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Estimating density of ship rats in New Zealand forests by capture- mark-recapture trapping

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Figure

Figure 1. Layout of traps used to estimate the population density of ship rats in the Orongorongo Valley, 2003–2004
Table 1. Numbers of first captures, recaptures and mortalities of ship rats caught in cage traps in three trapping sessions in the Orongorongo Valley.___________________________________________________________________________________________________________________________________
Figure 2. Frequency distributions of body mass of (a) all rats caught in live traps and (b) recaptured rats
Table 2. Estimated population size ( Nˆ ) and density ( Dˆ ) of ship rats captured in cage traps in the Orongorongo Valley, pooled over multiple sites within each year, estimated with the null model (M0) and Chao’s second coverage estimator (Mth).___________________________________________________________________________________________________________________________________
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