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QDM

GENERALIZED SUSTAINED YIELD TABLE FOR FREE RANGING WHITE-TAILED DEER
DEER DENSITY AND HARVEST METHOD   DATA IN SPRING PRE-BIRTH, MAY 1st DATA AT BIRTH YEARLY NON-HARVEST LOSSES THRU MORTALITY AND DISPERSAL RATE OF RECRUITMENT OCTOBER 1st YEARLY HARVEST
  MALES: ADULTS AND YEARLING FEMALES: 1 YEAR FEMALES: 2 YRS+ BUCK TO DOE RATIO FETUS'S YEARLING DOES FETUS'S ADULT DOES TOTAL FAWNS BORN ADULT DOE TO FAWN RATIO MALE FAWNS % ADULT MALES ADULT FEMALES FAWNS TOTAL % TOTAL No. ADULT MALES ADULT FEMALES FAWNS TOTAL
                                         
100% NONE   48 8 44 1 : 1.1 0 39.6 39.6 1 : 0.76 58 11.04 7.8 20.8 39.6 0 0 0 0 0 0
90% TRAD. 70% BUCKS ONLY   20.7 10.8 58.5 1 : 3.3 0 53.6 53.6 1 : 0.77 58 2.08 10.6 28.1 40.8 14 12.8 12.8 VARIES 0 0 12.8
60% TRAD. 70% BUCKS & DOES   19.8 12.9 27.3 1 : 2 2.2 40.0 42.2 1 : 1.46 52 2.3 5.5 6.4 14.2 47 28 12.9 CONST. 9.3 5.8 28
60% QDM SELECTIVE   15; 1 YR 11; 2 YR+ 26; TOT. 12.2 21.8 1:1.3 NATURAL 5.4 39.2 44.6 QDM GOAL 1:1.8 QDM KEY 52 2.4 3.2 8.0 13.6 52 31 1.5;1 YR 8.8;2 YR+ 10.3;TOT. 11.3 9.4 31
                                         
  QDM BUCK TO DOE HARVEST RATIO IS 1 : 1.1
NOTE:
CHART DATA IS FROM PROFESSOR DALE McCOLLOUGH'S RESEARCH AT GEORGE RESERVE MICH., (AN 1100 ACRE ENCLOSURE). IT HAS BEEN UPDATED TO APPLY TO FREE RANGING DEER AT CLEMSON UNIV. S.C. BY PROFESSOR ROBERT L. DOWNING AND PROFESSOR DAVID C. GUYNN JR..
 
60% QDM DATA REFLECTS A HIGH GRADE QDM PROGRAM PROTECTING 90% OF YEARLING BUCKS, HARVESTING 80% OF 2 1/2+ YEAR OLDS AND HAVING A BUCK TO DOE RATIO OF 1 : 1.3 (NATURAL RATIO). HARVESTING AN ADEQUATE NUMBER OF BOTH DOES AND FAWNS IS VITAL. HABITAT IS MAINTAINED WITH CUTTINGS AND PLANTINGS FOR YEAR ROUND NUTRITIOUS FORAGE.
                                         
90% TRADITIONAL 70% BUCKS ONLY HARVEST SHOWS A BUCK TO DOE RATIO OF 1 : 3.3, AND 60% TRADITIONAL 70% BUCKS & DOES HARVESTED SHOWS A BUCK TO DOE RATIO OF 1 : 2. THESE SENSIBLE BUCK TO DOE RATIOS ARE ACCURATE AS CLAIMED BY MOST STATE DNR AGENCIES, BUT ARE ONLY TRUE IF A 70 % MAXIMUM BUCK HARVEST IS ACCOMPLISHED. IT IS IMPORTANT TO ENFORCE THIS CRITICAL FUNCTION. IT IS VERY EASY TO GET A SKEWED 1 : 5 OR WORSE BUCK TO DOE RATIO IN A HIGH HUNTER DENSITY AREA WHERE TOO MANY BUCKS AND NOT ENOUGH DOES ARE HARVESTED. IF YOU ARE NOT SEEING ANY BUCKS, THERE'S A REASON FOR IT. AS PROFESSOR DAVID GUYNN ONCE TOLD ME "IT'S BECAUSE THEY'RE NOT THERE".
  ED SPINAZZOLA PRESIDENT MID-MICH. BRANCH QDMA

Last Updated on 1/24/00
By Boyd Wiltse