A5012215662- Avian ecology and behavior
- Marine and fisheries research
- Marine animal studies overview
- Genetic diversity and population structure
- Species Distribution and Climate Change
- Genomics and Phylogenetic Studies
- Animal Behavior and Reproduction
- Marine and coastal plant biology
- Isotope Analysis in Ecology
- Animal Vocal Communication and Behavior
- Fish Ecology and Management Studies
- Plant and animal studies
- Agriculture and Rural Development Research
- Biomimetic flight and propulsion mechanisms
- Polar Research and Ecology
- Wildlife Ecology and Conservation
- Coral and Marine Ecosystems Studies
- Paleontology and Evolutionary Biology
- Neurobiology and Insect Physiology Research
- Identification and Quantification in Food
- Physiological and biochemical adaptations
- Indigenous Studies and Ecology
- Livestock and Poultry Management
- Crustacean biology and ecology
- Bird parasitology and diseases
Royal Society for the Protection of Birds
2018-2024
University of Cape Town
2018-2021
Google (United States)
2021
Charles Darwin Foundation
2007-2008
Charles Darwin University
2008
Technologie- und Förderzentrum
2008
Fachhochschule Kiel
2007
Institute for New Media
2003
Global forage-fish landings are increasing, with potentially grave consequences for marine ecosystems. Predators of forage fish may be influenced by this harvest, but the nature these effects is contentious. Experimental fishery manipulations offer best solution to quantify population-level impacts, rare. We used Bayesian inference examine changes in chick survival, body condition and population growth rate endangered African penguins Spheniscus demersus response 8 years alternating...
Significance Penguins have long been of interest to scientists and the general public, but their evolutionary history remains unresolved. Using genomes, we investigated drivers penguin diversification. We found that crown-group penguins diverged in early Miocene Australia/New Zealand identified Aptenodytes (emperor king penguins) as sister group all other extant penguins. first occupied temperate environments then radiated cold Antarctic waters. The Circumpolar Current’s (ACC)...
Abstract Understanding the functional relationship between marine predators and their prey is vital to inform ecosystem‐based management. However, collecting concurrent data on predator behaviour at relevant scales challenging. Moreover, opportunities study these relationships in absence of industrial fishing are extremely rare. We took advantage an experimental fisheries closure how local abundance influences foraging success chick condition Endangered African penguins Spheniscus demersus...
Humboldt penguins Spheniscus humboldti in captivity and free-living Magellanic S. magellanicus were fitted with loggers to determine beak angles during breathing. The also masks for determining rates of air flow During periods higher gas exchange requirement, opened their beaks inspiration, where tidal volume was linearly correlated both change angle maximum angle, closed them slightly the final stages inspiration finally expiration. Substantial differences apparent between individuals....
Since at least the middle-Miocene, Antarctic Polar Front (APF) and Subtropical (STF) appear to have been main drivers of diversification marine biota in Southern Ocean. However, highly migratory birds mammals challenge this paradigm importance oceanographic barriers. Eudyptes penguins range from Peninsula subantarctic islands some southernmost subtropical islands. Because recent diversification, number species remains uncertain. Here we analyze two mtDNA (HVRI, COI) nuclear (ODC, AK1)...
The Magellanic penguin Spheniscus magellanicus is a top predator and major consumer of marine resources in the Patagonian Continental Shelf worldwide. It most migratory penguins, but until recently, its migration route was only partially known. Our aims with regard to breeding on Isla Quiroga, Argentina, were: 1) compare distribution during winter period between sexes 2) case that habitat segregated, evaluate possible proximate causes like competitive exclusion and/or specialization. In...
Abstract Remote oceanic islands harbour unique biodiversity, especially of species that rely on the marine trophic resources around their breeding islands. Identifying areas used by such is essential to manage and limit processes threaten these species. The Tristan da Cunha territory in South Atlantic Ocean hosts several endemic globally threatened seabirds, pinnipeds; how they use waters surrounding must be considered when planning commercial activities. To inform management Exclusive...
Abstract The African penguin population has declined precipitously in recent decades, and if current rates of decline persist, this species could become extinct the wild by 2035. Resource extraction small pelagic fish prey purse-seine fishery around breeding colonies been identified as a demographically meaningful threat to penguins. Consequently, long-term, effective no-take zones have endorsed an expert panel scientists constituted South government. Here, we consider six largest that...
Flightlessness in previously volant birds is taxonomically widespread and thought to occur when the costs of having a functional flight apparatus outweigh benefits. Loss ability fly relaxes body mass constraints which can be particularly advantageous divers, because underwater performance correlates with mass. The Galápagos Cormorant Phalacrocorax harrisi flightless largest its 27‐member genus. Here, loss flight, consequent reduced foraging range, could compensated by enhanced dive...
Anthropogenic climate change is resulting in spatial redistributions of many species. We assessed the potential effects on an abundant and widely distributed group diving birds, Eudyptes penguins, which are main avian consumers Southern Ocean terms biomass consumption. Despite their abundance, several these species have undergone population declines over past century, potentially due to changing oceanography prey availability important winter months. used light-based geolocation tracking...
ESR Endangered Species Research Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 4:105-112 (2008) - DOI: https://doi.org/10.3354/esr00046 Space use by foraging Galápagos penguins during chick rearing Antje Steinfurth1,3,*, F. Hernan Vargas2,3,6, Rory P. Wilson4, Michael Spindler5, David W. Macdonald2 1Research and Technology Centre (FTZ), University of Kiel, Hafentörn, 25761 Büsum, Germany...
Rockhopper penguins are delimited as 2 species, the northern rockhopper (Eudyptes moseleyi) and southern chrysocome), with latter comprising subspecies, western chrysocome chrysocome) eastern filholi). We conducted a phylogeographic study using multilocus data from 114 individuals sampled across 12 colonies entire range of northern/southern complex to assess potential population structure, gene flow, species limits. Bayesian likelihood methods nuclear mitochondrial DNA, including model...
Abstract Aim Delimiting recently diverged species is challenging. During speciation, genetic differentiation may be distributed unevenly across the genome, as different genomic regions can subject to selective pressures and evolutionary histories. Reliance on limited numbers of markers that underpowered make delimitation even more challenging, potentially resulting in taxonomic inconsistencies. Rockhopper penguins genus Eudyptes comprise three broadly recognized taxa: northern ( E. moseleyi...
ESR Endangered Species Research Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 39:293-302 (2019) - DOI: https://doi.org/10.3354/esr00970 Sexual and geographic dimorphism in northern rockhopper penguins breeding South Atlantic Ocean Antje Steinfurth1,2,*,**, Jenny M. Booth3,**, Jeff White4, Alexander L. Bond5,6, Christopher D. McQuaid3 1FitzPatrick Institute of African Ornithology, DST/NRF Centre...
The designation of Marine Protected Areas has become an important approach to conserving marine ecosystems that relies on robust information the spatial distribution biodiversity. We used GPS tracking data identify Important Bird and Biodiversity (IBAs) for Endangered northern rockhopper penguin Eudyptes moseleyi within Exclusive Economic Zone (EEZ) Tristan da Cunha in South Atlantic. Penguins were tracked throughout their breeding season from 3 4 main islands group. Foraging trips remained...