Browsing Research Articles (Mammal Research Institute) by UP Author "McIntyre, Trevor"

Browsing Research Articles (Mammal Research Institute) by UP Author "McIntyre, Trevor"

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  • Animal telemetry : tagging effects 
    McIntyre, Trevor (American Association for the Advancement of Science, 2015-08)
    The 12 June Reviews by R. Kays et al. (“Terrestrial animal tracking as an eye on life and planet,” p. 1222) and N. E. Hussey et al. (“Aquatic animal telemetry: A panoramic window into the underwater world,” p. 1221) ...
  • An assessment of spatial and temporal variation in the diet of Cape clawless otters (Aonyx capensis) in marine environments 
    Jordaan, Rowan Keith; McIntyre, Trevor; Somers, Michael J.; Bester, Marthan Nieuwoudt (Southern African Wildlife Management Association, 2015-10)
    We studied the diet of Cape clawless otters (Aonyx capensis) at three sites along the eastern and southern coast of South Africa to assess possible spatial variation along a community species richness and biomass gradient ...
  • Dancing to the message : African clawless otter scent marking behaviour 
    Jordaan, Rowan Keith; Somers, Michael J.; McIntyre, Trevor (Associazione Teriologica Italiana, 2017-09-04)
    Latrine use and behaviour at latrines have been studied in numerous otter species, but not African clawless otters, Aonyx capensis. We set up trail cameras at two latrines near Dullstroom, South Africa. On several ...
  • Decomposing the variance in southern elephant seal weaning mass : partitioning environmental signals and maternal effects 
    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 ...
  • Deep divers in even deeper seas : habitat use of male southern elephant seals from Marion Island 
    McIntyre, Trevor; Bornemann, Horst; Plotz, Joachim; Tosh, Cheryl A.; Bester, Marthan Nieuwoudt (Cambridge University Press, 2012)
    We describe the habitat use of 22 male southern elephant seals (Mirounga leonina) satellite tagged at Marion Island between 2004 and 2008. While a few areas of increased utilization appeared to be associated with areas ...
  • The diet of spotted-necked otters foraging in trout-stocked waters in Mpumalanga, South Africa 
    Jordaan, Rowan Keith; Somers, Michael J.; Hall, Grant; McIntyre, Trevor (NISC (Pty) Ltd and Informa UK Limited (trading as Taylor and Francis Group), 2020)
    Human-wildlife conflict is likely to increase as urbanisation increases. African clawless otters, Aonyx capensis, and spotted-necked otters, Hydrictis maculicollis, are illegally persecuted for their perceived role in ...
  • Environmental influences on the at-sea behaviour of a major consumer, Mirounga leonina, in a rapidly changing environment 
    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 ...
  • Estimates of the Southern Ocean general circulation improved by animal-borne instruments 
    Roquet, Fabien; Wunsch, Carl; Forget, Gael; Heimbach, Patrick; Guinet, Christophe; Reverdin, Gilles; Charrassin, Jean-Benoit; Bailleul, Frederic; Costa, Daniel P.; Huckstadt, Luis A.; Goetz, Kimberly T.; Kovacs, Kit M., 1956-; Lydersen, Christian; Biuw, Martin; Nøst, Ole A.; Bornemann, Horst; Ploetz, Joachim; Bester, Marthan Nieuwoudt; McIntyre, Trevor; Muelbert, Monica M.C.; Hindell, Mark A.; McMahon, Clive Reginald; Williams, Guy; Harcourt, Robert; Field, Iain C.; Chafik, Leon; Nicholls, Keith W.; Boehme, Lars; Fedak, Mike A. (American Geophysical Union, 2013)
    Over the last decade, several hundred seals have been equipped with conductivity-temperature-depth sensors in the Southern Ocean for both biological and physical oceanographic studies. A calibrated collection of ...
  • Fine-scale feeding behavior of Weddell seals revealed by a mandible accelerometer 
    Naito, Yasuhiko; Bornemann, Horst; Takahashi, Akinori; McIntyre, Trevor; Plotz, Joachim (Elsevier, 2010-08)
    We used a mandible accelerometer to document feeding events in two free-ranging adult female Weddell seals in Atka Bay, Antarctica. Using spectral analysis, we isolated several patterns in the mandible acceleration data. ...
  • Fur seal populations facilitate establishment of exotic vascular plants 
    Haussmann, Natalie S.; Rudolph, Elizabeth M.; Kalwij, Jesse M.; McIntyre, Trevor (Elsevier, 2013)
    The cessation of seal harvesting has prompted a recovery of previously decimated fur seal (Arctocephalus gazella and Arctocephalus tropicalis) populations across the Southern Ocean region. Although the associated increase ...
  • Goose barnacles hitchhike on satellite-tracked southern elephant seals 
    Reisinger, Ryan Rudolf; McIntyre, Trevor; Bester, Marthan Nieuwoudt (Springer, 2009-09)
    Goose barnacles (Lepas australis) attached to satellite-relay data loggers were carried by three southern elephant seals (Mirounga leonina) from Marion Island. Their movements across the Polar Frontal Zone are presented, ...
  • Hitchhiking goose barnacles and their potential implications on the functioning of animal-borne instruments 
    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 ...
  • Hot and bothered : alterations in faecal glucocorticoid metabolite concentrations of the sungazer lizard, Smaug giganteus, in response to an increase in environmental temperature 
    Scheun, Juan; Campbell, R.; Ganswindt, Andre; McIntyre, Trevor (NISC (Pty) Ltd and Informa UK Limited (trading as Taylor & Francis Group), 2021)
    Despite the commonly held belief that reptiles are immune to extreme temperatures, global warming is predicted to result in the loss of 40% of all reptile species by 2080. In order to understand the effects of elevated ...
  • Inter-population differences in diving behaviour of adult male southern elephant seals (Mirounga leonina) 
    James, B.S. (Bridget); McIntyre, Trevor; Tosh, Cheryl A.; Bornemann, Horst; Plotz, Joachim; Bester, Marthan Nieuwoudt (Springer, 2012-11)
    Access to different environments may lead to inter-population behavioural changes within a species that allow populations to exploit their immediate environments. Elephant seals from Marion Island (MI) and King ...
  • Limited animal-facilitated nutrient transfer across an aquatic–terrestrial interface in a southern African savanna 
    Conradie, Shannon Rose; Hall, Grant; Somers, Michael J.; McIntyre, Trevor (Southern African Wildlife Management Association, 2019)
    Animal-mediated nutrient transfer facilitates nutrient cycling in marine, freshwater and terrestrial ecosystems via the deposition of aquatically-derived nutrients such as nitrogen (N) and carbon (C). This mode of nutrient ...
  • Marine Mammal Programme at the Prince Edward Islands : 38 years of research 
    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 ...
  • Marine mammals exploring the oceans pole to pole 
    Treasure, Anne; Roquet, Fabien; Ansorge, Isabelle J.; Bester, Marthan Nieuwoudt; Boehme, Lars; Bornemann, Horst; Charrassin, Jean-Benoit; Chevallier, Damien; Costa, Daniel P.; Fedak, Mike A.; Guinet, Christophe; Hammill, Mike O.; Harcourt, Robert G.; Hindell, Mark A.; Kovacs, Kit M.; Lea, Mary-Anne; Lovell, Phil; Lowther, Andrew D.; Lydersen, Christian; McIntyre, Trevor; McMahon, Clive Reginald; Muelbert, Monica M.C.; Nicholls, Keith; Picard, Baptiste; Reverdin, Gilles; Trites, Andrew W.; Williams, Guy D.; De Bruyn, P.J. Nico (Oceanography Society, 2017)
    Polar oceans are poorly monitored despite the important role they play in regulating Earth’s climate system. Marine mammals equipped with biologging devices are now being used to fill the data gaps in these logistically ...
  • Median pupping date, pup mortality and sex ratio of fur seals at Marion Island 
    Hofmeyr, Gordon John Gregory; Bester, Marthan Nieuwoudt; Pistorius, Pierre Anton; Mulaudzi, Tambudzani W.; De Bruyn, P.J. Nico; Ramunasi, Justice A.; Tshithabane, Hendrik N.; McIntyre, Trevor; Radzilani, Phathu M. (Southern African Wildlife Management Association, 2007)
    Modelling fur seal populations requires the accurate assessment of demographic parameters such as age-specific mortality. Owing to the highly variable mortality rates that pups are subject to, mortality of this age class ...
  • Monitoring the effects of land transformation on African clawless otters (Aonyx capensis) using fecal glucocorticoid metabolite concentrations as a measure of stress 
    Majelantle, Tshepiso Lesedi; McIntyre, Trevor; Ganswindt, Andre (Wiley, 2020-07)
    In a time of increasing environmental change caused by anthropogenic disturbance, there is a greater need to understand animal adaptations to manmade environments. In this regard, the measurement of stress‐related endocrine ...
  • Plasticity and specialisation in the isotopic niche of African clawless otters foraging in marine and freshwater habitats 
    Jordaan, Rowan Keith; Somers, Michael J.; Hall, Grant; McIntyre, Trevor (Elsevier, 2019-09)
    Individual-level behavioural plasticity resulting from differences in environmental conditions is prevalent in many organisms and may result in phenomena such as dietary- or habitat specialisation. The isotopic niche of ...