Comment on 'Are survival rates for northern spotted owls biased?'

Canadian Journal of Zoology
Reply by Loehle and Irwin see Canadian Journal of Zoology 84(9): 1380?1382 (2006) 6644_Franklin.pdf
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Loehle et al. recently estimated survival rates from radio-telemetered northern spotted owls (Strix occidentalis caurina (Merriam, 1898)) and suggested that survival rates estimated for this species from capture-recapture studies were negatively biased, which subsequently resulted in the negatively biased estimates of rates of population change (lambda) reported by Anthony et al. (Wildl. Monogr. No. 163, pp. 1-47 (2006)). We argue that their survival estimates were inappropriate for comparison with capture-recapture estimates because (i) the manner in which they censored radio-telemetered individuals had the potential to positively bias their survival estimates, (ii) their estimates of survival were not valid for evaluating bias, and (iii) the size and distribution of their radiotelemetry study areas were sufficiently different from capture-recapture study areas to preclude comparisons. In addition, their inferences of negative bias in rates of population change estimated by Anthony et al. were incorrect and reflected a misunderstanding about those estimators.
Publication type Article
Publication Subtype Journal Article
Title Comment on 'Are survival rates for northern spotted owls biased?'
Series title Canadian Journal of Zoology
Volume 84
Issue 9
Year Published 2006
Language English
Contributing office(s) Patuxent Wildlife Research Center
Description 1375-1379
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Canadian Journal of Zoology
First page 1375
Last page 1379
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