...
首页> 外文期刊>Marine biology >Factors determining the hatching success of Antarctic krill Euphausia superba embryo: lipid and fatty acid composition
【24h】

Factors determining the hatching success of Antarctic krill Euphausia superba embryo: lipid and fatty acid composition

机译:决定南极磷虾Euphausia superba胚胎孵化成功的因素:脂质和脂肪酸组成

获取原文
获取原文并翻译 | 示例
           

摘要

The present study addresses the effect of maternal diet on hatching success and condition of embryos and larvae of Antarctic krill Euphausia superba. Lipid and fatty acid content and composition were determined in field and laboratory samples. Developmental stages analyzed in embryos included: multiple-cell, gastrula, and limb-bud stages. Larval stages analyzed included: nauplius I, nauplius II, and metanauplius. Laboratory-reared embryos were spawned by gravid females incubated under three feeding groups: (1) phytoplankton mixture, (2) phytoplankton mixture and minced clam, and (3) phytoplankton mixture,minced clam, and commercial larval food. Hatching success was highest in group 3 (100%), lowest in group 1 (0%), and highly variable in field samples (0-48%). Lipid decreased slightly in embryos during embryonic development, while large decreases in lipid were found during nauplius development. High levels of 18:2(n-6), 20:4(n-6), and 22:6(n-3) observed with group 3 samples coincided with high hatching success in krill embryos. The ratio of 22:6(n-3)/20:5(n-3) also correlated to hatching success of embryos. The fatty acid profile of embryos in group 3 was similar to that of the field-collected embryos, reflecting the contribution of the commercial larval food in the maternal diet. In our study, the maternal diet was found to influence the fatty acid composition of embryos and in turn affects the hatching success of krill. Specific polyunsaturated fatty acids appeared to play important roles in embryogenesis in krill.
机译:本研究探讨母体饮食对南极磷虾Euphausia superba的孵化成功率以及胚胎和幼虫状况的影响。在田间和实验室样品中测定脂质和脂肪酸含量及组成。在胚胎中分析的发育阶段包括:多细胞,胃和肢芽阶段。分析的幼虫阶段包括:无节幼体I,无节幼体II和变节幼体。在三个喂养组中孵化的雌性雌虫产下实验室饲养的胚胎:(1)浮游植物混合物,(2)浮游植物混合物和切碎的蛤,(3)浮游植物混合物,切碎的蛤,和幼虫食物。第3组的孵化成功率最高(100%),第1组的孵化成功率最低(0%),而野外样品的孵化成功率差异很大(0-48%)。在胚胎发育过程中,脂质在胚胎中的含量略有下降,而在无节幼体发育过程中,脂质的含量则下降了很多。在第3组样品中观察到高水平的18:2(n-6),20:4(n-6)和22:6(n-3),与磷虾胚胎的高孵化率相吻合。 22:6(n-3)/ 20:5(n-3)的比例也与胚胎孵化成功相关。第3组中的胚胎的脂肪酸分布与田间采集的胚胎相似,这反映了商业幼虫食品在母体饮食中的贡献。在我们的研究中,发现母体饮食会影响胚胎的脂肪酸组成,进而影响磷虾的孵化成功率。特定的多不饱和脂肪酸似乎在磷虾的胚胎发生中起重要作用。

著录项

  • 来源
    《Marine biology》 |2011年第10期|p.2313-2325|共13页
  • 作者单位

    Institute of Antarctic and Southern Ocean Studies, University of Tasmania, Private Bag 77, Hobart, TAS 7001, Australia,Australian Antarctic Division, Channel Highway, Kingston, TAS 7050, Australia,ACE CRC (Antarctic Climate and Ecosystems, Cooperative Research Centre), University of Tasmania, Private Bag 80, Hobart, TAS, Australia,Wynn Macau Aquarium, Rua Cidade de Sintra, Nape, Macau;

    Institute of Antarctic and Southern Ocean Studies, University of Tasmania, Private Bag 77, Hobart, TAS 7001, Australia,Institute of Marine and Antarctic Research, University of Tasmania, Private Bag 129, Hobart, TAS, Australia;

    Australian Antarctic Division, Channel Highway, Kingston, TAS 7050, Australia;

    ACE CRC (Antarctic Climate and Ecosystems, Cooperative Research Centre), University of Tasmania, Private Bag 80, Hobart, TAS, Australia,Institute of Marine and Antarctic Research, University of Tasmania, Private Bag 129, Hobart, TAS, Australia,CSIRO Marine and Atmospheric Research, Wealth from Oceans Flagship, GPO Box 1538, Hobart, TAS 7001, Australia;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号