Changes in Population Index Values for Sika Deer
in Eastern Hokkaido

Population index

FY

1990

FY

1991

FY

1992

FY

1993

FY

1994

FY

1995

FY

1996

FY

1997

Helicopter census      

100

   

133

108

Spotlight census    

68

100

72

115

127

101

Harvests/Hunter/day

68

71

91

100

112

144

141

 
Observations/Hunter/day

53

44

66

100

83

121

112

 

Level of agriculture/forestry damage

59

71

83

100

100

122

151

 

Railway accident

46

71

64

100

109

106

178

 

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@Proposed Female Harvest Levels and Projected Population Index Response

Fiscal year

Proposed level of female harvest

Projected population index

Remarks

FY1998

26,000-36,000

60-90

Life history characteristics used in the calculation of proposed harvest levels

1 Mean survival rate
 

Male

Female

Fawn

Ordinary snowfall year

0.85

0.90

0.70

Heavy snowfall year

0.20

0.45

0.20

(Heavy snow accumulates once in 20 years)
2 Pregnancy rate 0.90
3 Female fawn per doe ratio: 0.425
4 Adult sex ratio Male : Female = 4 : 10

FY1999

22,000-24,000

FY2000

16,000-18,000

40-60

FY2001

10,000-15,000

* Proposed harvest levels will be adjusted annually based upon previous years' harvests.
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