Intraclutch Egg-Size Variation in Magellanic Penguins [PDF]
The Condor, 2005 Abstract We investigated patterns and consequences of intraclutch egg-size variation in Magellanic Penguins (Spheniscus magellanicus). First-laid eggs were significantly larger than second-laid eggs, although the mean difference represented only 2% of an average egg's volume. The degree of intraclutch egg-size variation was similar among
Nicole E. Rafferty +2 more
openaire +2 more sources
Feather-Loss Disorder in African and Magellanic Penguins
Waterbirds, 2010 Abstract. A feather-loss disorder, first observed in captive African Penguin (Spheniscus demersus) chicks in a South African rehabilitation center in 2006, was found one year later in wild Magellanic Penguin (Spheniscus magellanicus) chicks in four colonies in Argentina. Two years later, it was found in African Penguin chicks in the wild.
Kane, Olivia J. +6 more
openaire +4 more sources
From mammals back to birds: Host-switch of the acanthocephalan Corynosoma australe from pinnipeds to the Magellanic penguin Spheniscus magellanicus. [PDF]
PLoS ONE, 2017 Trophically-transmitted parasites are regularly exposed to potential new hosts through food web interactions. Successful colonization, or switching, to novel hosts, occur readily when 'donor' and 'target' hosts are phylogenetically related, whereas ...
Jesús Servando Hernández-Orts +6 more
doaj +2 more sources
Climate change increases reproductive failure in Magellanic penguins. [PDF]
PLoS ONE, 2014 Climate change is causing more frequent and intense storms, and climate models predict this trend will continue, potentially affecting wildlife populations. Since 1960 the number of days with >20 mm of rain increased near Punta Tombo, Argentina.
P Dee Boersma, Ginger A Rebstock
doaj +4 more sources
Multidrug-resistant Klebsiella pneumoniae ST70 harboring bla NDM in a migratory Penguin [PDF]
Scientific ReportsThe growing prevalence of antimicrobial resistance poses a global threat to human and animal health. In this study, we investigated the occurrence and genetic basis of antimicrobial resistance in a Magellanic Penguin (Spheniscus magellanicus) rescued off
Sandryelle Merces Freire +7 more
doaj +2 more sources
Outbreak of avian malaria associated to multiple species of Plasmodium in magellanic penguins undergoing rehabilitation in southern Brazil. [PDF]
PLoS ONE, 2014 Avian malaria is a mosquito-borne disease caused by Plasmodium spp. Avian plasmodia are recognized conservation-threatening pathogens due to their potential to cause severe epizootics when introduced to bird populations with which they did not co-evolve.
Ralph Eric Thijl Vanstreels +9 more
doaj +3 more sources
Population regulation in Magellanic penguins: what determines changes in colony size? [PDF]
PLoS ONE, 2015 Seabirds are often studied at individual colonies, but the confounding effects of emigration and mortality processes in open populations may lead to inappropriate conclusions on the mechanisms underlying population changes. Magellanic penguin (Spheniscus
Luciana M Pozzi +3 more
doaj +2 more sources
Penguins exploit tidal currents for efficient navigation and opportunistic foraging. [PDF]
PLoS BiologyAnimals navigating in fluid environments often face forces from wind or water currents that challenge travel efficiency and route accuracy. We investigated how 27 Magellanic penguins (Spheniscus magellanicus) adapt their navigation strategies to return ...
Richard M Gunner +6 more
doaj +2 more sources
Ultrastructural aspects of the tongue in Magellanic Penguins Spheniscus magellanicus (Forster, 1781)
Acta Scientiarum: Biological Sciences, 2014 The tongue of birds presents diversified morphologic characteristics, related directly their feeding habits and may be adapted to food capture. Penguins of the Spheniscidae family are pelagic birds that are totally adapted to the marine environment. The
Juliana Plácido Guimarães +3 more
doaj +3 more sources
How much is too much? Assessment of prey consumption by Magellanic penguins in Patagonian colonies. [PDF]
PLoS ONE, 2012 Penguins are major consumers in the southern oceans although quantification of this has been problematic. One suggestion proposes the use of points of inflection in diving profiles ('wiggles') for this, a method that has been validated for the estimation
Juan E Sala +2 more
doaj +3 more sources