Mate choice and reproductive conflict in simultaneous hermaphrodites

Anthes, Nils

doi:10.1007/978-3-642-02624-9_12

Cited by 47 publications

(42 citation statements)

References 130 publications

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“…However, this statement needs qualification in that Darwin's view of sexual selection was restricted to the pre-copulatory level and was primarily focused on secondary sexual traits, as is evident from his statement that 'with animals belonging to the lower classes, the two sexes are not rarely united in the same individual, and therefore secondary sexual characters cannot be developed'. While pre-copulatory sexual selection is clearly importantand secondary sexual characters very prevalent-in gonochorists [34,35], evidence from hermaphrodites for choice of mating partners-let alone concrete traits involved in such choiceremains scarce [36], and evidence for competition for access to mating partners may even be lacking entirely. The available empirical examples of mate choice include, on the one hand, preferences for large partners, which can lead to sizeassortative mating (e.g.…”

Section: Pre-versus Post-copulatory Sexual Selection In Simultaneous mentioning

confidence: 99%

“…Indeed, much of what we currently know about sexual selection in hermaphrodites appears to occur at the post-copulatory level [36,[49][50][51][52][53], including the highly variable allocation to sperm production under different competition scenarios that we mentioned in §2 when discussing LSC. In §5, we discuss a range of additional mechanisms of post-copulatory sexual selection, how they may affect LSC and thus the evolution of sex allocation and how their interaction could potentially lead to sexual conflicts (see also [11]).…”

Section: Pre-versus Post-copulatory Sexual Selection In Simultaneous mentioning

confidence: 99%

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Sex allocation and investment into pre- and post-copulatory traits in simultaneous hermaphrodites: the role of polyandry and local sperm competition

Schärer

Pen

2013

Phil. Trans. R. Soc. B

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Sex allocation theory predicts the optimal allocation to male and female reproduction in sexual organisms. In animals, most work on sex allocation has focused on species with separate sexes and our understanding of simultaneous hermaphrodites is patchier. Recent theory predicts that sex allocation in simultaneous hermaphrodites should strongly be affected by post-copulatory sexual selection, while the role of pre-copulatory sexual selection is much less clear. Here, we review sex allocation and sexual selection theory for simultaneous hermaphrodites, and identify several strong and potentially unwarranted assumptions. We then present a model that treats allocation to sexually selected traits as components of sex allocation and explore patterns of allocation when some of these assumptions are relaxed. For example, when investment into a male sexually selected trait leads to skews in sperm competition, causing local sperm competition, this is expected to lead to a reduced allocation to sperm production. We conclude that understanding the evolution of sex allocation in simultaneous hermaphrodites requires detailed knowledge of the different sexual selection processes and their relative importance. However, little is currently known quantitatively about sexual selection in simultaneous hermaphrodites, about what the underlying traits are, and about what drives and constrains their evolution. Future work should therefore aim at quantifying sexual selection and identifying the underlying traits along the pre- to post-copulatory axis.

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Section: Pre-versus Post-copulatory Sexual Selection In Simultaneous mentioning

confidence: 99%

Section: Pre-versus Post-copulatory Sexual Selection In Simultaneous mentioning

confidence: 99%

Sex allocation and investment into pre- and post-copulatory traits in simultaneous hermaphrodites: the role of polyandry and local sperm competition

Schärer

Pen

2013

Phil. Trans. R. Soc. B

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“…In the last few decades, there has been increasing attention on sexual selection in such hermaphroditic organisms (reviewed in Anthes, 2010;Leonard, 2013;Nakadera and Koene, 2013). Theoretical studies have suggested that the influences of sexual selection are significant in simultaneous hermaphrodites, as they are in species with separate sexes (Charnov, 1979;Michiels and Koene, 2006).…”

Section: Introductionmentioning

confidence: 99%

Common effect of the mucus transferred during mating in two dart-shooting snail species from different families

Kimura

Chiba

Koene

2014

Journal of Experimental Biology

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Several taxa of pulmonate land snails exhibit a conspicuous mating behaviour, the shooting of so-called love darts. During mating, such land snail species stab a mating partner with a mucus-coated dart. It has previously been shown that the sperm donor physiologically influences the sperm recipient via the mucus covering the dart and thereby decreases the number of sperm digested by the recipient. However, the generality of this effect of the dart's mucus is unclear, because almost all the previous studies on the effect of the mucus used the brown garden snail Cornu aspersum from the family Helicidae. Therefore, the relationship between the acquisition of the mucus effect on the recipient and the evolution of the dart itself, and its mucus, is still open to debate. To test the commonality of the physiological effect of the dart mucus, we examined this in Euhadra peliomphala, a species from the Bradybaenidae family, and compared our findings with the results of previous work using C. aspersum. Our experiments showed that in E. peliomphala, the dart mucus had a physiological effect and lowered the accessibility of the gametolytic organ, as found in C. aspersum. This indicates that in various dart-bearing species the mucus from the dart glands targets the same organ and that the inhibition of sperm digestion has played a crucial role in the evolution of the dart and its mucus.

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“…Natural selection of Darwin that sexual selection has been involved as the form of selection favoring a wide range of traits in males, but we now know that it is also at work in hermaphrodites Anthes 2010;Leonard 2006). However, whether sexual selection has promoted the evolution of cognitive abilities has been rarely investigated.…”

Section: Selective Pressures For Social Recognition In Annelidsmentioning

confidence: 96%

“…This is not the only measure they take to estimate the quality of their partners. They also adjust the amount of donated sperm to the body size of their partner (prudent mating effort, Wedell et al 2002;Anthes 2010). Large redworms usually have higher fecundity and receive twice the amount of ejaculate than small redworms (Velando et al 2008).…”

Section: Mate Choice Is a Component Of Social Recognitionmentioning

confidence: 99%

Social Recognition in Annelids and the Evolution of Social Recognition and Cognitive Abilities by Sexual Selection

Lorenzi

Meconcelli

Sella

2015

Social Recognition in Invertebrates

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Social recognition has rarely received attention in the studies on annelids. This is not surprising since the biology of behavioral interactions in annelids is mostly unexplored. Only few pheromones have been identified, which function as cues in mate recognition and gamete release. Many annelids use chemical and visual cues to locate partners and classify them according to mating status, body size, or oocyte ripeness. In some hermaphroditic polychaete worms and leeches the ability to recognize the quality of potential partners seem to be very refined, especially in relation to the ability to assess the number of competitors over mating. These examples suggest that sexual selection might have favored individual ability to assess conspecific numerosity accurately and vary their male and female resource allocation (sex allocation) accordingly. Finally, annelids can estimate whether they are related to their potential partners and whether they belong to the same or a different population, which again result in adjustments of their reproductive allocation. We suggest that sexual selection is likely to be responsible for the evolution of the ability to assess mate quality and social group size because sex allocation adjustments are favored by sexual selection.

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Mate choice and reproductive conflict in simultaneous hermaphrodites

Cited by 47 publications

References 130 publications

Sex allocation and investment into pre- and post-copulatory traits in simultaneous hermaphrodites: the role of polyandry and local sperm competition

Sex allocation and investment into pre- and post-copulatory traits in simultaneous hermaphrodites: the role of polyandry and local sperm competition

Common effect of the mucus transferred during mating in two dart-shooting snail species from different families

Social Recognition in Annelids and the Evolution of Social Recognition and Cognitive Abilities by Sexual Selection

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