Sensory drive predicts coevolution of mate choice signals with the sensory systems detecting those sig nals. Guppies are a classic model for sensory drive as mate preferences based on coloration differ across individu...Sensory drive predicts coevolution of mate choice signals with the sensory systems detecting those sig nals. Guppies are a classic model for sensory drive as mate preferences based on coloration differ across individuals and populations. A large body of work has identified variation in color vision, yet we lack a dir ect tie between how such variation in color vision influences variation in color preference. Here we bring together studies that have investigated guppy vision over the past 40years to： （1） highlight our current understanding of where variation occurs in the guppy color vision pathway and （2） suggest future ave nues of research into sources of visual system variation that could influence guppy color preference. This will allow researchers to design careful studies that couple measures of color preference with measures of visual system variation from the same individual or population. Such studies will finally provide im portant answers as to what sets the direction and speed of mate preference evolution via sensory drive.展开更多
Hundreds of species of cichlid fishes have evolved in the Great Lakes of Africa.These colorful fishes are known for their ecological diversity.Here,we discuss the diversity of their visual systems.Cichlids have seven ...Hundreds of species of cichlid fishes have evolved in the Great Lakes of Africa.These colorful fishes are known for their ecological diversity.Here,we discuss the diversity of their visual systems.Cichlids have seven unique cone opsin genes,which produce visual pigments sensitive from the ultraviolet to the red end of the spectrum.Different species typically express three visual pigments to produce a trichromatic visual system.Because species differ in which sets of opsin genes they express,visual sensitivities can differ widely.In addition to the large visual pigment shifts from changing gene expression,cichlids can also more finely tune visual pigments through altera-tions in opsin amino acid sequence.Both of these tuning mechanisms likely play an important role in cichlid ecology and could contribute to the evolution of cichlid diversity through speciation.展开更多
文摘Sensory drive predicts coevolution of mate choice signals with the sensory systems detecting those sig nals. Guppies are a classic model for sensory drive as mate preferences based on coloration differ across individuals and populations. A large body of work has identified variation in color vision, yet we lack a dir ect tie between how such variation in color vision influences variation in color preference. Here we bring together studies that have investigated guppy vision over the past 40years to： （1） highlight our current understanding of where variation occurs in the guppy color vision pathway and （2） suggest future ave nues of research into sources of visual system variation that could influence guppy color preference. This will allow researchers to design careful studies that couple measures of color preference with measures of visual system variation from the same individual or population. Such studies will finally provide im portant answers as to what sets the direction and speed of mate preference evolution via sensory drive.
文摘Hundreds of species of cichlid fishes have evolved in the Great Lakes of Africa.These colorful fishes are known for their ecological diversity.Here,we discuss the diversity of their visual systems.Cichlids have seven unique cone opsin genes,which produce visual pigments sensitive from the ultraviolet to the red end of the spectrum.Different species typically express three visual pigments to produce a trichromatic visual system.Because species differ in which sets of opsin genes they express,visual sensitivities can differ widely.In addition to the large visual pigment shifts from changing gene expression,cichlids can also more finely tune visual pigments through altera-tions in opsin amino acid sequence.Both of these tuning mechanisms likely play an important role in cichlid ecology and could contribute to the evolution of cichlid diversity through speciation.
