Abstract

An analysis of capture-recapture data is tailored to the biological characteristics of the female northern spotted owl (Strix occidentalis caurina) by conditioning female capture on capture of paired males. This procedure is relevant for animals such as the northern spotted owl where field studies indicate that capture of females generally is dependent on capture of their mates. Application of the method to data collected in Washington State suggests that survival rates for adult females have remained constant over the time span of our data, 1990-1997.

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