نتایج جستجو برای: lion

تعداد نتایج: 3088  

2009
Ross Barnett Nobuyuki Yamaguchi Beth Shapiro Richard Sabin

The Royal Menagerie of England was established at the Tower of London in the 13th Century and served as a home of exotic animals until it was closed on behalf of the Duke of Wellington in 1835. Two well-preserved lion skulls recovered from the moat of the Tower of London were recently radiocarbon-dated to AD 1280-1385 and AD 1420-1480, making them the earliest con rmed lion remains in the Brit...

Journal: :Journal of lipid research 1991
R W Davis V R Pierotti S J Lauer S T Hubl J W McLean J L Witztum S G Young

We have examined the apolipoprotein content of the lipoproteins of several marine mammals by sodium dodecyl sulfate-polyacrylamide gel electrophoresis. Their apolipoprotein (apo) B-100, apoB-48, and apoA-I migrated to virtually the same position as the comparable human apolipoproteins. In cetaceans (bottlenose dolphins and killer whales), the molecular mass of the apoE was identical to that of ...

2014
Narges Noori Volkan Isler

We study the well-known lion-and-man game in which a lion (the pursuer) tries to capture a man (the evader). The players have equal speed and they can observe each other at all times. In this paper, we study the game on the surface of convex terrains. We show that the lion can capture the man in finite number of steps which is a function of the terrain geometry.

Journal: :Encyclopédie berbère 2008

Journal: :The Journal of animal ecology 2014
Alexandra Swanson Tim Caro Harriet Davies-Mostert Michael G L Mills David W Macdonald Markus Borner Emmanuel Masenga Craig Packer

Top predators can dramatically suppress populations of smaller predators, with cascading effects throughout communities, and this pressure is often unquestioningly accepted as a constraint on mesopredator populations. In this study, we reassess whether African lions suppress populations of cheetahs and African wild dogs and examine possible mechanisms for coexistence between these species. Usin...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2015
Hans Bauer Guillaume Chapron Kristin Nowell Philipp Henschel Paul Funston Luke T B Hunter David W Macdonald Craig Packer

We compiled all credible repeated lion surveys and present time series data for 47 lion (Panthera leo) populations. We used a Bayesian state space model to estimate growth rate-λ for each population and summed these into three regional sets to provide conservation-relevant estimates of trends since 1990. We found a striking geographical pattern: African lion populations are declining everywhere...

2016
David W. Macdonald Kim S. Jacobsen Dawn Burnham Paul J. Johnson Andrew J. Loveridge

The killing of a satellite-tagged male lion by a trophy hunter in Zimbabwe in July 2015 provoked an unprecedented media reaction. We analyse the global media response to the trophy hunting of the lion, nicknamed "Cecil", a study animal in a long-term project run by Oxford University's Wildlife Conservation Research Unit (WildCRU). We collaborated with a media-monitoring company to investigate t...

2017

Norms have been extensively studied to coordinate multi-agent systems, and the literature has investigated two general approaches to norm synthesis: off-line (synthesising norms at design-time) and on-line (runtime synthesis). On-line synthesis is generally recognised to be appropriate for open systems, where aspects of the system remain unknown at design-time. In this paper we present LION , a...

Journal: :Journal of applied animal welfare science : JAAWS 2012
Angela S Kelling Stephanie M Allard Nicholas J Kelling Estelle A Sandhaus Terry L Maple

Felids in captivity are often inactive and elusive in zoos, leading to a frustrating visitor experience. Eight roars were recorded from an adult male lion and played back over speakers as auditory enrichment to benefit the lions while simultaneously enhancing the zoo visitor experience. In addition, ungulates in an adjacent exhibit were observed to ensure that the novel location and increased f...

2014
Stephanie Dolrenry Jennifer Stenglein Leela Hazzah R. Scott Lutz Laurence Frank

Due to anthropogenic pressures, African lion (Panthera leo) populations in Kenya and Tanzania are increasingly limited to fragmented populations. Lions living on isolated habitat patches exist in a matrix of less-preferred habitat. A framework of habitat patches within a less-suitable matrix describes a metapopulation. Metapopulation analysis can provide insight into the dynamics of each popula...

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