Male mating behavior and ejaculate expenditure under sperm competition risk in the eastern mosquitofish
نویسندگان
چکیده
منابع مشابه
Male-derived cuticular hydrocarbons signal sperm competition intensity and affect ejaculate expenditure in crickets.
Female sexual promiscuity can have significant effects on male mating decisions because it increases the intensity of competition between ejaculates for fertilization. Because sperm production is costly, males that can detect multiple matings by females and allocate sperm strategically will have an obvious fitness advantage. The presence of rival males is widely recognized as a cue used by male...
متن کاملMale crickets adjust ejaculate quality with both risk and intensity of sperm competition.
Sperm competition theory predicts that males should increase their expenditure on the ejaculate with increasing risk of sperm competition, but decrease their expenditure with increasing intensity. There is accumulating evidence for sperm competition theory, based on examinations of testes size and/or the numbers of sperm ejaculated. However, recent studies suggest that ejaculate quality can als...
متن کاملSequential male mate choice under sperm competition risk
Male eagerness to mate is a central paradigm of sexual selection theory. However, limited sperm supplies mean that male sexual restraint might sometimes be favored under promiscuous mating. Here, we demonstrate dynamic plasticity in male mating effort when females are encountered sequentially under varying sperm competition risk. Rather than showing consistent eagerness to mate, male house mice...
متن کاملCasanovas are liars: behavioral syndromes, sperm competition risk, and the evolution of deceptive male mating behavior in live-bearing fishes
Mate choice in many species is sensitive to social cues from neighboring individuals; for example, animals can copy mate choice decisions. If males copy other males' choices, sperm of two or more males can compete for fertilization of the female's ova. In the internally fertilizing fish Poecilia mexicana, males respond to the presence of rivals with reduced expression of mating preferences (aud...
متن کاملCasanovas are liars : behavioral syndromes , sperm competition risk , and the evolution of deceptive male mating
Male reproductive biology can by characterized through competition over mates as well as mate choice. Multiple mating and male mate choice copying, especially in internally fertilizing species, set the stage for increased sperm competition, i.e., sperm of two or more males can compete for fertilization of the female’s ova. In the internally fertilizing fish , males respond Poecilia mexicana to ...
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ژورنال
عنوان ژورنال: Behavioral Ecology
سال: 2003
ISSN: 1465-7279
DOI: 10.1093/beheco/14.2.268