They also can yield data on relative abundances and habitat use of selected species.
Pitfall traps arrayed in a grid without fences can also be used to study the population ecology and habitat use of selected species. Population density can be estimated with this latter technique if used in conjunction with mark-recapture techniques see Chapter 8. Drift fence arrays or pitfall grids can be left in place for long-term monitoring.
Table of Contents
In this section, I discuss the use of this technique to obtain data on amphibians away from breeding ponds. Use of drift fences and traps to monitory amphibian activity at breeding ponds is discussed in the section "Drift Fences Encircling Breeding Sits", below technique 9.
One widely used method for sampling terrestrial fauna is traps with drift fences. Such drift fences, however, may be configured in several arrays, varying the height, length of the fence, space between conjugated traps e. Consequently, some criticism arose questioning which drift fence arrangement should be employed.
- The Fort Sage Drift Fence, Washoe County, Nevada. Anthropological papers of the AMNH ; v. 58, pt. 2;
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Therefore, we made use of geometrical models to test the probability of capturing terrestrial tetrapods as model organisms using traps associated along with both I and Y drift fence arrays. Besides this, we also present data that may enable field ecologists to better decide the minimum distance between two traps with drift fences, ensuring accurate statistics.
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