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Good-genes effects in sexual selection
TLDR
The results suggest that viability–based sexual selection is widespread across taxa, and indicate that the effect of good genes as a viability benefit accruing to choosy females is relatively minor. Expand
Problems in the measurement of evenness in ecology
Evenness is considered as the measure of equality of abundances in a community. By comparing artificial abundance distributions the modified Hill's ratio (N2-1)/(N,1) was found to be the most easilyExpand
Male coloration and species recognition in sympatric flycatchers
TLDR
Results from long-term studies in the pied flycatcher Ficedula hypoleuca suggest that factors associated with species recognition may also be important for male coloration, and interspecific effects related to species recognition can probably explain the dull plumage colour of piedFlycatcher males in sympatry. Expand
Hybridization between Pied and Collared Flycatchers—sexual selection and speciation theory
TLDR
It seems that interactions between the two species are far more complex than predicted by the theory of speciation by reinforcement, and therefore reinforcement probably cannot explain the geographical pattern of colour variation in Pied Flycatcher males. Expand
Energetic costs of size and sexual signalling in a wolf spider
TLDR
The results indicate that sexual signalling in the wolf spider Hygrolycosa rubrofasciata (Ohlert) is highly energetically demanding, which may be the main reason for the honesty of signalling in this species. Expand
Imperfect Batesian mimicry—the effects of the frequency and the distastefulness of the model
TLDR
The experiment supports the most classical predictions in the theories of the origin and maintenance of Batesian mimicry: Batesian mimics gain most when the models outnumber them and the models survived significantly better the more distasteful they were. Expand
HERITABILITY AND SELECTION ON TARSUS LENGTH IN THE PIED FLYCATCHER (FICEDULA HYPOLEUCA)
TLDR
A full‐sib correlation yields an estimate of the heritability twice as high as the parent‐offspring regression did, indicating that shared environment effects, which are not correlated with the tarsus length of parents, must be important. Expand
Patterns of variation in tail ornament size in birds
TLDR
Elongated tail ornaments in four species of whydahs Vidua, the forktailed flycatcher Tyrannus savana and the Asian paradise flycatchers Terpsiphone paradisi did not show higher geographical variation than the body size characters, suggesting that there is no line of equilibria for these ornamments. Expand
Microsatellite markers reveal the potential for kin selection on black grouse leks
TLDR
It is shown, using microsatellite analysis, that males but not females of a lekking bird (the black grouse, Tetrao tetrix) are genetically structured at the lek level, and this structuring has the consequence that males on any specific lek should be more related than expected by chance as indicated by genetic data. Expand
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