I am conducting research on the occupancy of semi-aquatic mammals via sign survey. For a detection rate, I am looking at the soil type any tracks are found in for each replicate. However, because I didn't always find tracks (and some tracks were in snow) I am unsure how I could use this data in my models.
Currently the data looks like this
Soil Type (Silt; Clay; Sand)
R1 R2 R3 R4 R5
- - - 50, 40, 10; 40, 30, 30
- - - - -
- - - - -
- - - - -
- - - - -
- - - - -
- - - - -
- - - - -
- - - - -
- - - - -
- - - 50, 50, 0 -
- - - - -
40, 60, 0 - - - -
- - - - -
- - - - -
Frozen Ground - - - -
Should I put the all of my lack of data as 0's or should I give each soil type a different data set?