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Biblioteca (s) : |
INIA Treinta y Tres. |
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Fecha : |
18/04/2022 |
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Actualizado : |
18/04/2022 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Autor : |
LEZAMA, F.; PARUELO, J. |
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Afiliación : |
FELIPE LEZAMA, Department of Environmental Systems, Faculty of Agronomy, University of República, Montevideo, Uruguay.; JOSÉ PARUELO, Institute of Ecology and Environmental Sciences, Faculty of Sciences, UDELAR, UY. Department of Quantitative Methods and Information Systems, FAGRO, UY. INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
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Título : |
Regional assessment of stocking rate effects on uruguayan rangelands: a ranch-level study. |
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Fecha de publicación : |
2022 |
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Fuente / Imprenta : |
Rangeland Ecology & Management, 2022, volume 82, pages 58-65. Doi: https://doi.org/10.1016/j.rama.2022.02.005 |
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DOI : |
10.1016/j.rama.2022.02.005 |
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Idioma : |
Inglés |
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Notas : |
Article history: Received 27 April 2021 // Revised 9 February 2022 // Accepted 16 February 2022. |
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Contenido : |
We analyzed the variation of plant composition, forage production, and livestock diet across a broad stocking rate gradient on Eastern Hills rangelands of Uruguay. Our approach encompassed five ranches subjected to mixed sheep-cattle grazing and combined field surveys, microhistological fecal analysis, and remote sensing techniques. We hypothesized that selectivity would decrease as stocking rate increased. Vegetation data and fecal samples were obtained in 17 paddocks in 2008. To investigate the role of stocking rate on vegetation, we focused on dominant species and forage type cover. Diet composition was analyzed at forage type level. Annual net primary productivity was estimated for each paddock using the normalized difference vegetation index derived from the MODIS (Moderate Resolution Imaging Spectroradiometer) sensor. We found a clear relationship between the variation in stocking rate and floristic and forage type composition, both suggesting a deterioration of grassland conservation status. Cool season grass cover varied from 25% to 5%, from low to high stocking rates. Dicot cover showed an opposite trend, with values around 15% in the low and moderate stocking levels and reaching 35% on high-stocked paddocks. Diet composition and diet overlap between herbivores also showed clear patterns of response to stocking rate. On the other hand, livestock selectivity interacted with herbivore type. While cattle showed the expected pattern, sheep did not decrease selectivity in winter as stocking rate increased. Contrary to expectations, annual net primary productivity was similar across the different stocking rate levels and the month of maximum productivity was generally March. Our study provides strong evidence of marked rangeland degradation; however, the lack of response in terms of ANPP and the ability of sheep to maintain selectivity under high stocking rates could help to explain the lack of responsiveness in the adoption of generalized stocking adjustments by the ranchers. MenosWe analyzed the variation of plant composition, forage production, and livestock diet across a broad stocking rate gradient on Eastern Hills rangelands of Uruguay. Our approach encompassed five ranches subjected to mixed sheep-cattle grazing and combined field surveys, microhistological fecal analysis, and remote sensing techniques. We hypothesized that selectivity would decrease as stocking rate increased. Vegetation data and fecal samples were obtained in 17 paddocks in 2008. To investigate the role of stocking rate on vegetation, we focused on dominant species and forage type cover. Diet composition was analyzed at forage type level. Annual net primary productivity was estimated for each paddock using the normalized difference vegetation index derived from the MODIS (Moderate Resolution Imaging Spectroradiometer) sensor. We found a clear relationship between the variation in stocking rate and floristic and forage type composition, both suggesting a deterioration of grassland conservation status. Cool season grass cover varied from 25% to 5%, from low to high stocking rates. Dicot cover showed an opposite trend, with values around 15% in the low and moderate stocking levels and reaching 35% on high-stocked paddocks. Diet composition and diet overlap between herbivores also showed clear patterns of response to stocking rate. On the other hand, livestock selectivity interacted with herbivore type. While cattle showed the expected pattern, sheep did not decrease selectivity i... Presentar Todo |
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Palabras claves : |
(NDVI); EASTERN HILLS; FORAGE TYPES; LIVESTOCK DIET; MICROHISTOLOGICAL TECHNIQUE; NORMALIZED DIFFERENCE VEGETATION INDEX; PLANT COMPOSITION. |
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Asunto categoría : |
F40 Ecología vegetal |
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Marc : |
LEADER 02892naa a2200241 a 4500
001 1063033
005 2022-04-18
008 2022 bl uuuu u00u1 u #d
024 7 $a10.1016/j.rama.2022.02.005$2DOI
100 1 $aLEZAMA, F.
245 $aRegional assessment of stocking rate effects on uruguayan rangelands$ba ranch-level study.$h[electronic resource]
260 $c2022
500 $aArticle history: Received 27 April 2021 // Revised 9 February 2022 // Accepted 16 February 2022.
520 $aWe analyzed the variation of plant composition, forage production, and livestock diet across a broad stocking rate gradient on Eastern Hills rangelands of Uruguay. Our approach encompassed five ranches subjected to mixed sheep-cattle grazing and combined field surveys, microhistological fecal analysis, and remote sensing techniques. We hypothesized that selectivity would decrease as stocking rate increased. Vegetation data and fecal samples were obtained in 17 paddocks in 2008. To investigate the role of stocking rate on vegetation, we focused on dominant species and forage type cover. Diet composition was analyzed at forage type level. Annual net primary productivity was estimated for each paddock using the normalized difference vegetation index derived from the MODIS (Moderate Resolution Imaging Spectroradiometer) sensor. We found a clear relationship between the variation in stocking rate and floristic and forage type composition, both suggesting a deterioration of grassland conservation status. Cool season grass cover varied from 25% to 5%, from low to high stocking rates. Dicot cover showed an opposite trend, with values around 15% in the low and moderate stocking levels and reaching 35% on high-stocked paddocks. Diet composition and diet overlap between herbivores also showed clear patterns of response to stocking rate. On the other hand, livestock selectivity interacted with herbivore type. While cattle showed the expected pattern, sheep did not decrease selectivity in winter as stocking rate increased. Contrary to expectations, annual net primary productivity was similar across the different stocking rate levels and the month of maximum productivity was generally March. Our study provides strong evidence of marked rangeland degradation; however, the lack of response in terms of ANPP and the ability of sheep to maintain selectivity under high stocking rates could help to explain the lack of responsiveness in the adoption of generalized stocking adjustments by the ranchers.
653 $a(NDVI)
653 $aEASTERN HILLS
653 $aFORAGE TYPES
653 $aLIVESTOCK DIET
653 $aMICROHISTOLOGICAL TECHNIQUE
653 $aNORMALIZED DIFFERENCE VEGETATION INDEX
653 $aPLANT COMPOSITION
700 1 $aPARUELO, J.
773 $tRangeland Ecology & Management, 2022, volume 82, pages 58-65. Doi: https://doi.org/10.1016/j.rama.2022.02.005
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INIA Treinta y Tres (TT) |
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Registro completo
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Biblioteca (s) : |
INIA La Estanzuela. |
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Fecha actual : |
15/04/2021 |
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Actualizado : |
02/09/2022 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Circulación / Nivel : |
Internacional - -- |
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Autor : |
MACHADO, M.; SCHILD, C.; PRELIASCO, M.; BALSERINI, A.; MEDEIROS, R.M.T.; BARROS, S.S.; RIET-CORREA, F. |
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Afiliación : |
MIZAEL MACHADO DA COSTA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; CARLOS SCHILD, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; MARCELA PRELIASCO, Departamento de Patobiología, División de Laboratorios Veterinarios, Ministerio de Ganadería, Agricultura y Pesca, Constituyente 1476, 11200 Montevideo, Departamento de Montevideo, Uruguay.; ALDANA BALSERINI, División Sanidad Animal, Zonal Paso de los Toros, Ministerio de Ganadería, Agricultura y Pesca, Tacuarembó, 25 de Mayo 175, 45000 Tacuarembó, Departamento de Tacuarembó, Uruguay.; ROSANE M.T. MEDEIROS, Hospital Veterinário, Centro de Saúde e Tecnologia Rural (CSTR), Campos de Patos, Universidade Federal de Campina Grande, Patos, PB 58700-000, Brazil.; SEVERO S. BARROS, Departamento de Patologia Veterinária, Universidade Federal de Santa Maria (UFSM), Santa Maria, RS 97119-900, Brazil.; FRANKLIN RIET-CORREA AMARAL, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay./Graduate Program in Animal Science in the Tropics, Escola de Medicina Veterinária e Zootecnia, Universidade Federal da Bahia (UFBA), Brasil. |
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Título : |
Enzootic calcinosis in sheep in Uruguay: a brief review and report of two outbreaks. [Calcinose enzoótica em ovinos no Uruguai: revisão de literatura e descrição de dois surtos.]. |
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Fecha de publicación : |
2020 |
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Fuente / Imprenta : |
Pesquisa Veterinaria Brasileira, November 2020, Volume 40, Issue 11, Pages 831-836. OPEN ACCESS. Doi: http://dx.doi.org/10.1590/1678-5150-pvb-6766 |
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DOI : |
10.1590/1678-5150-pvb-6766 |
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Idioma : |
Inglés |
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Notas : |
Article history: Received on August 8, 2020./Accepted for publication on August 24, 2020. Part of the Doctoral Thesis of the first author. |
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Contenido : |
ABSTRACT: This study aimed to do a brief review of enzootic calcinosis in sheep and to report two outbreaks of Nierembergia rivularis poisoning in sheep in Uruguay. The outbreaks occurred in farms located on an island (Outbreak A) and on the border (Outbreak B) of the Rincón del
Bonete lake. Sheep of all ages were affected, with the exception of suckling lambs. The first clinical signs occurred in early October, and deaths occurred from December to February. Outbreaks A and B had morbidity of 10%, and the mortality was 7.2% and 2.8% in Outbreaks
A and B, respectively. The clinical signs included weight loss, retracted abdomen, stiff gait, and kyphosis. An autopsy was performed on one sheep from each outbreak. Pulmonary and arterial calcification, nephrocalcinosis, and osteopetrosis were observed in gross and microscopic examination in both sheep. Thyroid C-cell hyperplasia and carcinoma was observed in sheep A. Sheep B showed thyroid C-cell hyperplasia and parathyroid chief cell atrophy. The parathyroid was not examined in the sheep from Outbreak A. The differential diagnosis of enzootic calcinosis in southern South America should consider four toxic plants in the Solanaceae family: Solanum glaucophyllum, Solanum stuckertii, Nierembergia veitchii, and Nierembergia rivularis.
RESUMO: Este trabalho faz uma breve revisão da calcinose enzoótica em ovinos e descreve dois surtos de intoxicação por Nierembergia rivularis em ovinos no Uruguai. Os surtos ocorreram em propriedades localizadas em uma ilha (Surto A), e nas margens (Surto B) do lago do Rincón del Bonete. Foram afetados ovinos de todas as idades, exceto cordeiros lactentes. Os primeiros sinais clínicos ocorreram no início de outubro e as mortes de dezembro a fevereiro. Morbidade de 10% foi observada nos Surtos A e B. A mortalidade foi de 7,2% e 2,8% nos Surtos A e B, respectivamente. Os sinais clínicos incluíram perda de peso, abdômen retraído, marcha rígida e cifose. Foram necropsiados um animal de cada rebanho. Observou-se mineralização arterial e pulmonar, nefrocalcinose e osteopetrose no exame macroscópico e histológico dos dois ovinos. Hiperplasia e carcinoma de células C da tireoide foram observados no ovino A. O ovino B apresentou hiperplasia de células C da tireoide e atrofia das células principais da paratireoide. As paratireoides do ovino A não foram examinadas. O diagnóstico diferencial da calcinose enzoótica no Sul da América do Sul deve considerar quatro plantas calcinogênicas da família Solanaceae: Solanum glaucophyllum, Solanum stuckertii, Nierembergia veitchii e Nierembergia rivularis. MenosABSTRACT: This study aimed to do a brief review of enzootic calcinosis in sheep and to report two outbreaks of Nierembergia rivularis poisoning in sheep in Uruguay. The outbreaks occurred in farms located on an island (Outbreak A) and on the border (Outbreak B) of the Rincón del
Bonete lake. Sheep of all ages were affected, with the exception of suckling lambs. The first clinical signs occurred in early October, and deaths occurred from December to February. Outbreaks A and B had morbidity of 10%, and the mortality was 7.2% and 2.8% in Outbreaks
A and B, respectively. The clinical signs included weight loss, retracted abdomen, stiff gait, and kyphosis. An autopsy was performed on one sheep from each outbreak. Pulmonary and arterial calcification, nephrocalcinosis, and osteopetrosis were observed in gross and microscopic examination in both sheep. Thyroid C-cell hyperplasia and carcinoma was observed in sheep A. Sheep B showed thyroid C-cell hyperplasia and parathyroid chief cell atrophy. The parathyroid was not examined in the sheep from Outbreak A. The differential diagnosis of enzootic calcinosis in southern South America should consider four toxic plants in the Solanaceae family: Solanum glaucophyllum, Solanum stuckertii, Nierembergia veitchii, and Nierembergia rivularis.
RESUMO: Este trabalho faz uma breve revisão da calcinose enzoótica em ovinos e descreve dois surtos de intoxicação por Nierembergia rivularis em ovinos no Uruguai. Os surtos ocorreram em propriedades... Presentar Todo |
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Palabras claves : |
ENZOOTIC CALCINOSIS; NIEREMBERGIA; PLATAFORMA DE INVESTIGACIÓN EN SALUD ANIMAL; PLATAFORMA DE SALUD ANIMAL; SHEEP DISEASES. |
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Thesagro : |
OVINOS; URUGUAY. |
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Asunto categoría : |
E16 Enfermedades de los animales |
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URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/16676/1/Pesq.-Vet.-Bras.-4011p.831-836-November-2020.pdf
https://www.scielo.br/pdf/pvb/v40n11/1678-5150-pvb-40-11-831.pdf
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Marc : |
LEADER 03836naa a2200301 a 4500
001 1061983
005 2022-09-02
008 2020 bl uuuu u00u1 u #d
024 7 $a10.1590/1678-5150-pvb-6766$2DOI
100 1 $aMACHADO, M.
245 $aEnzootic calcinosis in sheep in Uruguay$ba brief review and report of two outbreaks. [Calcinose enzoótica em ovinos no Uruguai: revisão de literatura e descrição de dois surtos.].$h[electronic resource]
260 $c2020
500 $aArticle history: Received on August 8, 2020./Accepted for publication on August 24, 2020. Part of the Doctoral Thesis of the first author.
520 $aABSTRACT: This study aimed to do a brief review of enzootic calcinosis in sheep and to report two outbreaks of Nierembergia rivularis poisoning in sheep in Uruguay. The outbreaks occurred in farms located on an island (Outbreak A) and on the border (Outbreak B) of the Rincón del Bonete lake. Sheep of all ages were affected, with the exception of suckling lambs. The first clinical signs occurred in early October, and deaths occurred from December to February. Outbreaks A and B had morbidity of 10%, and the mortality was 7.2% and 2.8% in Outbreaks A and B, respectively. The clinical signs included weight loss, retracted abdomen, stiff gait, and kyphosis. An autopsy was performed on one sheep from each outbreak. Pulmonary and arterial calcification, nephrocalcinosis, and osteopetrosis were observed in gross and microscopic examination in both sheep. Thyroid C-cell hyperplasia and carcinoma was observed in sheep A. Sheep B showed thyroid C-cell hyperplasia and parathyroid chief cell atrophy. The parathyroid was not examined in the sheep from Outbreak A. The differential diagnosis of enzootic calcinosis in southern South America should consider four toxic plants in the Solanaceae family: Solanum glaucophyllum, Solanum stuckertii, Nierembergia veitchii, and Nierembergia rivularis. RESUMO: Este trabalho faz uma breve revisão da calcinose enzoótica em ovinos e descreve dois surtos de intoxicação por Nierembergia rivularis em ovinos no Uruguai. Os surtos ocorreram em propriedades localizadas em uma ilha (Surto A), e nas margens (Surto B) do lago do Rincón del Bonete. Foram afetados ovinos de todas as idades, exceto cordeiros lactentes. Os primeiros sinais clínicos ocorreram no início de outubro e as mortes de dezembro a fevereiro. Morbidade de 10% foi observada nos Surtos A e B. A mortalidade foi de 7,2% e 2,8% nos Surtos A e B, respectivamente. Os sinais clínicos incluíram perda de peso, abdômen retraído, marcha rígida e cifose. Foram necropsiados um animal de cada rebanho. Observou-se mineralização arterial e pulmonar, nefrocalcinose e osteopetrose no exame macroscópico e histológico dos dois ovinos. Hiperplasia e carcinoma de células C da tireoide foram observados no ovino A. O ovino B apresentou hiperplasia de células C da tireoide e atrofia das células principais da paratireoide. As paratireoides do ovino A não foram examinadas. O diagnóstico diferencial da calcinose enzoótica no Sul da América do Sul deve considerar quatro plantas calcinogênicas da família Solanaceae: Solanum glaucophyllum, Solanum stuckertii, Nierembergia veitchii e Nierembergia rivularis.
650 $aOVINOS
650 $aURUGUAY
653 $aENZOOTIC CALCINOSIS
653 $aNIEREMBERGIA
653 $aPLATAFORMA DE INVESTIGACIÓN EN SALUD ANIMAL
653 $aPLATAFORMA DE SALUD ANIMAL
653 $aSHEEP DISEASES
700 1 $aSCHILD, C.
700 1 $aPRELIASCO, M.
700 1 $aBALSERINI, A.
700 1 $aMEDEIROS, R.M.T.
700 1 $aBARROS, S.S.
700 1 $aRIET-CORREA, F.
773 $tPesquisa Veterinaria Brasileira, November 2020, Volume 40, Issue 11, Pages 831-836. OPEN ACCESS. Doi: http://dx.doi.org/10.1590/1678-5150-pvb-6766
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