Sperm Storage Mediated by Cryptic Female Choice for Nuptial Gifts
Overview
Authors
Affiliations
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.
A sexually transmitted sugar orchestrates reproductive responses to nutritional stress.
Kim S, Lee K, Park S, Yang T, Song I, Rai F Nat Commun. 2024; 15(1):8477.
PMID: 39353950 PMC: 11445483. DOI: 10.1038/s41467-024-52807-3.
Polyandry and sperm competition in two traumatically inseminating species of Strepsiptera (Insecta).
Jandausch K, Wanjura N, Escalona H, Sann M, Beutel R, Pohl H Sci Rep. 2024; 14(1):10447.
PMID: 38714726 PMC: 11076583. DOI: 10.1038/s41598-024-61109-z.
Intraspecific body size variation and allometry of genitalia in the orb-web spider-.
Dharmarathne C, McLean D, Herberstein M, Schneider J PeerJ. 2023; 11:e16413.
PMID: 38047024 PMC: 10691382. DOI: 10.7717/peerj.16413.
Paternity sharing in insects with female competition for nuptial gifts.
Browne J, Gwynne D Ecol Evol. 2022; 12(11):e9463.
PMID: 36329813 PMC: 9618826. DOI: 10.1002/ece3.9463.
Effects of reliance on stored sperm on reproduction in the sailfin molly Poecilia latipinna.
Hankison S, Gangloff E, Fry B, Arnold A, Lashway A, Betts J J Fish Biol. 2022; 101(6):1628-1633.
PMID: 36134581 PMC: 10091790. DOI: 10.1111/jfb.15228.