|
Registro Completo |
|
Biblioteca(s): |
Embrapa Pantanal. |
|
Data corrente: |
12/02/1996 |
|
Data da última atualização: |
12/02/1996 |
|
Autoria: |
LEVINE, N. D.; TODD JUNIOR, K. S. |
|
Título: |
Micrometeorological factors involved in development and survival of free-living stages of the sheep nematodes Haemonchus contortus and Trichostrongylus colubriformis. |
|
Ano de publicação: |
1975 |
|
Fonte/Imprenta: |
International Journal Biometeorology, v.19, n.3, p.174-183, 1975. |
|
Idioma: |
Inglês |
|
Conteúdo: |
Temperature and soil moisture are the most important factors affecting the development and survival of haemonchus contortus and Trichostrongylys columbriformis eggs and larvae on pasture. More than half of the eggs develop into infective larvae in the laborato-
ry, but a very low percentage (0.03% for H. contortus) does so on pasture. there is a marked difference between H. contiortus and T. colubriformis in survival on infective larvae. H. contortus larvae survided in the winter at Urbana poorly, whereas T. colubrifor-
mis did well. The former durvived better in the spring and worse in the sdummer, while both survived equally well in the fall. Technics for larval recovery from pasture are not very efficient. Meteorologic conditions at ground level where the larvae exist are quite different from those in a standard weather shelter 1.6 m above the ground. Bioclimatographs in which mean monthly maximum temperatures are plotted against total monthly precipitation are fairly good in predicting the type of nematode liable to be important in a given region, but they are too simplistic to be relied on for more than approximations. |
|
Palavras-Chave: |
Desenvolvimento; Development; Fator micrometeorologico; Free-living stages; Hamonchus contortus; Micrometeorological factor; Nematode; Parasita; Parasite; Survival. |
|
Thesagro: |
Carneiro; Nematóide; Sobrevivência. |
|
Thesaurus Nal: |
sheep; Trichostrongylus colubriformis. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 02098naa a2200313 a 4500
001 1787232
005 1996-02-12
008 1975 bl --- 0-- u #d
100 1 $aLEVINE, N. D.
245 $aMicrometeorological factors involved in development and survival of free-living stages of the sheep nematodes Haemonchus contortus and Trichostrongylus colubriformis.
260 $c1975
520 $aTemperature and soil moisture are the most important factors affecting the development and survival of haemonchus contortus and Trichostrongylys columbriformis eggs and larvae on pasture. More than half of the eggs develop into infective larvae in the laborato- ry, but a very low percentage (0.03% for H. contortus) does so on pasture. there is a marked difference between H. contiortus and T. colubriformis in survival on infective larvae. H. contortus larvae survided in the winter at Urbana poorly, whereas T. colubrifor- mis did well. The former durvived better in the spring and worse in the sdummer, while both survived equally well in the fall. Technics for larval recovery from pasture are not very efficient. Meteorologic conditions at ground level where the larvae exist are quite different from those in a standard weather shelter 1.6 m above the ground. Bioclimatographs in which mean monthly maximum temperatures are plotted against total monthly precipitation are fairly good in predicting the type of nematode liable to be important in a given region, but they are too simplistic to be relied on for more than approximations.
650 $asheep
650 $aTrichostrongylus colubriformis
650 $aCarneiro
650 $aNematóide
650 $aSobrevivência
653 $aDesenvolvimento
653 $aDevelopment
653 $aFator micrometeorologico
653 $aFree-living stages
653 $aHamonchus contortus
653 $aMicrometeorological factor
653 $aNematode
653 $aParasita
653 $aParasite
653 $aSurvival
700 1 $aTODD JUNIOR, K. S.
773 $tInternational Journal Biometeorology$gv.19, n.3, p.174-183, 1975.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Pantanal (CPAP) |
