Počet záznamů: 1

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

SYSNO ASEP	0323111
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	Sperm depletion as a consequence of increased sperm competition risk in the European bitterling, Rhodeus amarus
Překlad názvu	Nedostatek spermií jako důsledek zvýšeného rizika kompetice spermií u hořavky duhové (Rhodeus amarus)
Tvůrce(i)	Smith, C. (GB) Pateman-Jones, C. (GB) Zieba, G. (PL) Przybylski, M. (PL) Reichard, Martin (UBO-W)_{RID, ORCID, SAI, SAI}
Celkový počet autorů	5
Zdroj.dok.	Animal Behaviour. - : Elsevier - ISSN 0003-3472 Roč. 77, č. 5 (2009), s. 1227-1233
Poč.str.	7 s.
Jazyk dok.	eng - angličtina
Země vyd.	GB - Velká Británie
Klíč. slova	alternative mating tactics ; European bitterling ; mating system ; sexual conflict ; sexual selection ; sneaking ; sperm competition ; sperm economy
Vědní obor RIV	EG - Zoologie
CEZ	AV0Z60930519 - UBO-W (2005-2011)
UT WOS	000265283900030
DOI	10.1016/j.anbehav.2009.01.027
Anotace	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 temporal scales 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.
Pracoviště	Ústav biologie obratlovců
Kontakt	Hana Slabáková, slabakova@ivb.cz, Tel.: 543 422 524
Rok sběru	2009

Počet záznamů: 1