Effects of the Different Fish Meal and Wheat Flour Content in Extruded Pellet on the Growth and Apparent Digestibility for Olive Flounder Paralichthys olivaceus

Abstract

A feeding trial was carried out to investigate the effect of different fish meal and wheat flour contents in extruded pellets on the growth and apparent nutrient digestibility of olive flounder Paralichthys olivaceus. Four extruded pellets (HB1, HB1T, HB2 and HB2T) were prepared using two kinds of high quality brown fish meal and low quality tuna fish meal. Two diets (HB1 and HB2) contained two different kinds of brown fish meal, respectively; in HB1T and HB2T, we substituted 50 % of the brown fish meal with 10 % wheat flour. Three replicate groups of fish (initial body weight of 82 g) were fed the experimental pellets to visual satiation for 15 weeks. The highest weight gain was observed in fish fed HB1, and weight gain of fish fed HB2 was significantly higher than that of fish fed HB2T (P<0.05). Feeding efficiency for fish fed HB1 was significantly higher than that of fish fed HB1T and HB2T (P<0.05), but was not significantly different from fish fed HB2. Apparent dry matter digestibility in HB1 and HB2 was significantly higher than in HB1T and HB2T (P<0.05). The highest crude protein digestibility was observed in HB1, and protein digestibility in HB1T and HB2 was higher than in HB2T (P<0.05). The results of this study suggest that fish meal quality considerably affects growth and nutrient digestibility of olive flounder fed extruded pellets, and the use of HB1 is recommended over HB1T, HB2 and HB2T for efficient olive flounder production.

Advancing production of marine fish in the United States: Olive flounder, Paralichthys olivaceus, aquaculture

“…There has been a significant push in recent years to increase adoption of extruded feeds in commercial-scale olive flounder production. Such improvements, when coupled with evidence that a significant amount of the fish meal in olive flounder diets can be replaced with alternative protein sources (Bai & Lee, 2010;Hamidoghli et al, 2020;Kim et al, 2019), reveal a promising future for improved sustainability of the olive flounder aquaculture industry worldwide. Further advancements have been made in continued improvement of seedstock used in the industry through research aimed at advancing genetic selection efforts (Castaño-S anchez et al, 2010;Kang, Kim, & Lee, 2008;Shao et al, 2015).…”

Feed and Disease at Olive Flounder (Paralichthys olivaceus) Farms in Korea

“…5 Weight gain (WG, %) = (final weight − initial weight) × 100/initial weight. 6 Feed efficiency ratio (FE, %) = (wet weight gain/dry feed intake) × 100. 7 Protein efficiency ratio (PER) = wet weight gain/protein intake.…”

“…5 Raw fish feed (composed of mixed fish such as cutlass, jack mackerel, croaker, mackerel, and longsnout pricklebacks) containing 63.8% protein and 22.8% lipid. 6 Fishmeal, shrimp-, squid-, and meat-powder. 7 Soybean, gluten, and yeast.…”

“…A variety of interdisciplinary studies entailing selective breeding for improvement of growth [4,5], feed [6][7][8], and vaccine development [9][10][11][12][13] have been carried out to develop flounder as a national strategic breed. The government has been promoting the use of formulated feeds since 2004 in order to develop a sustainable aquaculture industry.…”

Apparent digestibility coefficients of animal feed ingredients for olive flounder (Paralichthys olivaceus)

“…The nutrient digestibility might be changed with the type and level of FM in olive flounder diet (Kim et al, 2019;Yoo et al, 2006). Therefore, information about the nutrient digestibility of FMs used in olive flounder diet is important to formulate cost-effective practical diets because the nutrient digestibility of ingredients can also be specific to fish species (Sugiura et al, 1998).…”