This reliable, easy to use product enables customer selected time-based or flow proportional sampling methods with adjustable bite sizes to fill a 300cc or 500cc sample cylinder over a given time period.
In the latter case, the main conclusions drawn from these studies were that a better representation of the pattern of variation present in the total collection was obtained with the proportional sampling. The range of variation present in the whole collection was maximized when constant or logarithmic sampling were used.
The three species that we modeled to settle randomly, upland sandpiper (Bartramia longicauda), Henslow's sparrow (Ammodramus henslowii) and eastern meadowlark (Sturnella magna), had positive relationships between occurrence and field size when a complete census or proportional sampling was used, and therefore, would have been considered area sensitive by the methods used by some previous authors.
([dagger]) For the proportional sampling variance simulations this column represents the value of c for a given simulation; for the constant coefficient of variation simulations this column represents the value of CV for a given simulation.