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

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Presentation transcript:

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

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

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

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

Worldwide distribution Distribution map from BirdLife International / IUCN

Historic distribution in Alaska

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

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

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

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

pres. through early June, abandoned by early July, no est (early abandonment, no successful breeding) birds in mind June, no presence after mid June Black Sand Spit Colony Yakutat Area

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

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

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

Aleutian Islands- Bering-Chukchi Red shows recent counts

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 Recent count% totalchange since 1995 Chukchi Sea221-83% Bering Sea % Aleutian Islands % Kodiak % Gulf of AK1649*65-77% Total %

Current statewide status 85% decline!

Photo: Martin Renner So what’s up?

Status in Russia Sakhalin Island SW Kamchatka Peninsula Koryak Upland

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

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

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

Photo: Jeff Frederick

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