Alberta Piping Plover Predator Exclosure and Population Monitoring Program 2008
Author(s)
Amanda Rezansoff, Lance Engley and Dave Prescott
Summary
Nest predation continues to be a significant limiting factor for the Great Plains piping plover population. Previous studies conducted in east‐central Alberta and in the United States have shown that the use of predator exclosures can significantly reduce piping plover nest predation. Since 2002, predator exclosures have been applied to as many nests as possible in Alberta with the goal of increasing nest success and ultimately enhancing fledging success.
As a part of this program, annual surveys are conducted on core breeding lakes to better gauge population numbers and movement. These surveys complement the international census conducted every five years across North America and are designed to monitor changes in populations and distribution. Surveys also provide researchers with an opportunity to re‐sight piping plovers banded in Alberta in previous years, as well as those banded in other jurisdictions. The information collected from band recoveries assists wildlife managers in determining dispersal patterns, adult and juvenile survival, and complements the banding program being undertaken in Saskatchewan.
We carried out population inventories on 25 water bodies in 2008. In Alberta, 295 adults were located on 22 different water bodies and an additional 28 adults were seen on adjacent lakes surveyed in Saskatchewan. In total, 123 nests were found, of which 116 had exclosures applied to them. Exclosures were 60 cm in diameter and were made of a single length of 5 cm x 5 cm stucco wire 40 cm high. Overall, Mayfield nest success was calculated to be 75.6%, fledging success was calculated to be 32.1%, and we calculated that 1.07 chicks per pair were fledged in 2008. We banded 20 young plovers and recorded 79 piping plovers banded in previous years.
All activities carried out during the course of this project were done in support of the Alberta Piping Plover Recovery Plan, 2005‐2010 (Alberta Piping Plover Recovery Team 2006). In particular, these activities were conducted to address Section 8.2 (Productivity Enhancement), Section 8.3 (Information and Outreach) and Section 8.4 (Population Monitoring and Research) of the recovery plan.