Partial Replacement of Fishmeal with Duckweed (Spirodela polyrhiza) in Feed for Two Carnivorous Fish Species, Eurasian Perch (Perca fluviatilis) and Rainbow Trout (Oncorhynchus mykiss)

Table 2

Proximate composition of feed ingredients (on dry matter basis).

	DM (g·kg^−1 FM)	CP (g·kg^−1 DM)	CL (g·kg^−1 DM)	CA (g·kg^−1 DM)	NFE (g·kg^−1 DM)	CF (g·kg^−1 DM)	GE (kJ·g^−1 DM)
Fishmeal	929	671	91.5	234	4.30	n.d	18.8
DWD perch	950	350	42.1	189.5	418.4	n.d	17.9
DWD trout	937	372	32.0	202	298	96.1	15.6
DWF perch	900	275	44.4	200	480.6	n.d	17.6
DWF trout	959	331	44.8	142	380	103	16.8
Wheat gluten	932	868	64.4	8.60	59.9	3.20	23.2
PBM	940	745	106	95.7	53.2	n.d	22.0
Wheat flour	887	149	21.4	16.9	813	22.5	20.4
Potato starch	810	0.00	0.00	1.60	998.4	0.00	19.9
Alpha-cellulose	950	0.00	0.00	0.00	0	100	20.0

FM: fresh matter, DM: dry matter, CP: crude protein, CL: crude lipid, CA: crude ash, NFE: nitrogen free extract, CF: crude fiber, GE: gross energy, DWD: dried duckweed, DWF: fermented duckweed, and PBM: poultry by-product meal.