Abstract
Simple SummaryLivers from meat geese are popular in China for different kinds of dishes. High-frequency electrical stunning (ES) was suggested to improve chicken meat quality in previous studies. Limited research has been performed on the effect of ES on liver quality of the meat goose. This study was performed to evaluate the effects of different current intensities on lipid oxidative stability and antioxidant capacity in the liver of Yangzhou goose (a typical meat goose) based on a typical high-frequency level (500 Hz). Stunning each goose with the current intensity at 60 V/40 mA improved lipid oxidative stability and antioxidant capacity from day 0 to day 4 and the lightness at day 0 in the liver of meat geese during cold storage. A combination of 60 V/40 mA/ 500 Hz/ 10 s per bird could be applied in the ES of Yangzhou geese in order to improve the lipid oxidative stability and antioxidant capacity in the livers.Limited research has been performed to evaluate the effects of high-frequency electrical stunning (ES) methods on the lipid oxidative stability of the meat goose livers. This study was conducted to evaluate the effects of high-frequency-ES current intensities on lipid oxidative stability and antioxidant capacity in the liver of Yangzhou goose (Anser cygnoides domesticus). Forty 92-day-old male Yangzhou geese were randomly divided into five treatments (n = 8). Geese were not stunned (control) or exposed to ES for 10 s with alternating current (AC) at 500 Hz in a water bath. Current intensities were set at 30 V/20 mA (E30V), 60 V/40 mA (E60V), 90 V/70 mA (E90V), or 120 V/100 mA (E120V), respectively. The malondialdehyde level at day 0 was the highest in 120 V (p < 0.05). Antioxidant enzymes’ activity on day 2 was the highest in E60V. The 1, 1-diphenyl-2-picrylhydrazyl free radical (DPPH·) elimination ability was lower in the E120V than that in the E60V at two days and four days postmortem (p < 0.05). A combination of 60 V/40 mA/ 500 Hz/ 10 s per bird could be applied in the ES of Yangzhou geese to improve the lipid oxidative stability and antioxidant capacity in the livers.
Highlights
Goose is an important poultry food resource in China
The Yangzhou goose is a typical meat goose that refers to a category of goose species that are raised for the primary purpose of meat production
The MDA level of liver was higher at 0 days postmortem in treatment E120V than that in other electrical treatments (p < 0.01)
Summary
Goose is an important poultry food resource in China. According to the latest survey, the number of meat goose in China was predicted to exceed 500 million in 2019 [1], producing approximately 1000 tons of liver from meat geese (meat goose liver) every year. Meat goose liver is popular in China in a variety of dishes (e.g., stewed livers, fried livers, etc.). The meat goose liver is different from foie gras ( called fatty liver), which is produced mainly by overfeeding of Landes geese [2]. The meat goose liver is cheaper than foie gras; ordinary people in developing countries like China can afford it. Its production process does not involve overfeeding, being acceptable on animal welfare grounds
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