Penguins
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Recent papers in Penguins
Thermoregulation could represent a signicant 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 behaviour,... more
Chinstrap and Adeíie penguins generate considerable pressures to propel their faeces away from the edge of the nest. The pressures involved can be approximated if the following parameters are known: (1) distance the faecal material... more
Valuing objects is a distinctive human trait. It is necessary for rational behaviour. Factors that are likely to influence valuations, the difficulties of getting agreements about valuations and the limited perspective of economics as a... more
It is suggested that valuing objects is a distinctive human trait. It is a prerequisite for rational behaviour. Factors that are likely to influence valuations, the difficulties of getting agreements about valuations and the limited... more
This article updates a paper which I wrote in 1988 about the economic value of biodiversity conservation on the Otago Peninsula and the scope for expanding wildlife tourism there. After outlining different ways to measure the economic... more
The modern zoo has brought about two major advances in the behavioral welfare of their exhibited animals: (a) The use of environmental enrichment to promote naturalistic behaviors and (b) the use of training to improve voluntary husbandry... more
We developed a Hidden Markov mark–recapture model (R package marked) to examine sex‐specific demography in Magellanic Penguins (Spheniscus magellanicus). Our model was based on 33 yr of resightings at Punta Tombo, Argentina, where we... more
Penguins are considered among the most popular animals for zoo and aquarium visitors to observe. Swimming is considered a desirable activity, both for the visitor experience and the welfare of the penguins. However, little is known about... more
1. Nonlinear, parametric curve-fitting provides a framework for understanding diverse ecological and evolutionary trends (e.g. growth patterns and seasonal cycles). Currently, parametric curve-fitting requires a priori assumptions of... more
Many birds can visualise parts of the ultraviolet (UV) range; consequently, the diversity of colours observed by birds is generally greater than humans can perceive. The colouration of feathers is diverse both between and within bird... more
Híd folyóirat, 2017/január-február, 113-129. o.
Improving husbandry parameters of Bird of Paradise, utilizing state of the art medical equipment to evaluate the health of the Little Penguins and employing aviculture techniques developed at the Bronx Zoo to augment field research are... more
The penguins (Aves: Sphenisciformes) are the most derived group of diving seabirds. Exclusive to the Southern Hemisphere, ten of the seventeen extant species can be found in South America. South America has been recognised as one of the... more
The present review aims to improve the scope and coverage of the phylogenetic matrices currently in use, as well as explore some aspects of the relationships among Paleogene penguins, using two key skeletal elements, the humerus and... more
A comparison between the Paleogene and Neogene marine assemblages in South America suggests a major turnover among penguins by the late Miocene, with the disappearance of the stem Sphenisciformes and the rise of the modern penguins.... more
Land-breeding marine animals such as penguins, flying seabirds and pinnipeds are important components of marine ecosystems, and their abundance has been used extensively as an indication of ecosystem status and change. Until recently,... more
During the last decade, new Neogene fossil assemblages from South America have revealed important clues about the evolution of seabird faunas in one of the major upwelling systems of the world: the Humboldt Current. However, most of this... more
Sustainability has emerged as an important field of research with an emphasis on studying tourism impacts and defining the limits of growth in tourism. However, the conceptual foundation of sustainability and the limits to growth have... more
A group of zoo-housed little penguins (Eudyptula minor) was diagnosed with mycobacteriosis. While undergoing multidetector computed tomography (MDCT) imaging for an unrelated research project, pulmonary lesions were detected in multiple... more
No-take zones may protect populations of targeted marine species and restore the integrity of marine ecosystems, but it is unclear whether they benefit top predators that rely on mobile pelagic fish. In South Africa, foraging effort of... more
Se presentan los primeros restos diagnósticos asignables a Spheniscus megaramphus procedentes del Miembro Bonebed de la Formación Bahía Inglesa (Mioceno tardío), consistentes en tres rostros aislados pertenecientes a la colección del... more
Sex-biased mortality can increase the risk of extinction of threatened populations. Numbers of the Endangered African penguins Spheniscus demersus are decreasing rapidly and the smaller size of females associated with their higher... more