title: Genetic variation in marine fishes as a test of the niche-variation hypothesis.
mesh_terms: D000818:Animals; D002980:Climate; D004798:Enzymes / Q000096:biosynthesis; D005399:Fishes / Q000378:metabolism*; D014644:Genetic Variation; D006579:Heterozygote; D011110:Polymorphism, Genetic; D014176:Protein Biosynthesis; D012641:Selection, Genetic; D013045:Species Specificity
chemical_list: D004798:Enzymes