Elephants and mammoths: the effect of an imperfect legal substitute on illegal activity

2019 ◽  
Vol 24 (3) ◽  
pp. 225-251
Author(s):  
Naima Farah ◽  
John R. Boyce

AbstractIn response to the CITES ban on trade in elephant ivory, mammoth ivory began to be produced in post-Soviet Russia. We investigate how this substitute to elephant ivory has affected the poaching of elephants. We argue that the early success of the 1989 ivory ban at increasing the African elephant population was driven in part by increasing supply of mammoth ivory. The more recent increases in poaching appear to be driven by increasing demand and falling African institutional quality. We find that absent the 80 tonnes of Russian mammoth ivory exports per annum 2010–2012, elephant ivory prices would have doubled from their $ 100 per kilogram level and that the current poaching level of 34,000 elephants per year may have increased by as many as 55,000 elephants per year on a population of roughly half a million animals.

2021 ◽  
Vol 37 (8) ◽  
pp. 755-755
Author(s):  
Carol M Stockton

2009 ◽  
Vol 102 (7) ◽  
pp. 534-539
Author(s):  
Sarah Quebec Fuentes

How many elephants remain in Africa? For a variety of environmental reasons, monitoring the population of elephants in Africa is extremely important. When attempting to estimate the size of an elephant population in a certain area, a researcher must make several decisions. Should the count be conducted from the air or from the ground? Should the elephants in the entire area be counted or only those in a representative area? Should only the elephants themselves be counted, or should signs of their presence—such as dung, tracks, and feeding evidence—be considered as well? Over the past four decades, the approaches used to count elephants have become more statistically refined. This twopart article, to be continued in next month's issue, will explore the mathematics of some of the methods used to count elephants and will present related activities for the mathematics classroom. In this part, we will provide a brief but pertinent history of the African elephant and then present two different methods of counting elephants. This activity may be used as an entire unit or as an application of a particular concept and may be incorporated into several courses. Algebra and geometry students will be able to handle the necessary mathematics. Although this activity informally exposes students to several statistical concepts, a sophisticated understanding of statistics is not required to complete the first two scenarios. The mathematics for the third scenario is more advanced, however; thus, it could be used in higher-level classes such as statistics and calculus. The tasks involved in all three scenarios encourage students to make connections between mathematics and other disciplines and touch on the various implications of mathematical decisions.


Oryx ◽  
1982 ◽  
Vol 16 (3) ◽  
pp. 235-239 ◽  
Author(s):  
J. S. C. Parker ◽  
Esmond Bradley Martin

After careful examination of trade and other statistics, notably in Hong Kong and Japan, which are the two major importers of African elephant ivory, the authors calculated average tusk weights and estimated the number of elephants involved in Africa's raw ivory exports. They conclude that previous estimates of the number of African elephants killed have been exaggerated.


PLoS ONE ◽  
2013 ◽  
Vol 8 (1) ◽  
pp. e53726 ◽  
Author(s):  
George Wittemyer ◽  
David Daballen ◽  
Iain Douglas-Hamilton

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