Increased Behavioral Variation and the Calculation of Release Numbers for Reintroduction Programs
dc.contributor.author | McPhee, M. Elsbeth | en_US |
dc.contributor.author | Silverman, Emily D. | en_US |
dc.date.accessioned | 2010-06-01T18:22:31Z | |
dc.date.available | 2010-06-01T18:22:31Z | |
dc.date.issued | 2004-06 | en_US |
dc.identifier.citation | McPHEE, M. ELSBETH; SILVERMAN, EMILY D. (2004). "Increased Behavioral Variation and the Calculation of Release Numbers for Reintroduction Programs." Conservation Biology 18(3): 705-715. <http://hdl.handle.net/2027.42/71584> | en_US |
dc.identifier.issn | 0888-8892 | en_US |
dc.identifier.issn | 1523-1739 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/71584 | |
dc.description.abstract | Captive populations can exhibit more behavioral variation than their wild counterparts as a result of relaxed selective pressures in the captive environment. This increased variation can translate into decreased survivorship upon reintroduction to native habitats. Data show that captive populations of oldfield mice ( Peromyscus polionotus subgriseus ) exhibit such an increase in variation. Motivated by these results, we developed a series of calculations for a “release ratio” that can be used to determine the number of captive-bred animals needed to compensate for the increased variance. We present calculations of release ratios for behavioral and morphological variables with different distributions and illustrate the functional relationship between release numbers, increased variation, and change in average behavior and morphology. Our calculations indicated that the release of 130–150 captive-bred oldfield mice is equivalent to the release of 100 wildlike animals. Release ratios will vary among species, however, and perhaps among different populations of the same species and should be calculated separately for each situation. Development of the release ratio is the first rigorous effort to incorporate behavioral and morphological changes due to captivity into reintroduction planning. Release ratios will help conservation biologists ensure that the appropriate number of animals is released, thus increasing the success of reintroduction programs. | en_US |
dc.format.extent | 285054 bytes | |
dc.format.extent | 3109 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.publisher | Blackwell Publishing Inc | en_US |
dc.rights | The Journal of the society for Conservation Biology | en_US |
dc.title | Increased Behavioral Variation and the Calculation of Release Numbers for Reintroduction Programs | en_US |
dc.type | Article | en_US |
dc.subject.hlbsecondlevel | Ecology and Evolutionary Biology | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | School of Natural Resources and Environment, University of Michigan, 430 E. University, Ann Arbor, MI 48109–1115, U.S.A. | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/71584/1/j.1523-1739.2004.00478.x.pdf | |
dc.identifier.doi | 10.1111/j.1523-1739.2004.00478.x | en_US |
dc.identifier.source | Conservation Biology | en_US |
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dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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