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

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/68081766:_____/19:00505832

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10618 - Ecology

Projekt

<a href="/cs/project/KJB601110803" target="_blank" >KJB601110803: Variabilita v přerozdělování zdrojů mezi fázemi hnízdního pokusu u kachen</a><br>

Návaznosti

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

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Journal of Thermal Biology

ISSN

0306-4565

e-ISSN

—

Svazek periodika

83

Číslo periodika v rámci svazku

Neuveden

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

95-102

Kód UT WoS článku

000478704700013

EID výsledku v databázi Scopus

2-s2.0-85066126807