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Registro Completo
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
25/09/2008 |
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Data da última atualização: |
25/09/2008 |
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Autoria: |
PORTO, P. G.; DOMÍNGUEZ, J.; VELANDO, A. |
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Título: |
Effects of mating frequency on sex allocation in the simultaneously hermaphroditic redworm (Eisenia andrei). |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
In: INTERNATIONAL COLLOQUIUM ON SOIL ZOOLOGY, 15; INTERNATIONAL COLLOQUIUM ON APTERYGOTA, 12., 2008, Curitiba. Biodiversity, conservation and sustainabele management of soil animal: abstracts. Colombo: Embrapa Florestas. Editors: George Gardner Brown; Klaus Dieter Sautter; Renato Marques; Amarildo Pasini. 1 CD-ROM. |
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Idioma: |
Inglês |
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Conteúdo: |
Simultaneous hermaphrodites have both functional female and male reproductive organs and a
limited amount of reproductive resources for both sexual functions and therefore are selected to
optimize their investment in the two sexual functions. Sex allocation theory provides evolutionary
arguments for explaining patterns of relative investment in male versus female function in
hermaphrodites. Models for simultaneous hermaphrodites typically predict the constant optimal
sex allocation (relative investment in male vs. female function) independent of individual or
environmental conditions. Sex allocation theory predicts that, in promiscuous mating conditions,
simultaneous hermaphrodites should adjust their reproductive investment, invest more resources
into the male than into the female function. In contrast, in monogamy, hermaphrodites should
invest more resources in the female function at the expenses of the male function. Such flexibility
also provides the possibility to influence sex allocation in the mating partner. To investigate this
idea, we measured egg production (female investment) and sperm production as well as
spermathecae size (both are part of male investment) under different mating regimes in the
redworm Eisenia andrei. |
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Categoria do assunto: |
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Marc: |
LEADER 01957naa a2200145 a 4500
001 1314954
005 2008-09-25
008 2008 bl uuuu u00u1 u #d
100 1 $aPORTO, P. G.
245 $aEffects of mating frequency on sex allocation in the simultaneously hermaphroditic redworm (Eisenia andrei).
260 $c2008
520 $aSimultaneous hermaphrodites have both functional female and male reproductive organs and a limited amount of reproductive resources for both sexual functions and therefore are selected to optimize their investment in the two sexual functions. Sex allocation theory provides evolutionary arguments for explaining patterns of relative investment in male versus female function in hermaphrodites. Models for simultaneous hermaphrodites typically predict the constant optimal sex allocation (relative investment in male vs. female function) independent of individual or environmental conditions. Sex allocation theory predicts that, in promiscuous mating conditions, simultaneous hermaphrodites should adjust their reproductive investment, invest more resources into the male than into the female function. In contrast, in monogamy, hermaphrodites should invest more resources in the female function at the expenses of the male function. Such flexibility also provides the possibility to influence sex allocation in the mating partner. To investigate this idea, we measured egg production (female investment) and sperm production as well as spermathecae size (both are part of male investment) under different mating regimes in the redworm Eisenia andrei.
700 1 $aDOMÍNGUEZ, J.
700 1 $aVELANDO, A.
773 $tIn: INTERNATIONAL COLLOQUIUM ON SOIL ZOOLOGY, 15; INTERNATIONAL COLLOQUIUM ON APTERYGOTA, 12., 2008, Curitiba. Biodiversity, conservation and sustainabele management of soil animal: abstracts. Colombo: Embrapa Florestas. Editors: George Gardner Brown; Klaus Dieter Sautter; Renato Marques; Amarildo Pasini. 1 CD-ROM.
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