Ovarian control of growth and sexual size dimorphism in male-larger gecko

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F17%3A10360559" target="_blank" >RIV/00216208:11310/17:10360559 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1242/jeb.146597" target="_blank" >http://dx.doi.org/10.1242/jeb.146597</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1242/jeb.146597" target="_blank" >10.1242/jeb.146597</a>

Result language

angličtina

Original language name

Ovarian control of growth and sexual size dimorphism in male-larger gecko

Original language description

Sexual size dimorphism (SSD) reflects sex-specific solutions to the allocation of energy among growth, reproduction and survival; however, the proximate mechanisms behind these solutions are still poorly known even in vertebrates. In squamates, sexual differences in body size used to be attributed to direct energy allocation to energetically demanding processes, largely to reproduction. In addition, SSD is assumed to be controlled by specific endogenous mechanisms regulating growth in a sex-specific manner, namely masculinization by male gonadal androgens or feminization by ovarian hormones. We performed a manipulative growth experiment in females of the male-larger gecko Paroedura picta in order to test the reproductive cost hypothesis, the male androgen hypothesis and the ovarian hormone hypothesis. Specifically, we investigated the effect of total ovariectomy, prepubertal ovariectomy, unilateral ovariectomy, and total ovariectomy followed by exogenous estradiol, dihydrotestosterone or testosterone treatment, on female growth in comparison to males and reproductively active females. The present results and the results of our previous experiments do not support the hypotheses that SSD reflects direct energy allocation to reproduction and that male gonadal androgens are involved. However, all lines of evidence, particularly the comparable growth of reproducing intact and unilaterally ovariectomized females, were concordant with the control of SSD by ovarian hormones. We suggest that feminization of growth by female gonadal hormones should be taken into consideration as an endogenous pathway responsible for the ontogeny of SSD in squamates.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10618 - Ecology

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

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

Name of the periodical

Journal of Experimental Biology

ISSN

0022-0949

e-ISSN

—

Volume of the periodical

220

Issue of the periodical within the volume

5

Country of publishing house

GB - UNITED KINGDOM

Number of pages

9

Pages from-to

787-795

UT code for WoS article

000395742500014

EID of the result in the Scopus database

2-s2.0-85014573223