scholarly journals Evolution of deceit by worthless donations in a nuptial gift-giving spider

2014 ◽  
Vol 60 (1) ◽  
pp. 43-51 ◽  
Author(s):  
Paolo Giovanni Ghislandi ◽  
Maria J. Albo ◽  
Cristina Tuni ◽  
Trine Bilde
Keyword(s):  
Sperm Competition ◽  
Mating Success ◽  
Prey Capture ◽  
Sperm Transfer ◽  
Nuptial Gift ◽  
Gift Giving ◽  
Sexual Competition ◽  
Alternative Mating Strategy ◽  
Foraging Preferences ◽  
The Gift

Abstract Males of the nursery web spider Pisaura mirabilis usually offer an insect prey wrapped in white silk as a nuptial gift to facilitate copulation. Males exploit female foraging preferences in a sexual context as females feed on the gift during copulation. It is possible for males to copulate without a gift, however strong female preference for the gift leads to dramatically higher mating success for gift-giving males. Females are polyandrous, and gift-giving males achieve higher mating success, longer copulations, and increased sperm transfer that confer advantages in sperm competition. Intriguingly, field studies show that approximately one third of males carry a worthless gift consisting of dry and empty insect exoskeletons or plant fragments wrapped in white silk. Silk wrapping disguises gift content and females are able to disclose gift content only after accepting and feeding on the gift, meanwhile males succeed in transferring sperm. The evolution of deceit by worthless gift donation may be favoured by strong intra-sexual competition and costs of gift-construction including prey capture, lost foraging opportunities and investment in silk wrapping. Females that receive empty worthless gifts terminate copulation sooner, which reduces sperm transfer and likely disadvantages males in sperm competition. The gift-giving trait may thus become a target of sexually antagonistic co-evolution, where deceit by worthless gifts leads to female resistance to the trait. We discuss factors such as female mating rate and intensity of sperm competition that may shape the evolution of male deception, and how ecological factors may influence the evolution and maintenance of worthless gifts as an evolutionarily stable alternative mating strategy by frequency dependent selection.

scholarly journals Condition-dependent differences in male vibratory pre-copulatory and copulatory courtship in a nuptial gift-giving spider

2020 ◽  
Vol 74 (11) ◽  
Author(s):  
Monika J. B. Eberhard ◽  
Alexandra Machnis ◽  
Gabriele Uhl
Keyword(s):  
Mate Choice ◽  
Female Mate Choice ◽  
Vibrational Communication ◽  
Nuptial Gift ◽  
Gift Giving ◽  
Nuptial Gifts ◽  
Male Condition ◽  
Vibrational Signals ◽  
Copulatory Courtship ◽  
The Gift

Abstract Condition-dependent secondary sexual traits and signals are often crucial for mate choice decisions. Nuptial gifts, provided by the male to the female during mating, may represent an indicator of male condition, especially if production of the gift is energetically costly. Additionally, other signalling modalities may well play a role in mate choice in such systems. Females of the nursery web spider Pisaura mirabilis preferably mate with males that provide a prey item wrapped in silk. Apart from the nuptial gift, vibrational signals employed during courtship and mating may reveal additional information about male condition. We tested condition-dependence of male vibrational signals of well-fed versus starved males, when in contact with female dragline silk and during mating trials. Our results show that vibrational signals are produced in P. mirabilis, both during pre-copulatory courtship and during copulation. Male courtship signals were condition-dependent: males in good condition initiated signalling earlier and emitted more vibrational pulses than poor-condition males. They were also more likely to be accepted by the female for copulation. We additionally identified vibrational signals during copulation. These signals were different from pre-copulatory courtship vibrations but did not differ between the treatment groups. This study shows that vibrational communication plays an important role before and during copulation in P. mirabilis. It sets the stage for further experiments on spider biotremology associated with nuptial gift giving behaviour. Significance statement Male courtship behaviour can indicate a male’s condition and quality and be subject to female mate choice. Vibrational communication during mating plays a crucial role in many animal species. Spiders are known to be extremely sensitive towards vibrations, and there is evidence that vibratory signals are also used during courtship. Here, we study the nuptial gift-giving spider Pisaura mirabilis in which courtship entails providing a nuptial gift by the male to the female. The gift quality determines on the probability and duration of mating. We investigated the role of vibrational behaviour in this species by standardizing nuptial gifts. Our study demonstrates that vibratory signals comprise information about the male’s condition, that signals are also produced during mating and that courtship and copulatory signals are strikingly different. We suggest that vibrational communication provides important condition-dependent traits for female mate choice in addition to the nuptial gift.

scholarly journals Sperm storage mediated by cryptic female choice for nuptial gifts

2013 ◽  
Vol 280 (1772) ◽  
pp. 20131735 ◽  
Author(s):  
Maria J. Albo ◽  
Trine Bilde ◽  
Gabriele Uhl
Keyword(s):  
Hatching Success ◽  
Sperm Storage ◽  
Copulation Duration ◽  
Nuptial Gift ◽  
Gift Giving ◽  
Nuptial Gifts ◽  
Egg Hatching ◽  
Different Types ◽  
The Gift ◽  
Pisaura Mirabilis

Polyandrous females are expected to discriminate among males through postcopulatory cryptic mate choice. Yet, there is surprisingly little unequivocal evidence for female-mediated cryptic sperm choice. In species in which nuptial gifts facilitate mating, females may gain indirect benefits through preferential storage of sperm from gift-giving males if the gift signals male quality. We tested this hypothesis in the spider Pisaura mirabilis by quantifying the number of sperm stored in response to copulation with males with or without a nuptial gift, while experimentally controlling copulation duration. We further assessed the effect of gift presence and copulation duration on egg-hatching success in matings with uninterrupted copulations with gift-giving males. We show that females mated to gift-giving males stored more sperm and experienced 17% higher egg-hatching success, compared with those mated to no-gift males, despite matched copulation durations. Uninterrupted copulations resulted in both increased sperm storage and egg-hatching success. Our study confirms the prediction that the nuptial gift as a male signal is under positive sexual selection by females through cryptic sperm storage. In addition, the gift facilitates longer copulations and increased sperm transfer providing two different types of advantage to gift-giving in males.

scholarly journals Death feigning in the face of sexual cannibalism

2005 ◽  
Vol 2 (1) ◽  
pp. 23-25 ◽  
Author(s):  
Trine Bilde ◽  
Cristina Tuni ◽  
Rehab Elsayed ◽  
Stano Pekár ◽  
Søren Toft
Keyword(s):  
Reproductive Success ◽  
Male Reproductive Success ◽  
Male Mating ◽  
Sexual Cannibalism ◽  
Nuptial Gift ◽  
Gift Giving ◽  
Death Feigning ◽  
The Gift ◽  
The Face ◽  
Pisaura Mirabilis

Pre-copulatory sexual cannibalism by females affects male and female reproductive success in profoundly different ways, with the females benefiting from a meal and the male facing the risk of not reproducing at all. This sexual conflict predicts evolution of traits to avoid cannibalism and ensure male reproductive success. We show that males of the nuptial gift-giving spider Pisaura mirabilis display a remarkable death feigning behaviour—thanatosis—as part of the courtship prior to mating with potentially cannibalistic females. Thanatosis is a widespread anti-predator strategy; however, it is exceptional in the context of sexual selection. When the female approached a gift-displaying male, she usually showed interest in the gift but would sometimes attack the male, and at this potentially dangerous moment the male could ‘drop dead’. When entering thanatosis, the male would collapse and remain completely motionless while retaining hold of the gift so it was held simultaneously by both mates. When the female initiated consumption of the gift, the male cautiously ‘came to life’ and initiated copulation. Death feigning males were more successful in gaining copulations, but did not have prolonged copulations. We propose that death feigning evolved as an adaptive male mating strategy in conjunction with nuptial gift giving under the risk of being victimized by females.

"‘A Peculiar Gift of Providence": The Power-Imbalance Caused by Gift-Giving in Millenium Hall

2015 ◽  
Vol 2 (1) ◽  
Author(s):  
Elisia Snyder
Keyword(s):  
Eighteenth Century ◽  
Power Imbalance ◽  
Gift Giving ◽  
The Gift

Sarah Scott's eighteenth-century novel Millenium Hall canvasses the role of gift-giving in the dynamics heteronormative-domestic, economic, and spiritual relationships. The pharmakon of the gift plays a central role in Scott's understanding of philanthropy, and the construction of her female-inhabited, female-run utopia. This article's principle occupation is to show that all instances of gift-giving in Millenium Hall create power-imbalances between the superior giver and the inferior receiver; however, Sarah Scott's female utopia constructs the most preferable type of subservience.

scholarly journals A unique mating pattern of Panorpodes kuandianensis (Mecoptera: Panorpodidae)

2017 ◽  
Vol 86 (3) ◽  
pp. 229-237 ◽  
Author(s):  
Xin Tong ◽  
Lu Jiang ◽  
Bao-Zhen Hua
Keyword(s):  
Mating Behavior ◽  
Sexual Conflict ◽  
Sperm Transfer ◽  
Nuptial Gift ◽  
Mating Pattern ◽  
End To End ◽  
Mating Behaviors ◽  
First Time

Sexually reproductive insects exhibit diverse mating behaviors. However, the mating pattern remains unknown for Panorpodes of Panorpodidae to date. In this study, we investigated the mating behavior and copulatory mechanism of the short-faced scorpionfly Panorpodes kuandianensis Zhong, Zhang and Hua, 2011 for the first time. The results show that the male provides a salivary mass as a nuptial gift to the female and starts to copulate with the female in a V-shaped position, then changes to an end-to-end position by temporarily twisting the female abdominal segments VII−IX by 180°. During mating the basal processes and the basal teeth of the gonostyli and the hypandrium are used to obtain copulation and sustain the coupling of genitalia to secure successful sperm transfer. This unique mating pattern is greatly different from that of other Mecoptera reported and is likely evolved as an adaptation in the context of sexual conflict.

scholarly journals Functional morphology of immature mating in a widow spider

2021 ◽  
Vol 18 (1) ◽  
Author(s):  
Lenka Sentenská ◽  
Aileen Neumann ◽  
Yael Lubin ◽  
Gabriele Uhl
Keyword(s):  
Sperm Competition ◽  
Storage Conditions ◽  
Sperm Storage ◽  
Sperm Transfer ◽  
Costs And Benefits ◽  
Micro Computed Tomography ◽  
Mating Tactics ◽  
Adult Females ◽  
Storage Organs ◽  
Widow Spider

Abstract Background Mating generally occurs after individuals reach adulthood. In many arthropods including spiders, the adult stage is marked by a final moult after which the genitalia are fully developed and functional. In several widow spider species (genus Latrodectus), however, immature females may mate a few days before they moult to adulthood, i.e. in their late-subadult stage. While the “adult” mating typically results in cannibalism, males survive the “immature” mating. During both “immature” and “adult” matings, males leave parts of their paired copulatory organs within female genitalia, which may act as mating plugs. To study potential costs and benefits of the two mating tactics, we investigated female genital morphology of the brown widow spider, L. geometricus. Light microscopy, histology and micro-computed tomography of early-subadult, late-subadult and adult females were conducted to determine the overall pattern of genital maturation. We compared genitalia of mated late-subadult and adult females to reveal potential differences in the genitalic details that might indicate differential success in sperm transfer and different environments for sperm storage and sperm competition. Results We found that the paired sperm storage organs (spermathecae) and copulatory ducts are developed already in late-subadult females and host sperm after immature mating. However, the thickness of the spermathecal cuticle and the staining of the secretions inside differ significantly between the late-subadult and adult females. In late-subadult females mating plugs were found with higher probability in both spermathecae compared to adult females. Conclusions Sperm transfer in matings with late-subadult females follows the same route as in matings with adult females. The observed differences in the secretions inside the spermathecae of adult and late-subadult females likely reflect different storage conditions for the transferred sperm which may lead to a disadvantage under sperm competition if the subadult female later re-mates with another male. However, since males mating with late-subadult females typically transfer sperm to both spermathecae they might benefit from numerical sperm competition as well as from monopolizing access to the female sperm storage organs. The assessment of re-mating probability and relative paternity will clarify the costs and benefits of the two mating tactics in light of these findings.

Rembrandt, Vermeer, and the Gift in Seventeenth-Century Dutch Art

2021 ◽  
Author(s):  
Michael Zell
Keyword(s):  
Social Networks ◽  
Seventeenth Century ◽  
Early Modern ◽  
Gift Exchange ◽  
Gift Giving ◽  
Dutch Art ◽  
Dutch Golden Age ◽  
Symbolic Economy ◽  
The Gift ◽  
New Perspective

This book offers a new perspective on the art of the Dutch Golden Age by exploring the interaction between the gift's symbolic economy of reciprocity and obligation and the artistic culture of early modern Holland. Gifts of art were pervasive in seventeenth-century Europe and many Dutch artists, like their counterparts elsewhere, embraced gift giving to cultivate relations with patrons, art lovers, and other members of their social networks. Rembrandt also created distinctive works to function within a context of gift exchange, and both Rembrandt and Vermeer engaged the ethics of the gift to identify their creative labor as motivated by what contemporaries called a love of art

Male mate choice favors more colorful females in the gift-giving cabbage butterfly

2014 ◽  
Vol 68 (9) ◽  
pp. 1539-1547 ◽  
Author(s):  
Natasha Tigreros ◽  
Monica A. Mowery ◽  
Sara M. Lewis
Keyword(s):  
Mate Choice ◽  
Male Mate Choice ◽  
Gift Giving ◽  
Cabbage Butterfly ◽  
The Gift ◽  
Male Mate
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