Endocrine factors involved in the failure of pintail ducks Anas acuta to reproduce in captivity.
D000818:Animals; D001717:Birds / Q000502:physiology*; D002450:Cell Communication; D004372:Ducks; D004702:Endocrine Glands / Q000502:physiology*; D012098:Reproduction / Q000502:physiology*
BIRDS/physiology; ENDOCRINE GLANDS/physiology; REPRODUCTION/physiology