Sex change evolution and cost of reproduction

Yoh Iwasa

Research output: Contribution to journalArticle

78 Citations (Scopus)

Abstract

Sex change evolution is studied theoretically. I developed an analysis based on dynamic programming to confirm the evolutionary stability in a wide class of sexual schedules and to show how various mechanisms are combined to determine the sex change evolution. First, it is shown that the evolutionarily stable sexual strategy may include an extended nonreproductive period that intervenes between male and female phases, if reproductively active individuals suffer costs of enhanced mortality or reduced growth rate, in addition to the sexual difference in the way fertility increases with size (or age). This pattern corresponds to "early sex changer" observed among several coral reef fish species. Second, I show that the difference between sexes either in mortality or in growth rate favors the evolution of sex changer even if the size advantage is the same between the two sexes. This confirms two alternative mechanisms (mortality-advantage model and growth-rate-advantage model) for sex change evolution. [Behav Ecol 1991; 2: 56-68]

Original languageEnglish
Pages (from-to)56-68
Number of pages13
JournalBehavioral Ecology
Volume2
Issue number1
DOIs
Publication statusPublished - Mar 1 1991

Fingerprint

sex reversal
gender
cost
mortality
dynamic programming
coral reefs
coral reef
fertility
fish

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Animal Science and Zoology

Cite this

Sex change evolution and cost of reproduction. / Iwasa, Yoh.

In: Behavioral Ecology, Vol. 2, No. 1, 01.03.1991, p. 56-68.

Research output: Contribution to journalArticle

Iwasa, Yoh. / Sex change evolution and cost of reproduction. In: Behavioral Ecology. 1991 ; Vol. 2, No. 1. pp. 56-68.
@article{987a7e5600b148318df76daabeaa4dba,
title = "Sex change evolution and cost of reproduction",
abstract = "Sex change evolution is studied theoretically. I developed an analysis based on dynamic programming to confirm the evolutionary stability in a wide class of sexual schedules and to show how various mechanisms are combined to determine the sex change evolution. First, it is shown that the evolutionarily stable sexual strategy may include an extended nonreproductive period that intervenes between male and female phases, if reproductively active individuals suffer costs of enhanced mortality or reduced growth rate, in addition to the sexual difference in the way fertility increases with size (or age). This pattern corresponds to {"}early sex changer{"} observed among several coral reef fish species. Second, I show that the difference between sexes either in mortality or in growth rate favors the evolution of sex changer even if the size advantage is the same between the two sexes. This confirms two alternative mechanisms (mortality-advantage model and growth-rate-advantage model) for sex change evolution. [Behav Ecol 1991; 2: 56-68]",
author = "Yoh Iwasa",
year = "1991",
month = "3",
day = "1",
doi = "10.1093/beheco/2.1.56",
language = "English",
volume = "2",
pages = "56--68",
journal = "Behavioral Ecology",
issn = "1045-2249",
publisher = "Oxford University Press",
number = "1",

}

TY - JOUR

T1 - Sex change evolution and cost of reproduction

AU - Iwasa, Yoh

PY - 1991/3/1

Y1 - 1991/3/1

N2 - Sex change evolution is studied theoretically. I developed an analysis based on dynamic programming to confirm the evolutionary stability in a wide class of sexual schedules and to show how various mechanisms are combined to determine the sex change evolution. First, it is shown that the evolutionarily stable sexual strategy may include an extended nonreproductive period that intervenes between male and female phases, if reproductively active individuals suffer costs of enhanced mortality or reduced growth rate, in addition to the sexual difference in the way fertility increases with size (or age). This pattern corresponds to "early sex changer" observed among several coral reef fish species. Second, I show that the difference between sexes either in mortality or in growth rate favors the evolution of sex changer even if the size advantage is the same between the two sexes. This confirms two alternative mechanisms (mortality-advantage model and growth-rate-advantage model) for sex change evolution. [Behav Ecol 1991; 2: 56-68]

AB - Sex change evolution is studied theoretically. I developed an analysis based on dynamic programming to confirm the evolutionary stability in a wide class of sexual schedules and to show how various mechanisms are combined to determine the sex change evolution. First, it is shown that the evolutionarily stable sexual strategy may include an extended nonreproductive period that intervenes between male and female phases, if reproductively active individuals suffer costs of enhanced mortality or reduced growth rate, in addition to the sexual difference in the way fertility increases with size (or age). This pattern corresponds to "early sex changer" observed among several coral reef fish species. Second, I show that the difference between sexes either in mortality or in growth rate favors the evolution of sex changer even if the size advantage is the same between the two sexes. This confirms two alternative mechanisms (mortality-advantage model and growth-rate-advantage model) for sex change evolution. [Behav Ecol 1991; 2: 56-68]

UR - http://www.scopus.com/inward/record.url?scp=0026308119&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0026308119&partnerID=8YFLogxK

U2 - 10.1093/beheco/2.1.56

DO - 10.1093/beheco/2.1.56

M3 - Article

AN - SCOPUS:0026308119

VL - 2

SP - 56

EP - 68

JO - Behavioral Ecology

JF - Behavioral Ecology

SN - 1045-2249

IS - 1

ER -