منابع مشابه
Attractive males have greater success in sperm competition
in male reproductive success, and thus amplifies pre-copulatory sexual selection [4]. In red flour beetles, for example, male precopulatory attractiveness is positively associated with success during sperm competition [5], and in guppies, more ornamented males sire more offspring when the sperm of two males are artificially inseminated in equal numbers [6]. Male mating advantage more generally ...
متن کاملBig and tall parents do not have more sons.
The UCD community has made this article openly available. Please share how this access benefits you. Your story matters! (@ucd_oa) Some rights reserved. For more information, please see the item record link above. Title Big and tall parents do not have more sons The views expressed here do not necessarily reflect those of the Geary Institute. All errors and omissions remain those of the author ...
متن کاملFemale cowbirds have more accurate spatial memory than males.
Brown-headed cowbirds (Molothrus ater) are obligate brood parasites. Only females search for host nests and they find host nests one or more days before placing eggs in them. Past work has shown that females have a larger hippocampus than males, but sex differences in spatial cognition have not been extensively investigated. We tested cowbirds for sex and seasonal differences in spatial memory ...
متن کاملFinite groups have even more centralizers
For a finite group $G$, let $Cent(G)$ denote the set of centralizers of single elements of $G$. In this note we prove that if $|G|leq frac{3}{2}|Cent(G)|$ and $G$ is 2-nilpotent, then $Gcong S_3, D_{10}$ or $S_3times S_3$. This result gives a partial and positive answer to a conjecture raised by A. R. Ashrafi [On finite groups with a given number of centralizers, Algebra Collo...
متن کاملShould Attractive Males Sneak: The Trade-Off between Current and Future Offspring
Alternative reproductive tactics are predicted to be adopted by less competitive males when competition for fertilization is intense. Yet, in some species, competitively superior males use an alternative tactic alongside the conventional tactic. This can jeopardize their success through the conventional tactic, but surprisingly little attention has been paid to this cost. We investigated 1) the...
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ژورنال
عنوان ژورنال: Behavioral Ecology
سال: 2006
ISSN: 1465-7279,1045-2249
DOI: 10.1093/beheco/arl052