Browsing Research Articles (Mammal Research Institute) by UP Author "Postma, Martin"

Browsing Research Articles (Mammal Research Institute) by UP Author "Postma, Martin"

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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 ...
  • 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 ...
  • McIntyre, Trevor; Postma, Martin; Van der Merwe, Derek S.; Wege, Mia; Bester, Marthan Nieuwoudt (Southern African Wildlife Management Association, 2011-10)
    Goose barnacles (Lepas australis) were found attached to satellite-tracking and time-depth recording (TDR) instruments carried by two lactating Subantarctic fur seals (Arctocephalus tropicalis) from Marion Island. We ...
  • Oosthuizen, W.C. (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, ...
  • Postma, Martin; Wege, Mia; Bester, Marthan Nieuwoudt; Van der Merwe, Derek S.; De Bruyn, P.J. Nico (Zoological Society of Southern Africa, 2011-04)
    Opportunistic shore-based sightings of southern right whales Eubalaena australis for Marion Island (46°54'S, 37°45'E) were documented at five different times between 1974 and 2009. Whales were sighted between May and ...
  • Bester, Marthan Nieuwoudt; De Bruyn, P.J. Nico; Oosthuizen, W.C. (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 ...
  • Wege, Mia; Bester, Marthan Nieuwoudt; Van der Merwe, Derek S.; Postma, Martin (Springer, 2011-09)
    We present the first evidence of a possible case of the Oedipus complex in a nonprimate. An Antarctic fur seal pup, Arctocephalus gazella, unsuccessfully directed what appeared to be copulatory behaviour towards its own ...
  • Bester, Marthan Nieuwoudt; Wege, Mia; Lubcker, Nico; Postma, Martin; Syndercombe, Gavin (Springer, 2019-01)
    The distribution, density and percentage contribution of pack ice pinnipeds during ship-board censuses in the eastern Weddell Sea in summer 2015/2016 are presented. Of the four true pack ice seal species encountered, ...
  • De Bruyn, P.J. Nico; Cameron, Elissa Z.; Tosh, Cheryl A.; Oosthuizen, W.C. (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 ...
  • Postma, Martin; Bester, Marthan Nieuwoudt; De Bruyn, P.J. Nico (Cambridge University Press, 2013-12)
    Physically weighing large marine mammals sequentially over time has presented researchers with a logistical challenge and has severely limited sample sizes. Using a well-established photogrammetry method we developed a ...
  • Postma, Martin; Tordiffe, A.S.W. (Adrian Stephen Wolferstan); Hofmeyr, M.S.; Reisinger, Ryan Rudolf; Bester, L. Catherine; Buss, Peter Erik; De Bruyn, P.J. Nico (Ecological Society of America, 2015-12-22)
    Assessing body mass in mammals is of importance as it influences virtually all aspects of mammal physiology, behavior and ecological parameters. However, the assessment of body mass of large mammals is potentially dangerous ...