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Studies on the effects of bait and sampling intensity on trapping and estimating Wood mice, Apodemus sylvaticus
Author(s) -
Gurnell J.
Publication year - 1976
Publication title -
journal of zoology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.915
H-Index - 96
eISSN - 1469-7998
pISSN - 0952-8369
DOI - 10.1111/j.1469-7998.1976.tb02265.x
Subject(s) - apodemus , biology , trapping , sampling (signal processing) , trap (plumbing) , population , wood mouse , population density , woodland , ecology , mark and recapture , zoology , environmental science , demography , filter (signal processing) , sociology , computer science , computer vision , environmental engineering
The effects of baiting a Longworth trap with whole oats and the density of traps on an area, or sampling intensity, on trapping and estimating Wood mice were studied on two neighbouring woodland plots in November 1971. Standard capture‐mark‐recapture (CMR) methods were used for two weeks followed by five nights of removal trapping. The presence of bait significantly increased the likelihood of capturing marked and unmarked animals. By increasing the sampling intensity a greater proportion of the population was sampled, although the number of animals captured per trap night decreased. These results have been related to the “effective” number of traps on an area. Observations on population structure, weather, movement and capturing marked and unmarked animals have been made. CMR population estimates closely resembled the cumulative number of individuals captured in each study and were for the main part lower than the estimates from the removal trapping carried out at the end of the studies.