Chris Oosthuizen
@ChrisOosthuizn
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Marine predator ecologist and Research Fellow at the University of Cape Town. Interested in Southern Ocean seabirds & seals.
South Africa
Joined March 2021
Video abstract and lay summary of our paper quantifying Antarctic krill prey captures by chinstrap penguins Funded by @AntarcticFund. Led by Stefan Schoombie with @JeantetLorene @MariannaKimient @g_sutn @mapru_nmmu @Seal_Botherer @SEEC_UCT @NITheCS.
royalsocietypublishing.org
Marine predators are integral to the functioning of marine ecosystems, and their consumption requirements should be integrated into ecosystem-based management policies. However, estimating prey...
Thanks to innovations in technology that have allowed for ever more powerful remote monitoring, our understanding of their foraging behaviour has rapidly grown during the last decades. - 💻 @UCT_News @SEEC_UCT/ @AIMS/ @mandelaUni.#ScienceAndTech
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Incredible footage of northern elephant seals where they are most at home: at a depth of 645 m. Congratulations @FrouinMouy and team!.
Calling All Seal Enthusiasts! Following my presentation at WILDLABS Variety Hour last week, I'm now excited to announce that our paper has been published. Interested in the deep-sea behaviors of northern elephant seals? 🦭 Dive in: .@WILDLABSNET
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The CNN and V-net predictions were validated by animal-borne video data, in collaboration with @SEEC_UCT @JeantetLorene @MariannaKimient @g_sutn @mapru_nmmu @EmmanuelDufourq @Seal_Botherer @NITheCS. A lay summary, published in Nature Africa,👉.
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We developed a method that uses deep learning to identify chinstrap penguin prey captures from accelerometer and depth biologging data. The paper with reproducible analysis code, led by Stefan Schoombie, is available at Funding through @AntarcticFund
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Our recent @marionseals83 paper on IPMs and seals, led by Murray Christian, is the topic of an @AnimalEcology ««Research Highlights»» paper (thank you, @chloe_nater). Both papers (+ reproducible analysis code) feature in this edition of J. Anim. Ecol.
besjournals.onlinelibrary.wiley.com
This in-depth study considers the contribution of immigration to population growth, when immigration is estimated indirectly in an integrated population model. The authors demonstrate the importance...
«Once upon a time, I fell in love with a sorcerer…» Academically, that is 💌🧙♂️. I had the pleasure of writing a «Research Highlight» for @AnimalEcology for a fantastic paper on integrated models, black magic (Gaussian processes), and @marionseals83:.
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All data and code are available - please see the paper for details and @marionseals83 for more about our work at Marion Island. @UPTuks @ResearchUP @SEEC_UCT.
besjournals.onlinelibrary.wiley.com
This in-depth study considers the contribution of immigration to population growth, when immigration is estimated indirectly in an integrated population model. The authors demonstrate the importance...
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Our results suggest that female dispersal and connectivity between distant populations (Marion, Kerguelen and Crozet archipelagos), along with increased adult survival, were the main drivers responsible for the rebound of the Marion Island elephant seal population since the 1990s
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The analysis contains several points of interest for methods-oriented researchers: using Stan and Gaussian Process priors to fit the IPM; and using an iterative fitting procedure that dramatically reduce model-fitting times, facilitating the use of more complex/realistic models
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We sought to understand the demographic drivers of a rebounding southern elephant seal population on Marion Island using the IPM–tLTRE models. More generally, we explore how simulation and sensitivity analyses can help evaluate the robustness of conclusions from IPM–tLTRE models
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🆕Published today, our new @marionseals83 IPM/t-LTRE elephant seal paper, superbly led by Murray Christian. The paper uses Gaussian Process priors to provide ‘local’ regularisation while estimating the contribution of immigration to population dynamics
besjournals.onlinelibrary.wiley.com
This in-depth study considers the contribution of immigration to population growth, when immigration is estimated indirectly in an integrated population model. The authors demonstrate the importance...
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RT @ryan_reisinger: "Biogeography of the southern Indian Ocean higher predator community".Funded INSPIRE PhD project @unisouthampton @Ocean….
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🚨Want to do a postdoc in Cape Town? 🇿🇦 Interested in Statistical Ecology or experience with machine learning applications in ecology? Univ. of Cape Town postdoc fellowships accepted until 15 September. If interested, please reach out @SEEC_UCT @BioSciUCT .
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Thank you to the many contributors, including coauthors, field assistants, reviewers and funding bodies. @NRF_News @marionseals83.
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Our 30-year study (3) revealed mother-daughter similarities in breeding phenology; (4) indicated high individual consistency of arrival date within females; (5) found no strong relationship between breeding phenology and measures of environmental variation.
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Our 30-year study (1) highlights strong relationships between the timing of different parts of the annual cycle (moult and breeding phenology); (2) shows associations between breeding arrival dates and individual traits (wean date as a pup, age and breeding experience); (cont. )
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Our new paper in @RSocPublishing identifies the factors that correlate with shifts in reproductive phenology within- and between female elephant seals @SEEC_UCT @ResAltwegg @marionseals83 @UPTuks @mapru_nmmu @MandelaUni @UCT_news
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📢Only a few days left to apply for this 2-year postdoc position in Cape Town 🇿🇦. We're looking for someone to build Integrated Pop. Models to explore the value of conservation measures for African penguins 🐧 @rbsherley @ResAltwegg @SANCCOB @SEEC_UCT
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RT @Glennwithtwons: Fantastic biodiversity, and amazing outdoor lifestyle, collaborating on cutting edge NASA-funded remote sensing project….
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RT @EmmanuelDufourq: ⚠️ @oaggimenez gave a fantastic talk at @ISEC_stats_ecol but the ending slides on mental health was the 🍒on the 🎂. So….
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