title: Responses of domestic fowl to repeated +Gz acceleration.
abstract: The responses of domestic fowl to repeated exposures of 4 min to +6Gz (8 times daily, 5 d weekly) are reported. Survivorship curves for the test group of 48 birds divided into three response categories: mode I, highly susceptible, with all individuals dying on the first day; mode II, more tolerant, with mortality occurring within the first 20 d of treatment; and mode III, highly tolerant, with mortality occurring only after 20 d of treatment. Observations of lymphocyte frequency, an index of systemic stress, and postmortem observations indicate that this heterogeniety has a biological basis.
mesh_terms: D000054:Acceleration / Q000009:adverse effects*; D000337:Aerospace Medicine; D000818:Animals; D002645:Chickens / Q000502:physiology*; D006112:Gravitation; D008212:Lymphocyte Depletion; D008297:Male; D009026:Mortality; D013997:Time Factors