management objectives for big game - nevada department of … · 2019. 9. 23. · pronghorn •...
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MANAGEMENT OBJECTIVES FOR
BIG GAME QUOTA SETTINGANNUAL TARGETED ENDPOINT
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MANAGEMENT OBJECTIVES
• Biologically appropriate
• Target a measure of maturity and age class
• Credible data available
• Surveys and harvest
• Based on historical performance
• Decreased liberal take
• Socially acceptable
• Multiple safeguards
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OBJECTIVES FOR MOUNTAIN GOAT
• Allow the harvest of 2–5% of total estimated
population.
• Small population, limited in distribution, similarities
between sexes, mandatory harvest check.
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OBJECTIVES FORBIGHORN SHEEP
• 8% of total rams (<half of population).
• Not to exceed 50% of modeled rams ≥6 years of age.
• Mandatory harvest check.
• Average age of harvested rams should exceed 6 years.
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OBJECTIVES FOR PRONGHORN
• Modeled adult (≥2-year-old) 30 bucks to 100 does
post-hunt.
• Pronghorn achieve greatest horn length and mass at
much younger ages (2–3 years) and begin declining
with age sooner than many other ungulates.
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OBJECTIVES FORELK
• Elk management plan 15–40 bulls: 100 cows; in reality much higher.
• Standard: 25–35% of the bull harvest will have a main beam length
of ≥50 inches.
• Alternative: 35–45% of harvest ≥50 inches.
• 078, 105–107, and 109; 091; and 111–115.
• Based on elk age data, elk achieve maximum antler growth from 8–
12 years of age. Antler growth objectives maintain older age classes.
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OTHER OBJECTIVES FOR ELK
• Non-Standard: Stable harvest and modeled bull to cow ratios.
• 051, 065, 075, 241, 242, and 262.
• Depredation: 101–103 and 144–145
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DISTRIBUTION OF ELK UNITS
Standard: 25–35 % 50 inch main beam.
Alternative: 35–45 inch main beam.
Non-Standard
Depredation
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OTHER CRITTERS
• Moose: Nothing yet!
• Bears: Light harvest based on age
of harvested females (>6 years), age
of harvested males (>4 years), and
proportion of females in harvest
(<30%).
• Mountain lions: Three-year average
of proportion of adult females (<35%)
and all females (<50%) in harvest.
• Turkeys and other upland game
• E.g., sage-grouse
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OBJECTIVES FORMULE DEER
• Standard units: Modeled post-hunt buck to doe ratio
30:100.
• Alternative units: Modeled post-hunt buck to doe ratio
35:100.
• 014; 194, 196; 065; 081; 114–115; 131–134; 221–223; 241–245.
• Standard buck to doe ratio results in an older age class
structure and greater hunt success. Relationship of buck
to doe ratio with fawn to doe ratio and recruitment.
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OTHER OBJECTIVES FOR MULE DEER
• Non-Standard: Manage for hunt success >35%.
• 015; 021; 195; 203; 211–213; 251–254;192; 201, 204; 202, 205–208; 291; 041–042; 261–268;
271–272.
• Harvest characteristics are a substantial data source, greatest CPUE (catch per unit
effort).
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DISTRIBUTION OF DEER UNITS
Standard: 30 bucks per 100 does.
Alternative: 35 bucks per 100 does.
Non-Standard: <35% hunt success.
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QUESTIONS?