Browsing by Author "Quillfeldt, Petra"
Now showing items 21-40 of 62
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Effects of severe rains on the mortality of Southern Rockhopper Penguin (Eudyptes chrysocome) chicks and its impact on breeding success
Demongin, Laurent; Poisbleau, Maud; Strange, Ian J.; Quillfeldt, Petra (2010) -
Evaluating the impact of handling and logger attachment on foraging parameters and physiology in southern rockhopper penguins
Ludynia, Katrin; Dehnhard, Nina; Poisbleau, Maud; Demongin, Laurent; Masello, Juan F.; Quillfeldt, Petra (2012)Logger technology has revolutionised our knowledge of the behaviour and physiology of free-living animals but handling and logger attachments may have negative effects on the behaviour of the animals and their welfare. We ... -
Experimental manipulation of cavity temperature produces differential effects on parasite abundances in blue tit nests at two different latitudes
Castaño-Vázquez, Francisco; Schumm, Yvonne R.; Bentele, Anna; Quillfeldt, Petra; Merino, Santiago (2021)Although different predictive models forecast that climate change will alter the distribution and incidence of parasitic diseases, few studies have investigated how microclimatic changes may affect host-parasite relationships. ... -
Female-specific colouration, carotenoids and reproductive investment in a dichromatic species, the upland goose Chloephaga picta leucoptera
Gladbach, Anja; Gladbach, David Joachim; Kempenaers, Bart; Quillfeldt, Petra (2010-11-01)Although studies on the evolution and function of female ornaments have become more numerous in the last years, the majority of these studies were carried out in cases where female ornaments were a smaller and duller version ... -
First record of Leach’s storm petrel Oceanodroma leucorhoa for King George Island, South Shetlands, Antarctica
Hahn, Steffen; Quillfeldt, Petra (1998) -
Flexible foraging behaviour of a sexually dimorphic seabird: large males do not always dive deep
Quillfeldt, Petra; Schroff, Simone; Noordwijk, Hendrika J. van; Michalik, Andreas; Ludynia, Katrin; Masello, Juan F. (2011)Sex differences in foraging behaviour have been explained by size dimorphism and/or avoidance of inter-sexual competition for depletable resources. To distinguish between these 2 hypotheses, we examined how intrinsic factors ... -
Full House: The Burrowing Parrots of Patagonia
Masello, Juan F.; Sommer, Christina; Quillfeldt, Petra (2006) -
Geographical variation in egg size dimorphism in rockhopper penguins
Demongin, Laurent; Poisbleau, Maud; Rey, Andrea Raya; Schiavini, Adrian; Quillfeldt, Petra; Eens, Marcel; Strange, Ian J. (2010)All crested penguins present a unique reversed hatching asynchrony: the larger second-laid egg (B-egg) hatches before the smaller first-laid egg (A-egg). Although both eggs often hatch, the A-chick generally dies of ... -
Good days, bad days: wind as a driver of foraging success in a flightless seabird, the southern rockhopper penguin
Dehnhard, Nina; Ludynia, Katrin; Poisbleau, Maud; Demongin, Laurent; Quillfeldt, Petra (2013)Due to their restricted foraging range, flightless seabirds are ideal models to study the short-term variability in foraging success in response to environmentally driven food availability. Wind can be a driver of upwelling ... -
Half a world apart? Overlap in nonbreeding distributions of Atlantic and Indian Ocean thin-billed prions
Quillfeldt, Petra; Cherel, Yves; Masello, Juan F.; Delord, Karine; McGill, Rona A. R.; Furness, Robert W.; Moodley, Yoshan; Weimerskirch, Henri (2015)Distant populations of animals may share their non-breeding grounds or migrate to distinct areas, and this may have important consequences for population differentiation and dynamics. Small burrow-nesting seabirds provide ... -
Hemosporidian blood parasites in seabirds - a comparative genetic study of species from Antarctic to tropical habitats
Quillfeldt, Petra; Martínez, Javier; Hennicke, Janos; Ludynia, Katrin; Gladbach, Anja; Masello, Juan F.; Riou, Samuel; Merino, Santiago (2010)Whereas some bird species are heavily affected by blood parasites in the wild, others reportedly are not. Seabirds, in particular, are often free from blood parasites, even in the presence of potential vectors. By means ... -
Hidden dichromatism in the Burrowing Parrot (Cyanoliseus patagonus) as revealed by spectrometric colour analysis
Masello, Juan F.; Lubjuhn, Thomas; Quillfeldt, Petra (2009)Bird colour perception differs fundamentally from that of humans. Birds have more cone types in the retina, including UV or violet cones, which enable them to perceive a wider spectral range. Thus, human colour perception ... -
High-coverage genomes to elucidate the evolution of penguins
Pan, Hailin; Cole, Theresa L; Bi, Xupeng; Fang, Miaoquan; Zhou, Chengran; Yang, Zhengtao; Ksepka, Daniel T; Hart, Tom; Bouzat, Juan L; Argilla, Lisa S; Bertelsen, Mads F; Boersma, P Dee; Bost, Charles-André; Cherel, Yves; Dann, Peter; Fiddaman, Steven R; Howard, Pauline; Labuschagne, Kim; Mattern, Thomas; Miller, Gary; Parker, Patricia; Phillips, Richard A; Quillfeldt, Petra; Ryan, Peter G; Taylor, Helen; Thompson, David R; Young, Melanie J; Ellegaard, Martin R; Gilbert, M Thomas P; Sinding, Mikkel-Holger S; Pacheco, George; Shepherd, Lara D; Tennyson, Alan J D; Grosser, Stefanie; Kay, Emily; Nupen, Lisa J; Ellenberg, Ursula; Houston, David M; Reeve, Andrew Hart; Johnson, Kathryn; Masello, Juan F; Stracke, Thomas; McKinlay, Bruce; Borboroglu, Pablo García; Zhang, De-Xing; Zhang, Guojie (2019-09-01)Background: Penguins (Sphenisciformes) are a remarkable order of flightless wing-propelled diving seabirds distributed widely across the southern hemisphere. They share a volant common ancestor with Procellariiformes close ... -
House mouse colonization patterns on the sub-Antarctic Kerguelen Archipelago suggest singular primary invasions and resilience against re-invasion
Hardouin, Emilie A.; Chapuis, Jean-Louis; Stevens, Mark I.; van Vuuren, Jansen Bettine; Quillfeldt, Petra; Scavetta, Rick J.; Teschke, Meike; Tautz, Diethard (2010)Background: Starting from Western Europe, the house mouse (Mus musculus domesticus) has spread across the globe in historic times. However, most oceanic islands were colonized by mice only within the past 300 years. This ... -
How animals distribute themselves in space: energy landscapes of Antarctic avian predators
Masello, Juan F.; Barbosa, Andres; Kato, Akiko; Mattern, Thomas; Medeiros, Renata; Stockdale, Jennifer E.; Kümmel, Marc N.; Bustamante, Paco; Belliure, Josabel; Benzal, Jesús; Colominas-Ciuró, Roger; Menéndez-Blázquez, Javier; Grieß, Sven; Goesmann, Alexander; Symondson, William O. C.; Quillfeldt, Petra (2021)Background: Energy landscapes provide an approach to the mechanistic basis of spatial ecology and decision-making in animals. This is based on the quantification of the variation in the energy costs of movements through a ... -
Important At-Sea Areas of Colonial Breeding Marine Predators on the Southern Patagonian Shelf
Baylis, Alastair M M; Tierney, Megan; Orben, Rachael A; Warwick-Evans, Victoria; Wakefield, Ewan; Grecian, W James; Trathan, Phil; Reisinger, Ryan; Ratcliffe, Norman; Croxall, John; Campioni, Letizia; Catry, Paulo; Crofts, Sarah; Boersma, P Dee; Galimberti, Filippo; Granadeiro, José P; Handley, Jonathan; Hayes, Sean; Hedd, April; Masello, Juan F; Montevecchi, William A; Pütz, Klemens; Quillfeldt, Petra; Rebstock, Ginger A; Sanvito, Simona; Staniland, Iain J; Brickle, Paul (2019-06-11)The Patagonian Shelf Large Marine Ecosystem supports high levels of biodiversity and endemism and is one of the most productive marine ecosystems in the world. Despite the important role marine predators play in structuring ... -
Individual consistency and phenotypic plasticity in rockhopper penguins: female but not male body mass links environmental conditions to reproductive investment
Dehnhard, Nina; Eens, Marcel; Demongin, Laurent; Quillfeldt, Petra; Poisbleau, Maud (2015)In marine habitats, increasing ocean temperatures due to global climate change may distinctly reduce nutrient and consequently food availability for seabirds. Food availability is a known driver of body mass and reproductive ... -
Influence of Species-Specific Feeding Ecology on Mercury Concentrations in Seabirds Breeding on the Chatham Islands, New Zealand
Thébault, Justine; Bustamante, Paco; Massaro, Melanie; Taylor, Graeme; Quillfeldt, Petra (2021-02-01)Mercury (Hg) is a toxic metal that accumulates in organisms and biomagnifies along food webs; hence, long-lived predators such as seabirds are at risk as a result of high Hg bioaccumulation. Seabirds have been widely used ... -
Is individual consistency in body mass and reproductive decisions linked to individual specialization in foraging behavior in a long-lived seabird?
Dehnhard, Nina; Eens, Marcel; Sturaro, Nicolas; Lepoint, Gilles; Demongin, Laurent; Quillfeldt, Petra; Poisbleau, Maud (2016)Individual specialization in diet or foraging behavior within apparently generalist populations has been described for many species, especially in polar and temperate marine environments, where resource distribution is ... -
Isolation of tetranucleotide microsatellite loci in the burrowing parrot (Cyanoliseus patagonus)
Klauke, Nadine; Masello, Juan F.; Quillfeldt, Petra; Segelbacher, Gernot (2009)We isolated seven novel polymorphic microsatellite DNA loci from the burrowing parrot (Cyanoliseus patagonus) and optimised them for future studies of population differentiation and genetic variation. The loci were screened ...