The pitfalls of pitfalls: a comparison of pitfall trap catches and absolute density estimates of epigeal invertebrate predators in Arable Land

By A. Lang. Anzeiger Fur Schadlingskunde-journal of Pest Science, 2000

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Non-native plantation forests as alternative habitat for native forest beetles in a heavily modified landscape (2008, background): “As with all passive trapping systems, such as malaise or flight interception trapping, capture rates in pitfall traps represent an integrated measure of local density and wider-scale activity rates, and cannot necessarily be used as a direct measure of local population density (Southwood 1994; Lang”
Harvestman (Arachnida: Opiliones) species distribution along three Neotropical elevational gradients: an alternative rescue effect to explain Rapoport's rule? (2006, background): “Thus we seek to avoid bias due to differences in mobility and vagility between species, which is known to occur in passive methods such as pitfall traps (Adis, 1979; Lang, 2000).”