Census and Esimates

RAP

rapid assessment programs

indices

indicate presense, not absense or abundance

nests, dens, caches, feathers, tracks, scats, hair

Difference between Lincoln-Petersen and Schable

The number of capture sessions; Schnabel requires more than two sessions.

Two basic ways of determining population size

population estimation

head counts

EIA

evironmental impact assessments

Lincoln-Petersen Index

2 trapping sessions

First Capture = M

caught again = R

total caught section session = C

total # of individuals = N

Schnable method

S = number of smaple sessions

Ci = number of animabls in ith sample

Ri = number of marked animals in ith sample = recaptures

Ui = number of animals marked for the first time

Mi = number of animals marked prior to the ith sample

bio blitz

capture and ID as many organisms as possible