Reproduction of the common gull in the Barents, White, and Baltic Seas.
D000818:Animals; D001717:Birds / Q000502:physiology*; D005260:Female; D005298:Fertility; D005426:Flight, Animal; D008297:Male; D010058:Oviposition; D011153:Population; D012098:Reproduction; D012621:Seasons; D014586:USSR