Seasonal changes in frequency of the "yellow" morph of the isopod, Sphaeroma rugicauda.
D000818:Animals; D003445:Crustacea; D005787:Gene Frequency; D005799:Genes, Dominant; D008136:Longevity; D010641:Phenotype; D010858:Pigmentation; D011110:Polymorphism, Genetic; D012621:Seasons; D012641:Selection, Genetic; D013696:Temperature; D014867:Water
D014867:Water