• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >INTRASPECIFIC INTERACTIONS AND FEEDING BIOLOGY OF THE DEPOSIT FEEDER, SCOLOPLOS FRAGILIS (VERRILL, 1873) (ORBINIDAE: POLYCHAETA).
【24h】

INTRASPECIFIC INTERACTIONS AND FEEDING BIOLOGY OF THE DEPOSIT FEEDER, SCOLOPLOS FRAGILIS (VERRILL, 1873) (ORBINIDAE: POLYCHAETA).

机译：矿床进食者斯科拉普洛斯·弗拉吉利斯（VERRILL，1873）的种内相互作用和饲喂生物学（ORBINIDAE：POLYCHAETA）。

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

How intra- and interspecific interactions among deposit feeding organisms affect the feeding biology of these organisms is only partially understood. Yet, if interactions are important to feeding biology of deposit feeders, then the impact of such interactions must be considered in detritus food chain models. The purpose of this dissertation was to study the feeding biology of the burrowing, sedimentary deposit-feeder Scoloplos fragilis (Verrill, 1873), with emphasis on the influence of intraspecific interactions on sediment reworking (= defecation) rates, emigration behavior and ingestion rates.;Sediment reworking (= defecation) rates varied nonlinearly with changes in density of S. fragilis. As density increases S. fragilis emigrates from the sediments with increasing frequency. Reworking rates are equivalent to those of other polychaete species of similar size. Traditional schemes of mobility modes in marine, benthic invertebrates must be modified to include organisms that spend time in the water column. A method, developed to measure influence of changes in density of S. fragilis on its ingestion rate, entails marking the sediments with a ('14)C label and feeding them to S. fragilis. While ingestion rate decreases with increases in density, these differences are not statistically significant because S. fragilis feed at variable rates.;S. fragilis ingests particulate material with its sac-like, lobate, ciliated, mucus-covered proboscis, that leads to the straight, ciliated digestive tract consisting of the esophagus, stomach, intestine, and anus. S. fragilis ingests a higher percentage of particles 0.2 mm in diameter and a lower percentage of particles 0.1-0.2 mm in diameter than were available in field sediments. When held in seawater, S. fragilis clears its gut of sediments in three hours and when returned to sediments, S. fragilis fills its gut within an hour. When S. fragilis feeds on small (23 um) and large (200-350) particles simultaneously after the gut has cleared, small particles move a greater distance down the digestive tract than large ones. This difference is not always statistically different.
机译：沉积物摄食生物之间的种内和种间相互作用如何影响这些生物的摄食生物学只是部分了解。然而，如果相互作用对于喂养存款饲养者的生物学很重要，则必须在碎屑食物链模型中考虑这种相互作用的影响。本论文的目的是研究穴居，沉积沉积物给食者Scoloplos fragilis（Verrill，1873）的摄食生物学，重点是种内相互作用对沉积物返工率（排便），移民行为和摄食率的影响。 ;沉积物返工率（=排便率）随脆弱脆弱链球菌密度的变化而非线性变化。随着密度的增加，脆弱类链球菌以增加的频率从沉积物中移出。返工率等同于其他类似大小的多毛种。必须修改海洋底栖无脊椎动物中传统的迁移模式，以包括在水柱中花费时间的生物。已开发出一种方法来测量脆弱类链球菌密度变化对其摄入速率的影响，该方法需要用（'14）C标签标记沉积物并将其喂入脆弱类链球菌。尽管摄食率随着密度的增加而降低，但这些差异在统计学上并不显着，因为脆弱的链球菌以不同的速率进食。脆弱类通过其囊状，叶状，纤毛，粘液覆盖的长鼻摄取颗粒状物质，从而导致直的，纤毛的消化道由食道，胃，肠和肛门组成。与田间沉积物相比，脆弱类链球菌摄入直径百分比为0.2 mm的颗粒的百分比更高，直径百分比为0.1-0.2 mm的颗粒的百分比更低。当将其置于海水中时，易碎链霉菌会在三个小时内清除肠道内的沉积物，当返回沉积物时，易碎链霉菌会在一小时内填满肠道。当肠道清除后，脆弱链球菌同时以小颗粒（23 um）和大颗粒（200-350）为食时，小颗粒在消化道中的移动距离要大于大颗粒。这种差异在统计上并不总是相同的。

著录项

  • 作者

    BROWN, BETSY.;

  • 作者单位

    University of Delaware.;

  • 授予单位 University of Delaware.;
  • 学科 Ecology.
  • 学位 Ph.D.
  • 年度 1982
  • 页码 135 p.
  • 总页数 135
  • 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
  • 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