Rob van Bemmelen
@robvanbemmelen.bsky.social
Dad, birder, sound recorder, ecologist mainly studying (North Sea) seabirds, tracking terns, skuas and phalaropes.
And: thin black vertical line along the bill base. Nice bird!
March 11, 2025 at 7:31 PM
And: thin black vertical line along the bill base. Nice bird!
...past. These visited platforms could be prioritized when surveying platforms for breeding kittiwakes. 6/6 @waardenburgeco.bsky.social @sovonvogels.bsky.social
March 5, 2025 at 10:30 AM
...past. These visited platforms could be prioritized when surveying platforms for breeding kittiwakes. 6/6 @waardenburgeco.bsky.social @sovonvogels.bsky.social
...in June in the Dutch sector of the North Sea, based on aerial surveys. It remains unclear what part of these breed on platforms. Our tagged kittiwakes visited several (up to 7) other platforms, including platforms where breeding has been observed in the... 5/6
March 5, 2025 at 10:30 AM
...in June in the Dutch sector of the North Sea, based on aerial surveys. It remains unclear what part of these breed on platforms. Our tagged kittiwakes visited several (up to 7) other platforms, including platforms where breeding has been observed in the... 5/6
...habitat for the species -- our only breeding kittiwakes are those on platforms. The first report of breeding on platforms stems from 2000. There is very scant information on breeding numbers since then. For the past six years, up to several 10 000s kittiwakes were estimated to be present... 4/6
March 5, 2025 at 10:30 AM
...habitat for the species -- our only breeding kittiwakes are those on platforms. The first report of breeding on platforms stems from 2000. There is very scant information on breeding numbers since then. For the past six years, up to several 10 000s kittiwakes were estimated to be present... 4/6
...changed temporally. There was a sudden drop in distances about a week after tagging, which we interpreted as the start of the chick-phase. Then, distances increased during chick-rearing and dropped again during the post-fledging period. In the Netherlands, we don't have natural breeding... 3/6
March 5, 2025 at 10:30 AM
...changed temporally. There was a sudden drop in distances about a week after tagging, which we interpreted as the start of the chick-phase. Then, distances increased during chick-rearing and dropped again during the post-fledging period. In the Netherlands, we don't have natural breeding... 3/6
...colonies of the same size. We suggest this is because they can venture in all directions and therefore have reduced density-dependence around the colony compared to coastal colonies that have less access to sea area. With data well into September, we could show how max trip distances... 2/6
March 5, 2025 at 10:30 AM
...colonies of the same size. We suggest this is because they can venture in all directions and therefore have reduced density-dependence around the colony compared to coastal colonies that have less access to sea area. With data well into September, we could show how max trip distances... 2/6
... positively impacting the performance of the parents in the subsequent breeding season, leading to improved young survival prospects. 3/3
February 14, 2025 at 3:49 PM
... positively impacting the performance of the parents in the subsequent breeding season, leading to improved young survival prospects. 3/3
Interestingly, models also indicated an increased young survival following an El Niño winter. We suggest this time-lagged effect reflects downstream propagation of environmental conditions, particularly food availability, or a potential carry-over effect of El Niño conditions... 2/3
February 14, 2025 at 3:49 PM
Interestingly, models also indicated an increased young survival following an El Niño winter. We suggest this time-lagged effect reflects downstream propagation of environmental conditions, particularly food availability, or a potential carry-over effect of El Niño conditions... 2/3
... in wintering areas, with birds from single breeding sites wintering in areas across the Atlantic (see movementecologyjournal.biomedcentral.com/articles/10....). We found that which and how much organochlorine contaminants are present in Arctic Skua blood depends on the wintering area. 2/2
February 14, 2025 at 3:44 PM
... in wintering areas, with birds from single breeding sites wintering in areas across the Atlantic (see movementecologyjournal.biomedcentral.com/articles/10....). We found that which and how much organochlorine contaminants are present in Arctic Skua blood depends on the wintering area. 2/2