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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
25/07/2001 |
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Data da última atualização: |
30/03/2017 |
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Autoria: |
NORRDAHL, K.; KORPIMAKI, E. |
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Título: |
The impact of predation risk from small mustelids on prey populations. |
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Ano de publicação: |
2000 |
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Fonte/Imprenta: |
Mammal Review, v.30, n.3/4, p.147-156, 2000. |
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Idioma: |
Inglês |
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Conteúdo: |
Small mustelids are snake-like mammals adapted to hunt small rodents, which are their principal prey, in tunnels leaving practically no refuge for the prey. Prey rodent have adaptive behaviours to situation where the predation risk from mustelids is high, including reduced activity and escape by climbing. Small mustelids may affect prey population dynamics directly throught killing (increased mortality) and/or indirectly throught behavioural changes in prey as a response to the presence of mustelids (predation risk). The Predator-Induced Breeding Suppression hypothesis (PIBS) states that a trade-off between survival and reproduction should lead to delayed breedings under temporarily high predation risk, so that the mere presence of predators may reduce reproductive output. Current results suggest that small mustelids mainly affect prey population growth rate directly throught killing. In many cyclic rodent populations, small mustelid predation is a major mortality factor, and experimental evidence supports the hypothesis that these predators drive prolonged summer declines in prey. In contrast, the evidence for PIBS is controversial. Experimental evidence shows that the indirect effects of small mustelids on prey populations are negligible during the best breeding season. However, in other seasons, the presence of predators may indirectly affect prey population, although this has not been studied experimentally. Prey rodents may decrease mobility as a responde to high predation risk by small mustelids, and this reduction in mobility decreases feeding. Reduced feeding affects the energy reserves of voles, and may delay maturation or lower the size of the first litter. MenosSmall mustelids are snake-like mammals adapted to hunt small rodents, which are their principal prey, in tunnels leaving practically no refuge for the prey. Prey rodent have adaptive behaviours to situation where the predation risk from mustelids is high, including reduced activity and escape by climbing. Small mustelids may affect prey population dynamics directly throught killing (increased mortality) and/or indirectly throught behavioural changes in prey as a response to the presence of mustelids (predation risk). The Predator-Induced Breeding Suppression hypothesis (PIBS) states that a trade-off between survival and reproduction should lead to delayed breedings under temporarily high predation risk, so that the mere presence of predators may reduce reproductive output. Current results suggest that small mustelids mainly affect prey population growth rate directly throught killing. In many cyclic rodent populations, small mustelid predation is a major mortality factor, and experimental evidence supports the hypothesis that these predators drive prolonged summer declines in prey. In contrast, the evidence for PIBS is controversial. Experimental evidence shows that the indirect effects of small mustelids on prey populations are negligible during the best breeding season. However, in other seasons, the presence of predators may indirectly affect prey population, although this has not been studied experimentally. Prey rodents may decrease mobility as a responde to high predat... Mostrar Tudo |
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Palavras-Chave: |
Anti-predador; Anti-predator; Behaviour; Comportamento; Dinamica de populacao; Mustelid; Rato silvestre; Vole. |
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Thesaurus Nal: |
population dynamics. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02329naa a2200241 a 4500
001 1807716
005 2017-03-30
008 2000 bl --- 0-- u #d
100 1 $aNORRDAHL, K.
245 $aThe impact of predation risk from small mustelids on prey populations.
260 $c2000
520 $aSmall mustelids are snake-like mammals adapted to hunt small rodents, which are their principal prey, in tunnels leaving practically no refuge for the prey. Prey rodent have adaptive behaviours to situation where the predation risk from mustelids is high, including reduced activity and escape by climbing. Small mustelids may affect prey population dynamics directly throught killing (increased mortality) and/or indirectly throught behavioural changes in prey as a response to the presence of mustelids (predation risk). The Predator-Induced Breeding Suppression hypothesis (PIBS) states that a trade-off between survival and reproduction should lead to delayed breedings under temporarily high predation risk, so that the mere presence of predators may reduce reproductive output. Current results suggest that small mustelids mainly affect prey population growth rate directly throught killing. In many cyclic rodent populations, small mustelid predation is a major mortality factor, and experimental evidence supports the hypothesis that these predators drive prolonged summer declines in prey. In contrast, the evidence for PIBS is controversial. Experimental evidence shows that the indirect effects of small mustelids on prey populations are negligible during the best breeding season. However, in other seasons, the presence of predators may indirectly affect prey population, although this has not been studied experimentally. Prey rodents may decrease mobility as a responde to high predation risk by small mustelids, and this reduction in mobility decreases feeding. Reduced feeding affects the energy reserves of voles, and may delay maturation or lower the size of the first litter.
650 $apopulation dynamics
653 $aAnti-predador
653 $aAnti-predator
653 $aBehaviour
653 $aComportamento
653 $aDinamica de populacao
653 $aMustelid
653 $aRato silvestre
653 $aVole
700 1 $aKORPIMAKI, E.
773 $tMammal Review$gv.30, n.3/4, p.147-156, 2000.
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Registro original: |
Embrapa Pantanal (CPAP) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Soja. Para informações adicionais entre em contato com valeria.cardoso@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
20/11/2003 |
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Data da última atualização: |
20/11/2003 |
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Autoria: |
HAGEN, M. E. K.; MENDES, R. H.; FERNANDES, T. R.; BELLÓ-KLEIN, A.; MANDARINO, J. M. G. |
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Título: |
Efeito antioxidante da proteína de soja (Samprosoy LH 90) e germén de soja e sua relação com o conteudo de isoflavonas. |
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Ano de publicação: |
2002 |
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Fonte/Imprenta: |
In: CONGRESSO DE CARDIOLOGIA DO RIO GRANDE DO SUL, 13.; SIMPÓSIO DE NUTRIÇÃO EM CARDIOLOGIA, 1.; SIMPÓSIO DE FISIOTERAPIA EM CARDIOLOGIA, 1.; SIMPÓSIO DE ENFERMAGEM EM CARDIOLOGIA, 1., 2002, Gramado. Programa... Gramado, 2002. Não paginado. |
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Idioma: |
Português |
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Notas: |
Seção Pôsteres número 6. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00755naa a2200169 a 4500
001 1468827
005 2003-11-20
008 2002 bl --- 0-- u #d
100 1 $aHAGEN, M. E. K.
245 $aEfeito antioxidante da proteína de soja (Samprosoy LH 90) e germén de soja e sua relação com o conteudo de isoflavonas.
260 $c2002
500 $aSeção Pôsteres número 6.
700 1 $aMENDES, R. H.
700 1 $aFERNANDES, T. R.
700 1 $aBELLÓ-KLEIN, A.
700 1 $aMANDARINO, J. M. G.
773 $tIn: CONGRESSO DE CARDIOLOGIA DO RIO GRANDE DO SUL, 13.; SIMPÓSIO DE NUTRIÇÃO EM CARDIOLOGIA, 1.; SIMPÓSIO DE FISIOTERAPIA EM CARDIOLOGIA, 1.; SIMPÓSIO DE ENFERMAGEM EM CARDIOLOGIA, 1., 2002, Gramado. Programa... Gramado, 2002. Não paginado.
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