Local mate competition with lethal male combat: Effects of competitive asymmetry and information availability on a sex ratio game

Jun Abe, Yoshitaka Kamimura, H. Ito, H. Matsuda, M. Shimada

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

We constructed a sex allocation model for local mate competition considering the asymmetry of competitive abilities among sons. This model assumes two females of a parasitoid wasp oviposit on the same host in sequential order. The evolutionarily stable strategy will be in either Stackelberg or Nash equilibrium, depending on whether the females can recognize their opponent's sex ratio or not, respectively. The Nash equilibrium predicts the second female produce more males than the first. If the second female is able to know and respond to the strategy of the first (a Stackelberg equilibrium), the first will decide an optimal sex ratio assuming that the second reply to it. Under such an assumption, our model predicts that not producing sons is adaptive for the second female when the sons she produces have low competitive ability. Males of parasitoid wasps Melittobia spp. are engaged in lethal male-male combat, indicating large asymmetry in mating success among sons. If females have the ability to recognize their opponent's sex ratio, our model suggests that the severe lethal male-male combat may be one factor explaining their extremely female-biased sex ratio that is unexplainable by pre-existent models.

Original languageEnglish
Pages (from-to)607-613
Number of pages7
JournalJournal of Evolutionary Biology
Volume16
Issue number4
DOIs
Publication statusPublished - 2003 Jul
Externally publishedYes

Fingerprint

Sex Ratio
sex ratio
asymmetry
Wasps
competitive ability
wasp
parasitoid
Melittobia
evolutionarily stable strategy
sex allocation
mating success
effect

Keywords

  • Lethal male combat
  • Local mate competition
  • Melittobia
  • Nash equilibrium
  • Parasitoid wasp
  • Sex ratio
  • Stackelberg equilibrium

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Palaeontology
  • Genetics

Cite this

Local mate competition with lethal male combat : Effects of competitive asymmetry and information availability on a sex ratio game. / Abe, Jun; Kamimura, Yoshitaka; Ito, H.; Matsuda, H.; Shimada, M.

In: Journal of Evolutionary Biology, Vol. 16, No. 4, 07.2003, p. 607-613.

Research output: Contribution to journalArticle

@article{a6d983cd951b47e7a5c0901a6ac23ea7,
title = "Local mate competition with lethal male combat: Effects of competitive asymmetry and information availability on a sex ratio game",
abstract = "We constructed a sex allocation model for local mate competition considering the asymmetry of competitive abilities among sons. This model assumes two females of a parasitoid wasp oviposit on the same host in sequential order. The evolutionarily stable strategy will be in either Stackelberg or Nash equilibrium, depending on whether the females can recognize their opponent's sex ratio or not, respectively. The Nash equilibrium predicts the second female produce more males than the first. If the second female is able to know and respond to the strategy of the first (a Stackelberg equilibrium), the first will decide an optimal sex ratio assuming that the second reply to it. Under such an assumption, our model predicts that not producing sons is adaptive for the second female when the sons she produces have low competitive ability. Males of parasitoid wasps Melittobia spp. are engaged in lethal male-male combat, indicating large asymmetry in mating success among sons. If females have the ability to recognize their opponent's sex ratio, our model suggests that the severe lethal male-male combat may be one factor explaining their extremely female-biased sex ratio that is unexplainable by pre-existent models.",
keywords = "Lethal male combat, Local mate competition, Melittobia, Nash equilibrium, Parasitoid wasp, Sex ratio, Stackelberg equilibrium",
author = "Jun Abe and Yoshitaka Kamimura and H. Ito and H. Matsuda and M. Shimada",
year = "2003",
month = "7",
doi = "10.1046/j.1420-9101.2003.00558.x",
language = "English",
volume = "16",
pages = "607--613",
journal = "Journal of Evolutionary Biology",
issn = "1010-061X",
publisher = "Wiley-Blackwell",
number = "4",

}

TY - JOUR

T1 - Local mate competition with lethal male combat

T2 - Effects of competitive asymmetry and information availability on a sex ratio game

AU - Abe, Jun

AU - Kamimura, Yoshitaka

AU - Ito, H.

AU - Matsuda, H.

AU - Shimada, M.

PY - 2003/7

Y1 - 2003/7

N2 - We constructed a sex allocation model for local mate competition considering the asymmetry of competitive abilities among sons. This model assumes two females of a parasitoid wasp oviposit on the same host in sequential order. The evolutionarily stable strategy will be in either Stackelberg or Nash equilibrium, depending on whether the females can recognize their opponent's sex ratio or not, respectively. The Nash equilibrium predicts the second female produce more males than the first. If the second female is able to know and respond to the strategy of the first (a Stackelberg equilibrium), the first will decide an optimal sex ratio assuming that the second reply to it. Under such an assumption, our model predicts that not producing sons is adaptive for the second female when the sons she produces have low competitive ability. Males of parasitoid wasps Melittobia spp. are engaged in lethal male-male combat, indicating large asymmetry in mating success among sons. If females have the ability to recognize their opponent's sex ratio, our model suggests that the severe lethal male-male combat may be one factor explaining their extremely female-biased sex ratio that is unexplainable by pre-existent models.

AB - We constructed a sex allocation model for local mate competition considering the asymmetry of competitive abilities among sons. This model assumes two females of a parasitoid wasp oviposit on the same host in sequential order. The evolutionarily stable strategy will be in either Stackelberg or Nash equilibrium, depending on whether the females can recognize their opponent's sex ratio or not, respectively. The Nash equilibrium predicts the second female produce more males than the first. If the second female is able to know and respond to the strategy of the first (a Stackelberg equilibrium), the first will decide an optimal sex ratio assuming that the second reply to it. Under such an assumption, our model predicts that not producing sons is adaptive for the second female when the sons she produces have low competitive ability. Males of parasitoid wasps Melittobia spp. are engaged in lethal male-male combat, indicating large asymmetry in mating success among sons. If females have the ability to recognize their opponent's sex ratio, our model suggests that the severe lethal male-male combat may be one factor explaining their extremely female-biased sex ratio that is unexplainable by pre-existent models.

KW - Lethal male combat

KW - Local mate competition

KW - Melittobia

KW - Nash equilibrium

KW - Parasitoid wasp

KW - Sex ratio

KW - Stackelberg equilibrium

UR - http://www.scopus.com/inward/record.url?scp=0037594730&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0037594730&partnerID=8YFLogxK

U2 - 10.1046/j.1420-9101.2003.00558.x

DO - 10.1046/j.1420-9101.2003.00558.x

M3 - Article

C2 - 14632224

AN - SCOPUS:0037594730

VL - 16

SP - 607

EP - 613

JO - Journal of Evolutionary Biology

JF - Journal of Evolutionary Biology

SN - 1010-061X

IS - 4

ER -