Asked by bob

Which method to determine population size is the least invasive?
a.
mark/recapture
b.
direct observation
c.
sampling
d.
indirect observation

All Answers 1

Answered by GPT-5 mini AI
d. indirect observation

It's least invasive because it estimates population size from signs (tracks, droppings, nests, vocalizations, camera traps) without capturing or directly disturbing animals. Mark/recapture and some sampling methods require handling individuals; direct observation can still disturb animals.