Digestible Energy Intake and Digestive Efficiency of Human-Managed North American River Otters (Lontra canadensis)

Table 3

Nutrient content (dry matter basis) of the commercially available fish fed in the diet trials for eight captive North American river otters (Lontra canadensis) held at three North Carolina institutions.

Diet component	DM (%)	Gross energy (cal/g)	Crude protein (%)	Crude fat (%)
Capelin (whole)	12.15	5136	77.1	11.3
Catfish (whole)	18.29	6955	39.2	56.0
Mackerel (whole)	24.71	5526	74.2	15.1
Mullet (whole)	16.36	5481	58.6	28.9
Perch (fillet)	3.31	5166	74.5	14.2
Salmon (fillet)	12.05	5400	88.6	9.3
Smelt (whole)	8.65	5830	69.5	20.6
Tilapia (fillet)	9.36	5468	89.0	9.9
Trout (whole)	12.87	5865	60.8	27.9