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Costs and benefits of giant sperm and sperm storage organs in Drosophila melanogaster

Zajitschek, S, Zajitschek, F, Josway, S, Al Shabeeb, R, Weiner, H and Manier, MK (2019) Costs and benefits of giant sperm and sperm storage organs in Drosophila melanogaster. Journal of Evolutionary Biology, 32 (11). pp. 1300-1309. ISSN 1010-061X

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Abstract

In Drosophila, long sperm are favoured in sperm competition based on the length of the female's primary sperm storage organ, the seminal receptacle (SR). This sperm–SR interaction, together with a genetic correlation between the traits, suggests that the coevolution of exaggerated sperm and SR lengths may be driven by Fisherian runaway selection. Here, we explore the costs and benefits of long sperm and SR genotypes, both in the sex that carries them and in the sex that does not. We meas‐ured male and female fitness in inbred lines of Drosophila melanogaster derived from four populations previously selected for long sperm, short sperm, long SRs or short SRs. We specifically asked: What are the costs and benefits of long sperm in males and long SRs in females? Furthermore, do genotypes that generate long sperm in males or long SRs in females impose a fitness cost on the opposite sex? Answers to these questions will address whether long sperm are an honest indicator of male fit‐ness, male post‐copulatory success is associated with male precopulatory success, female choice benefits females or is costly, and intragenomic conflict could influence evolution of these traits. We found that both sexes have increased longevity in long sperm and long SR genotypes. Males, but not females, from long SR lines had higher fecundity. Our results suggest that sperm–SR coevolution is facilitated by both in‐creased viability and indirect benefits of long sperm and SRs in both sexes.

Item Type: Article
Additional Information: This is the peer reviewed version of the following article:Costs and benefits of giant sperm and sperm storage organs in Drosophila melanogaster,which has been published in final form at https://dx.doi.org/10.1111/jeb.13529. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
Uncontrolled Keywords: 0602 Ecology, 0603 Evolutionary Biology, 0608 Zoology
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Q Science > QH Natural history > QH301 Biology
Divisions: Biological & Environmental Sciences (new Sep 19)
Publisher: Wiley
Related URLs:
Date Deposited: 24 May 2021 08:19
Last Modified: 24 May 2021 08:19
DOI or Identification number: 10.1111/jeb.13529
URI: https://researchonline.ljmu.ac.uk/id/eprint/15031

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