Search for: [Description = "An experiment was carried out on a 4 ha, foot\-shaped, Crabapple Island\: at the most distant places \(270 m\) two trap lines were set. After 5 days of trapping \(The CMR method was used\) the lines were replaced by a grid with traps that uniformly covered the entire island area. The grid was used during 7 days. The trap lines revealed 13 individuals, through there were 87 individuals shown by the grid method. The results obtained with the lines misestimated the population structure\: immatures were not caught, through there were 32 of them\; the sex ratio among mature individuals revealed by the trap lines was 6 males to 7 females, whereas the sex ratio from the grid method was 21 to 34."]

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