A monitoring protocol for the enigmatic Austral Rail Rallus antarcticus.

FASOLA LAURA; GIUSTI MARÍA EMILIA; ROESLER IGNACIO; DE MIGUEL ANDRÉS; NATALIA ANDREA COSSA

Puerto Iguazú

Congreso; Ornithological Congress of the Americas; 2017

Association of Field Ornithologists, Sociedade Brasileira de Ornitologia y Aves Argentinas,

Austral Rail (Rallus antarcticus), globally vulnerable, inhabits wetlands in Argentinean and Chilean Patagonia. It was rediscovered in 1998 and the state of its populations is poorly known, so is necessary to generate monitoring protocols. The aim was to know the effect of broadcast two voices (duet and song) in two moments of the day (dawn and dusk) and the season (reproductive and post-reproductive) to the probability of detection and latency (time before first response), we conducted playback assays in Santa Cruz province, Argentina, between December 2015 and April 2016. We built Occupancy Models corrected by imperfect detection, n=30 detection histories, and Generalized Linear Models, n=55 survey points. There was no influence of moment of day and season in both parameters. Song had a bigger probability of detection and latency (0.91 and 105 sec) than duet (0.62 and 44 sec) but statistically significate in the last case (p=0.59 and p