363lo lectura] [Modo de compatibilidad]) · 2019-09-10 · Jairo Isaa Matos*, Gerson Féliz*, José...
Transcript of 363lo lectura] [Modo de compatibilidad]) · 2019-09-10 · Jairo Isaa Matos*, Gerson Féliz*, José...
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Discovery of a new
Black-capped Petrel
(Pterodroma hasitata)
nesting location in Haiti.
Ernst Rupp*, Esteban Garrido*,
Jairo Isaa Matos*, Gerson Féliz*, José Luis Castillo*,
Jim Goetz**, John Gerwin***
*Grupo Jaragua,
**Cornell Lab of Ornithology,
***NC Museum of Natural Sciences
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Black-capped Petrel status
• Historically abundant in Greater & Lesser Antillies
• Extirpated from Lesser Antiles in 1800’s.
• Nesting known now only on Hispaniola.
• Main threats: habitat destruction, introduced mammals• Main threats: habitat destruction, introduced mammals
• Population estimate: ~ 2000 breeding pairs.
• IUCN Redlist status: endangered
• Urgent need for study of distribution & basic breeding
ecology
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Current confirmed and potential breeding areas
confirmed BCPE nesting potential BCPE nesting
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Nesting Habitat at National Park La Visite, Haiti
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Nesting Habitat at National Park Macaya, Haiti
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Nesting Habitat at Loma del Toro, Dominican Republic
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Investigations on Hispaniola:
2008-2011
Objectives
•Confirm presence of petrels in historic areas
•Conduct initial evaluation of threats to petrels
Methods
•Survey historic sites
•Search for and monitor nests
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Results of Surveys 2008-2010Ecology
•Distribution & Abundance
• ~ 90% of population at La Visite
• ~ 5% each at Loma del Toro & Macaya
• need much better tools to determine abundance
•Find nests – yes, but difficult
ThreatsThreats
• Habitat loss – expansion of agriculture and pasture, fires
• Introduced mammals - rats, cats, dogs, pigs, mongoose
• Communication towers - Chiefly at Loma del Toro
People (mainly at National Park La Visite)
• Lack of economic alternatives – no basic or enviro education
• Poverty cycle – Hurricanes and earthquake make it worse
• Lack of resources – natural, human, and financial
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Results of Nest Searching & Monitoring
Three nests found on Morne Vincent, Haiti
Nest 1
At the back of a small long cave, 1m high and 8m deep.
Nest 2Nest 2
In a ravine, in a 0.5 m deep limestone crevice.
Nest 3
In the same ravine, close to nest 2, also in a 0.5 m deep
limestone crevice.
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Entrance to cave containing Nest 1
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Limestone crevice containing Nest 2
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Cronology for nest 2 and 3
Nest 2:
March 13: Brooding Adult
April 23: Eggshells, but no chick
Nest 3:Nest 3:
April 23: Remnants of eggshells with unhatched
chick
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Nest 2: Remains of eggshell
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Nest 3: Remains of egshell and unhatched chick
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Nest Monitoring Methods
• Monitored parental activity and chick growth at Nest 1
• Used Reconyx HC 500 camera trap
• Monitored 93 nights from 19 March - 21 June
• Recorded 37 Adult visits• Recorded 37 Adult visits
• Monitoring continues
• The two adults can be distinguished by color of neck
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Nest Monitoring Results
Adult arrival time at nest
• Range = 21:00-03:00h
• ~85% between 21:00 - 2400h
Duration of adult nest visits
• Range = 30-246 minutes
• ~ 80% ≤ 80 minutes• ~ 80% ≤ 80 minutes
Duration between adult nest visits
• Range = 1-8 nights
• ~ 70% ≤ 2 nights
•Count of visits/night
• 1 vist on 29 nights,
• 2 visits on 8 nights.
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Bird A entering the nest
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Bird A leaving the nest
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Bird B entering the nest
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Bird B leaving the nest
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Cronology of Nest 1
March 3: Brooding adult
March 13: Brooding adult
April 2: Small chick (~ size of baseball)
April 24: Chick somewhat bigger April 24: Chick somewhat bigger
May 14: Chick still downy (~ ½ size of soccer ball)
June 21: Chick with feathers, near fully grown
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3 March - brooding adult
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2 April - Chick ~ size of a baseball
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2 April - Chick is size of large grapefruit
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14 May - chick still in downy feathers
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24 June - Chick nearly full grown
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13 March - Rat nearly full grown
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24 May - Dog, fully grown
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Future Work
Distribution & Abundance
• Continue surveys to investigate distribution.
• Use advanced methods: radar, infra-red imaging,
satellite transmitters.
Breeding ecology
• Search for and monitor natural nests
• Create and monitor artificial nests• Create and monitor artificial nests
• Study & mitigate impact of mammalian predators
Work with communities
• Study community use and of habitat and knowledge of
petrels.
• Engage communities to conserve natural resources.
• Create conservation incentives, potentially with
payment for ecosystem services
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Working with communities
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Agradecimientos (Acknowledgments)
Fondos (Funds)
• USFWS, Cornell Laboratorio de Ornithología,
MacArthur Foundation, BirdLife, SEO, GJI.
Colaboradores (Collaborators)
• Hispaniola: GJI, SEMARENA, SAH, SOH, Fondation
Seguin.Seguin.
• USA: Cornell Lab of O., VCE, NCMNS
Trabajo de campo (Fieldwork)
• A. Abellard, J. Almonte, J. Hart, A. Jean, M.
Landestoy, E. Louis-Jean, T. Mejia., René Jeune,
Evanita Sanon, Djeff Alexis