Buscar
Mostrando ítems 41-50 de 208
Do blood parasites infect Magellanic penguins (Spheniscus magellanicus) in the wild? Prospective investigation and climatogeographic considerations
(Cambridge University Press, 2017-04)
Magellanic penguins (Spheniscus magellanicus) are native to Argentina, Chile and the Falkland Islands. Magellanic penguins are highly susceptible to blood parasites such as the mosquito-borne Plasmodium spp., which have ...
Physiological toolkit to assess the health impacts on a Magellanic Penguin Spheniscus Magellanicus colony in a high-use touristic region of Patagonia, Argentina
(Pacific Seabird Group, 2019-09)
We evaluated the health status of Magellanic Penguins Spheniscus magellanicus inhabiting a region on the Valdes Peninsula (Patagonia, Argentina) that is subject to extensive tourism. We compared individuals nesting along ...
Feather mercury levels in beached Magellanic penguin (Spheniscus magellanicus) in northern Argentina during the non-breeding season
(Springer Heidelberg, 2021-11)
Mercury (Hg) is a great concern for marine environments. Bird feathers have been widely used to assess Hg pollution. In this study, we determine mercury concentrations in body feathers of juvenile Magellanic penguins ...
An experimental approach to the brood reduction hypothesis in Magellanic penguins
(Wiley Blackwell Publishing, Inc, 2017-08-07)
In many bird species, eggs in a brood hatch within days of each other, leading to a size asymmetry detrimental to younger siblings. Hatching asynchrony is often thought of as an adaptive strategy, and the most widely studied ...
Sex-specific costs of rearing a nestling and its implications in the brood sex ratio of Magellanic penguins
(Springer, 2021-08)
In birds, possible explanations for a bias in brood sex ratio include differential cost of rearing nestlings of different sexes, and different parental fitness returns related to offspring sex. We studied brood sex ratio ...
Post-moult movements of sympatrically breeding Humboldt and Magellanic Penguins in south-central Chile
(Elsevier, 2016-07)
Ten Humboldt (Spheniscus humboldti) and eight Magellanic Penguins (S. magellanicus) were successfully equipped with satellite transmitters in March 2009 on Islotes Puñihuil in central south-Chile to follow their post-moult ...
At-sea distribution, movements and diving behavior of Magellanic penguins reflect small-scale changes in oceanographic conditions around the colony
(Springer, 2022-01)
Penguins are highly specialized divers that are expected to reflect environmental variation by adjusting their foraging behavior. We performed a comprehensive analysis of the at-sea distribution, diving, and foraging ...
Mortality of a juvenile Magellanic penguin (Spheniscus magellanicus, Spheniscidae) associated with the ingestion of a PFF-2 protective mask during the Covid-19 pandemic
(2021)
We report the discovery of a dead Magellanic penguin (Spheniscus magellanicus) found on Juquehy Beach (23°46′S 45°44′W), municipality of São Sebastião, Brazil, on September 9th 2020. Following necropsy, we noted the presence ...
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 ...
Isotopic niche plasticity in a marine top predator as indicator of a large marine ecosystem food web status
(Elsevier Science, 2021-07)
As marine ecosystems are harvested or modified by anthropogenic or natural factors, there is an increasing demand for indicators of trophic web health or status. The Magellanic Penguin (Spheniscus magellanicus) is a widely ...