Effect of incubation temperature on sex-dependent embryo mortality and morphological traits in Mallard

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F19%3A10397146" target="_blank" >RIV/00216208:11310/19:10397146 - isvavai.cz</a>

Alternative codes found

RIV/68081766:_____/19:00505832

Result on the web

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=IsjBrR0yk0" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=IsjBrR0yk0</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jtherbio.2019.05.007" target="_blank" >10.1016/j.jtherbio.2019.05.007</a>

Result language

angličtina

Original language name

Effect of incubation temperature on sex-dependent embryo mortality and morphological traits in Mallard

Original language description

Although birds have genetically determined sex, the sex ratio has been reported to deviate from parity in several studies. Temperature-dependent sex determination, which is common in reptiles, is absent in birds. However, females are able to adjust their investment into eggs according to the sex of the embryo, which may cause sex specific embryonic mortality. Incubation temperature may also cause sex-biased embryonic mortality, and it may differentially affect the phenotype of male and female hatchlings. We aimed to investigate differences between male and female Mallard embryos regarding their egg size, mortality during incubation and hatchling phenotype in relation to incubation temperature. Mallard eggs were incubated under six constant incubation temperatures (ranging from 35.0 to 38.0 degrees C). Hatchings were weighed, and their morphological traits were measured. We determined the sex of hatchlings and unhatched embryos by genetic analysis and found higher male embryonic mortality at 35.5 degrees C (44 males vs. 28 females) and a higher proportion of female hatchings at 38 degrees C (24 males vs. 38 females); however, these results were not statistically significant. Our results suggest that Mallard females do not differentiate quantitatively between sexes during egg production. Male hatchlings were significantly larger but not heavier than females. The size difference between sexes was most pronounced at temperatures around 36 degrees C, which is the mean temperature of naturally incubated Mallard eggs.

Czech name

—

Czech description

—

Type

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

CEP classification

—

OECD FORD branch

10618 - Ecology

Project

<a href="/en/project/KJB601110803" target="_blank" >KJB601110803: Variation in resource allocation between reproductive phases in waterfowl</a><br>

Continuities

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

Publication year

2019

Confidentiality

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

Name of the periodical

Journal of Thermal Biology

ISSN

0306-4565

e-ISSN

—

Volume of the periodical

83

Issue of the periodical within the volume

Neuveden

Country of publishing house

GB - UNITED KINGDOM

Number of pages

8

Pages from-to

95-102

UT code for WoS article

000478704700013

EID of the result in the Scopus database

2-s2.0-85066126807