A Model of the Effect of Environmental Variables on the Presence of Otters along the Coastline of the Isle of Skye

Table 3

Categorical variables recorded during the survey of the distribution of otters on the Isle of Skye.

Parameter	Category
Geology (G)	1 = Lewisian/Moine
	2 = Torridonian
	3 = Cambrian
	4 = Mesozoic
	5 = Tertiary Lavas
	6 = Tertiary Intrusive
	7 = Landslip
The dominant boulder size in each 500 m section	1 >20 cm
	2 <20 cm
Intertidal makeup (I)	1 = muddy
	2 = sandy
	3 = shingle
	4 = boulder
	5 = rock outcrop
Inland vegetation (V)	1 = heather
	2 = scrub
	3 = grassland
	4 = native wood
	5 = plantation