Palila abundance estimates and trend

Author:

Camp, Richard J., Banko, Paul C.

Title:

Palila abundance estimates and trend

Periodical:

Hawaii Cooperative Studies Unit Technical Report

Year:

2012

Pages:

10

Subject:

Palila Loxioides bailleui Endangered species birds

Summary:

The aim of this report is to update abundance estimates for the Palila based on the 2012 surveys. We assess Palila trends over two periods: 1) the long-term trend during 1998 –2012 and 2) the short-term trajectory between 2003 and 2012. The first period evaluates the population trend for the entire time series since additional transects were established (Johnson et al. 2006). These additional transects were established to produce a more precise population estimate and provide more complete coverage of the Palila range. The initial year for short-term trajectory was chosen subjectively to coincide with the recent decline in the Palila population. Additionally, stations in the core Palila habitat were surveyed on two occasions in 2012, thus allowing us to address the question of how repeat samples improve estimate precision.

URL:

http://hdl.handle.net/10790/2630

Date:

October 2012

Collection:

Monographs