Different Starch Sources Affect the Growth Performance and Hepatic Health Status of Largemouth Bass (Micropterus salmoides) in a High-Temperature Environment.

Huang, Dongyu; Gu, Jiaze; Xue, Chunyu; Zhang, Lu; Chen, Xiaoru; Wang, Yongli; Liang, Hualiang; Ren, Mingchun

Simple Summary: This experiment was conducted to investigate the effects of different starch sources on the growth performance and hepatic health of largemouth bass in a high-temperature environment. The largemouth bass were fed the experimental diet for 45 days. In this study, wheat starch resulted in better growth performance in largemouth bass in a high-temperature environment and had a positive effect on the antioxidant status of largemouth bass liver under high-temperature conditions. In conclusion, wheat starch is more suitable than corn starch, tapioca starch, sweet potato starch, and potato starch for largemouth bass, based on the growth performance, survival rate, liver pathology, hepatic antioxidant capacity, and immune response analyses. The experiment was designed to investigate the effects of different starch types on the growth performance and liver health status of largemouth bass in a high-temperature environment (33–35 °C). In this study, we designed five diets using corn starch (CS), tapioca starch (TS), sweet potato starch (SPS), potato starch (PS), and wheat starch (WS) as the starch sources (10%). We selected 225 healthy and uniformly sized largemouth bass (199.6 ± 0.43 g) and conducted the feeding experiment for 45 days. The results showed that the WS group had the highest WGR, SGR, and SR and the lowest FCR. Among the five groups, the WS group had the highest CAT activity, SOD activity, and GSH content, while the SPS group had the highest MDA content. Furthermore, oil red O staining of liver samples showed that the TS group had the largest positive region, indicating high lipid accumulation. Lastly, the gene expression results revealed that compared with the WS group, the CS, TS, and SPS groups showed suppressed expression of nrf2, keap1, cat, sod, gpx, il-8, and il-10. Therefore, our results demonstrated the effect of different starch sources on largemouth bass growth performance and hepatic health in a high-temperature environment.

LARGEMOUTH bass; WHEAT starch; CORNSTARCH; STARCH; STAINS & staining (Microscopy); TAPIOCA; SWEET potatoes

Animals (2076-2615), 2023, Vol 13, Issue 24, p3808

2076-2615

Academic Journal

10.3390/ani13243808