Canadian pitfall trap
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The ramp trap appeared to be the method of choice for sampling epigeal spiders. The species compositions of the ramp trap and the Nordlander trap were different from those of the other trap types, but these traps were more efficient, capturing more species per individual captured. The shallow pitfall trap and the funnel trap captured a carabid beetle and spider fauna similar to that captured by the conventional trap. All modifications to the conventional trap design resulted in a reduction in both small mammal and amphibian captures. We also examined the effect of a mesh screen over pitfall traps on carabid beetle and vertebrate catches. We compared the carabid, spider, and vertebrate captures within five pitfall trap types (conventional trap, funnel trap, shallow trap, Nordlander trap, and the ramp trap) to determine the trap type that would reduce vertebrate incidental catch without compromising the capture of invertebrates. However, they often result in high levels of mortality for small mammals and amphibians. 18: 2013: Tenyear responses of grounddwelling spiders to retention harvest in the boreal forest. JAC Bergeron, JR Spence, WJA Volney, J Pinzon, DJ Hartley. Pitfall traps containing a preservative have become the standard method of sampling for epigeal invertebrates such as carabid beetles and cursorial spiders. Effect of habitat type and pitfall trap installation on captures of epigaeic arthropod assemblages in the boreal forest. The Canadian Entomologist 137: 233 - 250.
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When the animal moves the trigger, which may have bait on or near it, the rock or log falls, crushing the animal. A deadfall is a heavy rock or log that is tilted at an angle and held up with sections of branches, with one of them serving as a trigger. Pitfall trap designs to maximize invertebrate captures and minimize captures of nontarget vertebrates. A small Paiute-style deadfall trap, made with dogbane cordage.