Registro Completo |
Biblioteca(s): |
Embrapa Pantanal. |
Data corrente: |
05/07/1996 |
Data da última atualização: |
05/07/1996 |
Autoria: |
HOLECHEK, J. L.; VAVRA, M.; PIEPER, R. D. |
Título: |
Botanical composition determination of range hebivore diets: a review. |
Ano de publicação: |
1982 |
Fonte/Imprenta: |
Journal of Range Management, v.35, n.3, p.309-315, May, 1982. |
Idioma: |
Inglês |
Conteúdo: |
Procedures used for estimating the botanical compopsition of the range herbivore's diet included diet observation, utilization techniques, fistula sampling, and fecal analysis. Each of these procedures has important limitations. Direct obsedrvation 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 oesophageal 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 materia. Recent studies show microhistological analysis can give an accurate representation of percent diet botanical composition by weight if observers use had compoiunde diets to check their accuracy. A new procedure, infrared spectrophotometry, may have considerable potential for evaluating herbivore diet botanical composition of fistula or fecal samples. MenosProcedures used for estimating the botanical compopsition of the range herbivore's diet included diet observation, utilization techniques, fistula sampling, and fecal analysis. Each of these procedures has important limitations. Direct obsedrvation 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 oesophageal 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 materia. Recent studies show microhistological analysis can give an accurate re... Mostrar Tudo |
Palavras-Chave: |
Herbivore; Herbivoro. |
Thesagro: |
Composição Botânica; Dieta. |
Thesaurus Nal: |
botanical composition; diet. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02365naa a2200217 a 4500 001 1789271 005 1996-07-05 008 1982 bl --- 0-- u #d 100 1 $aHOLECHEK, J. L. 245 $aBotanical composition determination of range hebivore diets$ba review. 260 $c1982 520 $aProcedures used for estimating the botanical compopsition of the range herbivore's diet included diet observation, utilization techniques, fistula sampling, and fecal analysis. Each of these procedures has important limitations. Direct obsedrvation 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 oesophageal 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 materia. Recent studies show microhistological analysis can give an accurate representation of percent diet botanical composition by weight if observers use had compoiunde diets to check their accuracy. A new procedure, infrared spectrophotometry, may have considerable potential for evaluating herbivore diet botanical composition of fistula or fecal samples. 650 $abotanical composition 650 $adiet 650 $aComposição Botânica 650 $aDieta 653 $aHerbivore 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.
Download
Esconder MarcMostrar Marc Completo |
Registro original: |
Embrapa Pantanal (CPAP) |
|