In less than a month, a new field season will start in Ammarnäs and Slettnes! We are all excited to get up there during what will be the last field season within my PhD project on the long-distance migration of Arctic seabirds, but hopefully/probably not the last one ever.
In Slettnes, our aim is to continue the work from previous years: retrap Arctic Skuas with geolocators and monitor their breeding activities. The geolocator tagging has revealed extreme migrations across the Atlantic and we are currently working on publishing these results. Very exciting stuff! Hence, we are hoping for a good breeding year, allowing us (Hans, Ingrid and me) to increase our sample size some more by recapturing many tagged individuals.
We have been concerned about the apparent large decline of the Arctic Skua colony over the past two decades (see this handout). Our hypothesisis is that the skuas suffer from the combined effects of an apparently bad food situation for seabirds and predation pressure by Red Foxes on the Arctic Skuas. Foxes do not only feed on skua eggs, but even manage to take adults, as was shown last year by a Red Fox photographed while holding a dead Arctic Skua (carrying a geolocator) presumably to its den. To better document the activities and prey spectrum of foxes, we will bring some camera traps that we plan to deploy at fox dens.
In Ammarnäs, Tim van der Meer, Christian Hoefs, Morrison Pot and Peter Antkowiak and others will take care of the work. They are preparing themselves for a busy year, as a lemming ‘increase-year’ is expected. This means lemming numbers are growing but not yet peaking. Lemmings were virtually absent during the last two years, causing Long-tailed Skuas to skip breeding. This year, skuas are expected to breed and the team will try to find as many nests, read colour-rings, and recapture birds with geolocators, as they can.
Otherwise, some interesting side-projects will be ran: Tim and Christian have the ambitions to start a study on Dotterel – a species so beautiful it is almost a miracle, and with an interesting migration. In addition, we are taking part in two circumpolar initiatives: one on migration of Dunlin (meaning some more geolocators should be retrieved) and the other on Arctic food web interactions (with nest predation of waders as a central theme).