Nedostatek spermií jako důsledek zvýšeného rizika kompetice spermií u hořavky duhové (Rhodeus amarus)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081766%3A_____%2F09%3A00323111" target="_blank" >RIV/68081766:_____/09:00323111 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Sperm depletion as a consequence of increased sperm competition risk in the European bitterling, Rhodeus amarus

Popis výsledku v původním jazyce

Sperm depletion occurs when males are unable to maintain ejaculate size over successive ejaculations and appears to be widespread across multiple taxa. We used the European bitterling in experiments to investigate sperm depletion over different temporalscales at different levels of sperm competition risk. The spermatozoa density of territorial male ejaculates declined over five consecutive ejaculations, but mean ejaculate size was significantly larger if the male was exposed to a rival, suggesting males were sensitive to sperm competition risk and modulated ejaculate size in accordance with theoretical models. However, following successive matings over the course of a day, males exposed to rivals produced significantly smaller ejaculates than males with a low risk of sperm competition. Results are discussed with reference to a possible intersexualconflict over the size and distribution of ejaculates in the context of male sperm depletion and femalesperm limitation.

Název v anglickém jazyce

Sperm depletion as a consequence of increased sperm competition risk in the European bitterling, Rhodeus amarus

Popis výsledku anglicky

Sperm depletion occurs when males are unable to maintain ejaculate size over successive ejaculations and appears to be widespread across multiple taxa. We used the European bitterling in experiments to investigate sperm depletion over different temporalscales at different levels of sperm competition risk. The spermatozoa density of territorial male ejaculates declined over five consecutive ejaculations, but mean ejaculate size was significantly larger if the male was exposed to a rival, suggesting males were sensitive to sperm competition risk and modulated ejaculate size in accordance with theoretical models. However, following successive matings over the course of a day, males exposed to rivals produced significantly smaller ejaculates than males with a low risk of sperm competition. Results are discussed with reference to a possible intersexualconflict over the size and distribution of ejaculates in the context of male sperm depletion and femalesperm limitation.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

EG - Zoologie

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2009

Kód důvěrnosti údajů

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

Název periodika

Animal Behaviour

ISSN

0003-3472

e-ISSN

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Svazek periodika

77

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

7

Strana od-do

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Kód UT WoS článku

000265283900030

EID výsledku v databázi Scopus

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