Table 1.

Percentage weight ¹ of the six different by-products (intestines, gills, trimmings, head, skin) of meagre and gilthead sea bream in two different size classes.

g By-Product/100 g Fish	Large Meagre (n = 6)		Small Meagre (n = 30)		Large Gilthead Sea Bream (n = 16)		Small Gilthead Sea Bream (n = 44)		P1	P2
	Mean	SD	Mean	SD	Mean	SD	Mean	SD
Head	18.74	3.27	17.09	1.74	18.49	1.42	16.70	1.27	0.09	0.61
Gills	3.18	0.31	3.01	0.32	2.54	0.27	2.42	0.22	0.58	0.38
Intestines	5.07	0.53	7.44	0.95	4.49	0.90	5.44	0.87	<0.001	0.08
Trimmings	1.65	0.19	1.32	0.29	1.62	0.19	2.27	0.63	0.007	<0.001
Bones	8.76	3.09	6.53	0.76	4.95	0.47	5.04	0.72	0.50	<0.001
Skin	6.25	1.68	7.06	1.06	6.35	1.04	6.22	0.99	0.38	0.43
Sum	43.65	4.84	42.46	2.41	38.45	2.06	38.07	2.08	0.98	<0.001

¹ Results are presented as the mean (SD) for normally distributed variables; P₁ and P₂ denote statistical significance between the two different size classes and between the two fish species, respectively; p-values derived through independent Student’s t-test with α = 0.05.