No negative effects were found on scavenging activity in the three organs, in fish fed SPKM diet as compared to the control.
The carcass and muscle compositions were closely similar across the four dietary treatments, with only small improvements fromthe SPKMand the SMPKMdiets in terms of carcass moisture and ash, and muscle protein and RNA/protein ratio.
No differences were observed in the enthalpy responses of muscle actin and myosin between the four dietary treatments, but an inducible protein peak was found only in the fish fed with SPKM.
Overall, these findings indicate that water soaking or soaking followed by microwave irradiation improved the nutritional quality of the PKM-containing diet.
Practically, the simple low-cost modification bywater soaking has wide application potential in the administration of aquafeed.