Application of poultry by‐product meal in diets of obscure pufferfish ( Takifugu obscurus )

Abstract

The relative shortage of fishmeal is challenging the sustainable development of aquaculture industry. A 56‐day feeding trial was conducted to evaluate the efficacy of fishmeal replacement by poultry by‐product meal (PBM) in juvenile obscure pufferfish. The basal diet with 45% (dry matter) fishmeal was used as the control diet, and in the four experimental diets PBM was added into the control diet to replace fishmeal at the level of 15% (PBM15), 30% (PBM30), 45% (PBM45) and 60% (PBM60) respectively. Each diet was fed to triplicate tanks, each of which was stocked with 30 fish. PBM30 did not significantly affect the growth performance, nutrient apparent digestibility coefficient, proximate composition, amino acid profile, muscle texture and serum biochemical indices (p > 0.05). PBM45 did not significantly (p > 0.05) affects the weight gain, but reduced the feed efficiency ratio (p < 0.05). PBM60 resulted in significantly reduced fish growth (p < 0.05). PBM‐supplemented diets resulted in lower contents of long chain‐polyunsaturated fatty acid in the liver, but higher deposition of C18:1n‐9 and C18:2n‐6 in experimental fish (p < 0.05). In conclusion, replacing 30% fishmeal with PBM in the diet did not compromise the growth performance, feed utilisation, health status and muscle texture of farmed obscure pufferfish.

Combined Replacement of Fishmeal and Fish Oil by Poultry Byproduct Meal and Mixed Oil: Effects on the Growth Performance, Body Composition, and Muscle Quality of Tiger Puffer

“…As mentioned above, PBM can replace 25%–70% of FM in fish feeds, while PO can replace FO at higher levels (usually 30%–100%). Low percentage replacement of dietary FM by PBM also had no significant effect on the growth of gilthead sea bream ( Sparus aurata , <50% replacement) [ 52 , 53 ], gibel carp ( Carassius auratus gibelio , <50% replacement) [ 54 ], cuneate drum ( Nibea miichthioides , <50% replacement) [ 55 ], and obscure pufferfish (<30% replacement) [ 11 ]. Complete FO replacement by PO had no significant effect on the growth of brown trout ( Salmo trutta ) [ 25 ], pacific white shrimp ( Litopenaeus vannamei ) [ 56 ], largemouth bass ( Micropterus salmoides ) [ 27 ], and barramundi ( Lates calcarifer ) [ 57 ].…”

“…Among the terrestrially sourced ingredients, poultry byproducts, including poultry byproduct meal (PBM), and poultry oil (PO), have been widely used in aquafeeds. Previous studies showed that the PBM can replace 25%–70% of FM in fish feeds: 25% for large yellow croaker ( Larimichthys crocea ) [ 9 ] and tench ( Tinca tinca ) [ 10 ], 30% for pufferfish ( Takifugu obscurus ) [ 11 ] and black sea bream ( Acanthoparus schlegelii ) [ 12 ], 50% for Atlantic salmon ( Salmo salar ) [ 13 ], black sea turbot ( Psetta maeoticus ) [ 14 ], and European eel ( Anguilla anguilla ) [ 15 ], 40%–60% for hybrid grouper ( Epinephelus fuscoguttatus ♀ × Epinephelus lanceolatus ♂) [ 16 ], and 67% for rainbow trout ( Oncorhynchus mykiss ) [ 17 ].…”