Rana aurora occurrence and abundance were estimated from visual encounter surveys of egg masses (Heyer et al. 1994) completed between 17 February and 9 May 2012.
Twenty-one strip 15 m × 150 m transects were laid across the disturbance gradient and diurnal visual encounter surveys were conducted.
We conducted repeated, visual encounter surveys of roadside ditches during 2012 2013 and detected 25 species of amphibians and reptiles 447 times including five species of statewide conservation concern.
Overall, reliable assessment of the presence or absence of all five species at a site required four separate surveys, each using four different methods (visual encounter surveys during both day and night, dip netting and bottle-trapping).
Surveyors encountered and captured 320 R. pipiens during nocturnal calling surveys, egg mass surveys and visual encounter surveys [for details see [ 24]] and took 401 tissue samples.
The data represent recorded presences through multi-year monitoring of the territory of the park based on several methodologies (visual encounter surveys, calls surveys, search of potential shelters).
Immediately after the visit, the RA collected the audiotape and administered a post-encounter survey to patients, which asked about their use and satisfaction with GEM.
The physicians participating in our internet survey took part voluntarily after encountering survey publicity, despite the lack of any financial incentive.
Standard visual encountered surveys were used to observe reptile community in four human modified landscape (settlements, rice fields, farmland/cropland, and monoculture stands).
In search-encounter surveys, space is not sampled using fixed devices such as camera traps, but instead, space is actively searched, for example along randomly placed linear transects, or by systematically searching a plot.
