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 | Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
01/08/1992 |
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Data da última atualização: |
02/06/2023 |
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Autoria: |
GREGORY, P. W.; MILLER, R. F.; STEWART, M. A. |
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Título: |
An analysis of environmental and genetic factors influencing stomach-worm infestation in sheep. |
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Ano de publicação: |
1940 |
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Fonte/Imprenta: |
Journal Genetical, v. 39, p. 391-400, 1940. |
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Idioma: |
Inglês |
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Conteúdo: |
Faecal examination for Trichostrongyle eggs of ewes of known ages sired by two different rams were made weekly over a period of two months from September to November 1937. All data on the egg counts were quantitative. Though the numbers of ewes studied were somewhat limited, the results were consistent and indicate that at least three different factors influence the degree of stomach-worm infestation. The season of the year is the first variable. Age of the ewe is the second, although, in these data, age beyond 2 years 8 months ceased to be important. The third and most important variable influencing stomach-worm infestation is genetic constitution for resistance and susceptibility. Judging from these results, genetic selection should effectively change the degree of resistance or susceptibility in populations of sheep. |
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Palavras-Chave: |
Controle. |
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Thesagro: |
Ovino; Parasitologia. |
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Thesaurus Nal: |
Animal parasitic nematodes; Environmental factors; Gastrointestinal nematodes; Nematode control; Nematode infections; Parasitology; Sheep diseases; Teladorsagia circumcincta. |
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Categoria do assunto: |
H Saúde e Patologia |
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Marc: |
LEADER 01650naa a2200277 a 4500
001 1521192
005 2023-06-02
008 1940 bl uuuu u00u1 u #d
100 1 $aGREGORY, P. W.
245 $aAn analysis of environmental and genetic factors influencing stomach-worm infestation in sheep.$h[electronic resource]
260 $c1940
520 $aFaecal examination for Trichostrongyle eggs of ewes of known ages sired by two different rams were made weekly over a period of two months from September to November 1937. All data on the egg counts were quantitative. Though the numbers of ewes studied were somewhat limited, the results were consistent and indicate that at least three different factors influence the degree of stomach-worm infestation. The season of the year is the first variable. Age of the ewe is the second, although, in these data, age beyond 2 years 8 months ceased to be important. The third and most important variable influencing stomach-worm infestation is genetic constitution for resistance and susceptibility. Judging from these results, genetic selection should effectively change the degree of resistance or susceptibility in populations of sheep.
650 $aAnimal parasitic nematodes
650 $aEnvironmental factors
650 $aGastrointestinal nematodes
650 $aNematode control
650 $aNematode infections
650 $aParasitology
650 $aSheep diseases
650 $aTeladorsagia circumcincta
650 $aOvino
650 $aParasitologia
653 $aControle
700 1 $aMILLER, R. F.
700 1 $aSTEWART, M. A.
773 $tJournal Genetical$gv. 39, p. 391-400, 1940.
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| 1. |  | NEVES, T. dos S.; CARPANEZZI, A. A.; RIBAS, D. C. Z.; MARENCO, R. A. Enraizamento de corticeira-da-serra em função do tipo de estaca e variações sazonais. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 41, n. 12, p. 1699-1705, dez. 2006 Título em inglês: Rooting of Brazilian coral as a function of cutting types and season of the year.| Biblioteca(s): Embrapa Unidades Centrais. |
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