Power to Detect Trends in Marbled Murrelet Breeding Populations Using Audiovisual and Radar Surveys


We used pilot data collected in 2001–2004 to compare the power of radar and audiovisual survey approaches to detect trends in breeding population size and differences in trends between populations of marbled murrelets (Brachyramphus marmoratus) in northwestern California. Radar counts of murrelets were almost triple in inland Reserves than in Conservation… (More)


11 Figures and Tables