DHEA and territoriality during the nonbreeding season in male American martens (Martes americana)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00027014%3A_____%2F18%3AN0000097" target="_blank" >RIV/00027014:_____/18:N0000097 - isvavai.cz</a>

Výsledek na webu

<a href="https://vuzv.cz/_privat/18096.pdf" target="_blank" >https://vuzv.cz/_privat/18096.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/jmammal/gyy067" target="_blank" >10.1093/jmammal/gyy067</a>

Jazyk výsledku

angličtina

Název v původním jazyce

DHEA and territoriality during the nonbreeding season in male American martens (Martes americana)

Popis výsledku v původním jazyce

Nonbreeding season territoriality is found in many mammal species irrespective of diet, being found in carnivores, granivores, and herbivores. However, we know the hormonal basis for this behavior in virtually none. American martens (Martes americana) show strong intrasexual, year-round territoriality. We collected serum samples from both territorial and transient males and documented size metrics and movement patterns with live-capture and radiotelemetry from September to June in 3 years in Southeast Alaska. Dehydroepiandrosterone (DHEA—a prohormone that can be converted in the brain to active gonadal hormones) levels were high (comparable to humans and rodents showing nonbreeding season spacing behavior) and did not change over the nonbreeding season in territorial males. In contrast, testosterone levels were low in autumn and increased as the summer breeding season approached. Territorial males were larger than transients in some measures and had higher testosterone levels, but similar DHEA and cortisol levels (total and free). DHEA levels declined with age. Our evidence is consistent with the hypothesis that DHEA, not testosterone, is the basis for territoriality outside the breeding season in martens, but collection of serum from females and experimental manipulations are required to provide conclusive evidence.

Název v anglickém jazyce

DHEA and territoriality during the nonbreeding season in male American martens (Martes americana)

Popis výsledku anglicky

Nonbreeding season territoriality is found in many mammal species irrespective of diet, being found in carnivores, granivores, and herbivores. However, we know the hormonal basis for this behavior in virtually none. American martens (Martes americana) show strong intrasexual, year-round territoriality. We collected serum samples from both territorial and transient males and documented size metrics and movement patterns with live-capture and radiotelemetry from September to June in 3 years in Southeast Alaska. Dehydroepiandrosterone (DHEA—a prohormone that can be converted in the brain to active gonadal hormones) levels were high (comparable to humans and rodents showing nonbreeding season spacing behavior) and did not change over the nonbreeding season in territorial males. In contrast, testosterone levels were low in autumn and increased as the summer breeding season approached. Territorial males were larger than transients in some measures and had higher testosterone levels, but similar DHEA and cortisol levels (total and free). DHEA levels declined with age. Our evidence is consistent with the hypothesis that DHEA, not testosterone, is the basis for territoriality outside the breeding season in martens, but collection of serum from females and experimental manipulations are required to provide conclusive evidence.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10614 - Behavioral sciences biology

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Mammalogy

ISSN

0022-2372

e-ISSN

—

Svazek periodika

99

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

826-835

Kód UT WoS článku

000441801100006

EID výsledku v databázi Scopus

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