Experimental Analysis of Waterborne Chemical Cues as Agents Regulating Larval Settlement and Metamorphosis

水性化学信号作为幼虫沉降和变态调节剂的实验分析

• 批准号: 9416749
• 负责人: Richard Zimmer
• 金额: $ 30.49万
• 依托单位: University of South Carolina at Columbia
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-01-01 至 1998-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9416749&HistoricalAwards=false
• 关键词: Experimental; Analysis; Waterborne; Chemical; Cues

9416749 Zimmer-Faust The process of recruitment of pelagic larvae into benthic habitats has been given serious attention in biological oceanography because of its role as a "bottleneck" in the population dynamics of marine organisms. In the field of larval ecology, emphasis has been given to : 1) the hydrodynamics of larval delivery to the substratum, 2) the physiological and nutritional condition of larvae, which provides information on survivorship in the field, and 3) chemical cues for larvae that dictate attachment sites in the benthic environment. Dr. Zimmer-Faust has found evidence that larvae of a commercially important species, the American Oyster, respond to a chemical in the water column that is sequestered by adults of the same species. This project will identify the chemical composition of the cue, and perform in situ evaluation of the role of this cue on larval settlement, and will distinguish the role of this water-borne cue versus the larval attraction to chemicals from surface films on substrata, which has been repeatedly documented. This project will contribute to the program's objective of making incremental steps in the understanding of the mechanisms which control the input of larval propagules into adult populations. If the role of water-borne chemical cues is indeed significant, this work could lead to the restructuring of current theory in the recruitment ecology of marine organisms.

9416749 Zimmer-Faust 中上层幼虫招募到底栖栖息地的过程因其在海洋生物种群动态中的“瓶颈”作用而受到生物海洋学的严重关注。 在幼虫生态学领域，重点关注：1）幼虫输送到基质的流体动力学，2）幼虫的生理和营养状况，它提供了有关野外生存的信息，3）幼虫的化学线索决定了底栖环境中的附着位点。 齐默-福斯特博士发现了证据，表明商业上重要的物种美国牡蛎的幼虫会对水体中的化学物质产生反应，而该化学物质是由同一物种的成体隔离的。 该项目将识别线索的化学成分，并就该线索对幼虫沉降的作用进行原位评估，并将区分这种水源线索的作用与幼虫对基质表面薄膜化学物质的吸引力，这已被多次记录。 该项目将有助于实现该计划的目标，即逐步了解控制幼虫繁殖体进入成年种群的机制。 如果水性化学线索的作用确实很重要，这项工作可能会导致海洋生物补充生态学当前理论的重组。