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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
09/09/1996 |
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Data da última atualização: |
10/09/2010 |
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Autoria: |
HOLECHEK, J. L.; VAVRA, M.; PIEPER, R. D. |
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Título: |
Botanical composition determination of range herbivore diets: a review. |
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Ano de publicação: |
1982 |
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Fonte/Imprenta: |
Journal of Range Management, v.35, n.3, p.309-315, May, 1982. |
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Idioma: |
Inglês |
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Conteúdo: |
Procedures used for estimating the botanical composition of the range herbivore's diet include diet observation, utilization techniques, fistula sampling, and fecal analysis. each of these procedures has important limitations. Direct observation requires minimal time and equipment inputs but accuracy and precision are a problem, particularly with wild animals. Utilization studies are generally unsuitable when plants are actively growing and more than one herbivore is using the area under study. Fistula methods are accurate but are difficult to use with wild animals. In addition they are costly and require considerable time. The esophageal fistula is preferable to the rumen fistula because it provides more accurate information and requires less labor. Stomach analysis involves animal sacrifice and, therefore, is generally restricted to wild animals with large populations. However, trocar sampling of the rumen contents is a new method that avoids this problem. Fecal analysis has been used extensively in recent years to evaluate diet botanical composition of wild herbivores. This procedure gives good precision but accuracy is a problem because of differential digestion between plant species. Techniques are available that can be used to reduce this source of error. Microhistological analysis has become the most widely used method for quantifying botanical composition of masticated forage or fecal material. Recent studies show microhistological analysis can give an accurate representation of percent diet botanical composition by weight if observers use had compounded diets to check their accuracy. A new procedure, infrared spectrophotometry, may have considerable potential for evaluating diet botaniocal composition of fistula or fecal samples. MenosProcedures used for estimating the botanical composition of the range herbivore's diet include diet observation, utilization techniques, fistula sampling, and fecal analysis. each of these procedures has important limitations. Direct observation requires minimal time and equipment inputs but accuracy and precision are a problem, particularly with wild animals. Utilization studies are generally unsuitable when plants are actively growing and more than one herbivore is using the area under study. Fistula methods are accurate but are difficult to use with wild animals. In addition they are costly and require considerable time. The esophageal fistula is preferable to the rumen fistula because it provides more accurate information and requires less labor. Stomach analysis involves animal sacrifice and, therefore, is generally restricted to wild animals with large populations. However, trocar sampling of the rumen contents is a new method that avoids this problem. Fecal analysis has been used extensively in recent years to evaluate diet botanical composition of wild herbivores. This procedure gives good precision but accuracy is a problem because of differential digestion between plant species. Techniques are available that can be used to reduce this source of error. Microhistological analysis has become the most widely used method for quantifying botanical composition of masticated forage or fecal material. Recent studies show microhistological analysis can give an accurate repre... Mostrar Tudo |
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Palavras-Chave: |
Herbivore diets; Herbivoro. |
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Thesagro: |
Composição Botânica; Dieta. |
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Thesaurus Nal: |
botanical composition. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02339naa a2200205 a 4500
001 1789667
005 2010-09-10
008 1982 bl --- 0-- u #d
100 1 $aHOLECHEK, J. L.
245 $aBotanical composition determination of range herbivore diets$ba review.
260 $c1982
520 $aProcedures used for estimating the botanical composition of the range herbivore's diet include diet observation, utilization techniques, fistula sampling, and fecal analysis. each of these procedures has important limitations. Direct observation requires minimal time and equipment inputs but accuracy and precision are a problem, particularly with wild animals. Utilization studies are generally unsuitable when plants are actively growing and more than one herbivore is using the area under study. Fistula methods are accurate but are difficult to use with wild animals. In addition they are costly and require considerable time. The esophageal fistula is preferable to the rumen fistula because it provides more accurate information and requires less labor. Stomach analysis involves animal sacrifice and, therefore, is generally restricted to wild animals with large populations. However, trocar sampling of the rumen contents is a new method that avoids this problem. Fecal analysis has been used extensively in recent years to evaluate diet botanical composition of wild herbivores. This procedure gives good precision but accuracy is a problem because of differential digestion between plant species. Techniques are available that can be used to reduce this source of error. Microhistological analysis has become the most widely used method for quantifying botanical composition of masticated forage or fecal material. Recent studies show microhistological analysis can give an accurate representation of percent diet botanical composition by weight if observers use had compounded diets to check their accuracy. A new procedure, infrared spectrophotometry, may have considerable potential for evaluating diet botaniocal composition of fistula or fecal samples.
650 $abotanical composition
650 $aComposição Botânica
650 $aDieta
653 $aHerbivore diets
653 $aHerbivoro
700 1 $aVAVRA, M.
700 1 $aPIEPER, R. D.
773 $tJournal of Range Management$gv.35, n.3, p.309-315, May, 1982.
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Registro original: |
Embrapa Pantanal (CPAP) |
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