Search Results - "Karl, Brian J."

Geographic structure of Adelie Penguin populations: overlap in colony-specific foraging areas by Ainley, D.G, Ribic, C.A, Ballard, G, Heath, S, Gaffney, I, Karl, B.J, Barton, K.J, Wilson, P.R, Webb, S

“…In an investigation of the factors leading to geographic structuring among Adélie Penguin (Pygoscelis adeliae) populations, we studied the size and overlap of…”
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Post-fledging survival of Adélie penguins at multiple colonies: chicks raised on fish do well by Ainley, David G., Dugger, Katie M., La Mesa, Mario, Ballard, Grant, Barton, Kerry J., Jennings, Scott, Karl, Brian J., Lescroël, Amelie, Lyver, Phil O’B., Schmidt, Annie, Wilson, Peter

“…We assessed whether the mass of Adélie penguin Pygoscelis adeliae fledglings at 3 colonies of markedly disparate size on Ross Island, Ross Sea, correlated with…”
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Inter-individual differences in the foraging behavior of breeding Adélie penguins are driven by individual quality and sex by Lescroël, Amelie, Lyver, Phil O’B., Jongsomjit, Dennis, Veloz, Sam, Dugger, Katie M., Kappes, Peter, Karl, Brian J., Whitehead, Amy L., Pech, Roger, Cole, Theresa L., Ballard, Grant

“…Inter-individual differences in demographic traits of iteroparous species can arise through learning and maturation, as well as from permanent differences in…”
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Small mammals as potential seed dispersers in New Zealand by Williams, Peter A., Karl, Brian J., Bannister, Peter, Lee, William G.

“…Weed invasion success is strongly influenced by availability of seed dispersal vectors, which may include animals. We examined the potential of several small…”
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Establishing accurate baseline estimates of breeding populations of a burrowing seabird, the grey-faced petrel (Pterodroma macroptera gouldi) in New Zealand by Whitehead, Amy L., Lyver, Philip O’B., Jones, Christopher J., Bellingham, Peter J., MacLeod, Catriona J., Coleman, Morgan, Karl, Brian J., Drew, Keven, Pairman, David, Gormley, Andrew M., Duncan, Richard P.

“…•We used field surveys and predictive habitat models to estimate grey-faced petrel abundances.•Breeding burrow densities increased with elevation and decreased…”
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Factors driving Adélie penguin chick size, mass and condition at colonies of different sizes in the Southern Ross Sea by Whitehead, Amy L., Lyver, Phil O’B., Ballard, Grant, Barton, Kerry, Karl, Brian J., Dugger, Katie M., Jennings, Scott, Lescroël, Amelie, Wilson, Peter R., Ainley, David G.

“…Body size, mass and condition can affect an organism’s ability to cope with variation in resource availability or metabolic demand, particularly as juveniles…”
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Trends in the detections of a large frugivore (Hemiphaga novaeseelandiae) and fleshy-fruited seed dispersal over three decades by Carpenter, Joanna K., Kelly, Dave, Clout, Mick N., Karl, Brian J., Ladley, Jenny J.

“…The kereru (Hemiphaga novaeseelandiae) is a large fruit pigeon that in New Zealand is an important seed disperser for native plant species. However, little is…”
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South Polar Skua breeding populations in the Ross Sea assessed from demonstrated relationship with Adélie Penguin numbers by Wilson, Deborah J., Lyver, Philip O’B., Greene, Terry C., Whitehead, Amy L., Dugger, Katie M., Karl, Brian J., Barringer, James R. F., McGarry, Roger, Pollard, Annie M., Ainley, David G.

“…In the Ross Sea region, most South Polar Skuas ( Stercorarius maccormicki ) nest near Adélie Penguin ( Pygoscelis adeliae ) colonies, preying and scavenging on…”
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Determining the impact of scale insect honeydew, and invasive wasps and rodents, on the decomposer subsystem in a New Zealand beech forest by Wardle, David A, Karl, Brian J, Beggs, Jacqueline R, Yeates, Gregor W, Williamson, Wendy M, Bonner, Karen I

“…Relatively few studies have considered how aboveground invasive consumers influence decomposer communities. We investigated the potential effects of three…”
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SPATIAL AND TEMPORAL VARIATION OF DIET WITHIN A PRESUMED METAPOPULATION OF ADÉLIE PENGUINS by Ainley, David G, Ballard, Grant, Barton, Kerry J, Karl, Brian J, Rau, Greg H, Ribic, Christine A, Wilson, Peter R

“…We investigated temporal and spatial variability in the diet of chick-provisioning Adélie Penguins (Pygoscelis adeliae) breeding at all colonies within one…”
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The fleas of house mice ( Mus musculus L.) and ship rats ( Rattus rattus L.) in forest of the Orongorongo Valley, New Zealand by Fitzgerald, Brian M., Efford, Murray G., Karl, Brian J.

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Assessing pollination and fruit dispersal in Fuchsia excorticata (Onagraceae) by Robertson, Alastair W., Ladley, Jenny J., Kelly, Dave, McNutt, Kate L., Peterson, Paul G., Merrett, Merilyn F., Karl, Brian J.

“…We assessed the degree of pollen and fruit-dispersal limitation in the endemic gynodioe-cious New Zealand tree fuchsia Fuchsia excorticata over several seasons…”
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Soluble carbon production by honeydew scale insects in a New Zealand beech forest by Beggs, Jacqueline R., Karl, Brian J., Wardle, David A., Bonner, Karen I.

“…We estimated the annual production of honeydew per unit land area of beech (Nothofagus spp.) forest by measuring the amount of honeydew produced in 24 h by…”
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Birds and small mammals in kanuka (Kunzea ericoides) and gorse (Ulex europaeus) scrub and the resulting seed rain and seedling dynamics by Williams, Peter A., Karl, Brian J.

“…Native kanuka (Kunzea ericoides) and adventive gorse (Ulex europaeus) stands aged 10-14 years, and not grazed by domestic stock, were studied near Nelson, New…”
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FLESHY FRUITS OF INDIGENOUS AND ADVENTIVE PLANTS IN THE DIET OF BIRDS IN FOREST REMNANTS, NELSON, NEW ZEALAND by WILLIAMS, PETER A., KARL, BRIAN J.

“…The relationship between fleshy-fruited indigenous species and adventive weeds in the diet of 500 mist-netted birds was studied in forest remnants of differing…”
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Spatial and Temporal Variation of Diet Within a Presumed Metapopulation Of Adélie Penguins by Ainley, David G., Ballard, Grant, Barton, Kerry J., Karl, Brian J., Rau, Greg H., Ribic, Christine A., Wilson, Peter R.

“…Abstract We investigated temporal and spatial variability in the diet of chick-provisioning Adélie Penguins (Pygoscelis adeliae) breeding at all colonies…”
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An Improved Radio Transmitter Harness with a Weak Link to Prevent Snagging (Nuevo arnés para colocar radiotransmisores en aves) by Karl, Brian J., Clout, Michael N.

“…Radio transmitters strapped to birds can become entangled thereby trapping and ultimately killing the bird. We describe a transmitter harness that allows an…”
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