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Intersexual differences in the diving behaviour of imperial cormorants
(Springer, 2011-05-18)
Intersexual differences in the foraging behaviour have been examined in several seabird species, especially those exhibiting sexual size dimorphism. We studied intersex behavioural differences in the Imperial Cormorant ...
Buoyed up and slowed down: Speed limits for diving birds in shallow water
(Inter-Research, 2010-03)
In air-breathing animals, the time and energy costs of each dive are primarily determined by depth-related upthrust, swim speed and temperature. While studies have previously investigated how animals should optimise their ...
Dive depth and plumage air in wettable birds: the extraordinary case of the imperial cormorant
(Inter-Research, 2007-12)
Cormorants are considered to be remarkably efficient divers and hunters. In part, this is due to their wettable plumage with little associated air, which allows them to dive with fewer energetic costs associated with ...
Foraging behaviour of Magellanic Penguins during the early chick-rearing period at Isla de los Estados, Argentina
(Wiley Blackwell Publishing, Inc, 2018-04-14)
Studies of the at-sea distribution and trophic ecology of penguins are essential to understand their role in the broader marine food web. Magellanic Penguins Spheniscus magellanicus have a wide distribution and their ...
Cold birds under pressure: Can thermal substitution ease heat loss in diving penguins?
(Springer, 2016-02)
Thermoregulation could represent a significant fraction of the total energy budget of endotherms under unfavourable environmental conditions. This cost affects several traits of the ecology of an organism such as its ...
Comparative foraging behaviour of sympatric Humboldt and Magellanic Penguins reveals species-specific and sex-specific strategies
(Csiro Publishing, 2013-05)
How closely related marine organisms mitigate competition for resources while foraging at sea is not well understood, particularly the relative importance of interspecific and intraspecific mitigation strategies. Using ...
Exceptional foraging plasticity in King Penguins (Aptenodytes patagonicus) from a recently established breeding site in Tierra del Fuego, Chile
(Elsevier, 2021-06-05)
Animals constantly test the borders of their own ecological niche and tend to expand their range, which is now additionally challenged by global climate change. Following human exploitation throughout the Southern Ocean ...
Phylogenetic relationships of the Early Miocene diving and flightless duck Cayaoa bruneti (Aves, Anatidae) from Patagonia: homology or convergence?
(Wiley-Blackwell Publishing Ltd, 2019-11)
Cayaoa bruneti, from the early Miocene Gaiman Formation of Chubut, Argentina, provides the earliest evidence for diving behaviour and the earliest example of flight loss within Anseriformes. It is also the only known diving ...
Foraging behaviour and feeding locations of Rock Shags Phalacrocorax magellanicus from a colony in Patagonia, Argentina
(Wiley Blackwell Publishing, Inc, 2008-06)
During 1996 and 1997, foraging Rock Shags Phalacrocorax magellanicus were studied at Punta Loma, Argentina using radio‐transmitters deployed on ten adult shags during the chick‐rearing period. Rock Shags undertook 2.6 ± ...
Flexible paddle sheds new light on speed: A novel method for the remote measurement of swim speed in aquatic animals
(Inter-Research Science Center, 2008-12)
Speed is a key determinant of energy expenditure in free-living animals, and particularly in marine vertebrates, where power requirements for swimming increase as a cubed function of the speed. However, current devices ...