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首页> 外文期刊>Marine ecology progress series >Biochemical composition and condition in anchovy larvae Engraulis encrasicolus during growth
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Biochemical composition and condition in anchovy larvae Engraulis encrasicolus during growth

机译：during鱼幼虫生长期间的生化组成和状况

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Growth and condition of larval Engraulis encrasicolus larvae in the Bay of Biscay were analysed relative to their biochemical composition. Protein, carbohydrate, lipid, DNA and RNA contents of larvae were quantified during larval ontogeny to analyse changes associated with growth. Proteins were the main organic component of E. encrasicolus at every larval stage, followed by lipids and carbohydrates. The increase in relative protein content in terms of protein percentage (P%) and the decrease in lipid relative content (L%) of the total organic matter (OM) with size observed are consistent with the definition of Type 1 larvae. Protein relative content increased until the P% in larvae reached ～71%, whereas L% and carbohydrate relative content (CH%) declined, exhibiting minimum values of ～20, and ～6%, respectively. In general terms, the feeding condition of larvae, as defined by their RNA/DNA ratio, was good. Food did not seem to be a major factor limiting larval growth in the study area throughout late spring and early summer. The RNA/DNA ratio was size-related and increased during larval growth up to an asymptotic optimal value of ～3.6 in postflex-ion larvae in relative protein content, in terms of protein percentage (P%). The 'actual' RNA/DNA ratios found in a given larval population when compared with the 'starving' RNA/DNA ratio, and using an 'absolutely optimal' value as complementary information, could be used to determine the overall status of the population. Parental effect of low egg quality is a possible explanation of delayed ontogenetical development of larvae from July 2000.
机译：相对于它们的生化组成，分析了比斯开湾的幼虫Engraulis encrasicolus幼虫的生长和状况。在幼虫发生期间对幼虫的蛋白质，碳水化合物，脂质，DNA和RNA含量进行定量，以分析与生长相关的变化。在每个幼虫阶段，蛋白质是en肠球菌的主要有机成分，其次是脂质和碳水化合物。相对蛋白含量（P％）的相对蛋白含量的增加和总有机物（OM）的脂质相对含量（L％）的降低随观察到的大小而变化，与1型幼虫的定义一致。蛋白质相对含量增加，直到幼虫中的P％达到〜71％，而L％和碳水化合物相对含量（CH％）下降，分别达到最小值〜20和〜6％。一般而言，由幼虫的RNA / DNA比例定义的幼虫的摄食条件良好。在整个春季末和初夏期间，食物似乎并不是限制研究区域幼虫生长的主要因素。 RNA / DNA的比例与大小有关，在幼虫生长期间，相对于蛋白质的相对含量（以蛋白质百分比（P％）计），折弯后幼虫的最大渐近最优值约为3.6。与“饥饿的” RNA / DNA比率相比，在给定的幼虫种群中发现的“实际” RNA / DNA比率，并使用“绝对最佳”值作为补充信息，可用于确定种群的总体状况。产蛋质量低的父母效应可能是从2000年7月开始延缓幼体发育的可能原因。

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