...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Marine biology >Winter Food Utilisation By Sympatric Mysids In The Baltic Sea, Studied By Combined Gut Content And Stable Isotope Analyses
【24h】

Winter Food Utilisation By Sympatric Mysids In The Baltic Sea, Studied By Combined Gut Content And Stable Isotope Analyses

机译：结合肠内含物量和稳定同位素分析研究波罗的海同胞寄生虫对冬季食物的利用

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

We studied the winter dietary characteristics of two sympatric mysid species, Mysis mixta and M. relicta, which exploit both benthic and pelagic habitats during diel vertical migrations. Samples collected before and after the ice-covered period in the northern Baltic Sea were investigated using both stomach content analyses and stable isotope analyses of carbon and nitrogen. Both of the mysid species were omnivorous during winter and utilised both benthic and pelagic food sources. The main food source before the ice period was calanoid copepods (40 and 36% for M. mixta and M. relicta, respectively), and after ice-out calanoid copepods (23%) and zooplankton resting eggs (23%) for M. mixta and diatoms (44%) and calanoids (25%) for M. relicta. Their patterns of food utilisation broadly followed seasonal fluctuations in the abundance of the main prey groups. Although pelagic food availability is low in winter both mysid species utilised pelagic prey widely. We also show that when combining these different diet analysis methods it is important to take into account the time lag in isotopic signatures, otherwise the obtained results do not correspond but instead show the feeding history at different times.
机译：我们研究了两种同伴的象甲类Mysixta和M. relicta的冬季饮食特性，它们在diel垂直迁移过程中同时利用了底栖和浮游生境。使用胃内容物分析和碳和氮的稳定同位素分析，对在波罗的海北部冰雪覆盖之前和之后收集的样品进行了调查。两种类蝇科动物在冬季都是杂食性的，并利用了底栖和中上层食物来源。冰期之前的主要食物来源是cal类an足类动物（M. mixta和relicta分别为40％和36％），冰出后的类cal足类co足动物（23％）和浮游动物静息卵（23％）之后。 mixta和硅藻（44％）和calanoids（25％）。他们的粮食利用方式大致上跟随主要猎物群体的数量的季节性波动。尽管冬季中上层食物的可利用性较低，但这两种类蝇科物种都广泛利用中上层捕食。我们还表明，当结合使用这些不同的饮食分析方法时，重要的是要考虑到同位素标记中的时间滞后，否则获得的结果不会对应，而是显示不同时间的喂养历史。

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