Search Results - "Bester, MN"

Core habitat use of an apex predator in a complex marine landscape by Jewell, Oliver J. D., Wcisel, Michelle A., Towner, Alison V., Chivell, Wilfred, van der Merwe, Lize, Bester, Marthán N.

“…Manual acoustic telemetry was used to describe core habitat use of white sharks in the complex marine landscape of the Dyer Island and Geyser Rock system near…”
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Cape fur seals (Arctocephalus pusillus pusillus) adjust traversing behaviour with lunar conditions in the high white shark (Carcharodon carcharias) density waters of Mossel Bay, South Africa by Morse, P., Mole, M. A., Bester, M. N., Johnson, R., Scacco, U., Gennari, E.

“…White sharks Carcharodon carcharias are highly visual predators, leading to the hypothesis that the predation risk for foraging Cape fur seals Arctocephalus…”
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Cross-seasonal foraging site fidelity of subantarctic fur seals: implications for marine conservation areas by Wege, M., Tosh, C. A., de Bruyn, P. J. N., Bester, M. N.

“…Marine top predators show fidelity to foraging areas with predictable high-quality food patches. Areas of predictable prey yield are of conservation…”
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Low trophic level diet of juvenile southern elephant seals Mirounga leonina from Marion Island: a stable isotope investigation using vibrissal regrowths by Lübcker, Nico, Reisinger, Ryan R., Oosthuizen, W. Chris, de Bruyn, P. J. Nico, van Tonder, André, Pistorius, Pierre A., Bester, Marthán N.

“…Insight into the trophic ecology of marine predators is vital for understanding their ecosystem role and predicting their responses to environmental change…”
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Vibrissal growth parameters of southern elephant seals Mirounga leonina: obtaining fine-scale, time-based stable isotope data by Lübcker, Nico, Condit, Richard, Beltran, Roxanne S., de Bruyn, P. J. Nico, Bester, Marthán N.

“…Stable isotopes provide a powerful, indirect approach to assess the trophic ecology of individuals on a spatial and temporally integrated basis (especially…”
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Elephant seal dive behaviour is influenced by ocean temperature: implications for climate change impacts on an ocean predator by McIntyre, Trevor, Ansorge, Isabelle J., Bornemann, Horst, Plötz, Joachim, Tosh, Cheryl A., Bester, Marthán N.

“…The potential effects of ocean warming on marine predators are largely unknown, though the impact on the distribution of prey in vertical space may have far…”
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Distribution, density and abundance of Antarctic ice seals off Queen Maud Land and the eastern Weddell Sea by Gurarie, Eliezer, Bengtson, John L., Bester, Marthán N., Blix, Arnoldus Schytte, Cameron, Michael, Bornemann, Horst, Nordøy, Erling S., Plötz, Joachim, Steinhage, Daniel, Boveng, Peter

“…The Antarctic Pack Ice Seal (APIS) Program was initiated in 1994 to estimate the abundance of four species of Antarctic phocids: the crabeater seal Lobodon…”
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Segregation in a sexually dimorphic mammal: a mixed-effects modelling analysis of diving behaviour in southern elephant seals by McIntyre, Trevor, Tosh, Cheryl A., Plötz, Joachim, Bornemann, Horst, Bester, Marthán N.

“…Sexual segregation in habitat use occurs in a number of animal species, including southern elephant seals, where differences in migration localities and dive…”
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Abundance and degree of residency of humpback dolphins Sousa plumbea in Mossel Bay, South Africa by James, BS, Bester, MN, Penry, GS, Gennari, E, Elwen, SH

“…Indian Ocean humpback dolphins Sousa plumbea inhabit nearshore waters from South Africa to eastern India. Humpback dolphins are vulnerable to conservation…”
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Sex at sea: alternative mating system in an extremely polygynous mammal by de Bruyn, P.J.N., Tosh, C.A., Bester, M.N., Cameron, E.Z., McIntyre, T., Wilkinson, I.S.

“…Polygyny is a widespread and evolutionarily significant mating system in vertebrates. The southern elephant seal, Mirounga leonina, has often been cited as…”
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Bathymetry and frontal system interactions influence seasonal foraging movements of lactating subantarctic fur seals from Marion Island by de Bruyn, P. J. Nico, Tosh, Cheryl A., Oosthuizen, W. Chris, Bester, Marthán N., Arnould, John P. Y.

“…Sixteen lactating subantarctic fur sealsArctocephalus tropicaliswere satellite-tracked during the winter of 2006 (n = 6), summer of 2006/07 (n = 6) and…”
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Population dynamics of southern elephant seals: a synthesis of three decades of demographic research at Marion Island by Pistorius, PA, de Bruyn, PJN, Bester, MN

“…Southern elephant seal Mirounga leonina numbers declined precipitously throughout most of their circumpolar distribution since the 1950s. A long-term intensive…”
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A Demographic Comparison of Two Southern Elephant Seal Populations by McMahon, Clive R., Burton, Harry R., Bester, Marthán N.

“…1. To estimate concurrent age-specific survival for southern elephant seals at Macquarie and Marion islands, seals were marked from 1993 to 1997 in the first 3…”
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Comparison of southern elephant seal populations, and observations of a population on a demographic knife-edge by McMahon, Clive R., Hindell, Mark A., Burton, Harry R., Bester, Marthán N.

“…The dynamics of animal populations are determined by several key demographic parameters, which vary over time with resultant changes in the status of the…”
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Population status, trends and a re-examination of the hypotheses explaining the recent declines of the southern elephant seal Mirounga leonina by MCMAHON, CLIVE R., BESTER, MARTHÁN N., BURTON, HARRY R., HINDELL, MARK A., BRADSHAW, COREY J. A.

“…ABSTRACT 1. Between the 1950s and 1990s the southern elephant seal Mirounga leonina underwent large decreases in population size throughout most of its…”
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Elephant seal foraging dives do indeed track prey distribution, but temperature influences the distribution of prey: Reply to Boersch-Supan et al. (2012) by McIntyre, Trevor, Ansorge, Isabelle J., Bornemann, Horst, Plötz, Joachim, Tosh, Cheryl A., Bester, Marthán N.

“…McIntyre et al. (2011a; Mar Ecol Prog Ser 441:257−272) illustrated a number of relationships between environmental variables and the dive behaviour of…”
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Prey and seasonal abundance of killer whales at sub-Antarctic Marion Island by Reisinger, RR, de Bruyn, PJN, Tosh, CA, Oosthuizen, WC, Mufanadzo, NT, Bester, MN

“…The diet of killer whales Orcinus orca was investigated from 48 predation events observed during 823 sightings at sub-Antarctic Marion Island between 2006 and…”
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Natal site fidelity by breeding female southern elephant seals in relation to their history of participation in the winter haulout by Hofmeyr, GJG, Kirkman, SP, Pistorius, PA, Bester, MN

“…Of the four types of terrestrial haulout periods undertaken by southern elephant seals Mirounga leonina, only the purpose of the winter haulout is unknown…”
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The Marine Mammal Programme at the Prince Edward Islands: 38 years of research by Bester, MN, de Bruyn, PJN, Oosthuizen, WC, Tosh, CA, McIntyre, T, Reisinger, RR, Postma, M, van der Merwe, DS, Wege, M

“…The Marine Mammal Programme (MMP) conducts research on pinnipeds and killer whales Orcinus orca at Marion Island, Prince Edward Islands, under the auspices of…”
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Adult female survival, population trend, and the implications of early primiparity in a capital breeder, the southern elephant seal (Mirounga leonina) by Pistorius, P. A., Bester, M. N., Lewis, M. N., Taylor, F. E., Campagna, C., Kirkman, S. P.

“…Adult female survival as a potential proximate factor responsible for observed changes in southern elephant seal Mirounga leonina populations was investigated…”
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