Combinative stimulation inactivates sex pheromone production in the silkworm moth,Bombyx mori

Karube, Fuyuki; Kobayashi, Masahiko

doi:10.1002/(sici)1520-6327(199910)42:2<111::aid-arch1>3.0.co;2-n

Cited by 8 publications

(6 citation statements)

References 18 publications

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“…Within the reproductive tract of female Drosophila , the presence of sperm stimulates the nervous system and the regulation of genes which induce changes within the female in preparation for oviposition, and reduces female receptivity (Heifetz and Wolfner, ; McGraw et al, ). Females of some moth species, only become unreceptive if their spermatheca are full of sperm (Giebultowicz et al, ; Karube and Kobayashi, ) which is activated by innervated stretch receptors in bursa copulatrix (Sugawara, ) and/or of the setae (Lum and Arbogast, ; reviewed in Wedell, ). Matings without sperm transfer also increase female remating in spiders and fruit flies (Aisenberg and Costa, ), respectively (Kraaijeveld and Chapman, ).…”

Section: Discussionmentioning

confidence: 99%

Females remate more frequently when mated with sperm‐deficient males

2014

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Polyandry is a source of sexual conflict and males often try to limit female promiscuity. Consequently, male manipulation of receptivity via antiaphrodisiacs and copulatory plugs that prevent female remating can be a source of sexual conflict. This sexual conflict may be intensified when females must remate for fertility insurance. Male red-sided garter snakes produce a large, gelatinous copulatory plug that has been proposed to 1) physically prevent remating and 2) contain an antiaphrodisiac that reduces female receptivity. These males may become sperm depleted because of their dissociated reproductive pattern. If a female mates with a sperm deficient male and is also rendered unreceptive to further mating, then this represents a serious conflict. We tested whether female remating frequency is affected when females are mated with a male that produces a sperm-less copulatory plug. We show that females are significantly more likely to remate after mating with vasectomized males than intact males, even though vasectomized males still produce a copulatory plug. These results suggest that the ejaculate material of the plug does not contain an antiaphrodisiac. Instead, females may use sperm as a cue for post-copulatory mate assessment and seek to remate for the direct benefit of fertility insurance if they have mated with sperm-depleted males.

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Section: Discussionmentioning

confidence: 99%

Females remate more frequently when mated with sperm‐deficient males

2014

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“…For example, many species of moth require a combination of substances that are transferred in the ejaculate, in addition to a neural or mechanical stimulation of mating, to cease pheromone production (Wedell, 2005). In the silk moth, Bombyx mori , mechanical stimulation of the tip of the abdomen during copulation, in combination with successful receipt of sperm, are both required to trigger a neural inactivation process that suppresses production of the sex pheromone (Karube & Kobayashi, 1999).…”

Section: Factors Influencing Female Pheromone Changementioning

confidence: 99%

Detection of female mating status using chemical signals and cues

2010

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Males of many species choose their mate according to the female's reproductive status, and there is now increasing evidence that male fitness can depend on this discrimination. However, females will also aim to regulate their mating activity so as to maximize their own fitness. As such, both sexes may attempt to dictate the frequency and timing of female mating, reflecting the potentially different costs of female signaling to both sexes. Here, I review evidence that chemical cues and signals are used widely by males to discriminate between mated and unmated females, and explore the mechanisms by which female odour changes post-mating. There is substantial empirical evidence that mated and unmated females differ in their chemical profile, and that this variation provides males with information on a female's mating status. Although there appears to be large variation among species regarding the mechanisms by which female odour is altered post-mating, the transfer of male substances to females during or subsequent to copulation appear to play a major role. This transfer of substances by males may be part of their strategy to suppress reproduction by competing males, particularly in species where females mate more than once.

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“…In many lepidopteran species the presence of sperm in the spermatheca (female sperm storage organ) is required to switch off female receptivity and stimulate oviposition (e.g. gypsy moths, Giebultowicz et al, 1991; silk moths, Karube and Kobayashi, 1999). Both the spermatheca and the bursa copulatrix are innervated, indicating that sperm may play a role in switching off female receptivity and stimulating oviposition (Sugawara, 1979;Kingan et al, 1995).…”

Section: Spermmentioning

confidence: 99%

“…Males transferring a spermatophore without accessory gland products do not stop female pheromone production but do stop the calling behaviour (Kingan et al, 1993). In the silk moth, Bombyx mori, a combination of both mechanical stimulation of the tip of the abdomen, which takes place during copulation, together with successful receipt of sperm, trigger a neural inactivation process that suppresses production of the female sex pheromone bombykol (Karube and Kobayashi, 1999). It seems that mechanical receptors at the tip of the abdomen inhibit the release of PBAN (Ichikawa, 1998), whereas there is no evidence that any further humoral factors transferred at mating are involved.…”

Section: Seminal Fluidsmentioning

confidence: 99%

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Female receptivity in butterflies and moths

Wedell

2005

Journal of Experimental Biology

136

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SUMMARY Female receptivity in butterflies and moths is influenced by a multitude of factors that vary between virgin and mated females, and is often affected by the quality and persistence of courting males. Mated females of polyandrous species frequently display a period of non-receptivity following mating, often resulting from factors transferred by the male at mating. Some of these compounds have a transient effect (e.g. anti-aphrodisiacs and mating plugs),whereas others induce long-term suppression of receptivity (i.e. sperm and seminal factors). Sperm appear to generally induce long-term suppression of female receptivity in both butterflies and moths. In some species, production of non-fertile sperm may function to fill the female's sperm storage organ and switch off receptivity, although whether this is a general phenomenon across the Lepidoptera has not yet been examined. Examination of seminal fluids suppressing female receptivity in moths suggests that more than one factor is implicated, but frequently the transfer or stimulation of Juvenile Hormone production is involved. Surprisingly, potential seminal factors influencing female receptivity in butterflies remain largely unexplored. In this review, I summarize the various factors that are known to affect female receptivity in the Lepidoptera to date, and briefly compare the function and similarity of the Pheromone Suppressing Peptide (HezPSP) in moths to that of the Sex Peptide in Drosophila melanogaster (DrmSP). The exciting possibility that seminal peptides in the Lepidoptera and Diptera (e.g. Drosophila melanogaster) may have shared functionality is discussed.

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Combinative stimulation inactivates sex pheromone production in the silkworm moth,Bombyx mori

Cited by 8 publications

References 18 publications

Females remate more frequently when mated with sperm‐deficient males

Females remate more frequently when mated with sperm‐deficient males

Detection of female mating status using chemical signals and cues

Female receptivity in butterflies and moths

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