Sexual Conflict over Nuptial Gifts in Insects

Gwynne, Darryl

doi:10.1146/annurev.ento.53.103106.093423

Cited by 291 publications

(273 citation statements)

References 117 publications

Supporting

Mentioning

270

Contrasting

Unclassified

Order By: Relevance

“…In some species, nuptial gifts have a demonstrated nutritional benefit (Gwynne 2008); however, in others, such benefits are small or absent, with the main function of gifts instead being the transfer of male seminal products that can manipulate female behaviour (Vahed 2007a). There is no shortage of data on the phenotypic effects of gifts to answer question (ii) above (reviewed in Vahed 2007a;Gwynne 2008). However, there are as-yet surprisingly limited data on sex-specific selection on those shared traits influenced by gifts (question (i)).…”

Section: The Economy Of Conflictmentioning

confidence: 99%

The conditional economics of sexual conflict

et al. 2009

View full text Add to dashboard Cite

Sexual conflict is a fundamentally important aspect of male-female interactions. In this opinion piece, we emphasize two approaches that warrant significantly greater attention. First, we review the importance of understanding the 'economics' (costs and benefits) of sexual interactions and note surprisingly large, unrecognized gaps in our knowledge. Second, we highlight the novel obstacles and opportunities afforded by the dependence of sexually antagonistic (SA) selection on both the local environment and condition of the interacting individuals. We conclude that more research in these two areas is essential to fully understand the evolution of SA interactions and will provide significant new insights into the extent to which coevolution of the sexes is shaped by conflict. We argue that these approaches, although not new to the field, are undervalued and under-represented.

show abstract

Section: The Economy Of Conflictmentioning

confidence: 99%

The conditional economics of sexual conflict

et al. 2009

View full text Add to dashboard Cite

show abstract

“…These 'nuptial gifts' vary from energy supplies to glandular products that increase longevity. 13 Similarly, simply making C. elegans sterile (by removing the differentiated gametes alone, for instance) does not make them live longer. It is only upon elimination of germline-stem cells (GSCs), a population of totipotent proliferative cells that give rise to the entire adult germline, that lifespan is extended.…”

Section: Introductionmentioning

confidence: 99%

Nuclear hormone receptors as mediators of metabolic adaptability following reproductive perturbations

Ratnappan

Ward

Ghazi

2016

Worm

View full text Add to dashboard Cite

Previously, we identified a group of nuclear hormone receptors (NHRs) that promote longevity in the nematode Caenorhabditis elegans following germline-stem cell (GSC) loss. This group included NHR-49, the worm protein that performs functions similar to vertebrate PPARa, a key regulator of lipid metabolism. We showed that NHR-49/PPARa enhances mitochondrial b-oxidation and fatty acid desaturation upon germline removal, and through the coordinated enhancement of these processes allows the animal to retain lipid homeostasis and undergo lifespan extension. NHR-49/ PPARa expression is elevated in GSC-ablated animals, in part, by DAF-16/FOXO3A and TCER-1/ TCERG1, two other conserved, pro-longevity transcriptional regulators that are essential for germline-less longevity. In exploring the roles of the other pro-longevity NHRs, we discovered that one of them, NHR-71/HNF4, physically interacted with NHR-49/PPARa. NHR-71/HNF4 did not have a broad impact on the expression of b-oxidation and desaturation targets of NHR-49/PPARa. But, both NHR-49/PPARa and NHR-71/HNF4 were essential for the increased expression of DAF-16/ FOXO3A-and TCER-1/TCERG1-downstream target genes. In addition, nhr-49 inactivation caused a striking membrane localization of KRI-1, the only known common upstream regulator of DAF-16/ FOXO3A and TCER-1/TCERG1, suggesting that it may operate in a positive feedback loop to potentiate the activity of this pathway. These data underscore how selective interactions between NHRs that function as nodes in metabolic networks, confer functional specificity in response to different physiological stimuli.

show abstract

“…For example, seminal fluid proteins in Drosophila melanogaster are known to increase egg production (Soller et al, 1999), mediate ovulation and oviposition (Heifetz et al, 2000;Taylor et al, 2008), and elevate sperm storage and utilization (Tram and Wolfner, 1999). Additionally, essential nutrients in the ejaculate such as salts, sugars and lipids may act to increase overall female fitness (Boggs, 1990;Gwynne, 2008;Ursprung et al, 2009;Vahed, 1998). If substances comprising the ejaculate significantly increase reproductive output, then females might copulate more frequently to gain access to these fitness-enhancing compounds.…”

Section: Introductionmentioning

confidence: 99%

Mating for male-derived prostaglandin: a functional explanation for the increased fecundity of mated female crickets?

Worthington

Jurenka

Kelly

2015

Journal of Experimental Biology

View full text Add to dashboard Cite

Direct benefits are considered to be the driving force of high female mating rates, yet species in which females do not receive material resources from males still experience increased fitness from mating frequently. One hypothesis suggests that substances within the ejaculate may boost survival or offspring production. If these materials are limiting to females, they will require continual renewal via mating and could provide a functional understanding of how high mating rates lead to increased female fitness. Using the Texas field cricket, Gryllus texensis, we investigated the sexual transfer of prostaglandin E 2 , an important mediator of invertebrate reproduction. We determined that like other gryllid species, males include significant quantities of prostaglandin E 2 (PGE 2 ) and its precursor molecule, arachidonic acid (AA), within the spermatophore. These components are passed to females during copulation and then stored within the spermatheca. We then tested the novel hypothesis that PGE 2 is ephemerally available after mating and that females must frequently mate to maintain access to this limiting compound. We found that PGE 2 within the spermatheca is indeed depleted through time, with only a small amount remaining 1 week after mating, but that its presence can be maintained at high quantities and for prolonged periods of time by remating. Our results support the hypothesis that high female mating rates increase the amount and availability of PGE 2 throughout the breeding season, which could explain the positive relationship between female mating rate and fecundity.

show abstract

Sexual Conflict over Nuptial Gifts in Insects

Cited by 291 publications

References 117 publications

The conditional economics of sexual conflict

The conditional economics of sexual conflict

Nuclear hormone receptors as mediators of metabolic adaptability following reproductive perturbations

Mating for male-derived prostaglandin: a functional explanation for the increased fecundity of mated female crickets?

Contact Info

Product

Resources

About