Variation in the secondary sex-ratio of the grey seal Halichoerus grypus (Fab.) during the breeding season.
D000818:Animals; D001947:Breeding; D010828:Physiology, Comparative; D012098:Reproduction; D046048:Seals, Earless; D012621:Seasons; D012723:Sex; D012744:Sex Ratio
PHYSIOLOGY, COMPARATIVE; REPRODUCTION; SEX