Predation shapes sperm performance surfaces in guppies

Alessandro Devigili, Jonathan P. Evans, John L. Fitzpatrick

Research output: Contribution to journalArticle

Abstract

Sperm velocity is a key determinant of competitive fertilization success in many species. Selection is therefore expected to favour the evolution of faster sperm when the level of sperm competition is high. However, several aspects can determine the direction and strength of selection acting on this key performance trait, including ecological factors that influence both sperm competition and the strength of selection acting on correlated traits that may constrain evolutionary responses in sperm velocity. Here, we determine how a key ecological variable, the level of predation, shapes sperm swimming speed across 18 Trinidadian populations of guppies (Poecilia reticulata). We use performance analysis, a statistical tool akin to the familiar methods of multivariate selection analyses, to determine how the level of predation influences sperm velocity (modelled as a performance trait) when accounting for correlated pre- and postcopulatory traits that are also impacted by predation. We show that predation affects the combination of pre- and postcopulatory traits that ultimately predict sperm performance. Overall, we report evidence for disruptive relationships between sperm performance and combinations of ornaments and sperm morphology, but the specific combinations of traits that predict sperm velocity depended on the level of predation. These analyses underscore the complex nonlinear interrelationships among pre- and postcopulatory traits and the importance of considering ecological factors that may ultimately change the way in which multiple traits interact to determine a trait's performance value. As such, our results are likely to be broadly applicable across systems where selection is influenced by ecological conditions.

Original languageEnglish
Article number20190869
JournalProceedings of the Royal Society B: Biological Sciences
Volume286
Issue number1905
DOIs
Publication statusPublished - 26 Jun 2019

Fingerprint

Poecilia
Poecilia reticulata
sperm
Spermatozoa
predation
spermatozoa
sperm competition
fertilization (reproduction)
Fertilization
statistical analysis
Multivariate Analysis

Cite this

@article{029d8c8b0acf4da3b8377d5da1643676,
title = "Predation shapes sperm performance surfaces in guppies",
abstract = "Sperm velocity is a key determinant of competitive fertilization success in many species. Selection is therefore expected to favour the evolution of faster sperm when the level of sperm competition is high. However, several aspects can determine the direction and strength of selection acting on this key performance trait, including ecological factors that influence both sperm competition and the strength of selection acting on correlated traits that may constrain evolutionary responses in sperm velocity. Here, we determine how a key ecological variable, the level of predation, shapes sperm swimming speed across 18 Trinidadian populations of guppies (Poecilia reticulata). We use performance analysis, a statistical tool akin to the familiar methods of multivariate selection analyses, to determine how the level of predation influences sperm velocity (modelled as a performance trait) when accounting for correlated pre- and postcopulatory traits that are also impacted by predation. We show that predation affects the combination of pre- and postcopulatory traits that ultimately predict sperm performance. Overall, we report evidence for disruptive relationships between sperm performance and combinations of ornaments and sperm morphology, but the specific combinations of traits that predict sperm velocity depended on the level of predation. These analyses underscore the complex nonlinear interrelationships among pre- and postcopulatory traits and the importance of considering ecological factors that may ultimately change the way in which multiple traits interact to determine a trait's performance value. As such, our results are likely to be broadly applicable across systems where selection is influenced by ecological conditions.",
keywords = "Ejaculate quality, Multivariate selection analyses, Postcopulatory sexual selection, Trade-off",
author = "Alessandro Devigili and Evans, {Jonathan P.} and Fitzpatrick, {John L.}",
year = "2019",
month = "6",
day = "26",
doi = "10.1098/rspb.2019.0869",
language = "English",
volume = "286",
journal = "Proceedings of the Royal Society of London: series B",
issn = "0962-8452",
publisher = "ROYAL SOCIETY",
number = "1905",

}

Predation shapes sperm performance surfaces in guppies. / Devigili, Alessandro; Evans, Jonathan P.; Fitzpatrick, John L.

In: Proceedings of the Royal Society B: Biological Sciences, Vol. 286, No. 1905, 20190869, 26.06.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Predation shapes sperm performance surfaces in guppies

AU - Devigili, Alessandro

AU - Evans, Jonathan P.

AU - Fitzpatrick, John L.

PY - 2019/6/26

Y1 - 2019/6/26

N2 - Sperm velocity is a key determinant of competitive fertilization success in many species. Selection is therefore expected to favour the evolution of faster sperm when the level of sperm competition is high. However, several aspects can determine the direction and strength of selection acting on this key performance trait, including ecological factors that influence both sperm competition and the strength of selection acting on correlated traits that may constrain evolutionary responses in sperm velocity. Here, we determine how a key ecological variable, the level of predation, shapes sperm swimming speed across 18 Trinidadian populations of guppies (Poecilia reticulata). We use performance analysis, a statistical tool akin to the familiar methods of multivariate selection analyses, to determine how the level of predation influences sperm velocity (modelled as a performance trait) when accounting for correlated pre- and postcopulatory traits that are also impacted by predation. We show that predation affects the combination of pre- and postcopulatory traits that ultimately predict sperm performance. Overall, we report evidence for disruptive relationships between sperm performance and combinations of ornaments and sperm morphology, but the specific combinations of traits that predict sperm velocity depended on the level of predation. These analyses underscore the complex nonlinear interrelationships among pre- and postcopulatory traits and the importance of considering ecological factors that may ultimately change the way in which multiple traits interact to determine a trait's performance value. As such, our results are likely to be broadly applicable across systems where selection is influenced by ecological conditions.

AB - Sperm velocity is a key determinant of competitive fertilization success in many species. Selection is therefore expected to favour the evolution of faster sperm when the level of sperm competition is high. However, several aspects can determine the direction and strength of selection acting on this key performance trait, including ecological factors that influence both sperm competition and the strength of selection acting on correlated traits that may constrain evolutionary responses in sperm velocity. Here, we determine how a key ecological variable, the level of predation, shapes sperm swimming speed across 18 Trinidadian populations of guppies (Poecilia reticulata). We use performance analysis, a statistical tool akin to the familiar methods of multivariate selection analyses, to determine how the level of predation influences sperm velocity (modelled as a performance trait) when accounting for correlated pre- and postcopulatory traits that are also impacted by predation. We show that predation affects the combination of pre- and postcopulatory traits that ultimately predict sperm performance. Overall, we report evidence for disruptive relationships between sperm performance and combinations of ornaments and sperm morphology, but the specific combinations of traits that predict sperm velocity depended on the level of predation. These analyses underscore the complex nonlinear interrelationships among pre- and postcopulatory traits and the importance of considering ecological factors that may ultimately change the way in which multiple traits interact to determine a trait's performance value. As such, our results are likely to be broadly applicable across systems where selection is influenced by ecological conditions.

KW - Ejaculate quality

KW - Multivariate selection analyses

KW - Postcopulatory sexual selection

KW - Trade-off

UR - http://www.scopus.com/inward/record.url?scp=85068375012&partnerID=8YFLogxK

U2 - 10.1098/rspb.2019.0869

DO - 10.1098/rspb.2019.0869

M3 - Article

VL - 286

JO - Proceedings of the Royal Society of London: series B

JF - Proceedings of the Royal Society of London: series B

SN - 0962-8452

IS - 1905

M1 - 20190869

ER -