Auflistung JLUdocs nach Autor "Eens, Marcel"
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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 ... -
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 ... -
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 ... -
Limited individual phenotypic plasticity in the timing of and investment into egg laying in southern rockhopper penguins under climate change
Dehnhard, Nina; Eens, Marcel; Demongin, Laurent; Quillfeldt, Petra; Suri, Dan; Poisbleau, Maud (2015)Global climate change requires species to adapt to increasing environmental variability, rising air and ocean temperatures and many other effects, including temperature-associated phenological shifts. Species may adapt to ... -
Two eggs, two different constraints: a potential explanation for the puzzling intraclutch egg size dimorphism in Eudyptes penguins
Poisbleau, Maud; Dehnhard, Nina; Demongin, Laurent; Quillfeldt, Petra; Eens, Marcel (2015)Phenotypic plasticity and phenotypic stability are major components of the adaptive evolution of organisms to environmental variation. The invariant two-egg clutch size of Eudyptes penguins has recently been proposed to ...