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Unusually dynamic sex roles in a fish
This is the first time that a shift in sex roles has been shown in a vertebrate, and it might be explained by a large decline in male abundance, strongly skewing the sex ratio towards females.
Male mate choice selects for female coloration in a fish
Examination of mate-choice experiments with two-spotted gobies provides experimental evidence that males prefer ornamented females in a fish that is not sex-role reversed, supporting the hypothesis that female ornamentation is sexually selected.
Ultraviolet colour vision and ornamentation in bluethroats
In 13 of the 16 trials, the female associated most with the NR male, a preference that implies that UV colour vision is used in mate choice by female bluethroats, suggestive of a UV colour cue in age–related mate preferences.
Female Ornaments: Genetically Correlated or Sexually Selected?
Recent theoretical research predicts that sexual selection on females should be expected under certain social and ecological circumstances, and empiricists have provided evidence that female traits are relatively unconstrained by the genetic correlation.
Paternity and paternity assurance behaviour in the bluethroat, Luscinias.svecica
Male bluethroats apparently use mate guarding and not song as their primary paternity guard, and data indicated that, during the fertile period, there were more intrusions in territories with extra-pair offspring than in Territories with only legitimate offspring.
On the function of female ornaments: male bluethroats prefer colourful females
It is demonstrated that males associated more with, and performed more sexual behaviours towards, colourful females, and a relationship between ornament expression and female body size, which may be indicative of quality.
Egg size and parental quality influence nestling growth in the Shag
Woodcock ecology and management (T. J. Dwyer and G. L. Storm, Tech. Coord.). U.S. Fish Wildl. Serv., Wildl. Res. Rep. 14. ß G. F. $EPIK, E. L. DERLETH, & D. G. MCAULEY. 1988. Demographic
Seasonal change in female choice for male size in the two-spotted goby
This study tested seasonal changes in female choice regarding male size in a marine fish, the two-spotted goby, Gobiusculus flavescens, and predicted a reduction in female choosiness with season.
Animal signals : signalling and signal design in animal communication
The curious case of the chaffinch prowess and the resolution of animal fights sexual signals and speciation multiple nestling begging signals - reed warbler chicks and cuckoo tricks.
Male preference for colourful females affected by male size in a marine fish
This study provides the first demonstration that the size of a male affects his preference for female colour, and suggests that small males are unselective because they usually obtain few mating opportunities, as a result of being unsuccessful in mate attraction or male contest competition.