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Taking a tern for the worse?

Photo: Martin Renner. Taking a tern for the worse?. When do we raise a red flag for O. aleuticus ?. Photo: Martin Renner. Contributors. Synergistic: H. Renner, M. Romano, N. Rojek , M. Goldstein, S. Pyare , J. Frederick, M. Renner, R. Gill. Data contributors:.

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Taking a tern for the worse?

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  1. Photo: Martin Renner Taking a tern for the worse? When do we raise a red flag for O. aleuticus?

  2. Photo: Martin Renner Contributors Synergistic: H. Renner, M. Romano, N. Rojek, M. Goldstein, S. Pyare, J. Frederick, M. Renner, R. Gill Data contributors: Gulf of Alaska: S. Oehlers, E. Cooper, N. Catterson, M. Kissling, K. Kuletz, M. Renner, C. Field Kodiak: R. Corcoran, R. MacIntosh, S. Stephensen Chukchi Sea: R. Meyers, T. Moran, M. Johnson, S. Georgette Aleutian Islands: I. Helmericks, Attours, J. Puschock, M. Schwitters, L. Spitler, J. Williams, D. Rudis Bering Sea: B. McCaffery, S. Savage, M. Swaim, R. MacDonald, A. Harding, K. Sowl, C. Gales, A. Kholsa, S. Minton, J. Schwarz

  3. Aleutian tern fast facts • What’s in a name? Photo: Martin Renner

  4. Aleutian tern fast facts Distribution Colony characteristics Wintering location Info gaps Photo: Martin Renner

  5. Worldwide distribution Distribution map from BirdLife International / IUCN

  6. Historic distribution in Alaska Historic distribution in Alaska

  7. Photo: Martin Renner Why are so few studying Aleutian terns?

  8. Photos by Jeff Frederick A big exception – USFS/UAS study • Geolocators • Census methods

  9. Gulf of Alaska Historic colonies (pre-1995) Yakutat Copper River Delta Kachemak Bay

  10. Gulf of Alaska Red shows recent counts Yakutat Copper River Delta Kachemak Bay

  11. Yakutat Area Black Sand Spit Colony

  12. Kodiak Historic colonies (pre-1995) Photo: Robin Corcoran / USFWS

  13. Kodiak Kodiak Red shows recent counts Red shows recent counts Photo: Robin Corcoran / USFWS Photo: Robin Corcoran / USFWS

  14. Aleutian Islands-Bering-Chukchi Historic colonies (pre-1995)

  15. Aleutian Islands-Bering-Chukchi Red shows recent counts

  16. Historic and recent Aleutian Tern colony counts Excluding areas not censused since 1995, mostly Bering Sea and Controller Bay *Yakutat accounts for 80% of Gulf of AK and 54% of AK total

  17. Current statewide status 85% decline!

  18. So what’s up? Photo: Martin Renner

  19. Status in Russia Koryak Upland SW Kamchatka Peninsula Sakhalin Island

  20. Aleutian Tern At-Sea Observations Data from North Pacific Pelagic Seabird Database Map /interpolation by M. Renner

  21. Anomaly in at-sea observations by decade Data from NPPSD Map by M. Renner

  22. Compare to Arctic tern • Breeding grounds • Wintering grounds • Both apparently declining in AK Photo: Martin Renner

  23. Photo: Jeff Frederick Photo: Martin Renner

  24. Conclusions *Some evidence for 85% decline statewide Lots of caveats on the data Apparently increasing in Russia *Single statewide coast survey could answer many Q’s *Need for multi-agency support Photo: Martin Renner

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