Record Display for the EPA National Library Catalog


Main Title Differential White Blood Cell Values of the Mallard ('Anas platyrhynchos') Across Different Ages and Reproductive States.
Author Fairbrother, A. ; O'Loughlin, D. ;
CORP Author Corvallis Environmental Research Lab., OR. ;California Univ., Davis. School of Veterinary Medicine.
Publisher c1990
Year Published 1990
Report Number EPA/600/J-90/022;
Stock Number PB90-219692
Additional Subjects Leukocytes ; Reproduction(Biology) ; Ducks ; Blood platelets ; Eggs ; Graphs(Charts) ; Reprints ; Age factors
Library Call Number Additional Info Location Last
NTIS  PB90-219692 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 7p
Differential white cell counts were recorded for adult mallards (Anas platyrhynchos) of both sexes during several stages of reproduction: pre-egg laying, egg-laying, incubating, molting, and postreproductive. Similar counts were made for young birds from 5 to 60 days of age. There were no significant differences amongst the cell ratios due to sex or reproductive state of the adult birds. Nonlaying and laying birds had similar numbers of thrombocytes which were significantly greater than thrombocyte numbers of incubating, molting, or postreproductive birds. Young birds had a decrease in the percent lymphocytes from 50 to 60+ days of age and a concomitant, compensating increase in percent heterophils. Thrombocyte numbers increased from 5 days old to a peak at 18 days of age, after which they did not vary significantly. (Copyright (c) Wildlife Disease Association 1990.)