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Browsing Research Articles (Mammal Research Institute) by UP Author "De Bruyn, P.J. Nico"
Now showing items 1-20 of 66
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Reisinger, Ryan Rudolf; De Bruyn, P.J. Nico; Bester, Marthan Nieuwoudt (Inter-Research, 2011-05-05)Killer whales Orcinus orca are apex predators known to have important effects on marine ecosystems. A fundamental step towards understanding their role in ecosystems, and vital for their informed management and conservation, ...
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Jordaan, Rowan Keith; Oosthuizen, Wessel Christiaan; Reisinger, Ryan Rudolf; De Bruyn, P.J. Nico (Nordic Council for Wildlife Research, 2020)Killer whales, Orcinus orca, are a cosmopolitan species with large ecological and demographic variation across populations. Population-specific demographic studies are, therefore, crucial in accurately assessing the status ...
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Postma, Martin; Bester, Marthan Nieuwoudt; De Bruyn, P.J. Nico (Springer, 2013-05)Life history theory predicts a change in reproduction success with age as energy resources are limited and must be allocated effectively to maximise reproduction and survival. In this study we use three reproductive ...
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Harcourt, Rob; Sequeira, Ana M.M.; Zhang, Xuelei; Roquet, Fabien; Komatsu, Kosei; Heupel, Michelle; McMahon, Clive Reginald; Whoriskey, Fred; Meekan, Mark; Carroll, Gemma; Brodie, Stephanie; Simpfendorfer, Colin; Hindell, Mark; Jonsen, Ian; Costa, Daniel P.; Block, Barbara; Muelbert, Monica; Woodward, Bill; Weise, Mike; Aarestrup, Kim; Biuw, Martin; Boehme, Lars; Bograd, Steven J.; Cazau, Dorian; Charrassin, Jean-Benoit; Cooke, Steven J.; Cowley, Paul; De Bruyn, P.J. Nico; Du Dot, Tiphaine Jeanniard; Duarte, Carlos; Eguíluz, Víctor M.; Ferreira, Luciana C.; Fernández-Gracia, Juan; Goetz, Kimberly; Goto, Yusuke; Guinet, Christophe; Hammill, Mike; Hays, Graeme C.; Hazen, Elliott L.; Huckstadt, Luis A.; Huveneers, Charlie; Iverson, Sara; Jaaman, Saifullah Arifin; Kittiwattanawong, Kongkiat; Kovacs, Kit M.; Lydersen, Christian; Moltmann, Tim; Naruoka, Masaru; Phillips, Lachlan; Picard, Baptiste; Queiroz, Nuno; Reverdin, Gilles; Sato, Katsufumi; Sims, David W.; Thorstad, Eva B.; Thums, Michele; Treasure, Anne; Trites, Andrew W.; Williams, Guy D.; Yonehara, Yoshinari; Fedak, Mike A. (Frontiers Media, 2019-06)Animal telemetry is a powerful tool for observing marine animals and the physical environments that they inhabit, from coastal and continental shelf ecosystems to polar seas and open oceans. Satellite-linked biologgers ...
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Reisinger, Ryan Rudolf; De Bruyn, P.J. Nico; Pistorius, Pierre Anton; Bester, Marthan Nieuwoudt (Springer, 2010-04)We report two observations of adult male Antarctic fur seals, Arctocephalus gazella, preying on large octopods at subAntarctic Marion Island during July and August 2008. If Antarctic fur seals take cephalopods ...
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Voysey, Michael D.; De Bruyn, P.J. Nico; Davies, Andrew B. (Wiley, 2023-10)Megaherbivores perform vital ecosystem engineering roles, and have their last remaining stronghold in Africa. Of Africa's remaining megaherbivores, the common hippopotamus (Hippopotamus amphibius) has received the least ...
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Travers, Toby; Van den Hoff, John; Lea, Mary-Anne; Carlyon, Kris; Reisinger, Ryan Rudolf; De Bruyn, P.J. Nico; Morrice, Margie (Springer, 2018-11)Occurrences of killer whales (Orcinus orca) in the waters surrounding Sub-Antarctic Macquarie Island have been recorded since the 1820s; however, their presence only became the focus of scientific research in the mid-1990s. ...
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Lubcker, Nico; Whiteman, John P.; Newsome, Seth D.; Millar, Robert P.; De Bruyn, P.J. Nico (Oxford University Press, 2020-07)Please read abstract in the article.
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Wege, Mia; Tosh, Cheryl A.; De Bruyn, P.J. Nico; Bester, Marthan Nieuwoudt (Inter-Research, 2016-07)Marine top-predators show fidelity to foraging areas with predictable high-quality food patches. Areas of predictable prey yield are of conservation importance and telemetry data aid in identifying such areas. This study ...
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Oosthuizen, Wessel Christiaan; Bester, Marthan Nieuwoudt; Altwegg, Res; McIntyre, Trevor; De Bruyn, P.J. Nico (Ecological Society of America, 2015-08)Predator populations are likely to respond to bottom-up processes, but there remains limited understanding of how wide-ranging marine predators respond to environmentally driven temporal variation in food availability.Widespread ...
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Lloyd, Kyle J.; Oosthuizen, Wessel Christiaan; Rotella, Jay J.; Bester, Marthan Nieuwoudt; De Bruyn, P.J. Nico (Elsevier, 2023-06)Polygynous males allocate substantial resources to sexual traits and behaviours to improve their chances of winning competitions for mates often at the cost of body maintenance. However, the degree to which males experience ...
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Jordaan, Rowan Keith; Oosthuizen, W. Chris; Reisinger, Ryan R.; De Bruyn, P.J. Nico (Wiley, 2023-06)Most marine apex predators are keystone species that fundamentally influence their ecosystems through cascading top-down processes. Reductions in worldwide predator abundances, attributed to environmental-and anthrop ...
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McIntyre, Trevor; Bornemann, Horst; De Bruyn, P.J. Nico; Reisinger, Ryan Rudolf; Steinhage, Daniel; Marquez, Maria E.I.; Bester, Marthan Nieuwoudt; Plotz, Joachim (Co-Action Publishing, 2014)Understanding the distribution and foraging ecology of major consumers within pelagic systems, specifically in relation to physical parameters, can be important for the management of bentho-pelagic systems undergoing ...
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Lubcker, Nico; Whiteman, John P.; Millar, Robert P.; De Bruyn, P.J. Nico; Newsome, Seth D. (Springer, 2020-05)Changes in the nutritional status of free-ranging animals have a strong influence on individual fitness, yet it remains challenging to monitor longitudinally. Nitrogen (δ15N) and carbon (δ13C) isotope values measured ...
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Wege, Mia; Postma, Martin; Tosh, Cheryl A.; De Bruyn, P.J. Nico; Bester, Marthan Nieuwoudt (Springer, 2015-04)A leucistic Antarctic fur seal (Arctocephalus gazella) pup was born on subantarctic Marion Island during the austral summer of 2010/2011. This is the first confirmed record of a leucistic fur seal pup born outside ...
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Havemann, Carl Peter; Retief, Tarryn Anne; Collins, Kirsten; Fynn, R.W.S.; De Bruyn, P.J. Nico (Wiley, 2014-12)No abstract available.
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Bester, Marthan Nieuwoudt; Stansfield, L.J.; Glass, Trevor; De Bruyn, P.J. Nico (Springer, 2021-05)Some top predator populations in the South Atlantic and South Indian oceans are in decline, presumably contingent upon reduced food availability, precipitated by climate change. This phenomenon impacts on the positions of ...
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Paijmans, Anneke J.; Stoffel, Martin A.; Bester, Marthan Nieuwoudt; Cleary, Alison C .; De Bruyn, P.J. Nico; Forcada, Jaume; Goebel, Michael E .; Goldsworthy, Simon D.; Guinet, Christophe; Lydersen, Christian; Kovacs, Kit M.; Lowther, Andrew; Hoffman, Joseph I. (Nature Publishing Group, 2020-03-20)Understanding the effects of human exploitation on the genetic composition of wild populations is important for predicting species persistence and adaptive potential. We therefore investigated the genetic legacy of ...
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Oosthuizen, Wessel Christiaan; De Bruyn, P.J. Nico; Wege, Mia; Bester, Marthan Nieuwoudt (Oxford University Press, 2016-04)Marine predator populations are sensitive to temporal variation in prey availability, but prey dynamics are often difficult to quantify. Long-term measures of offspring growth is a useful performance attribute to gauge the ...
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Hoffman, J.I.; Bauer, E.; Paijmans, A.J.; Humble, E.; Beckmann, L.M.; Kubetschek, C.; Christaller, F.; Krocker, N.; Fuchs, B.; Moreras, A.; Shihlomule, Y.D.; Bester, Marthan Nieuwoudt; Cleary, A.C.; De Bruyn, P.J. Nico; Forcada, J.; Goebel, M.E.; Goldsworthy, S.D.; Guinet, C.; Hoelzel, A.R.; Lydersen, C.; Kovacs, K.M.; Lowther, A. (Royal Society Publishing, 2018-10)Evaluating how populations are connected by migration is important for understanding species resilience because gene flow can facilitate recovery from demographic declines. We therefore investigated the extent to which ...
Now showing items 1-20 of 66