Male sexual ornament size is positively associated with reproductive morphology and enhanced fertility in the stalk-eyed fly Teleopsis dalmanni.

BMC Evolutionary Biology
David W RogersAndrew Pomiankowski

Abstract

Exaggerated male ornaments and displays often evolve in species where males only provide females with ejaculates during reproduction. Although "good genes" arguments are typically invoked to explain this phenomenon, a simpler alternative is possible if variation in male reproductive quality (e.g. sperm number, ejaculate content, mating rate) is an important determinant of female reproductive success. The "phenotype-linked fertility hypothesis" states that female preference for male ornaments or displays has been selected to ensure higher levels of fertility and has driven the evolution of exaggerated male traits. Females of the stalk-eyed fly Teleopsis dalmanni must mate frequently to maintain high levels of fertility and prefer to mate with males exhibiting large eyespan, a condition-dependent sexual ornament. If eyespan indicates male reproductive quality, females could directly increase their reproductive success by mating with males with large eyespan. Here we investigate whether male eyespan indicates accessory gland and testis length, and then ask whether mating with large eyespan males affects female fertility. Male eyespan was a better predictor of two key male reproductive traits--accessory gland and testis length--tha...Continue Reading

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Citations

Jun 19, 2009·Proceedings. Biological Sciences·Joachim RutherSven Steiner
Apr 27, 2012·Proceedings. Biological Sciences·A South, S M Lewis
Mar 15, 2012·BMC Evolutionary Biology·Zhen ZhuJae Chun Choe
Oct 9, 2014·Journal of Evolutionary Biology·S P FlanaganA G Jones
Dec 12, 2012·The Journal of Animal Ecology·Rémi ChargéGabriele Sorci
Jun 22, 2013·Ecology and Evolution·Elisabeth HarleyKevin Fowler
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Sep 5, 2019·Proceedings. Biological Sciences·Sam Ronan FinneganAndrew Pomiankowski
Jan 8, 2013·Evolution; International Journal of Organic Evolution·Geoff A ParkerLeigh W Simmons
Sep 15, 2017·Ecology and Evolution·Nadine C ChapmanAndrew Pomiankowski
May 28, 2019·Journal of Evolutionary Biology·James Malcolm HowieKevin Fowler
Mar 26, 2016·General and Comparative Endocrinology·Armando Márquez-GarcíaJorge Contreras-Garduño
Feb 10, 2021·Journal of Evolutionary Biology·Sam Ronan FinneganAndrew Pomiankowski

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Methods Mentioned

BETA
environmental stress
dissection

Software Mentioned

JMP
NIH Image

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