whale migration: when, where and why bruna favetta
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WHALE MIGRATION: WHEN, WHERE AND WHY
BRUNA FAVETTA
BALEEN WHALES
Long-distance migration
Winter in low-latitude areas
Summer in high-latitude areas
Migration stress
QUESTION
How does long-distance migration optimize whale survival?
Change over time?
Identify primary calving and feeding regions
What are the shortest paths between these regions?
DEFINING SUITABLE HABITAT
Ocean water temperature (approximated by sea surface temperature)
Ocean depth
Zooplankton density
Endangered species: critical habitat boundaries
Climate change
Garrison, L.P. 2005
CALVING REGION
TEMPERATURE FOR CALVING
COBAL - Carbon, Ocean Biogeochemistry and Lower Trophics modelby Charles Stock, John Dunne, Jasmin John; GFDLAnnual average
TEMPERATURE DISTRIBUTION
N=33
FOCUS ON EACH?
N=20N=13
DEPTH FOR CALVING
COBAL - Carbon, Ocean Biogeochemistry and Lower Trophics modelby Charles Stock, John Dunne, Jasmin John; GFDLAnnual average
DEPTH DISTRIBUTION
N=33
FEEDING REGION
ZOOPLANKTON AVAILABILITY
COBAL - Carbon, Ocean Biogeochemistry and Lower Trophics modelby Charles Stock, John Dunne, Jasmin John; GFDLAnnual average
ZOOPLANKTON DISTRIBUTION
N=34
TEMPERATURE FOR FEEDING
COBAL - Carbon, Ocean Biogeochemistry and Lower Trophics modelby Charles Stock, John Dunne, Jasmin John; GFDLAnnual average
TEMPERATURE DISTRIBUTION
N=34
CRITICAL HABITAT
Feeding region
Calving region
NEXT STEPS
Define the shortest migratory paths between the critical habitat regions
Cluster these into major migratory routes
THINGS TO CONSIDER
All of the months averaged or use only the months whales are spotted there. The second gives more well-defined ranges.
Determining migratory path: whale behavior instead of the simple shortest distance.
Make projections using future sea surface temperatures
THANK YOU!
QUESTIONS?
ACKNOWLEDGEMENTS
James Watson
Jorge Sarmiento & lab
Princeton Environmental Institute