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    Author(s): Howard B. Stauffer; Cynthia J. Zabel; Jeffrey R. Dunk
    Date: 2005
    Source: In: Ralph, C. John; Rich, Terrell D., editors 2005. Bird Conservation Implementation and Integration in the Americas: Proceedings of the Third International Partners in Flight Conference. 2002 March 20-24; Asilomar, California, Volume 2 Gen. Tech. Rep. PSW-GTR-191. Albany, CA: U.S. Dept. of Agriculture, Forest Service, Pacific Southwest Research Station: p. 787-794
    Publication Series: General Technical Report (GTR)
    Station: Pacific Southwest Research Station
    PDF: View PDF  (1.0 MB)

    Description

    We compared a set of competing logistic regression habitat selection models for Northern Spotted Owls (Strix occidentalis caurina) in California. The habitat selection models were estimated, compared, evaluated, and tested using multiple sample datasets collected on federal forestlands in northern California. We used Bayesian methods in interpreting Akaike weights calculated for the estimated models. This approach combines Akaike weights with prior probabilities to provide posterior probabilities for the set of competing models for each dataset. This process can be iterated with multiple sample datasets to calculate a succession of posterior probabilities that provide revised assessments of the relative credibility of the models. The posterior probabilities also provide weights for model averaging. They can be used to measure the importance of the covariates in the models, and they provide the weights for model averaging of the predictive values and estimates of the coefficients of the covariates, along with error. This approach offers a robust solution to modeling habitat associations, providing a more realistic assessment of error and uncertainty in the results. We illustrate these methods with sample datasets for the Northern Spotted Owl in California.

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    Citation

    Stauffer, Howard B.; Zabel, Cynthia J.; Dunk, Jeffrey R. 2005. Application of Bayesian methods to habitat selection modeling of the northern spotted owl in California: new statistical methods for wildlife research. In: Ralph, C. John; Rich, Terrell D., editors 2005. Bird Conservation Implementation and Integration in the Americas: Proceedings of the Third International Partners in Flight Conference. 2002 March 20-24; Asilomar, California, Volume 2 Gen. Tech. Rep. PSW-GTR-191. Albany, CA: U.S. Dept. of Agriculture, Forest Service, Pacific Southwest Research Station: p. 787-794

    Keywords

    AIC, Akaike weights, Bayesian methods, habitat selection modeling, model averaging, Northern Spotted Owls, posterior probabilities, prior probabilities.

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