2025

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Oosthuizen, WC, Schoombie, S, Chimienti, M, Pistorius, PA, Lowther, AD. 2025. Dive wiggles as a proxy of prey consumption in krill-feeding penguins. Journal of Experimental Marine Biology and Ecology 590:152115

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Schoombie, S, de Wet, T, Britz, S, Lowther, AD, Oosthuizen, WC. 2025. VANTAGE: An open‐source application for visualisation, navigation and analysis of video and ancillary time‐series data in bio‐logging studies. Methods in Ecology and Evolution DOI: 10.1111/2041-210X.70026

Ross, MD, Leitner, M, Oosthuizen, WC, Bester, MN, Jordaan, RK, Voysey, MD et al. 2025. Seasonal occurrence and condition of leopard seals at an extralimital Sub-Antarctic Island. Polar Biology 48:1-7.

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Altwegg, R, Salau, S, Abadi, F, Cervantes, F, Clark, AE, … Oosthuizen, WC, … et al. 2025. Emerging topics and new directions in statistical ecology. Journal of Statistical Theory and Practice19:44

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2024

Oosthuizen, WC, Christian, M, Ngwenya, M. 2024. Comment on Krüger, L: Decreasing trends of chinstrap penguin breeding colonies in a region of major and ongoing rapid environmental changes suggest population level vulnerability. Diversity 2023, 15, 327. Diversity 16: 651

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Friscourt, N, Lea, MA, Cherel, Y, Wotherspoon, S, Brewer, EA, Oosthuizen, WC, de Bruyn, PJN, Wege, M, Goebel, ME, Trathan, PN, Walters, A. 2024. Seasonal and ocean basin-scale assessment of amino acid δ15N trends in a Southern Ocean marine predator. Marine Ecology Progress Series 747:151-169.

Schoombie, S, Jeantet, L, Chimienti, M, Sutton, GJ, Pistorius, PA, Dufourq, E, Lowther, AD, Oosthuizen, WC. 2024. Identifying prey capture events of a free-ranging marine predator using bio-logger data and deep learning. Royal Society Open Science 11: 240271.

Cusick, A, Fudala, K, Storożenko, PP, Świeżewski, J, Kaleta, J, Oosthuizen, WC, Pfeifer, C, Bialik, RJ. 2024. Using machine learning to count Antarctic shag (Leucocarbo bransfieldensis) nests on images captured by Remotely Piloted Aircraft Systems. Ecological Informatics 82: 102707.

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Christian, M, Oosthuizen, WC, Bester, MN, de Bruyn, PJN. 2024. Robustly estimating the demographic contribution of immigration: Simulation, sensitivity analysis and seals. Journal of Animal Ecology 93: 632–645

McIntyre, T, Oosthuizen, WC, Bester, MN, Hindell, MA, Reisinger, RR, Tosh, CA, van den Hoff, J, de Bruyn, PJN. 2024. Tracking the foraging migrations of Marion Island southern elephant seals (Mirounga leonina) during their first year of life. Marine Mammal Science 40: e13078.

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2023

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Oosthuizen, WC, Pistorius, PA, Bester, MN, Altwegg, R, de Bruyn, PJN. 2023. Reproductive phenology is a repeatable, heritable trait linked to the timing of other life-history events in a migratory marine predator. Proceedings of the Royal Society B: Biological Sciences 290: 20231170.

Ollus, VMS, Biuw, M, Lowther, A, Fauchald P, Johannessen, DE, Martín López, LM, Gkikopoulou, KC, Oosthuizen, WC, Lindstrøm, U. 2023. Large-scale seabird community structure along oceanographic gradients in the Scotia Sea and northern Antarctic Peninsula. Frontiers in Marine Science 10: 1233820.

Jordaan, R, Oosthuizen, WC, Reisinger, RR, de Bruyn, PJN. 2023. The effect of prey abundance and fisheries on the survival, reproduction, and social structure of killer whales (Orcinus orca) at subantarctic Marion Island. Ecology and Evolution 13: e10144.

Lloyd, KJ, Oosthuizen, WC, Rotella, JJ, Bester, MN,  de Bruyn, PJN. 2023. Density-related reproductive costs and natal conditions predict male life history in a highly polygynous mammal. Animal Behaviour 200: 183-197.

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2022

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Oosthuizen, WC, Pistorius, PA, Korczak-Abshire, M, Hinke, JT, Santos, M, Lowther, AD. 2022. The foraging behavior of nonbreeding Adélie penguins in the western Antarctic Peninsula during the breeding season. Ecosphere 13: e4090 

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Johannessen, JED, Biuw, M, Lindstrøm, U, Ollus, VMS., Martín López, LM, Gkikopoulou, KC, Oosthuizen, WC, Lowther, A 2022. Intra-season variations in distribution and abundance of humpback whales in the West Antarctic Peninsula using cruise vessels as opportunistic platforms. Ecology and Evolution 12: e8571

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2021

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Oosthuizen, WC, Reisinger, RR, Bester, MN, Steinhage, D, Auel, H, Flores, H, Knust, R, Ryan, S, Bornemann, H. 2021. Spatial modelling of pack-ice seal density in the southern Weddell Sea, Antarctica. Marine Ecology Progress Series 673: 211–227

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Oosthuizen, WC, Péron, G, Pradel, R, Bester, MN, de Bruyn, PJN. 2021. Positive early-late life-history trait correlations in elephant seals. Ecology 102:e03288

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de Kock, L*, Oosthuizen, WC*, Beltran, RS, Bester, MN, de Bruyn, PJN. 2021. Determinants of moult haulout phenology and duration in southern elephant seals. Scientific Reports 11:13331.

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Jordaan, RK, Reisinger RR, Oosthuizen, WC, de Bruyn, PJN 2021. Seasonal fission and fusion of killer whale, Orcinus orca, social structure at sub-Antarctic Marion Island. Animal Behaviour 177: 223-230

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2020

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Oosthuizen, WC, Krüger, L, Jouanneau, W, Lowther, AD. 2020. Unmanned aerial vehicle (UAV) survey of the Antarctic shag (Leucocarbo bransfieldensis) breeding colony at Harmony Point, Nelson Island, South Shetland Islands. Polar Biology 43:187-191

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Vargas-Fonseca, OA, Kirkman, SP, Oosthuizen, WC, Bouveroux, T, Cockcroft, V, Conry, DS, Pistorius, PA. 2020. Abundance of Indo-Pacific bottlenose dolphins (Tursiops aduncus) along the south coast of South Africa. PLoS ONE 15:e0227085

Jordaan, RK, Oosthuizen, WC, Reisinger, RR, de Bruyn, PJN. 2020. Abundance, survival and population growth of killer whales Orcinus orca at subantarctic Marion Island. Wildlife Biology doi: 102981/wlb00732

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Walters, A, Hindell, M, Goebel, ME, Bester, MN, Trathan, PN, Oosthuizen, WC, Lea, MA. 2020. Southern Ocean isoscapes derived from a wide-ranging circumpolar marine predator, the Antarctic fur seal. Ecological Indicators 118: 106694

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Lloyd, KJ, Oosthuizen, WC, Bester, MN, de Bruyn, PJN. 2020. Trade-offs between age-related breeding improvement and survival senescence in highly polygynous elephant seals: dominant males always do better. Journal of Animal Ecology 89: 897-909

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Lloyd, KJ, Oosthuizen, WC, Fay, R, Bester, MN, de Bruyn, PJN. 2020. Selective disappearance of frail juveniles: consequences for understanding social dominance in adult male elephant seals. Oikos 129: 1566–1578

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Bester, MN, Wege, M, Oosthuizen, WC, Bornemann, H. 2020. Ross seals in the Weddell Sea: fact and fallacy. Polar Biology 43: 35-41

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2019

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Oosthuizen, WC, Postma, M, Altwegg, R, Nevoux, M, Pradel, R, Bester, MN, de Bruyn, PJN. 2019. Individual heterogeneity in life-history trade-offs with age at first reproduction in capital breeding elephant seals. Population Ecology 61:421-435

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Media coverage: Young Author Awards 2020

University of Pretoria News

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Nachtsheim, D, Ryan, S, Schröder, M, Jensen, L, Oosthuizen, WC, Bester, MN, Hagen, W, Bornemann, H. 2019. Winter foraging behaviour of Weddell seals (Leptonychotes weddellii) in the southern Weddell Sea. Progress in Oceanography 173: 165-179

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du Toit, KH, Mole, MA, Wege, M, Reisinger, RR, Oosthuizen, WC, Shihlomule, YD, Jordaan, RK, van Tonder, A, de Bruyn, PJN. 2019. Anomalous lanugo coat colourations in sub-Antarctic fur seal (Arctocephalus tropicalis) pups born on Marion Island. Polar Biology 42:1053–1057

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2018

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Oosthuizen, WC, Pradel, R, Bester, MN, de Bruyn, PJN. 2018. Making use of multiple surveys: estimating breeding probability using a multievent-robust design capture-recapture model. Ecology and Evolution 9:836-848

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Oosthuizen, WC, Altwegg, R, Nevoux, M, Bester, MN, de Bruyn, PJN. 2018. Phenotypic selection and covariation in the life‐history traits of elephant seals: heavier offspring gain a double selective advantage. Oikos 127: 875-889

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2017

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Lübcker, N, Reisinger, RR, Oosthuizen, WC, de Bruyn, PJN, van Tonder, A, Pistorius, PA, Bester, MN. 2017. Low trophic level diet of juvenile southern elephant seals Mirounga leonina from Marion Island: a stable isotope investigation using vibrissal regrowths. Marine Ecology Progress Series 577: 237–250

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2016

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Oosthuizen, WC, de Bruyn, PJN, Wege, M, Bester, MN. 2016. Geographic variation in Subantarctic fur seal pup growth: linkages with environmental variability and population density. Journal of Mammalogy 97: 347-360

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Arthur, B, Hindell, M, Bester, MN, Oosthuizen, WC, Wege, M, Lea, MA. 2016. South for the winter? Within-dive foraging effort reveals the trade-offs between divergent foraging strategies in a free-ranging predator. Functional Ecology 30: 1623–1637

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Wege, M, Etienne, M-P, Oosthuizen, WC, Reisinger, RR, Bester, MN, de Bruyn, PJN. 2016. Trend changes in sympatric Subantarctic and Antarctic fur seal pup populations at Marion Island, Southern Ocean. Marine Mammal Science 32: 960-982

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2015

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Oosthuizen, WC, Bester, MN, Altwegg, R, McIntyre, T, de Bruyn, PJN. 2015. Decomposing the variance in southern elephant seal weaning mass: partitioning environmental signals and maternal effects. Ecosphere 6: 139

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Lowther, AD, Ahonen, H, Hofmeyr, G, Oosthuizen, WC, de Bruyn, PJN, Lydersen, C, Kovacs, KM. 2015. Reliability of VHF telemetry data for measuring attendance patterns of marine predators: a comparison with time depth recorder data. Marine Ecology Progress Series 538: 249–256

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Arthur, B, Hindell, M, Bester, MN, Trathan, P, Jonsen, I, Staniland, I, Oosthuizen, WC, Wege, M, Lea, MA. 2015. Return customers: foraging site fidelity and the effect of environmental variability in wide-ranging Antarctic fur seals. PLoS ONE 10: e0120888

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2014

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Reisinger, RR, Oosthuizen, WC, Péron, G, Cory Toussaint, D, Andrews, RD, de Bruyn, PJN. 2014. Satellite tagging and biopsy sampling of killer whales at Subantarctic Marion Island: Effectiveness, immediate reactions and long-term responses. PLoS ONE 9: e111835

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2012

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Oosthuizen, WC, de Bruyn, PJN, Bester, MN. 2012. Unmarked individuals in mark-recapture studies: comparisons of marked and unmarked southern elephant seals at Marion Island. Austral Ecology 37:556-568

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2011

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Oosthuizen, WC, Bester, MN, Tosh, CA, Guinet, C, Besson, D, de Bruyn, PJN. 2011. Dispersal and dispersion of southern elephant seals in the Kerguelen Province, Southern Ocean. Antarctic Science 23: 567-577

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Bester, MN, de Bruyn, PJN, Oosthuizen, WC, Tosh, CA, McIntyre, T, Reisinger, RR, Postma, M, van der Merwe, DS, Wege, M. 2011. The Marine Mammal Programme at the Prince Edward Islands: 38 years of research. African Journal of Marine Science 33: 511-521

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Reisinger, RR, de Bruyn, PJN, Tosh, CA, Oosthuizen, WC, Mufanadzo, NT, Bester, MN. 2011. Prey and seasonal abundance of killer whales at sub-Antarctic Marion Island. African Journal of Marine Science 33: 99-105

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2010

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Oosthuizen, WC, de Bruyn, PJN, Bester, MN, Girondot, M. 2010. Cohort and tag-site-specific tag-loss rates in mark–recapture studies: A southern elephant seal cautionary case. Marine Mammal Science 26: 350-369

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de Bruyn, PJN, Cameron, EZ, Tosh, CA, Oosthuizen, WC, Reisinger, RR, Mufanadzo, NT, Phalanndwa, MV, Postma, M, Wege, M, van der Merwe, DS, Bester, MN. 2010. Prevalence of allosuckling behaviour in Subantarctic fur seal pups. Mammalian Biology 75: 555-560

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2009

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Oosthuizen, WC, de Bruyn, PJN. 2009. Isabelline king penguin (Aptenodytes patagonicus) at Marion Island. Marine Ornithology 37: 267-268

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Oosthuizen, WC, Dyer, BM, de Bruyn, PJN. 2009. Vagrant birds ashore at the Prince Edward Islands, southern Indian Ocean, from 1987 – 2009. African Journal of Marine Science 31: 445-450

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Oosthuizen, WC, Bester, MN, de Bruyn, PJN, Hofmeyr, GJG. 2009 Intra-archipelago moult dispersion of southern elephant seals at the Prince Edward Islands, southern Indian Ocean. African Journal of Marine Science 31: 457-462

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Oosthuizen, WC, de Bruyn, PJN. 2009. King penguin brooding and defending a sub-Antarctic skua chick. Polar Biology 32:303-305

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Oosthuizen, WC, Cross, PC, Bowers, JA, Hay, C, Ebinger, MR, Buss, P, Hofmeyr, M, Cameron, EZ. 2009. Effects of chemical immobilization on survival of African buffalo in the Kruger National Park. Journal of Wildlife Management 73: 149-153

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de Bruyn, PJN, Tosh, CA, Oosthuizen, WC, Bester, MN, Arnould, JPY. 2009. Bathymetry and frontal system interactions influence seasonal foraging movements of lactating subantarctic fur seals from Marion Island. Marine Ecology Progress Series 394: 263-276

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de Bruyn, PJN, Bester, MN, Carlini, AR,  Oosthuizen, WC. 2009. How to weigh an elephant seal with one finger: a simple three-dimensional photogrammetric application. Aquatic Biology 5: 31-39

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2008

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de Bruyn, PJN, Tosh, CA, Oosthuizen, WC, Phalanndwa, MV, Bester MN. 2008. Temporary marking of unweaned southern elephant seal (Mirounga leonina L) pups. South African Journal of Wildlife Research 38: 133-137