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首页> 外文期刊>Aquaculture International >Fatty acids as a tool to compare cachara (Pseudoplatystoma reticulatum) (Siluriformes: Pimelodidae) and hybrid (Pseudoplatystoma corruscans × Pseudoplatystoma reticulatum) larvae during early development
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Fatty acids as a tool to compare cachara (Pseudoplatystoma reticulatum) (Siluriformes: Pimelodidae) and hybrid (Pseudoplatystoma corruscans × Pseudoplatystoma reticulatum) larvae during early development

机译：脂肪酸作为比较幼虫在早期发育过程中的char鱼（拟假单胞菌：Pi形纲）和杂种（拟假单胞菌×拟假单胞菌）的工具

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摘要

In this study, we investigated the physiological alterations during ontogeny for cachara (Pseudoplatystoma reticulatum) and their hybrid larvae (Pseudoplatystoma corruscans × P. reticulatum) using lipids and fatty acids as physiological tools to elucidate the basis for differences in these groups’ productivity in an industrial setting. Eggs and larvae samples were collected during January and February of 2008 in the city of Bandeirantes, MS, and were divided into three primary phases: phase I (0–16 h after fertilization); phase II (24 h after fertilization to 6 days after fertilization); and phase III (7–25 days after fertilization). The larvae of both groups showed a high degree of similarity, suggesting that the hybrid larvae showed a high level of heritability from the cachara broodstock. Analysis of the total lipid content provided evidence that there is no alteration in lipid concentration during ontogeny for both groups (i.e., the cachara and hybrids). However, the fatty acid profile showed that during the endogenous feeding period (phase II), when the larvae must use the energy reserves from the mother, the cachara larvae used mainly monounsaturated fatty acids for development. This is typical for most fish species, though notably, the hybrids preferentially used saturated fatty acids. Furthermore, certain specific changes demonstrate unique patterns of energy utilization and structural substrates, which may aid in elucidating the empirical differences reported by fish farmers (i.e., that the hybrids perform better than cacharas in captivity).
机译：在这项研究中，我们调查了使用糖类和脂肪酸作为生理工具，来揭示卡恰拉（Pseudoplatystoma reticulatum）及其杂种幼虫（Pseudoplatystoma corruscans×P. reticulatum）个体发育过程中的生理变化，以阐明这些群体生产力差异的基础。工业环境。鸡蛋和幼虫样品于2008年1月和2月在密西西比州的班代兰特市采集，分为三个主要阶段：第一阶段（受精后0–16小时）；第二阶段为第一阶段。第二阶段（受精后24小时至受精后6天）；第三阶段（受精后7-25天）。两组幼虫都显示出高度的相似性，表明杂种幼虫从ca木亲鱼中显示出高水平的遗传力。对总脂质含量的分析提供了证据，表明两组的个体发育过程中脂质浓度没有变化（即，卡恰拉和杂种）。然而，脂肪酸谱显示，在内源性饲喂期（阶段II）中，当幼虫必须利用母亲的能量储备时，ca虫幼虫主要使用单不饱和脂肪酸进行发育。这对于大多数鱼类来说都是典型的，尽管值得注意的是，杂种优先使用饱和脂肪酸。此外，某些特定的变化表明了能量利用和结构底物的独特模式，这可能有助于阐明养鱼户所报告的经验差异（即，在圈养条件下杂种的表现优于木瓜属）。

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  • 来源
    《Aquaculture International》 |2012年第6期|p.1139-1160|共22页
  • 作者

    P. H. Mello; B. C. Araújo; R. L. L. Venturieri; R. G. Moreira;

  • 作者单位

    Department of Physiology, Institute of Biosciences, University of São Paulo, Cidade Universitária, Rua do Matão, travessa 14, n 321, 05508-900, São Paulo, SP, Brazil;

    Department of Physiology, Institute of Biosciences, University of São Paulo, Cidade Universitária, Rua do Matão, travessa 14, n 321, 05508-900, São Paulo, SP, Brazil;

    Original Amazon Assessoria Empresarial, São Paulo, SP, Brazil;

    Department of Physiology, Institute of Biosciences, University of São Paulo, Cidade Universitária, Rua do Matão, travessa 14, n 321, 05508-900, São Paulo, SP, Brazil;

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  • 正文语种 eng
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  • 关键词

    Fatty acids; Hybridization; Metabolism; Larvae; Lipids; Pseudoplatystoma;

    机译：脂肪酸;杂交;新陈代谢;幼虫;脂质;假单胞菌;

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