Browsing Research Articles (Zoology and Entomology) by UP Author "Oosthuizen, Wessel Christiaan"
- UPSpace Home
- →
- Natural and Agricultural Sciences
- →
- Zoology and Entomology
- →
- Research Articles (Zoology and Entomology)
- →
- Browsing Research Articles (Zoology and Entomology) by UP Author
JavaScript is disabled for your browser. Some features of this site may not work without it.
Browsing Research Articles (Zoology and Entomology) by UP Author "Oosthuizen, Wessel Christiaan"
Now showing items 1-20 of 27
-
Vargas-Fonseca, O. Alejandra; Kirkman, Stephen P.; Oosthuizen, Wessel Christiaan; Bouveroux, Thibaut; Cockcroft, Vic; Conry, Danielle S.; Pistorius, Pierre Anton (Public Library of Science, 2020-10)Coastally distributed dolphin species are vulnerable to a variety of anthropogenic pressures, yet a lack of abundance data often prevents data-driven conservation management strategies from being implemented. We investigated ...
-
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 ...
-
Oosthuizen, Wessel Christiaan; De Bruyn, P.J. Nico; Bester, Marthan Nieuwoudt; Girondot, Marc (Wiley -Blackwell, 2010-04)Marker-loss is a common feature of mark–recapture studies and important as it may bias parameter estimation. A slight alteration in tag-site of double tagged southern elephant seals (Mirounga leonina), marked at Marion ...
-
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 ...
-
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 ...
-
Oosthuizen, Wessel Christiaan; Bester, Marthan Nieuwoudt; Tosh, Cheryl A.; Guinet, Christophe; Besson, Dominique; De Bruyn, P.J. Nico (Cambridge University Press, 2011-07)Southern elephant seals Mirounga leonina within the Kerguelen province disperse between Marion Island (MI), Iles Crozet (IC) and Iles Kerguelen (IK) despite the high site fidelity characteristic of this species. From ...
-
Nachtsheim, Dominik A.; Ryan, Svenja; Schroder, Michael; Jensen, Laura; Oosthuizen, Wessel Christiaan; Bester, Marthan Nieuwoudt; Hagen, Wilhelm; Bornemann, Horst (Elsevier, 2019-04)The region of the Filchner Outflow System (FOS) in the southeastern Weddell Sea is characterized by intensive and complex interactions of different water masses. Dense Ice Shelf Water (ISW) emerging from beneath the ice ...
-
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 ...
-
De Bruyn, P.J. Nico; Bester, Marthan Nieuwoudt; Carlini, Alejandro R.; Oosthuizen, Wessel Christiaan (Inter-Research, 2009-03)Several studies have developed photogrammetric techniques for indirect mass estimation of seals. Unfortunately, these techniques are often narrowly delineated for specific field scenarios or species. Many require ...
-
Oosthuizen, Wessel Christiaan; Postma, Martin; Altwegg, Res; Nevoux, Marie; Pradel, Roger; Bester, Marthan Nieuwoudt; De Bruyn, P.J. Nico (Wiley, 2019-10)Recruitment age plays a key role in life‐history evolution. Because individuals allocate limited resources among competing life‐history functions, theory predicts trade‐offs between current reproduction and future growth, ...
-
Oosthuizen, Wessel Christiaan; Bester, Marthan Nieuwoudt; De Bruyn, P.J. Nico; Hofmeyr, G.J. Greg (Gordon John Gregory) (NISC, 2009)During three summer surveys at Prince Edward Island (PEI), southern Indian Ocean (2001, 2004 and 2008), 416 southern elephant seals Mirounga leonina were inspected for identification tags. In all, 42 seals that had been ...
-
Oosthuizen, Wessel Christiaan; De Bruyn, P.J. Nico (Seabird Group, 2009)No abstract available.
-
Oosthuizen, Wessel Christiaan; De Bruyn, P.J. Nico (Springer, 2009)Interspecific parental care is rare, conveys no ultimate evolutionary advantage, and is usually attributed to reproductive errors in species with analogous habitat, behaviour and diet. We report on interspecific parental ...
-
Oosthuizen, Wessel Christiaan; Pradel, Roger; Bester, Marthan Nieuwoudt; De Bruyn, P.J. Nico (Wiley Open Access, 2019-01)Increased environmental stochasticity due to climate change will intensify temporal variance in the life‐history traits, and especially breeding probabilities, of long‐lived iteroparous species. These changes may decrease ...
-
Bester, Marthan Nieuwoudt; De Bruyn, P.J. Nico; Oosthuizen, Wessel Christiaan; Tosh, Cheryl A.; McIntyre, Trevor; Reisinger, Ryan Rudolf; Postma, Martin; Van der Merwe, Derek S.; Wege, Mia (Taylor & Francis, 2011)The Marine Mammal Programme (MMP) conducts research on pinnipeds and killer whales Orcinus orca at Marion Island, Prince Edward Islands, under the auspices of the Mammal Research Institute, Department of Zoology and ...
-
Oosthuizen, Wessel Christiaan; Altwegg, Res; Nevoux, Marie; Bester, Marthan Nieuwoudt; De Bruyn, P.J. Nico (Wiley, 2018-06)Early developmental conditions contribute to individual heterogeneity of both phenotypic traits and fitness components, ultimately affecting population dynamics. Although the demographic consequences of ontogenic growth ...
-
Oosthuizen, Wessel Christiaan; Peron, Guillaume; Pradel, Roger; Bester, Marthan Nieuwoudt; De Bruyn, P.J. Nico (Ecological Society of America, 2021-04)Correlations between early- and late-life performance are a major prediction of life-history theory. Negative early–late correlations can emerge because biological processes are optimized for early but not late life ...
-
De Bruyn, P.J. Nico; Cameron, Elissa Z.; Tosh, Cheryl A.; Oosthuizen, Wessel Christiaan; Reisinger, Ryan Rudolf; Mufanadzo, N. Thomas; Phalanndwa, Mashudu V.; Postma, Martin; Wege, Mia; Van der Merwe, Derek S.; Bester, Marthan Nieuwoudt (Elsevier, 2010-01)Non-offspring maternal care should be rare due to the high costs of raising offspring, particularly lactation, but nonetheless occurs in a variety of taxa. Misguided parental care, associated with recognition errors and/or ...
-
Lowther, Andrew D.; Ahonen, Heidi; Hofmeyr, Greg; Oosthuizen, Wessel Christiaan; De Bruyn, P.J. Nico; Lydersen, Christian; Kovacs, Kit M.; Corkeron, Peter (Inter-Research, 2015-10-28)Very high frequency (VHF) radiotelemetry data has been used for over 30 yr to monitor the behavior patterns of otariid seals. These data have been used in a wide variety of ways, from characterizing the reproductive and ...
-
Arthur, Benjamin; Hindell, Mark A.; Bester, Marthan Nieuwoudt; Trathan, Phil; Jonsen, Ian; Staniland, Lain; Oosthuizen, Wessel Christiaan; Wege, Mia; Lea, Mary-Anne (Public Library of Science, 2015-03-25)Strategies employed by wide-ranging foraging animals involve consideration of habitat quality and predictability and should maximise net energy gain. Fidelity to foraging sites is common in areas of high resource ...
Now showing items 1-20 of 27