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.