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Registro completo
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Biblioteca (s) : |
INIA Las Brujas. |
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Fecha : |
19/01/2022 |
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Actualizado : |
19/01/2022 |
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Autor : |
GUTHRIE, A.D.; LEARMOUNT, J.; VANLEEUWEN, J.; PEREGRINE, A.S.; KELTON, D.; MENZIES, P.I.; FERNÁNDEZ, S.; MARTIN, R.C.; MEDEROS, A.; TAYLOR, M.A. |
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Afiliación : |
A.D. GUTHRIE, Ontario Veterinary College, University of Guelph, Guelph, Ontario N1G 2W1, Canada.; J. LEARMOUNT, Ontario Veterinary College, University of Guelph, Guelph, Ontario N1G 2W1, Canada.; J. VANLEEUWEN, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, Prince Edward Island C1A 4P3, Canada.; A.S. PEREGRINE, Ontario Veterinary College, University of Guelph, Guelph, Ontario N1G 2W1, Canada.; D. KELTON, Ontario Veterinary College, University of Guelph, Guelph, Ontario N1G 2W1, Canada.; P.I. MENZIES, Ontario Veterinary College, University of Guelph, Guelph, Ontario N1G 2W1, Canada.; S. FERNÁNDEZ, Ontario Veterinary College, University of Guelph, Guelph, Ontario N1G 2W1, Canada; Organic Agriculture Centre of Canada, Nova Scotia Agricultural College, Truro, Nova Scotia B2N 5E3, Canada.; R.C. MARTIN, Organic Agriculture Centre of Canada, Nova Scotia Agricultural College, Truro, Nova Scotia B2N 5E3, Canada.; AMERICA ESTHER MEDEROS SILVEIRA, Ontario Veterinary College, University of Guelph, Guelph, Ontario N1G 2W1, Canada.; M.A. TAYLOR, Food and Environment Research Agency, Sand Hutton, York YO41 1LZ, United Kingdom. |
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Título : |
Evaluation of a British computer model to simulate gastrointestinal nematodes in sheep on Canadian farms. |
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Fecha de publicación : |
2010 |
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Fuente / Imprenta : |
Veterinary Parasitology, 2010, Volume 174, Issue 1-2, Pages 92-1052. doi: https://doi.org/10.1016/j.vetpar.2010.08.002 |
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ISSN : |
0304-4017 |
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DOI : |
10.1016/j.vetpar.2010.08.002 |
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Idioma : |
Inglés |
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Notas : |
Article history: Received 12 January 2010; Revised 21 July 2010; Accepted 2 August 2010; Available online 11 August 2010. |
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Contenido : |
ABSTRACT. - With increasing levels of anthelmintic resistance worldwide and a growing demand to produce more organic products, utilisation of control strategies for gastrointestinal nematodes (GIN) that minimize the use of anthelmintics becomes even more important. This study evaluated the farm-level performance of an existing predictive sheep parasite model from the United Kingdom (UK), using Canadian data. The UK model simulates the epidemiology of three major GIN species of interest (Teladorsagia spp., Haemonchus spp. and Trichostrongylus spp.) and provides a prediction about seasonal parasite levels of lambs and ewes. Model inputs were generated by using data from the first 2 years of a 3-year study (2006-2008) which examined the epidemiology of GIN parasitism in Ontario sheep flocks. Required input data included ewe parasite egg output, pasture-related information and management dynamics. Farm visits in 2006 and 2007 provided relevant data that were collected monthly during the grazing season, on six and seven occasions respectively. These data were collected from 10 ewes and 10 lambs on each farm. For 23 Ontario farms with available data, only 11 farms in 2006 and 14 in 2007 had suitable data to run in the model because the Canadian study was not specifically designed with this simulation model in mind. Observed values for faecal egg counts (FEC) were compared to the model FEC outputs and assessed using linear regression analysis. There was adequate fit between observed and simulated data for 8 of the 11 farms modelled using data generated in 2006 (F=7.55-42.66, df=10-11, R2=0.43-0.81, p=0.021 to <0.001) and with 8 of the farms modelled using data generated in 2007 (F=5.56-35.82, df=9-11, R2=0.36-0.82, p=0.040 to <0.001). We suggest that the poor fit between observed and simulated data for some data sets may be attributable to low-level infection on farms making regression difficult due to insensitivity of the egg count method at low values, or a pattern for immunity in ewes that contradicted the model assumptions. Required model modifications focused on accommodating the differences between UK and Canadian management styles; specifically the practice of bringing lambs indoors for weaning which was sometimes used on Canadian farms. © 2010. MenosABSTRACT. - With increasing levels of anthelmintic resistance worldwide and a growing demand to produce more organic products, utilisation of control strategies for gastrointestinal nematodes (GIN) that minimize the use of anthelmintics becomes even more important. This study evaluated the farm-level performance of an existing predictive sheep parasite model from the United Kingdom (UK), using Canadian data. The UK model simulates the epidemiology of three major GIN species of interest (Teladorsagia spp., Haemonchus spp. and Trichostrongylus spp.) and provides a prediction about seasonal parasite levels of lambs and ewes. Model inputs were generated by using data from the first 2 years of a 3-year study (2006-2008) which examined the epidemiology of GIN parasitism in Ontario sheep flocks. Required input data included ewe parasite egg output, pasture-related information and management dynamics. Farm visits in 2006 and 2007 provided relevant data that were collected monthly during the grazing season, on six and seven occasions respectively. These data were collected from 10 ewes and 10 lambs on each farm. For 23 Ontario farms with available data, only 11 farms in 2006 and 14 in 2007 had suitable data to run in the model because the Canadian study was not specifically designed with this simulation model in mind. Observed values for faecal egg counts (FEC) were compared to the model FEC outputs and assessed using linear regression analysis. There was adequate fit between observe... Presentar Todo |
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Palabras claves : |
Canada; Gastrointestinal parasites; Parasite management; Sheep; Simulation modelling. |
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Thesagro : |
ENFERMEDADES PARASITARIAS; OVINOS. |
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Asunto categoría : |
L01 Ganadería |
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Marc : |
LEADER 03463naa a2200349 a 4500
001 1062646
005 2022-01-19
008 2010 bl uuuu u00u1 u #d
022 $a0304-4017
024 7 $a10.1016/j.vetpar.2010.08.002$2DOI
100 1 $aGUTHRIE, A.D.
245 $aEvaluation of a British computer model to simulate gastrointestinal nematodes in sheep on Canadian farms.$h[electronic resource]
260 $c2010
500 $aArticle history: Received 12 January 2010; Revised 21 July 2010; Accepted 2 August 2010; Available online 11 August 2010.
520 $aABSTRACT. - With increasing levels of anthelmintic resistance worldwide and a growing demand to produce more organic products, utilisation of control strategies for gastrointestinal nematodes (GIN) that minimize the use of anthelmintics becomes even more important. This study evaluated the farm-level performance of an existing predictive sheep parasite model from the United Kingdom (UK), using Canadian data. The UK model simulates the epidemiology of three major GIN species of interest (Teladorsagia spp., Haemonchus spp. and Trichostrongylus spp.) and provides a prediction about seasonal parasite levels of lambs and ewes. Model inputs were generated by using data from the first 2 years of a 3-year study (2006-2008) which examined the epidemiology of GIN parasitism in Ontario sheep flocks. Required input data included ewe parasite egg output, pasture-related information and management dynamics. Farm visits in 2006 and 2007 provided relevant data that were collected monthly during the grazing season, on six and seven occasions respectively. These data were collected from 10 ewes and 10 lambs on each farm. For 23 Ontario farms with available data, only 11 farms in 2006 and 14 in 2007 had suitable data to run in the model because the Canadian study was not specifically designed with this simulation model in mind. Observed values for faecal egg counts (FEC) were compared to the model FEC outputs and assessed using linear regression analysis. There was adequate fit between observed and simulated data for 8 of the 11 farms modelled using data generated in 2006 (F=7.55-42.66, df=10-11, R2=0.43-0.81, p=0.021 to <0.001) and with 8 of the farms modelled using data generated in 2007 (F=5.56-35.82, df=9-11, R2=0.36-0.82, p=0.040 to <0.001). We suggest that the poor fit between observed and simulated data for some data sets may be attributable to low-level infection on farms making regression difficult due to insensitivity of the egg count method at low values, or a pattern for immunity in ewes that contradicted the model assumptions. Required model modifications focused on accommodating the differences between UK and Canadian management styles; specifically the practice of bringing lambs indoors for weaning which was sometimes used on Canadian farms. © 2010.
650 $aENFERMEDADES PARASITARIAS
650 $aOVINOS
653 $aCanada
653 $aGastrointestinal parasites
653 $aParasite management
653 $aSheep
653 $aSimulation modelling
700 1 $aLEARMOUNT, J.
700 1 $aVANLEEUWEN, J.
700 1 $aPEREGRINE, A.S.
700 1 $aKELTON, D.
700 1 $aMENZIES, P.I.
700 1 $aFERNÁNDEZ, S.
700 1 $aMARTIN, R.C.
700 1 $aMEDEROS, A.
700 1 $aTAYLOR, M.A.
773 $tVeterinary Parasitology, 2010, Volume 174, Issue 1-2, Pages 92-1052. doi: https://doi.org/10.1016/j.vetpar.2010.08.002
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Registro original : |
INIA Las Brujas (LB) |
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Registro completo
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Biblioteca (s) : |
INIA La Estanzuela. |
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Fecha actual : |
16/01/2017 |
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Actualizado : |
10/04/2017 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Nacionales |
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Circulación / Nivel : |
B - 2 |
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Autor : |
CLARIGET, J.; PÉREZ-CLARIGET R.; ÁLVAREZ-OXILEY, A.; BENTANCUR, O.; BRUNI ,M. |
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Afiliación : |
JUAN MANUEL CLARIGET BRIZ, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; RAQUEL PÉREZ-CLARIGET, UdelaR (Universidad de la República), FAGRO ( Facultad de Agronomía), Uruguay.; ANDREA ÁLVAREZ-OXILEY, UdelaR (Universidad de la República), FAGRO ( Facultad de Agronomía), Uruguay.; OSCAR BENTANCUR, UdelaR (Universidad de la República), FAGRO ( Facultad de Agronomía), Uruguay.; MARÍA DE LOS ÁNGELES BRUNI, UdelaR (Universidad de la República)/ Facultad de Agronomía-EEMAC. |
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Título : |
Suplementación con glicerina cruda y afrechillo de arroz entero a vacas de carne pastoreando campo natural. (Supplementation of beef cows grazing natural pasture with crude glycerin and whole rice bran). |
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Fecha de publicación : |
2016 |
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Fuente / Imprenta : |
Agrociencia Uruguay, v. 20, n.1, p. 121-131, 2016. |
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ISSN : |
1510-0839 |
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Idioma : |
Español |
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Contenido : |
RESUMEN.
Con el objetivo de evaluar los efectos de la suplementación con glicerina cruda (GC) y afrechillo de arroz entero (AA) sobre la dinámica ruminal, la cinética de degradación de la materia seca (MS), el consumo de forraje y variables plasmáticas asociadas al balance energético en vacas de carne pastoreando campo natural, cuatro vacas fistuladas en el rumen fueron asignadas a un cuadrado latino 4 × 4 con un período adicional. Los tratamientos evaluados fueron: suplementación con GC (550 mL/vaca/día), suplementación con AA (1kg de MS/vaca/día), suplementación con GC + AA (550 mL/vaca/día + 1 kg de MS/vaca/día) y sin suplementación (CON). La asignación diaria de forraje para todos los tratamientos fue 10 % del peso vivo. La GC asociada o no al AA disminuyó el pH ruminal en las primeras seis horas pos-suplementación, pero no afectó ningún parámetro de degradabilidad de la MS del forraje. Comparada con CON la suplementación con GC disminuyó el consumo de forraje pero no afectó el consumo de MS total ni de energía metabolizable (EM). Ni el consumo de forraje, ni el consumo total fueron diferentes entre la suplementación con GC + AA y AA, sin embargo el consumo de EM fue mayor para GC + AA en comparación con el resto. La suplementación con GC + AA aumentó la concentración plasmática de glucosa e insulina sin afectar la de B-hydroxibutirato. De los suplementos ensayados, la mezcla GC + AA (mayor nivel de suplementación) logró los mejores resultados biológicos.
.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-..
SUMMARY.
To study the effects of supplementation with crude glycerin (GC) and whole rice bran (AA) on ruminal dynamics, kinetics of dry matter (DM) degradation, forage intake and plasma variables associated with energy balance in beef cows grazing natural pasture, four rumen fistulated cows were allocated to a latin square 4 × 4 with an additional period. The treatments were: supplementation with GC (550 mL/cow/day), supplementation with AA (1 kg DM/cow/day), supplementation with GC + AA (550 mL/cow/day + 1 kg DM/cow/day) and without supplementation (CON). The daily forage allowance for all treatments was 10 % of live weight. GC associated or not to AA decreased ruminal pH on the first six hours pos-supplementation, but did not affect any parameters of degradability of forage DM. GC supplementation decreased forage intake but did not affect total DM intake and metabolizable energy (ME) compared with CON. GC + AA and AA supplementation did not differ on intake of forage and total DM, however the ME intake was higher for GC + AA compared to the rest. GC + AA supplementation increased plasma concentration of glucose and insulin without affecting B-hydroxibutirate. Among the supplements tested, GC + AA mixture (higher level of supplementation) achieved the best biological results. MenosRESUMEN.
Con el objetivo de evaluar los efectos de la suplementación con glicerina cruda (GC) y afrechillo de arroz entero (AA) sobre la dinámica ruminal, la cinética de degradación de la materia seca (MS), el consumo de forraje y variables plasmáticas asociadas al balance energético en vacas de carne pastoreando campo natural, cuatro vacas fistuladas en el rumen fueron asignadas a un cuadrado latino 4 × 4 con un período adicional. Los tratamientos evaluados fueron: suplementación con GC (550 mL/vaca/día), suplementación con AA (1kg de MS/vaca/día), suplementación con GC + AA (550 mL/vaca/día + 1 kg de MS/vaca/día) y sin suplementación (CON). La asignación diaria de forraje para todos los tratamientos fue 10 % del peso vivo. La GC asociada o no al AA disminuyó el pH ruminal en las primeras seis horas pos-suplementación, pero no afectó ningún parámetro de degradabilidad de la MS del forraje. Comparada con CON la suplementación con GC disminuyó el consumo de forraje pero no afectó el consumo de MS total ni de energía metabolizable (EM). Ni el consumo de forraje, ni el consumo total fueron diferentes entre la suplementación con GC + AA y AA, sin embargo el consumo de EM fue mayor para GC + AA en comparación con el resto. La suplementación con GC + AA aumentó la concentración plasmática de glucosa e insulina sin afectar la de B-hydroxibutirato. De los suplementos ensayados, la mezcla GC + AA (mayor nivel de suplementación) logró los mejores resultados biológicos.
.-.-.-.-.-.-.-... Presentar Todo |
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Palabras claves : |
ENERGY; GLYCEROL; METABOLISM. |
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Thesagro : |
ENERGÍA; GLICEROL; METABOLISMO; RUMEN. |
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Asunto categoría : |
L02 Alimentación animal |
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URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/6422/1/Agrociencia-v.20.p.121-131.2016.Clariget-et-al.pdf
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Marc : |
LEADER 03656naa a2200265 a 4500
001 1056432
005 2017-04-10
008 2016 bl uuuu u00u1 u #d
022 $a1510-0839
100 1 $aCLARIGET, J.
245 $aSuplementación con glicerina cruda y afrechillo de arroz entero a vacas de carne pastoreando campo natural. (Supplementation of beef cows grazing natural pasture with crude glycerin and whole rice bran).
260 $c2016
520 $aRESUMEN. Con el objetivo de evaluar los efectos de la suplementación con glicerina cruda (GC) y afrechillo de arroz entero (AA) sobre la dinámica ruminal, la cinética de degradación de la materia seca (MS), el consumo de forraje y variables plasmáticas asociadas al balance energético en vacas de carne pastoreando campo natural, cuatro vacas fistuladas en el rumen fueron asignadas a un cuadrado latino 4 × 4 con un período adicional. Los tratamientos evaluados fueron: suplementación con GC (550 mL/vaca/día), suplementación con AA (1kg de MS/vaca/día), suplementación con GC + AA (550 mL/vaca/día + 1 kg de MS/vaca/día) y sin suplementación (CON). La asignación diaria de forraje para todos los tratamientos fue 10 % del peso vivo. La GC asociada o no al AA disminuyó el pH ruminal en las primeras seis horas pos-suplementación, pero no afectó ningún parámetro de degradabilidad de la MS del forraje. Comparada con CON la suplementación con GC disminuyó el consumo de forraje pero no afectó el consumo de MS total ni de energía metabolizable (EM). Ni el consumo de forraje, ni el consumo total fueron diferentes entre la suplementación con GC + AA y AA, sin embargo el consumo de EM fue mayor para GC + AA en comparación con el resto. La suplementación con GC + AA aumentó la concentración plasmática de glucosa e insulina sin afectar la de B-hydroxibutirato. De los suplementos ensayados, la mezcla GC + AA (mayor nivel de suplementación) logró los mejores resultados biológicos. .-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.. SUMMARY. To study the effects of supplementation with crude glycerin (GC) and whole rice bran (AA) on ruminal dynamics, kinetics of dry matter (DM) degradation, forage intake and plasma variables associated with energy balance in beef cows grazing natural pasture, four rumen fistulated cows were allocated to a latin square 4 × 4 with an additional period. The treatments were: supplementation with GC (550 mL/cow/day), supplementation with AA (1 kg DM/cow/day), supplementation with GC + AA (550 mL/cow/day + 1 kg DM/cow/day) and without supplementation (CON). The daily forage allowance for all treatments was 10 % of live weight. GC associated or not to AA decreased ruminal pH on the first six hours pos-supplementation, but did not affect any parameters of degradability of forage DM. GC supplementation decreased forage intake but did not affect total DM intake and metabolizable energy (ME) compared with CON. GC + AA and AA supplementation did not differ on intake of forage and total DM, however the ME intake was higher for GC + AA compared to the rest. GC + AA supplementation increased plasma concentration of glucose and insulin without affecting B-hydroxibutirate. Among the supplements tested, GC + AA mixture (higher level of supplementation) achieved the best biological results.
650 $aENERGÍA
650 $aGLICEROL
650 $aMETABOLISMO
650 $aRUMEN
653 $aENERGY
653 $aGLYCEROL
653 $aMETABOLISM
700 1 $aPÉREZ-CLARIGET R.
700 1 $aÁLVAREZ-OXILEY, A.
700 1 $aBENTANCUR, O.
700 1 $aBRUNI ,M.
773 $tAgrociencia Uruguay$gv. 20, n.1, p. 121-131, 2016.
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