Adrian Aebischer

Attributes of natal habitat often affect early stages of natal dispersal. Thus, environmental gradients at mountain slopes are expected to result in gradients of dispersal behavior and to drive elevational differences in dispersal distances and settlement behavior. However, covariation of environmental factors across elevational gradients complicat...

Calls for urgent action to conserve biodiversity under global change are increasing, and conservation of migratory species in this context poses special challenges. In the last two decades the Convention on the Conservation of Migratory Species of Wild Animals (CMS) has provided a framework for several subsidiary instruments including action plans...

A book with a lot of pictures and informations about the success of Red Kite Conservation in Europe.

The joint effects of interacting environmental factors on key demographic parameters can exacerbate or mitigate the separate factors’ effects on population dynamics. Given ongoing changes in climate and land use, assessing interactions between weather and food availability on reproductive performance is crucial to understand and forecast population...

Reich illustriertes Porträt des farbenprächtigen Greifvogels. Mit neuesten Erkenntnissen zu den Bestandesveränderungen der letzten Jahre. Der farbenprächtige Rotmilan mit seinem eleganten Flug gehört zu den beliebtesten Greifvögeln. Aber kaum ein anderer Greifvogel hat in den vergangenen Jahrzehnten in Europa derart ausgeprägte Bestandsveränderung...

In the original publication of the article, the linear discriminate Eq. (1) was mistyped. We provide below the correct equation to use to discriminate male and female in Ivory Gull Pagophila eburnea (Phipps, 1774).

The ongoing decline of sea ice threatens many Arctic taxa, including the ivory gull. Understanding how ice-edges and ice concentrations influence the distribution of the endangered ivory gulls is a prerequisite to the implementation of adequate conservation strategies. From 2007 to 2013, we used satellite transmitters to monitor the movements of 10...

Additional Methods and Results on Gilg et al., 2016. Living on the edge of a shrinking habitat: the ivory gull, Pagophila eburnea, an endangered sea-ice specialist. Biol. Lett. 12: 20160277. http://dx.doi.org/10.1098/rsbl.2016.0277

Sex identification of birds is relevant to studies of evolutionary biology and ecology and is often a central issue for the management and conservation of populations. The Ivory Gull Pagophila eburnea (Phipps, 1774) is a rare high-Arctic species whose main habitat is sea ice throughout the year. This species is currently listed Near Threatened by t...

Species may cope with rapid habitat changes by distribution shifts or adaptation to new conditions. A common feature of these responses is that they depend on how the process of dispersal connects populations, both demographically and genetically. We analyzed the genetic structure of a near-threatened high-Arctic seabird, the ivory gull (Pagophila...

Ross’s Gull is one of the most emblematic Arctic birds and least known seabirds in the world; postbreeding movements and the use of sea-ice habitats have been long debated, but described only from scattered observations. We tracked two adults, a male and female, breeding in the Kolyma Delta, Russia, using the lightest (<5 g) satellite transmitters...

Living on the edge of a shrinking habitat%3A the ivory gull, Pagophila eburnea, an endangered sea-ice specialist

Living on the edge of a shrinking habitat%3A the ivory gull, Pagophila eburnea, an endangered sea-ice specialist

Ross’s Gull is one of the most emblematic Arctic birds and least known seabirds in the world; postbreeding movements and the use of sea-ice habitats have been long debated, but described only from scattered observations. We tracked two adults, a male and female, breeding in the Kolyma Delta, Russia, using the lightest (\5 g) satellite transmitters...

Upon leaving their natal area, dispersers are confronted with unknown terrains. Species-specific perceptual ranges (i.e. the maximum distance from which an individual can perceive landscape features) play a crucial role in spatial movement decisions during such wanderings. In nocturnal animals that rely on vision, perceptual range is dramatically e...

Natural catastrophic events such as heavy rainfall and windstorms may induce drastic decreases in breeding success of animal populations. We report the impacts of summer rainfalls on the reproductive success of ivory gull (Pagophila eburnea) in north-east Greenland. On two occasions, at Amdrup Land in July 2009 and at Station Nord in July 2011, we...

The Long-tailed Skua (Stercorarius longicaudus) is a specialist predator of lemmings during the summer and hence an important component of the tundra ecosystems, but most of its life cycle takes place offshore and remains largely unknown outside of the breeding season. Using 9.5-g solar-powered satellite transmitters, we were able to document for t...

We report 22 new polymorphic microsatellites for the Ivory gull (Pagophila eburnea), and we describe how they can be efficiently co-amplified using multiplexed polymerase chain reactions. In addition, we report DNA concentration, amplification success, rates of genotyping errors and the number of genotyping repetitions required to obtain reliable d...

The post-breeding movements of three northeast Atlantic populations (north Greenland, Svalbard and Franz Josef Land) of the ivory gull Pagophila eburnea, a threatened high-Arctic sea-ice specialist, were studied between July and December 2007 using 31 satellite transmitters. After leaving their breeding grounds, all birds first dispersed eastward i...

The modern anthropized landscape is a major source of hazards for large animals such as raptors. Collisions with cables, vehicles and trains, as well as electrocution cause casualties, which may negatively impact populations. Yet, demographic studies of that impact remain scarce, which is an impediment to evidence-based conservation action. We stud...

Although juvenile dispersal is an important life history component, it remains one of the less understood ecological processes regulating the dynamics of animal populations. Lack of information about patterns of dispersal hampers the estimation of the actual status and demographic trajectory of populations, and can preclude the development of sound...

The ivory gull, a rare high-Arctic species whose main habitat throughout the year is sea ice, is currently listed in Greenland as ‘Vulnerable’, and as ‘Endangered’ in Canada, where the population declined by 80% in 20 years. Despite this great concern, the status of the species in Greenland has been largely unknown as it breeds in remote areas and...

Female sea turtles typically lay several clutches during each nesting season and rest in the time between laying clutches (the internesting period) in the waters off the nesting beach. Adequate protection of turtles in the internesting area requires knowledge on their spatial behaviour and was so far hampered by methodological limitations. Satellit...

Sea turtle populations worldwide suffer from reduced survival of immatures and adults due to fishery bycatch. Unfortunately, information about the whereabouts of turtles outside the breeding habitat is scarce in most areas, hampering the development of spatially explicit conservation plans. In the Mediterranean, recoveries of adult females flipper-...

The Makgadikgadi Salt Pans in Botswana are one of the most important breeding sites in southern Africa ....

The Makgadikgadi Salt Pans in Botswana are one of the most important breeding sites in southern Africa for lesser flamingos Phoeniconaias minor and greater flamingos Phoenicopterus ruber roseus. Much of flamingo migration behaviour is unknown and there has been speculation on the pattern of flamingo movements to and from Makgadikgadi and their disp...

The female White Stork «Max». equipped with a transmitter in July 1999 in Switzerland, overwintered until April 2000 in Morocco and Algeria and stayed from May to August in central Spain: then overwintered in Algeria and in 2001 spent two summer months in the future breeding grounds in southern Germany: after overwintering in Morocco it returned to...

We investigated how territory quality, settlement date and morphometry affected several components of yearly breeding success of a Swiss population of Savi's Warblers Locustella luscinioides. Territories occupied by males differed from unoccupied sites of similar size and location by having higher and denser reeds, a more extensive straw litter, an...

In 1992, a census of the breeding population of Savi's Warbler in Switzerland was carried out. About 90% of the Swiss population occurs at Lake Neuchatel. During the breeding period, the species was found at 19 different sites apart from the southern shore of Lake Neuchatel. However, breeding was presumed at only 10 sites. The Swiss population cons...

Enthält versch. Sonderdr. Diss. rer. nat. Freiburg/Schweiz. Literaturverz. Université, Fribourg