Impact of Diets Containing Plant Raw Materials as Fish Meal and Fish Oil Replacement on Rainbow Trout (Oncorhynchus mykiss), Gilthead Sea Bream (Sparus aurata), and Common Carp (Cyprinus carpio) Freshness

Table 4

QIM scheme developed for rainbow trout (Oncorhynchus mykiss).

Feature	Description	Score
Skin
Colour/appearance	Pearl-shiny all over skin	0
	Less shiny, slight pink discoloration on the side	1
	Less shiny, pink-red discoloration on the side & gill cover	2
	Less shiny, red-brown discoloration on the side & gill cover	3
Mucus	Clear not clotted	0
	Milky & clotted or	1
	Yellow & clotted	2
Odour	Fresh, seaweed, cucumber	0
	Neutral to metal, dry grass, corn	1
	Sour	2
	Rotten	3
Eyes
Pupils	Clear & black, metal shiny	0
	Lightly opaque	1
	Mat, grey	2
Form	Flat	0
	Little sunken	1
	Sunken	2
Abdomen
Colour	White	0
	Yellowish	1
Odour	Neutral	0
	Corn	1
	Sour	2
	Rotten	3
Gills
Colour/appearance	Red/dark brown	0
	Light red/pink/brown	1
	Grey-brown/grey/green	2
Mucus	Transparent	0
	White or dry	1
	Yellow clotted	2
Odour	Fresh seaweed	0
	Neutral- metal	1
	Sour	2
	Rotten	3
Texture
Elasticity	Finger mark disappears immediately	0
	Finger leaves mark over 3 s	1
Total demerit score		24