Biological Estimation of Waste Products from Olive Flounder (Paralichthys olivaceus) Fed on Three Different Feed Types

다국어 초록 (Multilingual Abstract)

Waste products were biologically estimated from juvenile flounder (Paralichthys olivaceus) on three diet types—raw fish-based moist pellets, moist pellets, and extruded pellets. Total solid and soluble wastes were estimated by determining nutrient digestibility and accumulation in juvenile flounders through growth trials. Total solid wastes produced were 20%-23% of the organic matter supplied. Soluble excretions ranged from 45% to 49%. Soluble nitrogenous excretions ranged from 36.4% to 46.2%. These results indicate that about 30.2%-35.9% of supplied feed is retained in the fishes’ bodies while the remainder of feed is excreted into culture systems or the surrounding environment.

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