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Science 9 February 2001:
Vol. 291. no. 5506, p. 941
DOI: 10.1126/science.291.5506.941O
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Kareiva et al. (Reports, 3 Nov. 2000, p. 977) used a population model to argue that the proposed removal of dams from the Snake River, a controversial undertaking, may not be sufficient to halt the decline toward extinction of chinook salmon. Dambacheret al. comment that if alternative estimates of one of the model parameters, first-year survival, that are consistent with published data are factored into the Kareiva et al. model, the model implies that dam breaching could indeed reverse the decline of salmon stocks. Thus, Dambacher et al. conclude, "dam breaching remains a viable recovery option for chinook salmon." Kareiva et al. respond that the first-year survival rate they used "falls within the range of documented values" for the specific stocks and period of interest, and that the adjustments applied to other variables by Dambacher et al. oversimplify the details of the Kareiva et al. model. The full text of these comments can be seen at www.sciencemag.org/cgi/content/full/291/5506/939a




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