Possible contemporary evolution in an endangered species, the Santa Cruz Island fox

2009 ◽  
Vol 12 (2) ◽  
pp. 120-127 ◽  
Author(s):  
H. M. Swarts ◽  
K. R. Crooks ◽  
N. Willits ◽  
R. Woodroffe
2000 ◽  
Vol 36 (2) ◽  
pp. 397-404 ◽  
Author(s):  
Kevin R. Crooks ◽  
Cheryl A. Scott ◽  
Lizabeth Bowen ◽  
Dirk Van Vuren

2020 ◽  
Vol 25 (2) ◽  
pp. 263-286
Author(s):  
Elizabeth Hennessy

Abstract This article tells the stories behind the names of two species of Galápagos giant tortoise, Chelonoidis porteri and Chelonoidis donfaustoi, both of which inhabit Santa Cruz Island and which, until 2015, were considered one species, C. porteri. Taking a multispecies approach, it demonstrates how changing species designations reflect coevolving histories of science and conservation. Walter Rothschild assigned the name Testudo porteri in 1903 at a time when naturalists increasingly were concerned about the scarcity of animals they came to see as both endemic and endangered. Rothschild’s epithet honored US naval captain David Porter, the first person to write about differences among the Galápagos tortoises in the 1810s, which he noticed because his crews gathered tons of the animals as food stores for Pacific voyages. For Rothschild, saving species meant preserving them in his museum for the benefit of science before they were eaten. A century later, some of the C. porteri animals were renamed C. donfaustoi based on genetic studies of evolution and very different approaches to saving endangered species. This case study shows how nature, science, and conservation have coproduced species differently at different historical moments. By examining the changing practices through which species are enacted, this article outlines a framework by which environmental historians might productively engage with histories of science and science and technology studies to query just what species are, how they change, and with what consequences.


2001 ◽  
Vol 37 (1) ◽  
pp. 189-193 ◽  
Author(s):  
Kevin R. Crooks ◽  
Cheryl A. Scott ◽  
Lisa Angeloni ◽  
Lizabeth Bowen ◽  
Robert B. Kimsey ◽  
...  

Author(s):  
John Seibert Farnsworth

This chapter presents the author's field notes from the Santa Cruz Island Reserve. The author was particularly interested in studying island foxes. Lacking natural predators, island foxes tend not to find humans intimidating, indeed appearing tame even though they are technically wild. The island fox is currently on the rebound from endangered status. There were two thousand foxes on Santa Cruz Island in 1994, but canine distemper and golden eagle predation reduced the numbers to under 135 by 2000. The author was also interested in the endangered plants, the red-tailed hawk, the anise swallowtail, and the island scrub-jays. Not only is the island scrub-jay endemic, occurring only on the island, but it is also the only insular land bird in either the United States or Canada. The explanation for this is that scrub-jays seem incapable of crossing significant amounts of water.


Oryx ◽  
2014 ◽  
Vol 50 (1) ◽  
pp. 121-127 ◽  
Author(s):  
Scott A. Morrison ◽  
Anthony J. DeNicola ◽  
Kelvin Walker ◽  
David Dewey ◽  
Lyndal Laughrin ◽  
...  

AbstractEradication of introduced species is often necessary to conserve native biota on islands. Seven wild turkeys Meleagris gallopavo were introduced to Santa Cruz Island, California, in 1975 and the population began to irrupt in the early 2000s. Turkeys posed a variety of threats to native species, including that they could replace the previously eradicated population of feral pigs Sus scrofa as a prey subsidy for golden eagles Aquila chrysaetos, which through incidental predation had driven three subspecies of island fox Urocyon littoralis to near extinction. We implemented a four-phase programme to eradicate the turkey population, based on general principles for eradication efforts. For example, we focused on preventing individual turkeys from becoming aware of our methods, which increased the likelihood we would be able to detect and dispatch all of the birds. Leveraging the tendency of turkeys to aggregate during winter, we used baited drop nets, precision shooting, and monitoring of surgically sterilized, radio-telemetered ‘Judas turkeys’ to eliminate the population. We estimate the population comprised 310 individuals when the project began in 2006 and that the last bird died in December 2012. Methods used in this project could be applied to other alien bird eradication programmes, of which there are few examples in the scientific literature.


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