptin; STRs; SNPs; Beef cattle; Weight gain; Post-partum. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782007000100033 |
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| Souza,Fabio Ricardo Pablos de; Vozzi,Pedro Alejandro; Vila,Reginaldo Aparecido; Boligon,Arione Augusti; Galerani,Marli Aparecida Vani; Lobo,Raysildo Barbosa; Martelli,Lucia Regina. |
| MUC1 is a heavily glycosylated mammalian transmembrane protein expressed by mucosal secretory tissues for both protection against microbial infection and lubrication. An important characteristic of MUC1 is its variable number of tandem repeats (VNTR) containing several sites for O-glycosylation. VNTR length has been associated with many human diseases and with certain economically important traits in domestic ruminants. The aim of the present study was to correlate the length of MUC1 gene VNTR with expected progeny differences (EPDs) obtained for growth, fertility and carcass traits. Five alleles were identified, with alleles containing short VNTRs being more frequent than those with long, thereby demonstrating that Brazilian Nelore cattle are... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beef cattle; Molecular marker; Productive traits; Quantitative trait locus. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000100013 |
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| Corva,Pablo; Soria,Liliana; Schor,Alejandro; Villarreal,Edgardo; Cenci,Macarena Pérez; Motter,Mariana; Mezzadra,Carlos; Melucci,Lilia; Miquel,Cristina; Paván,Enrique; Depetris,Gustavo; Santini,Francisco; Naón,Juan Grigera. |
| The activity of the calpains/calpastatin proteolytic system is closely related to the postmortem tenderization of meat. We investigated the association between beef tenderness and single nucleotide polymorphism (SNP) markers on the CAPN1 gene (SNP316, alleles C/G; SNP530 alleles A/G) and the CAST gene 3' untranslated region (SNP2870, alleles A/G). We sampled nine slaughter groups comprising 313 steers which had been reared in beef production systems in Argentina between 2002 and 2004 from crosses between Angus, Hereford and Limousin cattle. Minor allele frequencies for the markers were 0.27 to 0.46 (C), 0.02 to 0.18 (A), and 0.24 to 0.53 (A), respectively. The presence of CAPN1 markers had significant effects on meat shear force but no detectable effects... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beef cattle; CAPN1; CAST; Genetic markers; Meat quality. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000600006 |
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| Registros recuperados: 717 | |
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