Reproductive strategies in hermaphroditic gastropods: conceptual and empirical approaches

Nakadera, Yumi; Koene, Joris M.

doi:10.1139/cjz-2012-0272

Cited by 42 publications

(32 citation statements)

References 160 publications

(331 reference statements)

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“…For example, many simultaneous hermaphrodites possess specific organs to digest sperm and/or other ejaculate components (reviewed in Baur 1998;Michiels 1998;Nakadera and Koene 2013) and so direct (nongenetic) benefits from mating in the female role could potentially result from ejaculate digestion, which might generate a female sex-role preference. However, to our knowledge, evidence that the digestion of ejaculates is actually energetically beneficial to the recipient is still lacking (see Postmating Conflicts sections below).…”

Section: Sexual Conflict In Hermaphroditesmentioning

confidence: 99%

Sexual Conflict in Hermaphrodites

Schärer¹,

Janicke²,

Ramm³

2014

Cold Spring Harb Perspect Biol

100

136

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Hermaphrodites combine the male and female sex functions into a single individual, either sequentially or simultaneously. This simple fact means that they exhibit both similarities and differences in the way in which they experience, and respond to, sexual conflict compared to separate-sexed organisms. Here, we focus on clarifying how sexual conflict concepts can be adapted to apply to all anisogamous sexual systems and review unique (or especially important) aspects of sexual conflict in hermaphroditic animals. These include conflicts over the timing of sex change in sequential hermaphrodites, and in simultaneous hermaphrodites, over both sex roles and the postmating manipulation of the sperm recipient by the sperm donor. Extending and applying sexual conflict thinking to hermaphrodites can identify general evolutionary principles and help explain some of the unique reproductive diversity found among animals exhibiting this widespread but to date understudied sexual system.

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Section: Sexual Conflict In Hermaphroditesmentioning

confidence: 99%

Sexual Conflict in Hermaphrodites

Schärer¹,

Janicke²,

Ramm³

2014

Cold Spring Harb Perspect Biol

100

136

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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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“…The sexually reproducing ones practice two reproductive strategies: male and female (e.g., Nakadera & Koene, 2013). Males and females of gonochoric species compete for mates, using various methods in order to find an adequate partner and produce the Strongest and healthiest offspring possible (survival of parental lineage).…”

Section: Introductionmentioning

confidence: 99%

Selfing and brooding in Alinda biplicata (Gastropoda: Pulmonata: Clausiliidae) – life history traits of a good coloniser

Maltz¹,

Sulikowska-Drozd

2014

Animal Biol

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Alinda biplicata is capable of uniparental reproduction (selfing). The snails need 18 to 24 weeks to reach their ultimate size, and the first reproduction takes place 26 to 39 weeks after shell growth completion. Besides giving birth to juveniles, which is typical of A. biplicata (39% of litters), the uniparentally reproducing individuals laid egg batches (38%) as well as mixed batches (eggs and juveniles; 23%). Within a few days the eggs decomposed, and in mixed batches they were often consumed by the accompanying neonates. In the next season, 70% of the remaining 20 snails reproduced (all of which had reproduced in the previous season). In the first season the neonate:egg proportion was 54:46, in the second 74:26. The egg-laying should be regarded as an anomaly -getting rid of eggs which were not fertilised or in which embryos died at early cleavage stages. The combination of selñng and brooding may explain the wide distribution and wide range of habitats occupied by A. biplicata.

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Reproductive strategies in hermaphroditic gastropods: conceptual and empirical approaches

Cited by 42 publications

References 160 publications

Sexual Conflict in Hermaphrodites

Sexual Conflict in Hermaphrodites

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

Selfing and brooding in Alinda biplicata (Gastropoda: Pulmonata: Clausiliidae) – life history traits of a good coloniser

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