Scavenging ECOLOGY, VIGILANCE OF COYOTES, AND BEHAVIORAL CASCADES IN RESPONSE TO GRAY WOLF REINTRODUCTION IN YELLOWST

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´╗┐Rummaging ECOLOGY, VIGILANCE OF COYOTES, AND "BEHAVIORAL CASCADES" IN RESPONSE TO GRAY WOLF REINTRODUCTION IN YELLOWSTONE NATIONAL PARK T. Adam Switalski Post-Project Seminar December 11, 2001

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Introduction Species misfortune: Carnivores especially at hazard: Inherent irregularity Large natural surroundings necessities Competition with people

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Introduction Extirpation of Keystone Predators prompts to: Disturbed unsteady frameworks Increased quantities of prey and contending carnivores Expanded range Loss of hostile to savage practices Vigilance Avoidance Ultimately, falling impacts

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Wolf Range: Past, Present, and Future

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Introduction Case consider: reintroduction of scoundrels Park How are coyotes figuring out how to exist together with wolves? How are different species reacting numerically and behaviorally? What are the falling impacts?

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Foraging Ecology and Vigilance of Coyotes in Response to Wolf Reintroduction Introduction Study zone Methods Results Discussion

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Coyote and Wolf Coexistence No concurrence Resource dividing Spatial evasion Temporal partition Low level of eating routine cover Different living space utilize

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Return of the Wolf to YNP Historical conjunction 1995, wolves translocated from Canada Designated "unnecessary exploratory" populace Population expanded rapidly with most noteworthy fertility recorded for species

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Foraging Ecology and Vigilance: Research Questions

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Foraging Ecology and Vigilance: Research Questions Do coyotes display diverse behavioral time spending plans now when contrasted with before wolves were reintroduced into YNP?

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Foraging Ecology and Vigilance: Research Questions Do coyotes show diverse behavioral time spending plans now when contrasted with before wolves were reintroduced into YNP? Do coyotes living between wolf packs ('support zones') show diverse behavioral time spending plans than coyotes in high wolf utilize ranges?

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Foraging Ecology and Vigilance: Research Questions Now that wolves have ended up built up in the Lamar Valley, do coyotes show distinctive behavioral time spending plans when wolves are physically present instead of their nonappearance?

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Study Area: Lamar Valley

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Food Resources

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Methods Observations of coyotes and wolves from winter 1998 to summer 2000

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Methods Recorded : Wolf and coyote area Type of conduct and time of day Travel course Location of conduct Sex Social status Age class Pack estimate

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Coyote Behaviors Rest (ready, rest) Travel Hunting little warm blooded creatures Feeding on corpse Vigilance Howling Other

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Small Mammal Surveys Captured amid summer 1999 and 2000 3 distinct locales for 2 sessions every year Mini-frameworks caught for 4 days 5 evenings and checked twice day by day Once distinguished, the little well evolved creatures were: Toenail cut Weighed Sexed Released

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Statistics SAS Factorial (split-plot) outline Analysis of difference utilizing PROC MIXED Snow profundity was rehashed measure Sample unit was the individual coyote Proportion of time Each perception was given equivalent weight

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Statistics Variables examined included: Wolf movement Wolf nearness Sex Year

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Results From December 1997 to July 2000 we made: 1243 perceptions of coyotes 1743 h of coyote action spending plans 28 occupant coyotes from 9 packs 16 male and 12 females 24 alphas and 4 betas

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Lamar Valley Coyotes for a long time, coyotes flourished without wolves Coyote populace lessened 25 to 33% every winter 23 watched coyote mortalities Average pack estimate 3.2 (territory = 2.7-3.7) Very low enrollment (predation and parvo)

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Lamar Valley Wolves Druid Peak and Rose Creek packs brought into Lamar Valley in 1995 and 1996 Pack sizes: 7-8 grown-ups in Druid Peak 15-22 grown-ups in Rose Creek Druid Peak pack denned inside study range Wolf regions covered making "cradle zone"

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Coyote and Wolf Pack Territories Including Wolf "Cushion Zone"

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Mean Snow Depth

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Coyote Behavioral Time Budgets Before and After Reintroduction

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Coyote Behavioral Time Budgets

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Coyote Behavioral Time Budgets

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Coyote Behavioral Time Budgets

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Coyote Behavioral Time Budgets

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Coyote Behavioral Time Budgets

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Coyote Behavioral Time Budgets

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Different Levels of Wolf Activity

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Presence and Absence of Wolves

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Discussion because of wolf reintroduction coyotes have balanced their conduct: Spatially (support zone versus non-cradle zone) Temporally (show versus missing)

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How has coyote conduct changed? Increment in the measure of time bolstering on bodies Consistent with wolf recolonization in NW Montana (Arjo and Pletscher 1999) Feeding on cadavers during the time Contrasts Gese et al. (1996) Decrease in travel

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Energetic Benefits Wild coyotes require 930 g of sustenance day by day (Bekoff and Wells 1986) Coyote must expend what might as well be called: 27 mice 11 microtines 6 stash gophers 4 ground squirrels or Risking a couple of minutes nourishing on a wolf-killed cadaver

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How is conduct distinctive in the "cradle zone?" Wolf support zones: Higher deer survivorship Refuge for coyotes In YNP, coyotes between Rose Creek and Druid Peak wolf packs have: Fewer agonistic cooperations Lower death rates Different practices

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How is conduct diverse in the "cushion zone?" Coyote conduct in the cradle zone: Fed on remains less Little wolf-killed carcass accessible Rested more Vigilant Less careful about predation by wolves

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Is Behavior Different Wolf Presence? At the point when wolves were available: Fed on bodies more Wolf-slaughtered remains quite often exhibit Rested less Vigilant all the More careful about predation by wolves Most coyotes were murdered while rummaging wolf executes

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Coyote Behavior - Conclusion Coyote populace lessened Surviving coyotes balanced conduct Coyotes advantage from wolf-executed corpses Increased nourishing on bodies Increased costs: Increased watchfulness Decreased rest Higher predation hazard Impact changes spatially and transiently

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What is the master plan? Reintroduction of extensive carnivores prompts to: Numeric reaction Behavioral reaction Cascading effects

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Numeric Response to Reintroductions

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Numeric Response to Reintroductions Contrary results in prey species In NW MT, elk and deer populaces diminished No prey lessening in YNP, MN, and WI Reduction of contending carnivores Coyote populace diminished in NW MT and YNP

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Behavioral Response to Reintroduction Minimize experiences Adjust spatial and additionally fleeting use: Elk in National Elk Refuge scattered Coyotes in NW MT kept away from wolves Decrease achievement of assaulting predator Increased cautiousness

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Vigilance Aids in: Detection of predators Observation of conspecifics Food procurement Prevention of kleptoparasitism

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Environmental and Social Variables Group estimate Distance to asylum Position in the crowd Body measure Age Parenthood Habitat sort Predation weight Ecotourism

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Vigilance Conclusions Increased danger of predation results in increment in watchfulness Increase in carefulness builds the creatures security, however diminishes scrounging In GYE since wolf reintroduction: Elk, moose, and coyotes have expanded their cautiousness

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Cascading Effects In YNP, lessening of elk populace: Allow vegetation to recuperate Increase populace of contending herbivores On Isle Royale, increment in wolf populace brought about: Decrease of moose populace Recovery of resin fir

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"Behavioral Cascades" IN YNP, No diminishment of elk populace, however conduct changes: Avoiding high wolf utilize zones Aspen and willow recuperation Higher differing qualities of tune fowls Increased number of spotted frogs Recolonization of beaver

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"Behavioral Cascades" In YNP, diminish in coyote populace and conduct changes: Increase of sustaining on corpses Avoidance of high wolf utilize territories Increase in little well evolved creature thickness Increase in the quantity of badgers, weasels, and foxes

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"Behavioral Cascades": the Numeric and Behavioral Dichotomy Behavior changes may decrease wellness Increased watchfulness in elk may bring about: Reduced fat substance and lower body mass in females Lower survival rates amid the winter Calves conceived with lower weights Increased cautiousness in coyotes may bring about: Reduced survival of pups

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Conclusion Reintroduction of wolves has prompt to: Reduction of prey populaces??? Diminishment of contending flesh eater populace Change in conduct Increase in against savage practices (carefulness) Change in space utilize Ultimately, falling impacts may prompt to an expansion in biodiversity

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Acknowledgments Major Advisor: John Bissonette Eric Gese, Jim MacMahon, and Bill Adair Susan Durham for measurable conference Yellowstone Ecosystem Research Center Friends and family

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