Table 1. Exposure and mortality due to anticoagulant rodenticides (AR) fishers (Martes pennanti) within the two isolated populations, northern California and southern Sierra Nevada.
Fisher population | Number of fisherstested (F:M) | Number of AR exposed fishers (F:M) | Number of AR mortalities | , SD and range in all, female (F) andmale (M) exposed fishers | Chi-square | Probability Level | DF |
Northern California | 18 (11∶7) | 13 (72%) (8∶5) | 2 | 1.38 (SD = 0.84; range1–3) (F) 1.13 (SD = 0.35;range 1–3) (M) 1.8 (SD = 0.84; range 1–3) | 0.004 | 0.952 | 1 |
Sierra Nevada | 40 (18∶22) | 33 (83%) (16∶17) | 2 | 1.70 (SD = 0.88; range1–4) (F) 1.47 (SD = 0.87;range 1–4) (M) 2.00 (SD = 0.85; range 1–4) | 0.925 | 0.336 | 1 |
All California | 58 (31∶27) | 46 (79%) (26∶20) | 4 | 1.61 (SD = 0.83; range 1–4) (F) 1.33 (SD = 0.73;range 1–4) (M) 2.00 (SD = 0.82; range 1–4) | 0.844 | 0.358 | 1 |
Heterogeneity chi-square | 0.085 | 0.77 | 1 |
Mean number ( ) of AR compounds detected per individual, range of numbers of AR per individual and standard deviation (SD) are given for all, female (F) and male (M) fishers for each population. Chi-square and heterogeneity Chi-square test analyzing exposure between the sexes both within and between the populations.