Kalinka Rexer-Huber Graham Parker Paul Sagar David Thompson
Transcript of Kalinka Rexer-Huber Graham Parker Paul Sagar David Thompson
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Kalinka Rexer-Huber
Graham Parker
Paul Sagar
David Thompson
June 2021
Salvin’s albatross nest cameras
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Scope
Phenology of Salvin’s albatross
• Fledging dates, adult departure and return
• Nest success
• Timing/outcome from tracking data?
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Analyses
368 d
18,291 images
for Salvin’s
50 new 2019–20 nests
74 nests visible at deploy
40 nests (3 cams) followed
to end breeding
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end of brood-guard (date chick first left unattended)
fledging (date chick departed nest)
failure
last colony departure (date last adult and/or fledgling visible at
the end of the season)
first colony return (date first bird seen back in colony)
colony reoccupied (date adults staying in colony)
Hatch = end brood - mean
27 d brood-guard
Lay = end brood - mean
73 d incubation and mean
27 d brood-guard
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Breeding success
Chick success Incub success
Breeding success
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Results
N=70 nests(40 visible whole time)
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Can phenology and success data be drawn from tracking datasets via migration dates?
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Mean dept 6 March
(a month before fledge)
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Mean dept 10 Jan
(1.5mo after mean fail)
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Recommendations
For breeding success, need full breeding season
from lay to fledge
• deploy in July with cameras left in place until after April
• OR two deployments, changing batteries and memory
without changing the camera field of view (if island visits
partway through breeding e.g. October)
Disturbance by fur seals
• Cams mounted under overhanging rock, >2 ft high to
prevent passing disturbance
• OR more cameras to counter expected data loss
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Acknowledgements
Funding: DOC
Initial data acquisition by NIWA supported by
DOC CSP, Murihiku, Evohe team
Field and tech support: Matt Charteris,
Samhita Bose, Dana Briscoe