The dynamics of second‐ and third‐male fertilization precedence in <i>Tribolium castaneum</i>

Arnaud, Ludovic; Gage, Matthew J. G.; Haubruge, Éric

doi:10.1046/j.1570-7458.2001.00801.x

Cited by 36 publications

(31 citation statements)

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“…The similarity of the data from double-and triple-mating trials is consistent with other studies of spiders (e.g. Watson 1991) and insects (Lady and Tubman 1996;Arnaud et al 2001). More generally, these data suggest that the paternity of the first male to mate is not influenced by the intensity of sperm competition (sensu Parker 1998), but that the paternity of subsequently mating males is reduced with increasing intensity of sperm competition (see also Watson 1991).…”

Section: Discussionsupporting

confidence: 88%

“…However, this mating-order pattern disappears when females mate with three males, with each male fertilising a similar number of eggs (Zeh and Zeh 1994). In contrast, the number of mating partners does not change the pattern of first-male sperm precedence in the sierra dome spider, Neriene litigiosa (Watson 1991), or last-male sperm precedence in the beetles Tribolium castaneum (Arnaud et al 2001) and Callosobruchus maculatus (Lady and Tubman 1996). Nevertheless, the study by Zeh and Zeh (1994) suggests that it is unwise to infer patterns of sperm usage in matings involving more than two males from conventional double-mating experiments (Elgar 1998).…”

Section: Introductionmentioning

confidence: 95%

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Male mate choice and patterns of paternity in the polyandrous, sexually cannibalistic orb-web spider, Nephila plumipes

Elgar¹,

Bruce²,

Crespigny³

et al. 2003

Aust. J. Zool.

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Studies that investigate patterns of paternity in polyandrous species typically employ double-mating trials, in which the paternity share of each male is established by either the sterile male technique or using genetic markers. However, polyandrous females may mate with more than two males and, in some species, triple-mating trials produce different patterns of paternity from double-mating trials. We investigated patterns of paternity share in triple-mating trials of the sexually cannibalistic orb-web spider Nephila plumipes. These experiments reveal little quantitative changes to paternity share when more than two males mate with the female; the third male apparently diluted the fertilisation success of the second male but not of the first male. Sexual cannibalism had little impact on the fertilisation success of the first male, but greatly increased the fertilisation success of the third male. When offered a choice, males did not prefer to mate with virgin over mated females, but males that chose virgin females were significantly heavier than those that chose mated females.Z O 0 2 0 7 9 M a t e c h o i c e a n d p a t e r n i t y i n o r b -w e b s p i d e r s M . A . E l g a r e t a l .

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Section: Discussionsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 95%

Male mate choice and patterns of paternity in the polyandrous, sexually cannibalistic orb-web spider, Nephila plumipes

Elgar¹,

Bruce²,

Crespigny³

et al. 2003

Aust. J. Zool.

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“…This migrant theoretically could mask genetic load, thereby reducing inbreeding depression, or it could provide variation that would facilitate adaptation to the environment without altering the demographics of the experimental populations. The sex of the migrant was unknown, and females likely had mated already with SF males; however, due to sperm precedence, sperm from subsequent matings with beetles from the experimental populations were likely to produce outcrossed offspring (39). The unknown sex and mating status of the migrant beetles are likely to have increased variation in responses to rescue, and thus increase the robustness of our results.…”

Section: Methodsmentioning

confidence: 92%

Three types of rescue can avert extinction in a changing environment

Hufbauer

Szűcs

Kasyon

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

161

189

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Setting aside high-quality large areas of habitat to protect threatened populations is becoming increasingly difficult as humans fragment and degrade the environment. Biologists and managers therefore must determine the best way to shepherd small populations through the dual challenges of reductions in both the number of individuals and genetic variability. By bringing in additional individuals, threatened populations can be increased in size (demographic rescue) or provided with variation to facilitate adaptation and reduce inbreeding (genetic rescue). The relative strengths of demographic and genetic rescue for reducing extinction and increasing growth of threatened populations are untested, and which type of rescue is effective may vary with population size. Using the flour beetle (Tribolium castaneum) in a microcosm experiment, we disentangled the genetic and demographic components of rescue, and compared them with adaptation from standing genetic variation (evolutionary rescue in the strictest sense) using 244 experimental populations founded at either a smaller (50 individuals) or larger (150 individuals) size. Both types of rescue reduced extinction, and those effects were additive. Over the course of six generations, genetic rescue increased population sizes and intrinsic fitness substantially. Both large and small populations showed evidence of being able to adapt from standing genetic variation. Our results support the practice of genetic rescue in facilitating adaptation and reducing inbreeding depression, and suggest that demographic rescue alone may suffice in larger populations even if only moderately inbred individuals are available for addition.genetic rescue | extinction | migration | evolutionary rescue | adaptation H uman activities, climate change, and habitat loss are putting thousands of species at risk for extinction (1). Traditional conservation approaches that concentrate on improving habitat quality and size are becoming challenging to implement as human populations expand and degrade natural resources at an ever increasing rate. Thus, conservation efforts that are constrained by the availability of habitat may instead need to focus on improving a species' prospect of survival by maintaining sufficient population sizes and supporting the ability of populations to adapt to changing conditions. The most successful approaches are likely to be eco-evolutionary in focus, and thus aim to manipulate evolutionary processes such as inbreeding and the potential for adaptation, to influence ecological dynamics and, ultimately, population persistence.Eco-evolutionary approaches often rely on facilitating movement of individuals among small, threatened populations (2). Brown and Kodric-Brown (3) showed theoretically that immigration in natural systems can save small populations from extinction and referred to this process as the "rescue effect." This phenomenon has since been well documented (4-8), and human-facilitated immigration has been used to rescue populations threatened by degraded habitat o...

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“…In many species, including C. frigida, females are known to mate with more than two males. Studies that have used more than two males have found evidence that LMSP may break down in some species (Zeh and Zeh, 1994;Radwan, 1997;Drnevich, 2003), although this is not always the case (Arnaud et al, 2001). We have estimated that some C. frigida females may mate with hundreds of different males during their lifespan (Blyth and Gilburn, unpublished results).…”

Section: Discussionmentioning

confidence: 99%

The effect of an inversion system and the time interval between matings on postcopulatory sexual selection in the seaweed fly, Coelopa frigida

Blyth

Gilburn

2005

Heredity

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The seaweed fly, Coelopa frigida, exhibits LMSP. A large chromosomal inversion system affects many traits including egg-to-adult viability via heterosis. Consequently, there is also considerable potential for cryptic female mate choice to operate on the basis of sperm karyotype. Here, we investigated the effect of time interval and chromosomal inversion karyotype on postcopulatory sexual selection. Homokaryotypic females were mated with a male of the same and a male of the opposite homokaryotype. The order of the matings was varied so cryptic female mate choice could operate either in concert or antagonistically with LMSP. LMSP was found when there was a 24 h time interval between matings, irrespective of the order in which the males were mated. However, when the males were mated in quick succession the order of mating was important. When LMSP and cryptic female mate choice work in concert a high level of LMSP was found. However, when the male of opposite homokaryotype mated first, then first male sperm precedence was observed. This suggests that polyandrous females might be able to bias paternity but only when matings occur in quick succession. Consequently, population density is likely to affect the operation of postcopulatory sexual selection. Heredity (2005) 95, 174-178.

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The dynamics of second‐ and third‐male fertilization precedence in Tribolium castaneum

Cited by 36 publications

References 36 publications

Male mate choice and patterns of paternity in the polyandrous, sexually cannibalistic orb-web spider, Nephila plumipes

Male mate choice and patterns of paternity in the polyandrous, sexually cannibalistic orb-web spider, Nephila plumipes

Three types of rescue can avert extinction in a changing environment

The effect of an inversion system and the time interval between matings on postcopulatory sexual selection in the seaweed fly, Coelopa frigida

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