Effects of energy and thermoregulation time on physiological state and sexual signal in a lizard

Boglárka Mészáros, G. Herczeg, Katalin Bajer, J. Török, Orsolya Molnár

Research output: Contribution to journalArticle

Abstract

Theory of sexual selection states that males often develop showy signals, which reduce their survival but increase their reproductive success. During mate choice, these conspicuous signals can be honest indicators of individual quality conveying information about the signaler's physiological state. Sexually selected signals are influenced by many environmental factors; however, whether signals and physiological state are affected together is rarely studied. The ultraviolet-blue throat color of male Lacerta viridis is an intra- and intersexually selected signal connected to blood parasite infection and influenced by environmental factors. The aim of this study was to experimentally investigate how ecologically relevant environmental factors affect color signal intensity and key physiological traits parallel. During the mating season, we exposed 40 adult male lizards infected with blood parasites to food and basking time treatments in a full factorial design. We measured color, amount of reactive oxygen metabolites (ROMs), hematocrit, immunocompetence, and blood parasite intensity before and after treatments. High basking time resulted in elevated immunocompetence coupled with increased ROMs. The high food treatment increased nuptial color brightness, but also increased ROMs and decreased immunocompetence. In summary, our study provides experimental evidence about environmentally induced parallel changes in an honest sexual signal and several quality-indicator physiological traits. We showed that available energy and time for high metabolism have independent and sometimes opposite effects on individual state.

Original languageEnglish
Pages (from-to)570-578
Number of pages9
JournalJournal of Experimental Zoology Part A: Ecological and Integrative Physiology
Volume327
Issue number9
DOIs
Publication statusPublished - Nov 1 2017

Fingerprint

thermoregulation
Lizards
Body Temperature Regulation
physiological state
Immunocompetence
lizard
immunocompetence
lizards
Color
reactive oxygen species
hemoparasite
color
energy
Oxygen
parasites
environmental factors
blood
Parasites
metabolite
environmental factor

ASJC Scopus subject areas

  • Animal Science and Zoology
  • Ecology, Evolution, Behavior and Systematics
  • Genetics
  • Molecular Biology
  • Physiology

Cite this

Effects of energy and thermoregulation time on physiological state and sexual signal in a lizard. / Mészáros, Boglárka; Herczeg, G.; Bajer, Katalin; Török, J.; Molnár, Orsolya.

In: Journal of Experimental Zoology Part A: Ecological and Integrative Physiology, Vol. 327, No. 9, 01.11.2017, p. 570-578.

Research output: Contribution to journalArticle

@article{b71e2e5e0157488fb54ecc575347fc96,
title = "Effects of energy and thermoregulation time on physiological state and sexual signal in a lizard",
abstract = "Theory of sexual selection states that males often develop showy signals, which reduce their survival but increase their reproductive success. During mate choice, these conspicuous signals can be honest indicators of individual quality conveying information about the signaler's physiological state. Sexually selected signals are influenced by many environmental factors; however, whether signals and physiological state are affected together is rarely studied. The ultraviolet-blue throat color of male Lacerta viridis is an intra- and intersexually selected signal connected to blood parasite infection and influenced by environmental factors. The aim of this study was to experimentally investigate how ecologically relevant environmental factors affect color signal intensity and key physiological traits parallel. During the mating season, we exposed 40 adult male lizards infected with blood parasites to food and basking time treatments in a full factorial design. We measured color, amount of reactive oxygen metabolites (ROMs), hematocrit, immunocompetence, and blood parasite intensity before and after treatments. High basking time resulted in elevated immunocompetence coupled with increased ROMs. The high food treatment increased nuptial color brightness, but also increased ROMs and decreased immunocompetence. In summary, our study provides experimental evidence about environmentally induced parallel changes in an honest sexual signal and several quality-indicator physiological traits. We showed that available energy and time for high metabolism have independent and sometimes opposite effects on individual state.",
author = "Bogl{\'a}rka M{\'e}sz{\'a}ros and G. Herczeg and Katalin Bajer and J. T{\"o}r{\"o}k and Orsolya Moln{\'a}r",
year = "2017",
month = "11",
day = "1",
doi = "10.1002/jez.2143",
language = "English",
volume = "327",
pages = "570--578",
journal = "Journal of Experimental Zoology Part A: Ecological and Integrative Physiology",
issn = "2471-5638",
publisher = "John Wiley and Sons Inc.",
number = "9",

}

TY - JOUR

T1 - Effects of energy and thermoregulation time on physiological state and sexual signal in a lizard

AU - Mészáros, Boglárka

AU - Herczeg, G.

AU - Bajer, Katalin

AU - Török, J.

AU - Molnár, Orsolya

PY - 2017/11/1

Y1 - 2017/11/1

N2 - Theory of sexual selection states that males often develop showy signals, which reduce their survival but increase their reproductive success. During mate choice, these conspicuous signals can be honest indicators of individual quality conveying information about the signaler's physiological state. Sexually selected signals are influenced by many environmental factors; however, whether signals and physiological state are affected together is rarely studied. The ultraviolet-blue throat color of male Lacerta viridis is an intra- and intersexually selected signal connected to blood parasite infection and influenced by environmental factors. The aim of this study was to experimentally investigate how ecologically relevant environmental factors affect color signal intensity and key physiological traits parallel. During the mating season, we exposed 40 adult male lizards infected with blood parasites to food and basking time treatments in a full factorial design. We measured color, amount of reactive oxygen metabolites (ROMs), hematocrit, immunocompetence, and blood parasite intensity before and after treatments. High basking time resulted in elevated immunocompetence coupled with increased ROMs. The high food treatment increased nuptial color brightness, but also increased ROMs and decreased immunocompetence. In summary, our study provides experimental evidence about environmentally induced parallel changes in an honest sexual signal and several quality-indicator physiological traits. We showed that available energy and time for high metabolism have independent and sometimes opposite effects on individual state.

AB - Theory of sexual selection states that males often develop showy signals, which reduce their survival but increase their reproductive success. During mate choice, these conspicuous signals can be honest indicators of individual quality conveying information about the signaler's physiological state. Sexually selected signals are influenced by many environmental factors; however, whether signals and physiological state are affected together is rarely studied. The ultraviolet-blue throat color of male Lacerta viridis is an intra- and intersexually selected signal connected to blood parasite infection and influenced by environmental factors. The aim of this study was to experimentally investigate how ecologically relevant environmental factors affect color signal intensity and key physiological traits parallel. During the mating season, we exposed 40 adult male lizards infected with blood parasites to food and basking time treatments in a full factorial design. We measured color, amount of reactive oxygen metabolites (ROMs), hematocrit, immunocompetence, and blood parasite intensity before and after treatments. High basking time resulted in elevated immunocompetence coupled with increased ROMs. The high food treatment increased nuptial color brightness, but also increased ROMs and decreased immunocompetence. In summary, our study provides experimental evidence about environmentally induced parallel changes in an honest sexual signal and several quality-indicator physiological traits. We showed that available energy and time for high metabolism have independent and sometimes opposite effects on individual state.

UR - http://www.scopus.com/inward/record.url?scp=85041121608&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85041121608&partnerID=8YFLogxK

U2 - 10.1002/jez.2143

DO - 10.1002/jez.2143

M3 - Article

VL - 327

SP - 570

EP - 578

JO - Journal of Experimental Zoology Part A: Ecological and Integrative Physiology

JF - Journal of Experimental Zoology Part A: Ecological and Integrative Physiology

SN - 2471-5638

IS - 9

ER -