College of Fisheries, Hubei Provincial Engineering Laboratory for Pond Aquaculture, Huazhong Agricultural University, 1 Shizishan Street, Wuhan, 430070, People's Republic of China.
Department of Livestock and Fisheries, Ministry of Agriculture and Forestry, Vientiane, Lao PDR.
Fish Physiol Biochem. 2021 Apr;47(2):203-212. doi: 10.1007/s10695-020-00905-6. Epub 2021 Jan 6.
This study investigated the effect of stocking density on growth performance, blood biochemical profiles, antioxidative capacity, and muscle quality of gibel carp (Carassius gibelio). Gibel carps (initial body weight 57.04 ± 1.89 g) were reared at high stocking density (HSD, 10.85 kg m), medium stocking density (MSD, 5.06 kg m), and low stocking density (LSD, 1.47 kg m) for 60 days. The LSD group exhibited the highest growth rate, while HSD significantly inhibited fish growth. The muscular compositions of crude fat, crude ash, and moisture were significantly changed by stocking density, but crude protein content did not differ significantly. The stocking density altered the muscular texture profiles of gibel carp. Compared to either the HSD group or the MSD group, the highest levels of resilience and springiness occurred in the LSD group. Significant differences were observed in the levels of plasma glucose, alanine aminotransferase, aspartate aminotransferase, cholesterol, and creatinine among three groups. The fish exhibited the highest level of plasma cortisol as well as the lowest levels of triiodothyronine and thyroxine in the HSD group. The fish stocked in the LSD group showed the highest activities of superoxide dismutase, glutathione peroxidase, and catalase as well as the highest content of glutathione in liver. The significant highest total antioxidant capacity occurred in the fish stocked in the LSD group. The results showed that HSD resulted in chronic crowding stress, and exerted negative impact on growth performance, muscle quality, and antioxidative capacity of gibel carp.
本研究探讨了放养密度对吉富罗非鱼（Carassius gibelio）生长性能、血液生化指标、抗氧化能力和肌肉品质的影响。吉富罗非鱼（初始体重 57.04±1.89 g）分别在高密度（HSD，10.85 kg/m³）、中密度（MSD，5.06 kg/m³）和低密度（LSD，1.47 kg/m³）下养殖 60 天。LSD 组表现出最高的生长率，而 HSD 显著抑制了鱼类的生长。放养密度显著改变了粗脂肪、粗灰分和水分的肌肉组成，但粗蛋白含量没有显著差异。放养密度改变了吉富罗非鱼的肌肉质地特性。与 HSD 组或 MSD 组相比，LSD 组的弹性和回弹性最高。三组间血浆葡萄糖、丙氨酸转氨酶、天冬氨酸转氨酶、胆固醇和肌酐水平存在显著差异。HSD 组鱼的血浆皮质醇水平最高，三碘甲状腺原氨酸和甲状腺素水平最低。LSD 组鱼的超氧化物歧化酶、谷胱甘肽过氧化物酶和过氧化氢酶活性最高，肝中谷胱甘肽含量最高。LSD 组鱼的总抗氧化能力显著最高。结果表明，HSD 导致慢性拥挤应激，对吉富罗非鱼的生长性能、肌肉品质和抗氧化能力产生负面影响。
