Data from: Inter-colony variation in foraging flight characteristics of black-headed gulls Chroicocephalus ridibundus during the incubating period
Jakubas, Dariusz et al. (2020), Data from: Inter-colony variation in foraging flight characteristics of black-headed gulls Chroicocephalus ridibundus during the incubating period, Dryad, Dataset, https://doi.org/10.5061/dryad.q83bk3jfg
To characterize flights of black-headed gulls breeding in three colonies located across Central and Northern Poland during the incubation period, we used 18 PinPoint-10 GPS store-on-board loggers (1.3 g, Lotek Wireless Inc.) recording time and position. In total, we deployed loggers on one pair member from 37 nests (10 at Bydgoszcz, 16 at Koronowo and 11 at Przykona). We captured birds on nests during the 2nd-4th week of the incubation period using spring traps or loops made of nylon lines.
Loggers were programmed to collect data at 15 min intervals and were used in 2018: 10-26 May at Bydgoszcz, 28 April - 23 May at Koronowo, and 19-31 May at Przykona. After about 48 h from logger deployment we tried to recapture birds and retrieve tags. We successfully recaptured 36 (97.3%) marked birds.
A foraging trip was defined as a trip with at least three positions recorded with a minimum distance of 1 km from the colony. We analysed only flights performed during day hours (4:00-23:00), as some individuals from Bydgoszcz colony were regularly spending nights on the roofs of buildings in the city centre and returning to the colony during the daylight hours.
See more details in the file Read_me.txt
Narodowe Centrum Nauki, Award: 2015/19/B/NZ8/01981