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Science 7 July 2006:
Vol. 313. no. 5783, p. 45
DOI: 10.1126/science.1127705
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Technical Comments

Comment on "On the Regulation of Populations of Mammals, Birds, Fish, and Insects" IV

Elizabeth Peacock1* and David L. Garshelis2

Sibly et al.'s (Reports, 22 July 2005, p. 607) contention that density dependence acts strongly on low-density animal populations irrespective of body size contradicts many long-term studies of large mammals. Their findings were distorted by harvest records, which may poorly reflect population trend. Omitting unreliable data, their massive data set is reduced to only one case for large mammals.

1 Department of Biology, University of Nevada–Reno, Reno, NV 89557, USA.
2 Minnesota Department of Natural Resources, Grand Rapids, MN 55744, USA.

* To whom correspondence should be addressed. E-mail: epeacock{at}gov.nu.ca

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Science. ISSN 0036-8075 (print), 1095-9203 (online)