Yellow-Legged Gull (Larus michahellis) Telemetry Study with GPS-GSM Transmitters

For a long-term monitoring and detailed risk assessment of the movements of seagulls at Odayeri Solid Waste Landfill Area (SWLA) after being closed and İstanbul New Airport Site on the basis of flight safety, transmitters have been attached to the seagulls. In addition transmitters, wing tags and standard metal rings have also been attached to the birds.

The study carried out in Odayeri Sanitary Landfill Site from 20/11/2017 to 30/11/2017 was carried out by İGA Wildlife Management Unit and expert taggers. After making all preparations for the first 6 days, 94 birds in total were caught with whoosh net from 26th to 30th of November 2017.

Ninety four individuals have been tagged with metal rings (left tarsus). Their biometrical measurements, i.e., wing and tarsus lengths, BI – Bill Length, HE - Total Head Length (Bill+Head), weights, and their ages (1st, 2nd, 3rd winter, and adult) have been recorded.

On November 26 and 27 2017, 49 birds in total were tagged with white and red wing tags (1:T, 2:T,....,50:T) with 1 letter-1/2 number code (with colon mark between them). Besides, GPS-GSM trackers and metal ring (left Tarsus) were attached to 8 individuals the biometrical measurements of which are suitable.

As for the research deliverables, the movements of the seagulls that use Odayeri SWLA and the project site in the region, their behaviors after closure of Odayeri SWLA, and the situations that may pose a risk for the airport have been examined comprehensively through GPS-GSM transmitters.

According to the first location information coming from the yellow-legged gulls, it has been found out that they have visited Sultangazi, Sisli, Kadikoy, Agacli koyu coast, Gokturk/Kemerburgaz, Yesilkoy, Omerli Baraji, Komurcuoda, and Odayeri landfill sites, except for two individuals that have gone to Bursa/Nilufer and Crete Island/Greece.