Acute toxic plant estimation in grazing sheep ingesta and feces

'Romerillo' (Baccharis coridifolia DC), 'duraznillo negro' (Cestrum parqui L'Hérit.), and 'sunchillo' (Wedelia glauca (Ort.) Hoff.) are highly toxic species producing important economic losses of livestock in Argentina. This study assessed the accuracy and precisio...

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Autor principal: Cid, M.S
Otros Autores: López, T.A, Yagueddú, C., Brizuela, M.A
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: Society for Range Management 2003
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Acceso en línea:Registro en Scopus
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030 |a JRMGA 
100 1 |a Cid, M.S. 
245 1 0 |a Acute toxic plant estimation in grazing sheep ingesta and feces 
260 |b Society for Range Management  |c 2003 
270 1 0 |m Cid, M.S.; Facultad de Ciencias Agrarias (FCA), Univ. Nacional de Mar del Plata, cc 276, (7620) Balcarce, Buenos Aires, Argentina 
506 |2 openaire  |e Política editorial 
504 |a Holechek, J.L., Gross, B., Training needed for quantifying simulated diets from fragmented range plants (1982) J. Range Manage., 35, pp. 644-647 
504 |a Holechek, J., Valdez, R., Evaluation of in vitro digestion for improving botanical estimates of mule deer fecal samples (1985) J. Mamm., 66, pp. 574-577 
504 |a Holechek, J.L., Vavra, M., Pieper, R.D., Methods for determining the botanical composition, similarity, and overlap of range herbivore diets (1984) Developing Strategies for Rangeland Management, pp. 425-471. , National Research Council/National Academy of Science (eds.). Westview Press, Boulder, Colo, USA 
504 |a Holechek, J.L., Gross, B., Dabo, S.M., Stephenson, T., Effects of sample preparation, growth stage, and observer on microhistological analysis of herbivore diets (1982) J. Wildl. Manage., 46, pp. 502-505 
504 |a Leislie, D.M., Martin, J.R., Starkey, E.E., Slater, R.C., Correcting for differential digestibility in microhistological analysis involving common coastal plants of the Pacific Northwest (1983) J. Range Manage., 36, pp. 730-732 
504 |a López, T.A., Spinelli, R., Villar, J., Effects of Cestrum parqui L'Hérit. dosification in sheep and cattle (1978) Gaceta Veterinaria, 40, pp. 642-650 
504 |a Platonow, N.S., López, T.A., Wedelia glauca. Studies of Its Toxicity (1978) Producción Animal, 6, pp. 620-625 
504 |a Samuel, M.J., Howard, G.S., Disappearing forbs in microhistological analysis of diets (1983) J. Range Manage., 36, pp. 132-133 
504 |a Sparks, D.R., Malechek, J.C., Estimating percentage dry weight in diets using a microscope technique (1968) J. Range Manage., 21, pp. 264-265 
504 |a Tilley, J.M.A., Terry, R.A., A two-stage technique for the in vitro digestion of forage crops (1963) J. Brit. Grassl. Soc., 18, pp. 104-111 
504 |a Yagueddú, C., Cid, M.S., López, T.A., Microhistological analysis of sheep gastro-intestinal content to confirm poisonous plant ingestion (1998) J. Range Manage., 51, pp. 655-660 
520 3 |a 'Romerillo' (Baccharis coridifolia DC), 'duraznillo negro' (Cestrum parqui L'Hérit.), and 'sunchillo' (Wedelia glauca (Ort.) Hoff.) are highly toxic species producing important economic losses of livestock in Argentina. This study assessed the accuracy and precision in the estimation of the percentage and the mass of these species in the ingesta and feces of sheep experimentally poisoned. This study also evaluated whether the quantified percentage and the calculated mass of each toxic species in the rumen+reticulum, the easiest region to sample, are good estimates of their relative consumption. Results indicate that if species fragment density is quantified, and the percentages of non recognized fragments of the toxic species in their in vitro digestion residues are accounted for (attributing some proportion of the unidentified fragment pool to the target species), estimations are accurate, but their precision differ among species. For a 3 sheep sample, the average mass estimated by microhistological analysis represented 92.3 ± 5.8 (romerillo), 96.5 ± 17.3 (duraznillo negro), and 92.0 ± 12.5% (sunchillo) (P < 0.10) of the actual amount of each species consumed. The percentages of the toxic species in the total ingesta plus feces produced since the intoxication did not differ (P > 0.05) from those in the rumen+reticulum. For the evaluated species, the microhistological analysis of the rumen+reticulum not only confirmed the ingestion of the toxic species, but also adequately estimated the percentage in which they were ingested.  |l eng 
593 |a Facultad de Ciencias Agrarias (FCA), Univ. Nacional de Mar del Plata, cc 276, (7620) Balcarce, Buenos Aires, Argentina 
593 |a Consejo Nac. de Invest. Cie. y Tec., Comn. Invest. Cie. Provincia B., Buenos Aires, Argentina 
593 |a Departamento de Biología, Fac. de Ciencias Exactas y Naturales, UNMdP, Buenos Aires, Argentina 
690 1 0 |a ACCURACY 
690 1 0 |a BACCHARIS CORIDIFOLIA 
690 1 0 |a CESTRUM PARQUI 
690 1 0 |a MICROHISTOLOGICAL TECHNIQUE 
690 1 0 |a WEDELIA GLAUCA 
690 1 0 |a ACCURACY ASSESSMENT 
690 1 0 |a ESTIMATION METHOD 
690 1 0 |a FECES 
690 1 0 |a GRAZING 
690 1 0 |a SHEEP 
690 1 0 |a STOMACH CONTENT 
690 1 0 |a TOXIC ORGANISM 
690 1 0 |a BACCHARIS 
690 1 0 |a BACCHARIS CORIDIFOLIA 
690 1 0 |a BACCHARIS CORIDIFOLIA 
690 1 0 |a BIDENS ALBA 
690 1 0 |a CESTRUM PARQUI 
690 1 0 |a CESTRUM PARQUI 
690 1 0 |a OVIS ARIES 
690 1 0 |a PASCALIA GLAUCA 
690 1 0 |a VERTEBRATA 
690 1 0 |a WEDELIA 
690 1 0 |a WEDELIA GLAUCA 
650 1 7 |2 spines  |a PRECISION 
650 1 7 |2 spines  |a PRECISION 
700 1 |a López, T.A. 
700 1 |a Yagueddú, C. 
700 1 |a Brizuela, M.A. 
773 0 |d Society for Range Management, 2003  |g v. 56  |h pp. 353-357  |k n. 4  |p J. Range Manage.  |x 0022409X  |t Journal of Range Management 
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