基于孵化率探究长江鲟卵质差异因子

EXPLORING FACTORS AFFECTING THE QUALITY OF ACIPENSER DABRYANUS EGGS BASED ON HATCHING RATE

  • 摘要: 鲟类卵子质量与孵化率密切相关, 为探究不同孵化率下长江鲟(Acipenser dabryanus)卵的卵质差异因子, 对长江鲟卵水分、总脂、碱性磷酸酶(AKP)、苹果酸脱氢酶(MDH)活力、维生素A (VA)、维生素E (VE)、卵黄蛋白(Vn)含量及氨基酸和脂肪酸组成进行测定及分析, 并进行孵化率和各指标间的相关性分析。结果显示, 不同孵化率长江鲟卵内水分、总脂均未出现显著差异(P>0.05), 总脂含量与孵化率呈现正相关趋势。卵总蛋白浓度在不同孵化率下不显著(P>0.05), 但Vn浓度与孵化率表现出显著正相关(P<0.05)。AKP和MDH结果显示均与孵化率显著相关(P<0.05)。维生素A及维生素E含量同样表现出与孵化率显著正相关(P<0.05)。氨基酸组成和含量结果显示, 氨基酸并未与孵化率表现出显著的相关性, 但随着孵化率的升高, 必需氨基酸及非必需氨基酸总量均表现出上升的趋势。脂肪酸结果表明C18﹕0、C18﹕1、C20﹕1、n-3多不饱和脂肪酸(n-3 PUFA)、二十二碳六烯酸(DHA)和花生四烯酸(ARA)含量随着孵化率的变化表现出显著差异(P<0.05)。相关性分析结果显示AKP、ARA、MDH、VE和n-3 PUFA与孵化率有较好的相关性(R>0.8)。以上结果表明这些物质可能具有成为卵质标志物的潜力, 可为长江鲟卵质提升及卵质评估标准体系的建立提供数据支撑。

     

    Abstract: The quality of sturgeon eggs is pivotal for achieving successful hatching rates, in order to explore the factors influencing the egg quality of Acipenser dabryanus under different hatching rates, we conducted a comprehensive analysis encompassing water content, total lipids, alkaline phosphatase (AKP), malate dehydrogenase (MDH) activity, vitamin A (VA), vitamin E (VE), vitellogenin (Vn) content, as well as amino acids and fatty acids compositions. Correlation analysis were performed between each parameter and hatching rate. The results showed that fundamental components such as water content and total lipids did not exhibit significant differences (P>0.05), however, a positive correlation trend was observed between total lipid content and hatching rate. While the concentration of total egg proteins remained consistent across different hatching rates (P>0.05), Vn concentration exhibited a significant positive correlation with hatching rate (P<0.05). Both AKP and MDH activities showed significant correlations with hatching rate (P<0.05). Moreover, vitamin A and vitamin E contents exhibited significant positive correlations with hatching rate (P<0.05). Analysis of amino acid composition and content indicated that most amino acids did not show significant correlations with hatching rate, but the total amounts of essential and non-essential amino acids demonstrated an increasing trend with higher hatching rates. Fatty acid analysis revealed significant differences in the content of C18﹕0, C18﹕1, C20﹕1, n-3 polyunsaturated fatty acids (n-3PUFA), docosahexaenoic acid (DHA), and arachidonic acid (ARA) with changing hatching rates (P<0.05). Correlation analysis demonstrated a strong correlation (R>0.8) between AKP, ARA, MDH, VE, and n-3PUFA with hatching rate. These findings suggest that these substances may serve as potential markers for egg quality, providing valuable data support for improving Acipenser dabryanus egg quality and establishing an egg quality assessment system.

     

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