...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Marine biology >The dual functions of sea urchin gonads are reflected in the temporal variations of their biochemistry
【24h】

The dual functions of sea urchin gonads are reflected in the temporal variations of their biochemistry

机译：海胆性腺的双重功能反映在其生物化学的时间变化中

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Fatty acid analyses are emerging as a powerful technique to probe trophic interactions between organisms. In this paper, the application of both this procedure and gonad index (GI) determination on two populations (intertidal and subtidal) of the echinoid Psammechinus miliaris is reported. The investigation spanned the 3-month spawning period of Scottish west coast populations. In both populations a progressive decrease in the GI was found, coupled with an increasing maturity stage (from mature to spent). Sexual maturation and decrease in GI was synchronous between the two populations. In conjunction, there were distinct changes in gonad biochemistry. Differences in the fatty acid composition of the gonad reflected the changes in sexual maturation. Mature males and females had significant differences in the fatty acid composition of their gonads, whereas post-spawned individuals showed no gender differences. Male urchins had higher levels of polyunsaturated fatty acids (PUFAs) compared to females, and there was a dramatic reduction in the fatty acids 22:6(n-3) and 20:5(n-3) with increasing maturity stage. Using multivariate statistical techniques, these changes in the fatty acid composition of the sea urchin gonad were linked to habitat related diet differences combined with gender differences. These changes in the fatty acid signatures clearly reflect the dual function of the gonad as both a nutrient store and a reproductive organ.
机译：脂肪酸分析作为一种探测生物之间营养相互作用的强大技术正在兴起。在本文中，报道了该方法和性腺指数（GI）测定法在两种棘突类棘突P虫（Psammechinus miliaris）的种群（潮间和潮下）上的应用。该调查涵盖了苏格兰西海岸种群三个月的产卵期。在这两个种群中，都发现胃肠道的逐渐减少，以及成熟期的增加（从成熟到消耗）。两种人群的性成熟和胃肠道的下降是同步的。同时，性腺生物化学也发生了明显变化。性腺中脂肪酸组成的差异反映了性成熟的变化。成熟的雄性和雌性在性腺的脂肪酸组成上有显着差异，而产卵后的个体则没有性别差异。与雌性相比，雄性海胆的多不饱和脂肪酸（PUFA）含量更高，随着成熟阶段的增加，脂肪酸22：6（n-3）和20：5（n-3）的含量显着降低。使用多元统计技术，海胆性腺中脂肪酸组成的这些变化与栖息地相关的饮食差异和性别差异相关。脂肪酸特征的这些变化清楚地反映了性腺作为营养物和生殖器官的双重功能。

著录项

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